Implement IF EXISTS for additional REMOVE-statements (#3377)

Co-authored-by: Tobie Morgan Hitchcock <tobie@surrealdb.com>
Co-authored-by: Rushmore Mushambi <rushmore@surrealdb.com>

core/src/err/mod.rs

@@ -319,12 +319,26 @@ pub enum Error {
 		value: String,
 	},
 
+	/// The requested event does not exist
+	#[error("The event '{value}' does not exist")]
+	#[cfg(feature = "sql2")]
+	EvNotFound {
+		value: String,
+	},
+
 	/// The requested function does not exist
 	#[error("The function 'fn::{value}' does not exist")]
 	FcNotFound {
 		value: String,
 	},
 
+	/// The requested field does not exist
+	#[error("The field '{value}' does not exist")]
+	#[cfg(feature = "sql2")]
+	FdNotFound {
+		value: String,
+	},
+
 	/// The requested model does not exist
 	#[error("The model 'ml::{value}' does not exist")]
 	MlNotFound {

core/src/kvs/tx.rs

@@ -1908,6 +1908,36 @@ impl Transaction {
 		Ok(val.into())
 	}
 
+	/// Retrieve a specific function definition from a database.
+	#[cfg(feature = "sql2")]
+	pub async fn get_db_function(
+		&mut self,
+		ns: &str,
+		db: &str,
+		fc: &str,
+	) -> Result<DefineFunctionStatement, Error> {
+		let key = crate::key::database::fc::new(ns, db, fc);
+		let val = self.get(key).await?.ok_or(Error::FcNotFound {
+			value: fc.to_owned(),
+		})?;
+		Ok(val.into())
+	}
+
+	/// Retrieve a specific function definition from a database.
+	#[cfg(feature = "sql2")]
+	pub async fn get_db_param(
+		&mut self,
+		ns: &str,
+		db: &str,
+		pa: &str,
+	) -> Result<DefineParamStatement, Error> {
+		let key = crate::key::database::pa::new(ns, db, pa);
+		let val = self.get(key).await?.ok_or(Error::PaNotFound {
+			value: pa.to_owned(),
+		})?;
+		Ok(val.into())
+	}
+
 	/// Retrieve a specific scope definition.
 	pub async fn get_sc(
 		&mut self,
@@ -1983,6 +2013,60 @@ impl Transaction {
 		Ok(val.into())
 	}
 
+	/// Retrieve an event for a table.
+	#[cfg(feature = "sql2")]
+	pub async fn get_tb_event(
+		&mut self,
+		ns: &str,
+		db: &str,
+		tb: &str,
+		ev: &str,
+	) -> Result<DefineEventStatement, Error> {
+		let key = crate::key::table::ev::new(ns, db, tb, ev);
+		let key_enc = crate::key::table::ev::Ev::encode(&key)?;
+		trace!("Getting ev ({:?}) {:?}", ev, crate::key::debug::sprint_key(&key_enc));
+		let val = self.get(key_enc).await?.ok_or(Error::EvNotFound {
+			value: ev.to_string(),
+		})?;
+		Ok(val.into())
+	}
+
+	/// Retrieve an event for a table.
+	#[cfg(feature = "sql2")]
+	pub async fn get_tb_field(
+		&mut self,
+		ns: &str,
+		db: &str,
+		tb: &str,
+		fd: &str,
+	) -> Result<DefineFieldStatement, Error> {
+		let key = crate::key::table::fd::new(ns, db, tb, fd);
+		let key_enc = crate::key::table::fd::Fd::encode(&key)?;
+		trace!("Getting fd ({:?}) {:?}", fd, crate::key::debug::sprint_key(&key_enc));
+		let val = self.get(key_enc).await?.ok_or(Error::FdNotFound {
+			value: fd.to_string(),
+		})?;
+		Ok(val.into())
+	}
+
+	/// Retrieve an event for a table.
+	#[cfg(feature = "sql2")]
+	pub async fn get_tb_index(
+		&mut self,
+		ns: &str,
+		db: &str,
+		tb: &str,
+		ix: &str,
+	) -> Result<DefineFieldStatement, Error> {
+		let key = crate::key::table::ix::new(ns, db, tb, ix);
+		let key_enc = crate::key::table::ix::Ix::encode(&key)?;
+		trace!("Getting ix ({:?}) {:?}", ix, crate::key::debug::sprint_key(&key_enc));
+		let val = self.get(key_enc).await?.ok_or(Error::IxNotFound {
+			value: ix.to_string(),
+		})?;
+		Ok(val.into())
+	}
+
 	/// Add a namespace with a default configuration, only if we are in dynamic mode.
 	pub async fn add_ns(
 		&mut self,

core/src/sql/v1/statements/remove/param.rs

@@ -39,6 +39,6 @@ impl RemoveParamStatement {
 
 impl Display for RemoveParamStatement {
 	fn fmt(&self, f: &mut Formatter) -> fmt::Result {
-		write!(f, "REMOVE PARAM {}", self.name)
+		write!(f, "REMOVE PARAM ${}", self.name)
 	}
 }

core/src/sql/v2/statements/remove/analyzer.rs

@@ -10,9 +10,11 @@ use std::fmt::{self, Display, Formatter};
 
 #[derive(Clone, Debug, Default, Eq, PartialEq, PartialOrd, Serialize, Deserialize, Store, Hash)]
 #[cfg_attr(feature = "arbitrary", derive(arbitrary::Arbitrary))]
-#[revisioned(revision = 1)]
+#[revisioned(revision = 2)]
 pub struct RemoveAnalyzerStatement {
 	pub name: Ident,
+	#[revision(start = 2)]
+	pub if_exists: bool,
 }
 
 impl RemoveAnalyzerStatement {
@@ -22,23 +24,39 @@ impl RemoveAnalyzerStatement {
 		opt: &Options,
 		txn: &Transaction,
 	) -> Result<Value, Error> {
-		// Allowed to run?
+		match async {
-		opt.is_allowed(Action::Edit, ResourceKind::Analyzer, &Base::Db)?;
+			// Allowed to run?
-		// Claim transaction
+			opt.is_allowed(Action::Edit, ResourceKind::Analyzer, &Base::Db)?;
-		let mut run = txn.lock().await;
+			// Claim transaction
-		// Clear the cache
+			let mut run = txn.lock().await;
-		run.clear_cache();
+			// Clear the cache
-		// Delete the definition
+			run.clear_cache();
-		let key = crate::key::database::az::new(opt.ns(), opt.db(), &self.name);
+			// Get the definition
-		run.del(key).await?;
+			let az = run.get_db_analyzer(opt.ns(), opt.db(), &self.name).await?;
-		// TODO Check that the analyzer is not used in any schema
+			// Delete the definition
-		// Ok all good
+			let key = crate::key::database::az::new(opt.ns(), opt.db(), &az.name);
-		Ok(Value::None)
+			run.del(key).await?;
+			// TODO Check that the analyzer is not used in any schema
+			// Ok all good
+			Ok(Value::None)
+		}
+		.await
+		{
+			Err(Error::AzNotFound {
+				..
+			}) if self.if_exists => Ok(Value::None),
+			v => v,
+		}
 	}
 }
 
 impl Display for RemoveAnalyzerStatement {
 	fn fmt(&self, f: &mut Formatter) -> fmt::Result {
-		write!(f, "REMOVE ANALYZER {}", self.name)
+		write!(f, "REMOVE ANALYZER")?;
+		if self.if_exists {
+			write!(f, " IF EXISTS")?
+		}
+		write!(f, " {}", self.name)?;
+		Ok(())
 	}
 }

core/src/sql/v2/statements/remove/database.rs

@@ -10,9 +10,11 @@ use std::fmt::{self, Display, Formatter};
 
 #[derive(Clone, Debug, Default, Eq, PartialEq, PartialOrd, Serialize, Deserialize, Store, Hash)]
 #[cfg_attr(feature = "arbitrary", derive(arbitrary::Arbitrary))]
-#[revisioned(revision = 1)]
+#[revisioned(revision = 2)]
 pub struct RemoveDatabaseStatement {
 	pub name: Ident,
+	#[revision(start = 2)]
+	pub if_exists: bool,
 }
 
 impl RemoveDatabaseStatement {
@@ -23,25 +25,41 @@ impl RemoveDatabaseStatement {
 		opt: &Options,
 		txn: &Transaction,
 	) -> Result<Value, Error> {
-		// Allowed to run?
+		match async {
-		opt.is_allowed(Action::Edit, ResourceKind::Database, &Base::Ns)?;
+			// Allowed to run?
-		// Claim transaction
+			opt.is_allowed(Action::Edit, ResourceKind::Database, &Base::Ns)?;
-		let mut run = txn.lock().await;
+			// Claim transaction
-		// Clear the cache
+			let mut run = txn.lock().await;
-		run.clear_cache();
+			// Clear the cache
-		// Delete the definition
+			run.clear_cache();
-		let key = crate::key::namespace::db::new(opt.ns(), &self.name);
+			// Get the definition
-		run.del(key).await?;
+			let db = run.get_db(opt.ns(), &self.name).await?;
-		// Delete the resource data
+			// Delete the definition
-		let key = crate::key::database::all::new(opt.ns(), &self.name);
+			let key = crate::key::namespace::db::new(opt.ns(), &db.name);
-		run.delp(key, u32::MAX).await?;
+			run.del(key).await?;
-		// Ok all good
+			// Delete the resource data
-		Ok(Value::None)
+			let key = crate::key::database::all::new(opt.ns(), &db.name);
+			run.delp(key, u32::MAX).await?;
+			// Ok all good
+			Ok(Value::None)
+		}
+		.await
+		{
+			Err(Error::DbNotFound {
+				..
+			}) if self.if_exists => Ok(Value::None),
+			v => v,
+		}
 	}
 }
 
 impl Display for RemoveDatabaseStatement {
 	fn fmt(&self, f: &mut Formatter) -> fmt::Result {
-		write!(f, "REMOVE DATABASE {}", self.name)
+		write!(f, "REMOVE DATABASE")?;
+		if self.if_exists {
+			write!(f, " IF EXISTS")?
+		}
+		write!(f, " {}", self.name)?;
+		Ok(())
 	}
 }

core/src/sql/v2/statements/remove/event.rs

@@ -10,10 +10,12 @@ use std::fmt::{self, Display, Formatter};
 
 #[derive(Clone, Debug, Default, Eq, PartialEq, PartialOrd, Serialize, Deserialize, Store, Hash)]
 #[cfg_attr(feature = "arbitrary", derive(arbitrary::Arbitrary))]
-#[revisioned(revision = 1)]
+#[revisioned(revision = 2)]
 pub struct RemoveEventStatement {
 	pub name: Ident,
 	pub what: Ident,
+	#[revision(start = 2)]
+	pub if_exists: bool,
 }
 
 impl RemoveEventStatement {
@@ -24,25 +26,41 @@ impl RemoveEventStatement {
 		opt: &Options,
 		txn: &Transaction,
 	) -> Result<Value, Error> {
-		// Allowed to run?
+		match async {
-		opt.is_allowed(Action::Edit, ResourceKind::Event, &Base::Db)?;
+			// Allowed to run?
-		// Claim transaction
+			opt.is_allowed(Action::Edit, ResourceKind::Event, &Base::Db)?;
-		let mut run = txn.lock().await;
+			// Claim transaction
-		// Clear the cache
+			let mut run = txn.lock().await;
-		run.clear_cache();
+			// Clear the cache
-		// Delete the definition
+			run.clear_cache();
-		let key = crate::key::table::ev::new(opt.ns(), opt.db(), &self.what, &self.name);
+			// Get the definition
-		run.del(key).await?;
+			let ev = run.get_tb_event(opt.ns(), opt.db(), &self.what, &self.name).await?;
-		// Clear the cache
+			// Delete the definition
-		let key = crate::key::table::ev::prefix(opt.ns(), opt.db(), &self.what);
+			let key = crate::key::table::ev::new(opt.ns(), opt.db(), &ev.what, &ev.name);
-		run.clr(key).await?;
+			run.del(key).await?;
-		// Ok all good
+			// Clear the cache
-		Ok(Value::None)
+			let key = crate::key::table::ev::prefix(opt.ns(), opt.db(), &ev.what);
+			run.clr(key).await?;
+			// Ok all good
+			Ok(Value::None)
+		}
+		.await
+		{
+			Err(Error::EvNotFound {
+				..
+			}) if self.if_exists => Ok(Value::None),
+			v => v,
+		}
 	}
 }
 
 impl Display for RemoveEventStatement {
 	fn fmt(&self, f: &mut Formatter) -> fmt::Result {
-		write!(f, "REMOVE EVENT {} ON {}", self.name, self.what)
+		write!(f, "REMOVE EVENT")?;
+		if self.if_exists {
+			write!(f, " IF EXISTS")?
+		}
+		write!(f, " {} ON {}", self.name, self.what)?;
+		Ok(())
 	}
 }

core/src/sql/v2/statements/remove/field.rs

@@ -9,11 +9,13 @@ use serde::{Deserialize, Serialize};
 use std::fmt::{self, Display, Formatter};
 
 #[derive(Clone, Debug, Default, Eq, PartialEq, PartialOrd, Serialize, Deserialize, Store, Hash)]
-#[revisioned(revision = 1)]
+#[revisioned(revision = 2)]
 #[cfg_attr(feature = "arbitrary", derive(arbitrary::Arbitrary))]
 pub struct RemoveFieldStatement {
 	pub name: Idiom,
 	pub what: Ident,
+	#[revision(start = 2)]
+	pub if_exists: bool,
 }
 
 impl RemoveFieldStatement {
@@ -24,26 +26,43 @@ impl RemoveFieldStatement {
 		opt: &Options,
 		txn: &Transaction,
 	) -> Result<Value, Error> {
-		// Allowed to run?
+		match async {
-		opt.is_allowed(Action::Edit, ResourceKind::Field, &Base::Db)?;
+			// Allowed to run?
-		// Claim transaction
+			opt.is_allowed(Action::Edit, ResourceKind::Field, &Base::Db)?;
-		let mut run = txn.lock().await;
+			// Claim transaction
-		// Clear the cache
+			let mut run = txn.lock().await;
-		run.clear_cache();
+			// Clear the cache
-		// Delete the definition
+			run.clear_cache();
-		let fd = self.name.to_string();
+			// Get the definition
-		let key = crate::key::table::fd::new(opt.ns(), opt.db(), &self.what, &fd);
+			let fd_name = self.name.to_string();
-		run.del(key).await?;
+			let fd = run.get_tb_field(opt.ns(), opt.db(), &self.what, &fd_name).await?;
-		// Clear the cache
+			// Delete the definition
-		let key = crate::key::table::fd::prefix(opt.ns(), opt.db(), &self.what);
+			let fd_name = fd.name.to_string();
-		run.clr(key).await?;
+			let key = crate::key::table::fd::new(opt.ns(), opt.db(), &self.what, &fd_name);
-		// Ok all good
+			run.del(key).await?;
-		Ok(Value::None)
+			// Clear the cache
+			let key = crate::key::table::fd::prefix(opt.ns(), opt.db(), &self.what);
+			run.clr(key).await?;
+			// Ok all good
+			Ok(Value::None)
+		}
+		.await
+		{
+			Err(Error::FdNotFound {
+				..
+			}) if self.if_exists => Ok(Value::None),
+			v => v,
+		}
 	}
 }
 
 impl Display for RemoveFieldStatement {
 	fn fmt(&self, f: &mut Formatter) -> fmt::Result {
-		write!(f, "REMOVE FIELD {} ON {}", self.name, self.what)
+		write!(f, "REMOVE FIELD")?;
+		if self.if_exists {
+			write!(f, " IF EXISTS")?
+		}
+		write!(f, " {} ON {}", self.name, self.what)?;
+		Ok(())
 	}
 }

core/src/sql/v2/statements/remove/function.rs

@@ -10,9 +10,11 @@ use std::fmt::{self, Display};
 
 #[derive(Clone, Debug, Default, Eq, PartialEq, PartialOrd, Serialize, Deserialize, Store, Hash)]
 #[cfg_attr(feature = "arbitrary", derive(arbitrary::Arbitrary))]
-#[revisioned(revision = 1)]
+#[revisioned(revision = 2)]
 pub struct RemoveFunctionStatement {
 	pub name: Ident,
+	#[revision(start = 2)]
+	pub if_exists: bool,
 }
 
 impl RemoveFunctionStatement {
@@ -23,23 +25,39 @@ impl RemoveFunctionStatement {
 		opt: &Options,
 		txn: &Transaction,
 	) -> Result<Value, Error> {
-		// Allowed to run?
+		match async {
-		opt.is_allowed(Action::Edit, ResourceKind::Function, &Base::Db)?;
+			// Allowed to run?
-		// Claim transaction
+			opt.is_allowed(Action::Edit, ResourceKind::Function, &Base::Db)?;
-		let mut run = txn.lock().await;
+			// Claim transaction
-		// Clear the cache
+			let mut run = txn.lock().await;
-		run.clear_cache();
+			// Clear the cache
-		// Delete the definition
+			run.clear_cache();
-		let key = crate::key::database::fc::new(opt.ns(), opt.db(), &self.name);
+			// Get the definition
-		run.del(key).await?;
+			let fc = run.get_db_function(opt.ns(), opt.db(), &self.name).await?;
-		// Ok all good
+			// Delete the definition
-		Ok(Value::None)
+			let key = crate::key::database::fc::new(opt.ns(), opt.db(), &fc.name);
+			run.del(key).await?;
+			// Ok all good
+			Ok(Value::None)
+		}
+		.await
+		{
+			Err(Error::FcNotFound {
+				..
+			}) if self.if_exists => Ok(Value::None),
+			v => v,
+		}
 	}
 }
 
 impl Display for RemoveFunctionStatement {
 	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
 		// Bypass ident display since we don't want backticks arround the ident.
-		write!(f, "REMOVE FUNCTION fn::{}", self.name.0)
+		write!(f, "REMOVE FUNCTION")?;
+		if self.if_exists {
+			write!(f, " IF EXISTS")?
+		}
+		write!(f, " fn::{}", self.name.0)?;
+		Ok(())
 	}
 }

core/src/sql/v2/statements/remove/index.rs

@@ -9,11 +9,13 @@ use serde::{Deserialize, Serialize};
 use std::fmt::{self, Display, Formatter};
 
 #[derive(Clone, Debug, Default, Eq, PartialEq, PartialOrd, Serialize, Deserialize, Store, Hash)]
-#[revisioned(revision = 1)]
+#[revisioned(revision = 2)]
 #[cfg_attr(feature = "arbitrary", derive(arbitrary::Arbitrary))]
 pub struct RemoveIndexStatement {
 	pub name: Ident,
 	pub what: Ident,
+	#[revision(start = 2)]
+	pub if_exists: bool,
 }
 
 impl RemoveIndexStatement {
@@ -24,30 +26,44 @@ impl RemoveIndexStatement {
 		opt: &Options,
 		txn: &Transaction,
 	) -> Result<Value, Error> {
-		// Allowed to run?
+		match async {
-		opt.is_allowed(Action::Edit, ResourceKind::Index, &Base::Db)?;
+			// Allowed to run?
-		// Claim transaction
+			opt.is_allowed(Action::Edit, ResourceKind::Index, &Base::Db)?;
-		let mut run = txn.lock().await;
+			// Claim transaction
-		// Clear the index store cache
+			let mut run = txn.lock().await;
-		ctx.get_index_stores().index_removed(opt, &mut run, &self.what, &self.name).await?;
+			// Clear the index store cache
-		// Clear the cache
+			ctx.get_index_stores().index_removed(opt, &mut run, &self.what, &self.name).await?;
-		run.clear_cache();
+			// Clear the cache
-		// Delete the definition
+			run.clear_cache();
-		let key = crate::key::table::ix::new(opt.ns(), opt.db(), &self.what, &self.name);
+			// Delete the definition
-		run.del(key).await?;
+			let key = crate::key::table::ix::new(opt.ns(), opt.db(), &self.what, &self.name);
-		// Remove the index data
+			run.del(key).await?;
-		let key = crate::key::index::all::new(opt.ns(), opt.db(), &self.what, &self.name);
+			// Remove the index data
-		run.delp(key, u32::MAX).await?;
+			let key = crate::key::index::all::new(opt.ns(), opt.db(), &self.what, &self.name);
-		// Clear the cache
+			run.delp(key, u32::MAX).await?;
-		let key = crate::key::table::ix::prefix(opt.ns(), opt.db(), &self.what);
+			// Clear the cache
-		run.clr(key).await?;
+			let key = crate::key::table::ix::prefix(opt.ns(), opt.db(), &self.what);
-		// Ok all good
+			run.clr(key).await?;
-		Ok(Value::None)
+			// Ok all good
+			Ok(Value::None)
+		}
+		.await
+		{
+			Err(Error::IxNotFound {
+				..
+			}) if self.if_exists => Ok(Value::None),
+			v => v,
+		}
 	}
 }
 
 impl Display for RemoveIndexStatement {
 	fn fmt(&self, f: &mut Formatter) -> fmt::Result {
-		write!(f, "REMOVE INDEX {} ON {}", self.name, self.what)
+		write!(f, "REMOVE INDEX")?;
+		if self.if_exists {
+			write!(f, " IF EXISTS")?
+		}
+		write!(f, " {} ON {}", self.name, self.what)?;
+		Ok(())
 	}
 }

core/src/sql/v2/statements/remove/model.rs

@@ -9,11 +9,13 @@ use serde::{Deserialize, Serialize};
 use std::fmt::{self, Display};
 
 #[derive(Clone, Debug, Default, Eq, PartialEq, PartialOrd, Serialize, Deserialize, Store, Hash)]
-#[revisioned(revision = 1)]
+#[revisioned(revision = 2)]
 #[cfg_attr(feature = "arbitrary", derive(arbitrary::Arbitrary))]
 pub struct RemoveModelStatement {
 	pub name: Ident,
 	pub version: String,
+	#[revision(start = 2)]
+	pub if_exists: bool,
 }
 
 impl RemoveModelStatement {
@@ -24,25 +26,39 @@ impl RemoveModelStatement {
 		opt: &Options,
 		txn: &Transaction,
 	) -> Result<Value, Error> {
-		// Allowed to run?
+		match async {
-		opt.is_allowed(Action::Edit, ResourceKind::Model, &Base::Db)?;
+			// Allowed to run?
-		// Claim transaction
+			opt.is_allowed(Action::Edit, ResourceKind::Model, &Base::Db)?;
-		let mut run = txn.lock().await;
+			// Claim transaction
-		// Clear the cache
+			let mut run = txn.lock().await;
-		run.clear_cache();
+			// Clear the cache
-		// Delete the definition
+			run.clear_cache();
-		let key = crate::key::database::ml::new(opt.ns(), opt.db(), &self.name, &self.version);
+			// Delete the definition
-		run.del(key).await?;
+			let key = crate::key::database::ml::new(opt.ns(), opt.db(), &self.name, &self.version);
-		// Remove the model file
+			run.del(key).await?;
-		// TODO
+			// Remove the model file
-		// Ok all good
+			// TODO
-		Ok(Value::None)
+			// Ok all good
+			Ok(Value::None)
+		}
+		.await
+		{
+			Err(Error::MlNotFound {
+				..
+			}) if self.if_exists => Ok(Value::None),
+			v => v,
+		}
 	}
 }
 
 impl Display for RemoveModelStatement {
 	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
 		// Bypass ident display since we don't want backticks arround the ident.
-		write!(f, "REMOVE MODEL ml::{}<{}>", self.name.0, self.version)
+		write!(f, "REMOVE MODEL")?;
+		if self.if_exists {
+			write!(f, " IF EXISTS")?
+		}
+		write!(f, " ml::{}<{}>", self.name.0, self.version)?;
+		Ok(())
 	}
 }

core/src/sql/v2/statements/remove/namespace.rs

@@ -10,9 +10,11 @@ use std::fmt::{self, Display, Formatter};
 
 #[derive(Clone, Debug, Default, Eq, PartialEq, PartialOrd, Serialize, Deserialize, Store, Hash)]
 #[cfg_attr(feature = "arbitrary", derive(arbitrary::Arbitrary))]
-#[revisioned(revision = 1)]
+#[revisioned(revision = 2)]
 pub struct RemoveNamespaceStatement {
 	pub name: Ident,
+	#[revision(start = 2)]
+	pub if_exists: bool,
 }
 
 impl RemoveNamespaceStatement {
@@ -23,26 +25,42 @@ impl RemoveNamespaceStatement {
 		opt: &Options,
 		txn: &Transaction,
 	) -> Result<Value, Error> {
-		// Allowed to run?
+		match async {
-		opt.is_allowed(Action::Edit, ResourceKind::Namespace, &Base::Root)?;
+			// Allowed to run?
-		// Claim transaction
+			opt.is_allowed(Action::Edit, ResourceKind::Namespace, &Base::Root)?;
-		let mut run = txn.lock().await;
+			// Claim transaction
-		ctx.get_index_stores().namespace_removed(opt, &mut run).await?;
+			let mut run = txn.lock().await;
-		// Clear the cache
+			ctx.get_index_stores().namespace_removed(opt, &mut run).await?;
-		run.clear_cache();
+			// Clear the cache
-		// Delete the definition
+			run.clear_cache();
-		let key = crate::key::root::ns::new(&self.name);
+			// Get the definition
-		run.del(key).await?;
+			let ns = run.get_ns(&self.name).await?;
-		// Delete the resource data
+			// Delete the definition
-		let key = crate::key::namespace::all::new(&self.name);
+			let key = crate::key::root::ns::new(&ns.name);
-		run.delp(key, u32::MAX).await?;
+			run.del(key).await?;
-		// Ok all good
+			// Delete the resource data
-		Ok(Value::None)
+			let key = crate::key::namespace::all::new(&ns.name);
+			run.delp(key, u32::MAX).await?;
+			// Ok all good
+			Ok(Value::None)
+		}
+		.await
+		{
+			Err(Error::NsNotFound {
+				..
+			}) if self.if_exists => Ok(Value::None),
+			v => v,
+		}
 	}
 }
 
 impl Display for RemoveNamespaceStatement {
 	fn fmt(&self, f: &mut Formatter) -> fmt::Result {
-		write!(f, "REMOVE NAMESPACE {}", self.name)
+		write!(f, "REMOVE NAMESPACE")?;
+		if self.if_exists {
+			write!(f, " IF EXISTS")?
+		}
+		write!(f, " {}", self.name)?;
+		Ok(())
 	}
 }

core/src/sql/v2/statements/remove/param.rs

@@ -9,10 +9,12 @@ use serde::{Deserialize, Serialize};
 use std::fmt::{self, Display, Formatter};
 
 #[derive(Clone, Debug, Default, Eq, PartialEq, PartialOrd, Serialize, Deserialize, Store, Hash)]
-#[revisioned(revision = 1)]
+#[revisioned(revision = 2)]
 #[cfg_attr(feature = "arbitrary", derive(arbitrary::Arbitrary))]
 pub struct RemoveParamStatement {
 	pub name: Ident,
+	#[revision(start = 2)]
+	pub if_exists: bool,
 }
 
 impl RemoveParamStatement {
@@ -23,22 +25,38 @@ impl RemoveParamStatement {
 		opt: &Options,
 		txn: &Transaction,
 	) -> Result<Value, Error> {
-		// Allowed to run?
+		match async {
-		opt.is_allowed(Action::Edit, ResourceKind::Parameter, &Base::Db)?;
+			// Allowed to run?
-		// Claim transaction
+			opt.is_allowed(Action::Edit, ResourceKind::Parameter, &Base::Db)?;
-		let mut run = txn.lock().await;
+			// Claim transaction
-		// Clear the cache
+			let mut run = txn.lock().await;
-		run.clear_cache();
+			// Clear the cache
-		// Delete the definition
+			run.clear_cache();
-		let key = crate::key::database::pa::new(opt.ns(), opt.db(), &self.name);
+			// Get the definition
-		run.del(key).await?;
+			let pa = run.get_db_param(opt.ns(), opt.db(), &self.name).await?;
-		// Ok all good
+			// Delete the definition
-		Ok(Value::None)
+			let key = crate::key::database::pa::new(opt.ns(), opt.db(), &pa.name);
+			run.del(key).await?;
+			// Ok all good
+			Ok(Value::None)
+		}
+		.await
+		{
+			Err(Error::PaNotFound {
+				..
+			}) if self.if_exists => Ok(Value::None),
+			v => v,
+		}
 	}
 }
 
 impl Display for RemoveParamStatement {
 	fn fmt(&self, f: &mut Formatter) -> fmt::Result {
-		write!(f, "REMOVE PARAM {}", self.name)
+		write!(f, "REMOVE PARAM")?;
+		if self.if_exists {
+			write!(f, " IF EXISTS")?
+		}
+		write!(f, " ${}", self.name)?;
+		Ok(())
 	}
 }

core/src/sql/v2/statements/remove/scope.rs

@@ -10,9 +10,11 @@ use std::fmt::{self, Display, Formatter};
 
 #[derive(Clone, Debug, Default, Eq, PartialEq, PartialOrd, Serialize, Deserialize, Store, Hash)]
 #[cfg_attr(feature = "arbitrary", derive(arbitrary::Arbitrary))]
-#[revisioned(revision = 1)]
+#[revisioned(revision = 2)]
 pub struct RemoveScopeStatement {
 	pub name: Ident,
+	#[revision(start = 2)]
+	pub if_exists: bool,
 }
 
 impl RemoveScopeStatement {
@@ -23,25 +25,41 @@ impl RemoveScopeStatement {
 		opt: &Options,
 		txn: &Transaction,
 	) -> Result<Value, Error> {
-		// Allowed to run?
+		match async {
-		opt.is_allowed(Action::Edit, ResourceKind::Scope, &Base::Db)?;
+			// Allowed to run?
-		// Claim transaction
+			opt.is_allowed(Action::Edit, ResourceKind::Scope, &Base::Db)?;
-		let mut run = txn.lock().await;
+			// Claim transaction
-		// Clear the cache
+			let mut run = txn.lock().await;
-		run.clear_cache();
+			// Clear the cache
-		// Delete the definition
+			run.clear_cache();
-		let key = crate::key::database::sc::new(opt.ns(), opt.db(), &self.name);
+			// Get the definition
-		run.del(key).await?;
+			let sc = run.get_sc(opt.ns(), opt.db(), &self.name).await?;
-		// Remove the resource data
+			// Delete the definition
-		let key = crate::key::scope::all::new(opt.ns(), opt.db(), &self.name);
+			let key = crate::key::database::sc::new(opt.ns(), opt.db(), &sc.name);
-		run.delp(key, u32::MAX).await?;
+			run.del(key).await?;
-		// Ok all good
+			// Remove the resource data
-		Ok(Value::None)
+			let key = crate::key::scope::all::new(opt.ns(), opt.db(), &sc.name);
+			run.delp(key, u32::MAX).await?;
+			// Ok all good
+			Ok(Value::None)
+		}
+		.await
+		{
+			Err(Error::ScNotFound {
+				..
+			}) if self.if_exists => Ok(Value::None),
+			v => v,
+		}
 	}
 }
 
 impl Display for RemoveScopeStatement {
 	fn fmt(&self, f: &mut Formatter) -> fmt::Result {
-		write!(f, "REMOVE SCOPE {}", self.name)
+		write!(f, "REMOVE SCOPE")?;
+		if self.if_exists {
+			write!(f, " IF EXISTS")?
+		}
+		write!(f, " {}", self.name)?;
+		Ok(())
 	}
 }

core/src/sql/v2/statements/remove/table.rs

@@ -26,52 +26,52 @@ impl RemoveTableStatement {
 		opt: &Options,
 		txn: &Transaction,
 	) -> Result<Value, Error> {
-		// Allowed to run?
+		match async {
-		opt.is_allowed(Action::Edit, ResourceKind::Table, &Base::Db)?;
+			// Allowed to run?
-		// Claim transaction
+			opt.is_allowed(Action::Edit, ResourceKind::Table, &Base::Db)?;
-		let mut run = txn.lock().await;
+			// Claim transaction
-		// Remove the index stores
+			let mut run = txn.lock().await;
-		ctx.get_index_stores().table_removed(opt, &mut run, &self.name).await?;
+			// Remove the index stores
-		// Clear the cache
+			ctx.get_index_stores().table_removed(opt, &mut run, &self.name).await?;
-		run.clear_cache();
+			// Clear the cache
-		// Get the defined table
+			run.clear_cache();
-		match run.get_tb(opt.ns(), opt.db(), &self.name).await {
+			// Get the defined table
-			Ok(tb) => {
+			let tb = run.get_tb(opt.ns(), opt.db(), &self.name).await?;
-				// Delete the definition
+			// Delete the definition
-				let key = crate::key::database::tb::new(opt.ns(), opt.db(), &self.name);
+			let key = crate::key::database::tb::new(opt.ns(), opt.db(), &self.name);
-				run.del(key).await?;
+			run.del(key).await?;
-				// Remove the resource data
+			// Remove the resource data
-				let key = crate::key::table::all::new(opt.ns(), opt.db(), &self.name);
+			let key = crate::key::table::all::new(opt.ns(), opt.db(), &self.name);
-				run.delp(key, u32::MAX).await?;
+			run.delp(key, u32::MAX).await?;
-				// Check if this is a foreign table
+			// Check if this is a foreign table
-				if let Some(view) = &tb.view {
+			if let Some(view) = &tb.view {
-					// Process each foreign table
+				// Process each foreign table
-					for v in view.what.0.iter() {
+				for v in view.what.0.iter() {
-						// Save the view config
+					// Save the view config
-						let key = crate::key::table::ft::new(opt.ns(), opt.db(), v, &self.name);
+					let key = crate::key::table::ft::new(opt.ns(), opt.db(), v, &self.name);
-						run.del(key).await?;
+					run.del(key).await?;
-					}
-				}
-				// Ok all good
-				Ok(Value::None)
-			}
-			Err(err) => {
-				if matches!(err, Error::TbNotFound { .. }) && self.if_exists {
-					Ok(Value::None)
-				} else {
-					Err(err)
 				}
 			}
+			// Ok all good
+			Ok(Value::None)
+		}
+		.await
+		{
+			Err(Error::TbNotFound {
+				..
+			}) if self.if_exists => Ok(Value::None),
+			v => v,
 		}
 	}
 }
 
 impl Display for RemoveTableStatement {
 	fn fmt(&self, f: &mut Formatter) -> fmt::Result {
-		write!(f, "REMOVE TABLE {}", self.name)?;
+		write!(f, "REMOVE TABLE")?;
 		if self.if_exists {
 			write!(f, " IF EXISTS")?
 		}
+		write!(f, " {}", self.name)?;
 		Ok(())
 	}
 }

core/src/sql/v2/statements/remove/token.rs

@@ -10,10 +10,12 @@ use std::fmt::{self, Display, Formatter};
 
 #[derive(Clone, Debug, Default, Eq, PartialEq, PartialOrd, Serialize, Deserialize, Store, Hash)]
 #[cfg_attr(feature = "arbitrary", derive(arbitrary::Arbitrary))]
-#[revisioned(revision = 1)]
+#[revisioned(revision = 2)]
 pub struct RemoveTokenStatement {
 	pub name: Ident,
 	pub base: Base,
+	#[revision(start = 2)]
+	pub if_exists: bool,
 }
 
 impl RemoveTokenStatement {
@@ -24,50 +26,79 @@ impl RemoveTokenStatement {
 		opt: &Options,
 		txn: &Transaction,
 	) -> Result<Value, Error> {
-		// Allowed to run?
+		match async {
-		opt.is_allowed(Action::Edit, ResourceKind::Actor, &self.base)?;
+			// Allowed to run?
+			opt.is_allowed(Action::Edit, ResourceKind::Actor, &self.base)?;
 
-		match &self.base {
+			match &self.base {
-			Base::Ns => {
+				Base::Ns => {
-				// Claim transaction
+					// Claim transaction
-				let mut run = txn.lock().await;
+					let mut run = txn.lock().await;
-				// Clear the cache
+					// Clear the cache
-				run.clear_cache();
+					run.clear_cache();
-				// Delete the definition
+					// Get the definition
-				let key = crate::key::namespace::tk::new(opt.ns(), &self.name);
+					let tk = run.get_ns_token(opt.ns(), &self.name).await?;
-				run.del(key).await?;
+					// Delete the definition
-				// Ok all good
+					let key = crate::key::namespace::tk::new(opt.ns(), &tk.name);
-				Ok(Value::None)
+					run.del(key).await?;
+					// Ok all good
+					Ok(Value::None)
+				}
+				Base::Db => {
+					// Claim transaction
+					let mut run = txn.lock().await;
+					// Clear the cache
+					run.clear_cache();
+					// Get the definition
+					let tk = run.get_db_token(opt.ns(), opt.db(), &self.name).await?;
+					// Delete the definition
+					let key = crate::key::database::tk::new(opt.ns(), opt.db(), &tk.name);
+					run.del(key).await?;
+					// Ok all good
+					Ok(Value::None)
+				}
+				Base::Sc(sc) => {
+					// Claim transaction
+					let mut run = txn.lock().await;
+					// Clear the cache
+					run.clear_cache();
+					// Get the definition
+					let tk = run.get_sc_token(opt.ns(), opt.db(), sc, &self.name).await?;
+					// Delete the definition
+					let key = crate::key::scope::tk::new(opt.ns(), opt.db(), sc, &tk.name);
+					run.del(key).await?;
+					// Ok all good
+					Ok(Value::None)
+				}
+				_ => Err(Error::InvalidLevel(self.base.to_string())),
 			}
-			Base::Db => {
+		}
-				// Claim transaction
+		.await
-				let mut run = txn.lock().await;
+		{
-				// Clear the cache
+			Err(e) if self.if_exists => match e {
-				run.clear_cache();
+				Error::NtNotFound {
-				// Delete the definition
+					..
-				let key = crate::key::database::tk::new(opt.ns(), opt.db(), &self.name);
+				} => Ok(Value::None),
-				run.del(key).await?;
+				Error::DtNotFound {
-				// Ok all good
+					..
-				Ok(Value::None)
+				} => Ok(Value::None),
-			}
+				Error::StNotFound {
-			Base::Sc(sc) => {
+					..
-				// Claim transaction
+				} => Ok(Value::None),
-				let mut run = txn.lock().await;
+				e => Err(e),
-				// Clear the cache
+			},
-				run.clear_cache();
+			v => v,
-				// Delete the definition
-				let key = crate::key::scope::tk::new(opt.ns(), opt.db(), sc, &self.name);
-				run.del(key).await?;
-				// Ok all good
-				Ok(Value::None)
-			}
-			_ => Err(Error::InvalidLevel(self.base.to_string())),
 		}
 	}
 }
 
 impl Display for RemoveTokenStatement {
 	fn fmt(&self, f: &mut Formatter) -> fmt::Result {
-		write!(f, "REMOVE TOKEN {} ON {}", self.name, self.base)
+		write!(f, "REMOVE TOKEN")?;
+		if self.if_exists {
+			write!(f, " IF EXISTS")?
+		}
+		write!(f, " {} ON {}", self.name, self.base)?;
+		Ok(())
 	}
 }

core/src/sql/v2/statements/remove/user.rs

@@ -9,11 +9,13 @@ use serde::{Deserialize, Serialize};
 use std::fmt::{self, Display, Formatter};
 
 #[derive(Clone, Debug, Default, Eq, PartialEq, PartialOrd, Serialize, Deserialize, Store, Hash)]
-#[revisioned(revision = 1)]
+#[revisioned(revision = 2)]
 #[cfg_attr(feature = "arbitrary", derive(arbitrary::Arbitrary))]
 pub struct RemoveUserStatement {
 	pub name: Ident,
 	pub base: Base,
+	#[revision(start = 2)]
+	pub if_exists: bool,
 }
 
 impl RemoveUserStatement {
@@ -24,50 +26,79 @@ impl RemoveUserStatement {
 		opt: &Options,
 		txn: &Transaction,
 	) -> Result<Value, Error> {
-		// Allowed to run?
+		match async {
-		opt.is_allowed(Action::Edit, ResourceKind::Actor, &self.base)?;
+			// Allowed to run?
+			opt.is_allowed(Action::Edit, ResourceKind::Actor, &self.base)?;
 
-		match self.base {
+			match self.base {
-			Base::Root => {
+				Base::Root => {
-				// Claim transaction
+					// Claim transaction
-				let mut run = txn.lock().await;
+					let mut run = txn.lock().await;
-				// Clear the cache
+					// Clear the cache
-				run.clear_cache();
+					run.clear_cache();
-				// Process the statement
+					// Get the definition
-				let key = crate::key::root::us::new(&self.name);
+					let us = run.get_root_user(&self.name).await?;
-				run.del(key).await?;
+					// Process the statement
-				// Ok all good
+					let key = crate::key::root::us::new(&us.name);
-				Ok(Value::None)
+					run.del(key).await?;
+					// Ok all good
+					Ok(Value::None)
+				}
+				Base::Ns => {
+					// Claim transaction
+					let mut run = txn.lock().await;
+					// Clear the cache
+					run.clear_cache();
+					// Get the definition
+					let us = run.get_ns_user(opt.ns(), &self.name).await?;
+					// Delete the definition
+					let key = crate::key::namespace::us::new(opt.ns(), &us.name);
+					run.del(key).await?;
+					// Ok all good
+					Ok(Value::None)
+				}
+				Base::Db => {
+					// Claim transaction
+					let mut run = txn.lock().await;
+					// Clear the cache
+					run.clear_cache();
+					// Get the definition
+					let us = run.get_db_user(opt.ns(), opt.db(), &self.name).await?;
+					// Delete the definition
+					let key = crate::key::database::us::new(opt.ns(), opt.db(), &us.name);
+					run.del(key).await?;
+					// Ok all good
+					Ok(Value::None)
+				}
+				_ => Err(Error::InvalidLevel(self.base.to_string())),
 			}
-			Base::Ns => {
+		}
-				// Claim transaction
+		.await
-				let mut run = txn.lock().await;
+		{
-				// Clear the cache
+			Err(e) if self.if_exists => match e {
-				run.clear_cache();
+				Error::UserRootNotFound {
-				// Delete the definition
+					..
-				let key = crate::key::namespace::us::new(opt.ns(), &self.name);
+				} => Ok(Value::None),
-				run.del(key).await?;
+				Error::UserNsNotFound {
-				// Ok all good
+					..
-				Ok(Value::None)
+				} => Ok(Value::None),
-			}
+				Error::UserDbNotFound {
-			Base::Db => {
+					..
-				// Claim transaction
+				} => Ok(Value::None),
-				let mut run = txn.lock().await;
+				e => Err(e),
-				// Clear the cache
+			},
-				run.clear_cache();
+			v => v,
-				// Delete the definition
-				let key = crate::key::database::us::new(opt.ns(), opt.db(), &self.name);
-				run.del(key).await?;
-				// Ok all good
-				Ok(Value::None)
-			}
-			_ => Err(Error::InvalidLevel(self.base.to_string())),
 		}
 	}
 }
 
 impl Display for RemoveUserStatement {
 	fn fmt(&self, f: &mut Formatter) -> fmt::Result {
-		write!(f, "REMOVE USER {} ON {}", self.name, self.base)
+		write!(f, "REMOVE USER")?;
+		if self.if_exists {
+			write!(f, " IF EXISTS")?
+		}
+		write!(f, " {} ON {}", self.name, self.base)?;
+		Ok(())
 	}
 }

core/src/sql/v2/value/serde/ser/statement/remove/analyzer.rs

@@ -36,6 +36,7 @@ impl ser::Serializer for Serializer {
 #[derive(Default)]
 pub struct SerializeRemoveAnalyzerStatement {
 	name: Ident,
+	if_exists: bool,
 }
 
 impl serde::ser::SerializeStruct for SerializeRemoveAnalyzerStatement {
@@ -50,6 +51,9 @@ impl serde::ser::SerializeStruct for SerializeRemoveAnalyzerStatement {
 			"name" => {
 				self.name = Ident(value.serialize(ser::string::Serializer.wrap())?);
 			}
+			"if_exists" => {
+				self.if_exists = value.serialize(ser::primitive::bool::Serializer.wrap())?
+			}
 			key => {
 				return Err(Error::custom(format!(
 					"unexpected field `RemoveAnalyzerStatement::{key}`"
@@ -62,6 +66,7 @@ impl serde::ser::SerializeStruct for SerializeRemoveAnalyzerStatement {
 	fn end(self) -> Result<Self::Ok, Error> {
 		Ok(RemoveAnalyzerStatement {
 			name: self.name,
+			if_exists: self.if_exists,
 		})
 	}
 }

core/src/sql/v2/value/serde/ser/statement/remove/database.rs

@@ -36,6 +36,7 @@ impl ser::Serializer for Serializer {
 #[derive(Default)]
 pub struct SerializeRemoveDatabaseStatement {
 	name: Ident,
+	if_exists: bool,
 }
 
 impl serde::ser::SerializeStruct for SerializeRemoveDatabaseStatement {
@@ -50,6 +51,9 @@ impl serde::ser::SerializeStruct for SerializeRemoveDatabaseStatement {
 			"name" => {
 				self.name = Ident(value.serialize(ser::string::Serializer.wrap())?);
 			}
+			"if_exists" => {
+				self.if_exists = value.serialize(ser::primitive::bool::Serializer.wrap())?
+			}
 			key => {
 				return Err(Error::custom(format!(
 					"unexpected field `RemoveDatabaseStatement::{key}`"
@@ -62,6 +66,7 @@ impl serde::ser::SerializeStruct for SerializeRemoveDatabaseStatement {
 	fn end(self) -> Result<Self::Ok, Error> {
 		Ok(RemoveDatabaseStatement {
 			name: self.name,
+			if_exists: self.if_exists,
 		})
 	}
 }

core/src/sql/v2/value/serde/ser/statement/remove/event.rs

@@ -37,6 +37,7 @@ impl ser::Serializer for Serializer {
 pub struct SerializeRemoveEventStatement {
 	name: Ident,
 	what: Ident,
+	if_exists: bool,
 }
 
 impl serde::ser::SerializeStruct for SerializeRemoveEventStatement {
@@ -54,6 +55,9 @@ impl serde::ser::SerializeStruct for SerializeRemoveEventStatement {
 			"what" => {
 				self.what = Ident(value.serialize(ser::string::Serializer.wrap())?);
 			}
+			"if_exists" => {
+				self.if_exists = value.serialize(ser::primitive::bool::Serializer.wrap())?
+			}
 			key => {
 				return Err(Error::custom(format!(
 					"unexpected field `RemoveEventStatement::{key}`"
@@ -67,6 +71,7 @@ impl serde::ser::SerializeStruct for SerializeRemoveEventStatement {
 		Ok(RemoveEventStatement {
 			name: self.name,
 			what: self.what,
+			if_exists: self.if_exists,
 		})
 	}
 }

core/src/sql/v2/value/serde/ser/statement/remove/field.rs

@@ -38,6 +38,7 @@ impl ser::Serializer for Serializer {
 pub struct SerializeRemoveFieldStatement {
 	name: Idiom,
 	what: Ident,
+	if_exists: bool,
 }
 
 impl serde::ser::SerializeStruct for SerializeRemoveFieldStatement {
@@ -55,6 +56,9 @@ impl serde::ser::SerializeStruct for SerializeRemoveFieldStatement {
 			"what" => {
 				self.what = Ident(value.serialize(ser::string::Serializer.wrap())?);
 			}
+			"if_exists" => {
+				self.if_exists = value.serialize(ser::primitive::bool::Serializer.wrap())?
+			}
 			key => {
 				return Err(Error::custom(format!(
 					"unexpected field `RemoveFieldStatement::{key}`"
@@ -68,6 +72,7 @@ impl serde::ser::SerializeStruct for SerializeRemoveFieldStatement {
 		Ok(RemoveFieldStatement {
 			name: self.name,
 			what: self.what,
+			if_exists: self.if_exists,
 		})
 	}
 }

core/src/sql/v2/value/serde/ser/statement/remove/function.rs

@@ -36,6 +36,7 @@ impl ser::Serializer for Serializer {
 #[derive(Default)]
 pub struct SerializeRemoveFunctionStatement {
 	name: Ident,
+	if_exists: bool,
 }
 
 impl serde::ser::SerializeStruct for SerializeRemoveFunctionStatement {
@@ -50,6 +51,9 @@ impl serde::ser::SerializeStruct for SerializeRemoveFunctionStatement {
 			"name" => {
 				self.name = Ident(value.serialize(ser::string::Serializer.wrap())?);
 			}
+			"if_exists" => {
+				self.if_exists = value.serialize(ser::primitive::bool::Serializer.wrap())?;
+			}
 			key => {
 				return Err(Error::custom(format!(
 					"unexpected field `RemoveFunctionStatement::{key}`"
@@ -62,6 +66,7 @@ impl serde::ser::SerializeStruct for SerializeRemoveFunctionStatement {
 	fn end(self) -> Result<Self::Ok, Error> {
 		Ok(RemoveFunctionStatement {
 			name: self.name,
+			if_exists: self.if_exists,
 		})
 	}
 }

core/src/sql/v2/value/serde/ser/statement/remove/index.rs

@@ -37,6 +37,7 @@ impl ser::Serializer for Serializer {
 pub struct SerializeRemoveIndexStatement {
 	name: Ident,
 	what: Ident,
+	if_exists: bool,
 }
 
 impl serde::ser::SerializeStruct for SerializeRemoveIndexStatement {
@@ -54,6 +55,9 @@ impl serde::ser::SerializeStruct for SerializeRemoveIndexStatement {
 			"what" => {
 				self.what = Ident(value.serialize(ser::string::Serializer.wrap())?);
 			}
+			"if_exists" => {
+				self.if_exists = value.serialize(ser::primitive::bool::Serializer.wrap())?;
+			}
 			key => {
 				return Err(Error::custom(format!(
 					"unexpected field `RemoveIndexStatement::{key}`"
@@ -67,6 +71,7 @@ impl serde::ser::SerializeStruct for SerializeRemoveIndexStatement {
 		Ok(RemoveIndexStatement {
 			name: self.name,
 			what: self.what,
+			if_exists: self.if_exists,
 		})
 	}
 }

core/src/sql/v2/value/serde/ser/statement/remove/namespace.rs

@@ -36,6 +36,7 @@ impl ser::Serializer for Serializer {
 #[derive(Default)]
 pub struct SerializeRemoveNamespaceStatement {
 	name: Ident,
+	if_exists: bool,
 }
 
 impl serde::ser::SerializeStruct for SerializeRemoveNamespaceStatement {
@@ -50,6 +51,9 @@ impl serde::ser::SerializeStruct for SerializeRemoveNamespaceStatement {
 			"name" => {
 				self.name = Ident(value.serialize(ser::string::Serializer.wrap())?);
 			}
+			"if_exists" => {
+				self.if_exists = value.serialize(ser::primitive::bool::Serializer.wrap())?;
+			}
 			key => {
 				return Err(Error::custom(format!(
 					"unexpected field `RemoveNamespaceStatement::{key}`"
@@ -62,6 +66,7 @@ impl serde::ser::SerializeStruct for SerializeRemoveNamespaceStatement {
 	fn end(self) -> Result<Self::Ok, Error> {
 		Ok(RemoveNamespaceStatement {
 			name: self.name,
+			if_exists: self.if_exists,
 		})
 	}
 }

core/src/sql/v2/value/serde/ser/statement/remove/param.rs

@@ -36,6 +36,7 @@ impl ser::Serializer for Serializer {
 #[derive(Default)]
 pub struct SerializeRemoveParamStatement {
 	name: Ident,
+	if_exists: bool,
 }
 
 impl serde::ser::SerializeStruct for SerializeRemoveParamStatement {
@@ -50,6 +51,9 @@ impl serde::ser::SerializeStruct for SerializeRemoveParamStatement {
 			"name" => {
 				self.name = Ident(value.serialize(ser::string::Serializer.wrap())?);
 			}
+			"if_exists" => {
+				self.if_exists = value.serialize(ser::primitive::bool::Serializer.wrap())?;
+			}
 			key => {
 				return Err(Error::custom(format!(
 					"unexpected field `RemoveParamStatement::{key}`"
@@ -62,6 +66,7 @@ impl serde::ser::SerializeStruct for SerializeRemoveParamStatement {
 	fn end(self) -> Result<Self::Ok, Error> {
 		Ok(RemoveParamStatement {
 			name: self.name,
+			if_exists: self.if_exists,
 		})
 	}
 }

core/src/sql/v2/value/serde/ser/statement/remove/scope.rs

@@ -36,6 +36,7 @@ impl ser::Serializer for Serializer {
 #[derive(Default)]
 pub struct SerializeRemoveScopeStatement {
 	name: Ident,
+	if_exists: bool,
 }
 
 impl serde::ser::SerializeStruct for SerializeRemoveScopeStatement {
@@ -50,6 +51,9 @@ impl serde::ser::SerializeStruct for SerializeRemoveScopeStatement {
 			"name" => {
 				self.name = Ident(value.serialize(ser::string::Serializer.wrap())?);
 			}
+			"if_exists" => {
+				self.if_exists = value.serialize(ser::primitive::bool::Serializer.wrap())?;
+			}
 			key => {
 				return Err(Error::custom(format!(
 					"unexpected field `RemoveScopeStatement::{key}`"
@@ -62,6 +66,7 @@ impl serde::ser::SerializeStruct for SerializeRemoveScopeStatement {
 	fn end(self) -> Result<Self::Ok, Error> {
 		Ok(RemoveScopeStatement {
 			name: self.name,
+			if_exists: self.if_exists,
 		})
 	}
 }

core/src/sql/v2/value/serde/ser/statement/remove/token.rs

@@ -38,6 +38,7 @@ impl ser::Serializer for Serializer {
 pub struct SerializeRemoveTokenStatement {
 	name: Ident,
 	base: Base,
+	if_exists: bool,
 }
 
 impl serde::ser::SerializeStruct for SerializeRemoveTokenStatement {
@@ -55,6 +56,9 @@ impl serde::ser::SerializeStruct for SerializeRemoveTokenStatement {
 			"base" => {
 				self.base = value.serialize(ser::base::Serializer.wrap())?;
 			}
+			"if_exists" => {
+				self.if_exists = value.serialize(ser::primitive::bool::Serializer.wrap())?;
+			}
 			key => {
 				return Err(Error::custom(format!(
 					"unexpected field `RemoveTokenStatement::{key}`"
@@ -68,6 +72,7 @@ impl serde::ser::SerializeStruct for SerializeRemoveTokenStatement {
 		Ok(RemoveTokenStatement {
 			name: self.name,
 			base: self.base,
+			if_exists: self.if_exists,
 		})
 	}
 }

core/src/sql/v2/value/serde/ser/statement/remove/user.rs

@@ -38,6 +38,7 @@ impl ser::Serializer for Serializer {
 pub struct SerializeRemoveUserStatement {
 	name: Ident,
 	base: Base,
+	if_exists: bool,
 }
 
 impl serde::ser::SerializeStruct for SerializeRemoveUserStatement {
@@ -55,6 +56,9 @@ impl serde::ser::SerializeStruct for SerializeRemoveUserStatement {
 			"base" => {
 				self.base = value.serialize(ser::base::Serializer.wrap())?;
 			}
+			"if_exists" => {
+				self.if_exists = value.serialize(ser::primitive::bool::Serializer.wrap())?;
+			}
 			key => {
 				return Err(Error::custom(format!(
 					"unexpected field `RemoveUserStatement::{key}`"
@@ -68,6 +72,7 @@ impl serde::ser::SerializeStruct for SerializeRemoveUserStatement {
 		Ok(RemoveUserStatement {
 			name: self.name,
 			base: self.base,
+			if_exists: self.if_exists,
 		})
 	}
 }

core/src/syn/v1/stmt/remove.rs

@@ -41,30 +41,52 @@ pub fn remove(i: &str) -> IResult<&str, RemoveStatement> {
 
 pub fn analyzer(i: &str) -> IResult<&str, RemoveAnalyzerStatement> {
 	let (i, _) = tag_no_case("ANALYZER")(i)?;
+	#[cfg(feature = "sql2")]
+	let (i, if_exists) = opt(tuple((
+		shouldbespace,
+		tag_no_case("IF"),
+		cut(tuple((shouldbespace, tag_no_case("EXISTS")))),
+	)))(i)?;
 	let (i, _) = shouldbespace(i)?;
 	let (i, name) = cut(ident)(i)?;
 	Ok((
 		i,
 		RemoveAnalyzerStatement {
 			name,
+			#[cfg(feature = "sql2")]
+			if_exists: if_exists.is_some(),
 		},
 	))
 }
 
 pub fn database(i: &str) -> IResult<&str, RemoveDatabaseStatement> {
 	let (i, _) = alt((tag_no_case("DB"), tag_no_case("DATABASE")))(i)?;
+	#[cfg(feature = "sql2")]
+	let (i, if_exists) = opt(tuple((
+		shouldbespace,
+		tag_no_case("IF"),
+		cut(tuple((shouldbespace, tag_no_case("EXISTS")))),
+	)))(i)?;
 	let (i, _) = shouldbespace(i)?;
 	let (i, name) = cut(ident)(i)?;
 	Ok((
 		i,
 		RemoveDatabaseStatement {
 			name,
+			#[cfg(feature = "sql2")]
+			if_exists: if_exists.is_some(),
 		},
 	))
 }
 
 pub fn event(i: &str) -> IResult<&str, RemoveEventStatement> {
 	let (i, _) = tag_no_case("EVENT")(i)?;
+	#[cfg(feature = "sql2")]
+	let (i, if_exists) = opt(tuple((
+		shouldbespace,
+		tag_no_case("IF"),
+		cut(tuple((shouldbespace, tag_no_case("EXISTS")))),
+	)))(i)?;
 	let (i, _) = shouldbespace(i)?;
 	let (i, name) = cut(ident)(i)?;
 	let (i, _) = shouldbespace(i)?;
@@ -77,12 +99,20 @@ pub fn event(i: &str) -> IResult<&str, RemoveEventStatement> {
 		RemoveEventStatement {
 			name,
 			what,
+			#[cfg(feature = "sql2")]
+			if_exists: if_exists.is_some(),
 		},
 	))
 }
 
 pub fn field(i: &str) -> IResult<&str, RemoveFieldStatement> {
 	let (i, _) = tag_no_case("FIELD")(i)?;
+	#[cfg(feature = "sql2")]
+	let (i, if_exists) = opt(tuple((
+		shouldbespace,
+		tag_no_case("IF"),
+		cut(tuple((shouldbespace, tag_no_case("EXISTS")))),
+	)))(i)?;
 	let (i, _) = shouldbespace(i)?;
 	let (i, name) = cut(idiom::local)(i)?;
 	let (i, _) = shouldbespace(i)?;
@@ -95,12 +125,20 @@ pub fn field(i: &str) -> IResult<&str, RemoveFieldStatement> {
 		RemoveFieldStatement {
 			name,
 			what,
+			#[cfg(feature = "sql2")]
+			if_exists: if_exists.is_some(),
 		},
 	))
 }
 
 pub fn function(i: &str) -> IResult<&str, RemoveFunctionStatement> {
 	let (i, _) = tag_no_case("FUNCTION")(i)?;
+	#[cfg(feature = "sql2")]
+	let (i, if_exists) = opt(tuple((
+		shouldbespace,
+		tag_no_case("IF"),
+		cut(tuple((shouldbespace, tag_no_case("EXISTS")))),
+	)))(i)?;
 	let (i, _) = shouldbespace(i)?;
 	let (i, _) = tag("fn::")(i)?;
 	let (i, name) = ident_path(i)?;
@@ -115,12 +153,20 @@ pub fn function(i: &str) -> IResult<&str, RemoveFunctionStatement> {
 		i,
 		RemoveFunctionStatement {
 			name,
+			#[cfg(feature = "sql2")]
+			if_exists: if_exists.is_some(),
 		},
 	))
 }
 
 pub fn index(i: &str) -> IResult<&str, RemoveIndexStatement> {
 	let (i, _) = tag_no_case("INDEX")(i)?;
+	#[cfg(feature = "sql2")]
+	let (i, if_exists) = opt(tuple((
+		shouldbespace,
+		tag_no_case("IF"),
+		cut(tuple((shouldbespace, tag_no_case("EXISTS")))),
+	)))(i)?;
 	let (i, _) = shouldbespace(i)?;
 	let (i, name) = cut(ident)(i)?;
 	let (i, _) = shouldbespace(i)?;
@@ -133,24 +179,40 @@ pub fn index(i: &str) -> IResult<&str, RemoveIndexStatement> {
 		RemoveIndexStatement {
 			name,
 			what,
+			#[cfg(feature = "sql2")]
+			if_exists: if_exists.is_some(),
 		},
 	))
 }
 
 pub fn namespace(i: &str) -> IResult<&str, RemoveNamespaceStatement> {
 	let (i, _) = alt((tag_no_case("NS"), tag_no_case("NAMESPACE")))(i)?;
+	#[cfg(feature = "sql2")]
+	let (i, if_exists) = opt(tuple((
+		shouldbespace,
+		tag_no_case("IF"),
+		cut(tuple((shouldbespace, tag_no_case("EXISTS")))),
+	)))(i)?;
 	let (i, _) = shouldbespace(i)?;
 	let (i, name) = cut(ident)(i)?;
 	Ok((
 		i,
 		RemoveNamespaceStatement {
 			name,
+			#[cfg(feature = "sql2")]
+			if_exists: if_exists.is_some(),
 		},
 	))
 }
 
 pub fn param(i: &str) -> IResult<&str, RemoveParamStatement> {
 	let (i, _) = tag_no_case("PARAM")(i)?;
+	#[cfg(feature = "sql2")]
+	let (i, if_exists) = opt(tuple((
+		shouldbespace,
+		tag_no_case("IF"),
+		cut(tuple((shouldbespace, tag_no_case("EXISTS")))),
+	)))(i)?;
 	let (i, _) = shouldbespace(i)?;
 	let (i, _) = cut(char('$'))(i)?;
 	let (i, name) = cut(ident)(i)?;
@@ -158,32 +220,42 @@ pub fn param(i: &str) -> IResult<&str, RemoveParamStatement> {
 		i,
 		RemoveParamStatement {
 			name,
+			#[cfg(feature = "sql2")]
+			if_exists: if_exists.is_some(),
 		},
 	))
 }
 
 pub fn scope(i: &str) -> IResult<&str, RemoveScopeStatement> {
 	let (i, _) = tag_no_case("SCOPE")(i)?;
-	let (i, _) = shouldbespace(i)?;
-	let (i, name) = cut(ident)(i)?;
-	Ok((
-		i,
-		RemoveScopeStatement {
-			name,
-		},
-	))
-}
-
-pub fn table(i: &str) -> IResult<&str, RemoveTableStatement> {
-	let (i, _) = tag_no_case("TABLE")(i)?;
-	let (i, _) = shouldbespace(i)?;
-	let (i, name) = cut(ident)(i)?;
 	#[cfg(feature = "sql2")]
 	let (i, if_exists) = opt(tuple((
 		shouldbespace,
 		tag_no_case("IF"),
 		cut(tuple((shouldbespace, tag_no_case("EXISTS")))),
 	)))(i)?;
+	let (i, _) = shouldbespace(i)?;
+	let (i, name) = cut(ident)(i)?;
+	Ok((
+		i,
+		RemoveScopeStatement {
+			name,
+			#[cfg(feature = "sql2")]
+			if_exists: if_exists.is_some(),
+		},
+	))
+}
+
+pub fn table(i: &str) -> IResult<&str, RemoveTableStatement> {
+	let (i, _) = tag_no_case("TABLE")(i)?;
+	#[cfg(feature = "sql2")]
+	let (i, if_exists) = opt(tuple((
+		shouldbespace,
+		tag_no_case("IF"),
+		cut(tuple((shouldbespace, tag_no_case("EXISTS")))),
+	)))(i)?;
+	let (i, _) = shouldbespace(i)?;
+	let (i, name) = cut(ident)(i)?;
 	Ok((
 		i,
 		RemoveTableStatement {
@@ -196,6 +268,12 @@ pub fn table(i: &str) -> IResult<&str, RemoveTableStatement> {
 
 pub fn token(i: &str) -> IResult<&str, RemoveTokenStatement> {
 	let (i, _) = tag_no_case("TOKEN")(i)?;
+	#[cfg(feature = "sql2")]
+	let (i, if_exists) = opt(tuple((
+		shouldbespace,
+		tag_no_case("IF"),
+		cut(tuple((shouldbespace, tag_no_case("EXISTS")))),
+	)))(i)?;
 	let (i, _) = shouldbespace(i)?;
 	let (i, name) = cut(ident)(i)?;
 	let (i, _) = shouldbespace(i)?;
@@ -207,12 +285,20 @@ pub fn token(i: &str) -> IResult<&str, RemoveTokenStatement> {
 		RemoveTokenStatement {
 			name,
 			base,
+			#[cfg(feature = "sql2")]
+			if_exists: if_exists.is_some(),
 		},
 	))
 }
 
 pub fn user(i: &str) -> IResult<&str, RemoveUserStatement> {
 	let (i, _) = tag_no_case("USER")(i)?;
+	#[cfg(feature = "sql2")]
+	let (i, if_exists) = opt(tuple((
+		shouldbespace,
+		tag_no_case("IF"),
+		cut(tuple((shouldbespace, tag_no_case("EXISTS")))),
+	)))(i)?;
 	let (i, _) = shouldbespace(i)?;
 	let (i, name) = cut(ident)(i)?;
 	let (i, _) = shouldbespace(i)?;
@@ -224,6 +310,8 @@ pub fn user(i: &str) -> IResult<&str, RemoveUserStatement> {
 		RemoveUserStatement {
 			name,
 			base,
+			#[cfg(feature = "sql2")]
+			if_exists: if_exists.is_some(),
 		},
 	))
 }
@@ -238,9 +326,149 @@ mod tests {
 	fn check_remove_serialize() {
 		let stm = RemoveStatement::Namespace(RemoveNamespaceStatement {
 			name: Ident::from("test"),
+			#[cfg(feature = "sql2")]
+			if_exists: false,
 		});
 		let enc: Vec<u8> = stm.try_into().unwrap();
+		#[cfg(not(feature = "sql2"))]
 		assert_eq!(9, enc.len());
+		#[cfg(feature = "sql2")]
+		assert_eq!(10, enc.len());
+	}
+
+	/// REMOVE ANALYZER tests
+
+	#[test]
+	fn remove_analyzer() {
+		let sql = "REMOVE ANALYZER test";
+		let res = remove(sql);
+		let out = res.unwrap().1;
+		assert_eq!("REMOVE ANALYZER test", format!("{}", out))
+	}
+
+	#[test]
+	#[cfg(feature = "sql2")]
+	fn remove_analyzer_if_exists() {
+		let sql = "REMOVE ANALYZER IF EXISTS test";
+		let res = remove(sql);
+		let out = res.unwrap().1;
+		assert_eq!("REMOVE ANALYZER IF EXISTS test", format!("{}", out))
+	}
+
+	#[test]
+	#[cfg(feature = "sql2")]
+	fn remove_analyzer_if() {
+		let sql = "REMOVE ANALYZER IF test";
+		let res = remove(sql);
+		assert!(res.is_err());
+	}
+
+	/// REMOVE DATABASE tests
+
+	#[test]
+	fn remove_database() {
+		let sql = "REMOVE DATABASE test";
+		let res = remove(sql);
+		let out = res.unwrap().1;
+		assert_eq!("REMOVE DATABASE test", format!("{}", out))
+	}
+
+	#[test]
+	#[cfg(feature = "sql2")]
+	fn remove_database_if_exists() {
+		let sql = "REMOVE DATABASE IF EXISTS test";
+		let res = remove(sql);
+		let out = res.unwrap().1;
+		assert_eq!("REMOVE DATABASE IF EXISTS test", format!("{}", out))
+	}
+
+	#[test]
+	#[cfg(feature = "sql2")]
+	fn remove_database_if() {
+		let sql = "REMOVE DATABASE IF test";
+		let res = remove(sql);
+		assert!(res.is_err());
+	}
+
+	/// REMOVE EVENT tests
+
+	#[test]
+	fn remove_event() {
+		let sql = "REMOVE EVENT test ON test";
+		let res = remove(sql);
+		let out = res.unwrap().1;
+		assert_eq!("REMOVE EVENT test ON test", format!("{}", out))
+	}
+
+	#[test]
+	#[cfg(feature = "sql2")]
+	fn remove_event_if_exists() {
+		let sql = "REMOVE EVENT IF EXISTS test ON test";
+		let res = remove(sql);
+		let out = res.unwrap().1;
+		assert_eq!("REMOVE EVENT IF EXISTS test ON test", format!("{}", out))
+	}
+
+	#[test]
+	#[cfg(feature = "sql2")]
+	fn remove_event_if() {
+		let sql = "REMOVE EVENT IF test ON test";
+		let res = remove(sql);
+		assert!(res.is_err());
+	}
+
+	/// REMOVE FIELD tests
+
+	#[test]
+	fn remove_field() {
+		let sql = "REMOVE FIELD test ON test";
+		let res = remove(sql);
+		let out = res.unwrap().1;
+		assert_eq!("REMOVE FIELD test ON test", format!("{}", out))
+	}
+
+	#[test]
+	#[cfg(feature = "sql2")]
+	fn remove_field_if_exists() {
+		let sql = "REMOVE FIELD IF EXISTS test ON test";
+		let res = remove(sql);
+		let out = res.unwrap().1;
+		assert_eq!("REMOVE FIELD IF EXISTS test ON test", format!("{}", out))
+	}
+
+	#[test]
+	#[cfg(feature = "sql2")]
+	fn remove_field_if() {
+		let sql = "REMOVE FIELD IF test ON test";
+		let res = remove(sql);
+		assert!(res.is_err());
+	}
+
+	/// REMOVE FUNCTION tests
+
+	#[test]
+	fn remove_function() {
+		let sql = "REMOVE FUNCTION fn::test";
+		let res = remove(sql);
+		let out = res.unwrap().1;
+		assert_eq!("REMOVE FUNCTION fn::test", format!("{}", out))
+	}
+
+	#[test]
+	#[cfg(feature = "sql2")]
+	fn remove_function_if_exists() {
+		let sql = "REMOVE FUNCTION IF EXISTS fn::test";
+		let res = remove(sql);
+		let out = res.unwrap().1;
+		assert_eq!("REMOVE FUNCTION IF EXISTS fn::test", format!("{}", out))
+	}
+
+	#[test]
+	#[cfg(feature = "sql2")]
+	fn remove_function_if() {
+		let sql = "REMOVE FUNCTION IF fn::test";
+		let res = remove(sql);
+		assert!(res.is_err());
 	}
 
 	#[test]
@@ -251,6 +479,116 @@ mod tests {
 		assert_eq!("REMOVE FUNCTION fn::foo::bar::baz::bac", format!("{}", out))
 	}
 
+	/// REMOVE INDEX tests
+
+	#[test]
+	fn remove_index() {
+		let sql = "REMOVE INDEX test ON test";
+		let res = remove(sql);
+		let out = res.unwrap().1;
+		assert_eq!("REMOVE INDEX test ON test", format!("{}", out))
+	}
+
+	#[test]
+	#[cfg(feature = "sql2")]
+	fn remove_index_if_exists() {
+		let sql = "REMOVE INDEX IF EXISTS test ON test";
+		let res = remove(sql);
+		let out = res.unwrap().1;
+		assert_eq!("REMOVE INDEX IF EXISTS test ON test", format!("{}", out))
+	}
+
+	#[test]
+	#[cfg(feature = "sql2")]
+	fn remove_index_if() {
+		let sql = "REMOVE INDEX IF test ON test";
+		let res = remove(sql);
+		assert!(res.is_err());
+	}
+
+	/// REMOVE NAMESPACE tests
+
+	#[test]
+	fn remove_namespace() {
+		let sql = "REMOVE NAMESPACE test";
+		let res = remove(sql);
+		let out = res.unwrap().1;
+		assert_eq!("REMOVE NAMESPACE test", format!("{}", out))
+	}
+
+	#[test]
+	#[cfg(feature = "sql2")]
+	fn remove_namespace_if_exists() {
+		let sql = "REMOVE NAMESPACE IF EXISTS test";
+		let res = remove(sql);
+		let out = res.unwrap().1;
+		assert_eq!("REMOVE NAMESPACE IF EXISTS test", format!("{}", out))
+	}
+
+	#[test]
+	#[cfg(feature = "sql2")]
+	fn remove_namespace_if() {
+		let sql = "REMOVE NAMESPACE IF test";
+		let res = remove(sql);
+		assert!(res.is_err());
+	}
+
+	/// REMOVE PARAM tests
+
+	#[test]
+	fn remove_param() {
+		let sql = "REMOVE PARAM $test";
+		let res = remove(sql);
+		let out = res.unwrap().1;
+		assert_eq!("REMOVE PARAM $test", format!("{}", out))
+	}
+
+	#[test]
+	#[cfg(feature = "sql2")]
+	fn remove_param_if_exists() {
+		let sql = "REMOVE PARAM IF EXISTS $test";
+		let res = remove(sql);
+		let out = res.unwrap().1;
+		assert_eq!("REMOVE PARAM IF EXISTS $test", format!("{}", out))
+	}
+
+	#[test]
+	#[cfg(feature = "sql2")]
+	fn remove_param_if() {
+		let sql = "REMOVE PARAM IF $test";
+		let res = remove(sql);
+		assert!(res.is_err());
+	}
+
+	/// REMOVE SCOPE tests
+
+	#[test]
+	fn remove_scope() {
+		let sql = "REMOVE SCOPE test";
+		let res = remove(sql);
+		let out = res.unwrap().1;
+		assert_eq!("REMOVE SCOPE test", format!("{}", out))
+	}
+
+	#[test]
+	#[cfg(feature = "sql2")]
+	fn remove_scope_if_exists() {
+		let sql = "REMOVE SCOPE IF EXISTS test";
+		let res = remove(sql);
+		let out = res.unwrap().1;
+		assert_eq!("REMOVE SCOPE IF EXISTS test", format!("{}", out))
+	}
+
+	#[test]
+	#[cfg(feature = "sql2")]
+	fn remove_scope_if() {
+		let sql = "REMOVE SCOPE IF test";
+		let res = remove(sql);
+		assert!(res.is_err());
+	}
+
+	/// REMOVE TABLE tests
+
 	#[test]
 	fn remove_table() {
 		let sql = "REMOVE TABLE test";
@@ -262,16 +600,70 @@ mod tests {
 	#[test]
 	#[cfg(feature = "sql2")]
 	fn remove_table_if_exists() {
-		let sql = "REMOVE TABLE test IF EXISTS";
+		let sql = "REMOVE TABLE IF EXISTS test";
 		let res = remove(sql);
 		let out = res.unwrap().1;
-		assert_eq!("REMOVE TABLE test IF EXISTS", format!("{}", out))
+		assert_eq!("REMOVE TABLE IF EXISTS test", format!("{}", out))
 	}
 
 	#[test]
 	#[cfg(feature = "sql2")]
 	fn remove_table_if() {
-		let sql = "REMOVE TABLE test IF";
+		let sql = "REMOVE TABLE IF test";
+		let res = remove(sql);
+		assert!(res.is_err());
+	}
+
+	/// REMOVE TOKEN tests
+
+	#[test]
+	fn remove_token() {
+		let sql = "REMOVE TOKEN test ON NAMESPACE";
+		let res = remove(sql);
+		let out = res.unwrap().1;
+		assert_eq!("REMOVE TOKEN test ON NAMESPACE", format!("{}", out))
+	}
+
+	#[test]
+	#[cfg(feature = "sql2")]
+	fn remove_token_if_exists() {
+		let sql = "REMOVE TOKEN IF EXISTS test ON NAMESPACE";
+		let res = remove(sql);
+		let out = res.unwrap().1;
+		assert_eq!("REMOVE TOKEN IF EXISTS test ON NAMESPACE", format!("{}", out))
+	}
+
+	#[test]
+	#[cfg(feature = "sql2")]
+	fn remove_token_if() {
+		let sql = "REMOVE TOKEN IF test ON NAMESPACE";
+		let res = remove(sql);
+		assert!(res.is_err());
+	}
+
+	/// REMOVE USER tests
+
+	#[test]
+	fn remove_user() {
+		let sql = "REMOVE USER test ON ROOT";
+		let res = remove(sql);
+		let out = res.unwrap().1;
+		assert_eq!("REMOVE USER test ON ROOT", format!("{}", out))
+	}
+
+	#[test]
+	#[cfg(feature = "sql2")]
+	fn remove_user_if_exists() {
+		let sql = "REMOVE USER IF EXISTS test ON ROOT";
+		let res = remove(sql);
+		let out = res.unwrap().1;
+		assert_eq!("REMOVE USER IF EXISTS test ON ROOT", format!("{}", out))
+	}
+
+	#[test]
+	#[cfg(feature = "sql2")]
+	fn remove_user_if() {
+		let sql = "REMOVE USER IF test ON ROOT";
 		let res = remove(sql);
 		assert!(res.is_err());
 	}

core/src/syn/v2/parser/stmt/remove.rs

@@ -21,50 +21,6 @@ impl Parser<'_> {
 	pub fn parse_remove_stmt(&mut self) -> ParseResult<RemoveStatement> {
 		let res = match self.next().kind {
 			t!("NAMESPACE") => {
-				let name = self.next_token_value()?;
-				RemoveStatement::Namespace(RemoveNamespaceStatement {
-					name,
-				})
-			}
-			t!("DATABASE") => {
-				let name = self.next_token_value()?;
-				RemoveStatement::Database(RemoveDatabaseStatement {
-					name,
-				})
-			}
-			t!("FUNCTION") => {
-				let name = self.parse_custom_function_name()?;
-				let next = self.peek();
-				if self.eat(t!("(")) {
-					self.expect_closing_delimiter(t!(")"), next.span)?;
-				}
-				RemoveStatement::Function(RemoveFunctionStatement {
-					name,
-				})
-			}
-			t!("TOKEN") => {
-				let name = self.next_token_value()?;
-				expected!(self, t!("ON"));
-				let base = self.parse_base(true)?;
-				RemoveStatement::Token(crate::sql::statements::RemoveTokenStatement {
-					name,
-					base,
-				})
-			}
-			t!("SCOPE") => {
-				let name = self.next_token_value()?;
-				RemoveStatement::Scope(RemoveScopeStatement {
-					name,
-				})
-			}
-			t!("PARAM") => {
-				let name = self.next_token_value::<Param>()?;
-				RemoveStatement::Param(RemoveParamStatement {
-					name: name.0,
-				})
-			}
-			t!("TABLE") => {
-				let name = self.next_token_value()?;
 				#[cfg(feature = "sql2")]
 				let if_exists = if self.eat(t!("IF")) {
 					expected!(self, t!("EXISTS"));
@@ -72,6 +28,110 @@ impl Parser<'_> {
 				} else {
 					false
 				};
+				let name = self.next_token_value()?;
+
+				RemoveStatement::Namespace(RemoveNamespaceStatement {
+					name,
+					#[cfg(feature = "sql2")]
+					if_exists,
+				})
+			}
+			t!("DATABASE") => {
+				#[cfg(feature = "sql2")]
+				let if_exists = if self.eat(t!("IF")) {
+					expected!(self, t!("EXISTS"));
+					true
+				} else {
+					false
+				};
+				let name = self.next_token_value()?;
+
+				RemoveStatement::Database(RemoveDatabaseStatement {
+					name,
+					#[cfg(feature = "sql2")]
+					if_exists,
+				})
+			}
+			t!("FUNCTION") => {
+				#[cfg(feature = "sql2")]
+				let if_exists = if self.eat(t!("IF")) {
+					expected!(self, t!("EXISTS"));
+					true
+				} else {
+					false
+				};
+				let name = self.parse_custom_function_name()?;
+				let next = self.peek();
+				if self.eat(t!("(")) {
+					self.expect_closing_delimiter(t!(")"), next.span)?;
+				}
+
+				RemoveStatement::Function(RemoveFunctionStatement {
+					name,
+					#[cfg(feature = "sql2")]
+					if_exists,
+				})
+			}
+			t!("TOKEN") => {
+				#[cfg(feature = "sql2")]
+				let if_exists = if self.eat(t!("IF")) {
+					expected!(self, t!("EXISTS"));
+					true
+				} else {
+					false
+				};
+				let name = self.next_token_value()?;
+				expected!(self, t!("ON"));
+				let base = self.parse_base(true)?;
+
+				RemoveStatement::Token(crate::sql::statements::RemoveTokenStatement {
+					name,
+					base,
+					#[cfg(feature = "sql2")]
+					if_exists,
+				})
+			}
+			t!("SCOPE") => {
+				#[cfg(feature = "sql2")]
+				let if_exists = if self.eat(t!("IF")) {
+					expected!(self, t!("EXISTS"));
+					true
+				} else {
+					false
+				};
+				let name = self.next_token_value()?;
+
+				RemoveStatement::Scope(RemoveScopeStatement {
+					name,
+					#[cfg(feature = "sql2")]
+					if_exists,
+				})
+			}
+			t!("PARAM") => {
+				#[cfg(feature = "sql2")]
+				let if_exists = if self.eat(t!("IF")) {
+					expected!(self, t!("EXISTS"));
+					true
+				} else {
+					false
+				};
+				let name = self.next_token_value::<Param>()?;
+
+				RemoveStatement::Param(RemoveParamStatement {
+					name: name.0,
+					#[cfg(feature = "sql2")]
+					if_exists,
+				})
+			}
+			t!("TABLE") => {
+				#[cfg(feature = "sql2")]
+				let if_exists = if self.eat(t!("IF")) {
+					expected!(self, t!("EXISTS"));
+					true
+				} else {
+					false
+				};
+				let name = self.next_token_value()?;
 
 				RemoveStatement::Table(crate::sql::statements::RemoveTableStatement {
 					name,
@@ -80,48 +140,98 @@ impl Parser<'_> {
 				})
 			}
 			t!("EVENT") => {
+				#[cfg(feature = "sql2")]
+				let if_exists = if self.eat(t!("IF")) {
+					expected!(self, t!("EXISTS"));
+					true
+				} else {
+					false
+				};
 				let name = self.next_token_value()?;
 				expected!(self, t!("ON"));
 				self.eat(t!("TABLE"));
 				let table = self.next_token_value()?;
+
 				RemoveStatement::Event(RemoveEventStatement {
 					name,
 					what: table,
+					#[cfg(feature = "sql2")]
+					if_exists,
 				})
 			}
 			t!("FIELD") => {
+				#[cfg(feature = "sql2")]
+				let if_exists = if self.eat(t!("IF")) {
+					expected!(self, t!("EXISTS"));
+					true
+				} else {
+					false
+				};
 				let idiom = self.parse_local_idiom()?;
 				expected!(self, t!("ON"));
 				self.eat(t!("TABLE"));
 				let table = self.next_token_value()?;
+
 				RemoveStatement::Field(RemoveFieldStatement {
 					name: idiom,
 					what: table,
+					#[cfg(feature = "sql2")]
+					if_exists,
 				})
 			}
 			t!("INDEX") => {
+				#[cfg(feature = "sql2")]
+				let if_exists = if self.eat(t!("IF")) {
+					expected!(self, t!("EXISTS"));
+					true
+				} else {
+					false
+				};
 				let name = self.next_token_value()?;
 				expected!(self, t!("ON"));
 				self.eat(t!("TABLE"));
 				let what = self.next_token_value()?;
+
 				RemoveStatement::Index(RemoveIndexStatement {
 					name,
 					what,
+					#[cfg(feature = "sql2")]
+					if_exists,
 				})
 			}
 			t!("ANALYZER") => {
+				#[cfg(feature = "sql2")]
+				let if_exists = if self.eat(t!("IF")) {
+					expected!(self, t!("EXISTS"));
+					true
+				} else {
+					false
+				};
 				let name = self.next_token_value()?;
+
 				RemoveStatement::Analyzer(RemoveAnalyzerStatement {
 					name,
+					#[cfg(feature = "sql2")]
+					if_exists,
 				})
 			}
 			t!("USER") => {
+				#[cfg(feature = "sql2")]
+				let if_exists = if self.eat(t!("IF")) {
+					expected!(self, t!("EXISTS"));
+					true
+				} else {
+					false
+				};
 				let name = self.next_token_value()?;
 				expected!(self, t!("ON"));
 				let base = self.parse_base(false)?;
+
 				RemoveStatement::User(RemoveUserStatement {
 					name,
 					base,
+					#[cfg(feature = "sql2")]
+					if_exists,
 				})
 			}
 			x => unexpected!(self, x, "a remove statement keyword"),

core/src/syn/v2/parser/test/stmt.rs

@@ -1057,7 +1057,9 @@ fn parse_remove() {
 	assert_eq!(
 		res,
 		Statement::Remove(RemoveStatement::Namespace(RemoveNamespaceStatement {
-			name: Ident("ns".to_owned())
+			name: Ident("ns".to_owned()),
+			#[cfg(feature = "sql2")]
+			if_exists: false,
 		}))
 	);
 
@@ -1065,7 +1067,9 @@ fn parse_remove() {
 	assert_eq!(
 		res,
 		Statement::Remove(RemoveStatement::Database(RemoveDatabaseStatement {
-			name: Ident("database".to_owned())
+			name: Ident("database".to_owned()),
+			#[cfg(feature = "sql2")]
+			if_exists: false,
 		}))
 	);
 
@@ -1073,14 +1077,18 @@ fn parse_remove() {
 	assert_eq!(
 		res,
 		Statement::Remove(RemoveStatement::Function(RemoveFunctionStatement {
-			name: Ident("foo::bar".to_owned())
+			name: Ident("foo::bar".to_owned()),
+			#[cfg(feature = "sql2")]
+			if_exists: false,
 		}))
 	);
 	let res = test_parse!(parse_stmt, r#"REMOVE FUNCTION fn::foo::bar();"#).unwrap();
 	assert_eq!(
 		res,
 		Statement::Remove(RemoveStatement::Function(RemoveFunctionStatement {
-			name: Ident("foo::bar".to_owned())
+			name: Ident("foo::bar".to_owned()),
+			#[cfg(feature = "sql2")]
+			if_exists: false,
 		}))
 	);
 
@@ -1089,7 +1097,9 @@ fn parse_remove() {
 		res,
 		Statement::Remove(RemoveStatement::Token(RemoveTokenStatement {
 			name: Ident("foo".to_owned()),
-			base: Base::Sc(Ident("bar".to_owned()))
+			base: Base::Sc(Ident("bar".to_owned())),
+			#[cfg(feature = "sql2")]
+			if_exists: false,
 		}))
 	);
 
@@ -1098,6 +1108,8 @@ fn parse_remove() {
 		res,
 		Statement::Remove(RemoveStatement::Scope(RemoveScopeStatement {
 			name: Ident("foo".to_owned()),
+			#[cfg(feature = "sql2")]
+			if_exists: false,
 		}))
 	);
 
@@ -1106,6 +1118,8 @@ fn parse_remove() {
 		res,
 		Statement::Remove(RemoveStatement::Param(RemoveParamStatement {
 			name: Ident("foo".to_owned()),
+			#[cfg(feature = "sql2")]
+			if_exists: false,
 		}))
 	);
 
@@ -1125,6 +1139,8 @@ fn parse_remove() {
 		Statement::Remove(RemoveStatement::Event(RemoveEventStatement {
 			name: Ident("foo".to_owned()),
 			what: Ident("bar".to_owned()),
+			#[cfg(feature = "sql2")]
+			if_exists: false,
 		}))
 	);
 
@@ -1138,6 +1154,8 @@ fn parse_remove() {
 				Part::Index(Number::Int(10))
 			]),
 			what: Ident("bar".to_owned()),
+			#[cfg(feature = "sql2")]
+			if_exists: false,
 		}))
 	);
 
@@ -1147,6 +1165,8 @@ fn parse_remove() {
 		Statement::Remove(RemoveStatement::Index(RemoveIndexStatement {
 			name: Ident("foo".to_owned()),
 			what: Ident("bar".to_owned()),
+			#[cfg(feature = "sql2")]
+			if_exists: false,
 		}))
 	);
 
@@ -1155,6 +1175,8 @@ fn parse_remove() {
 		res,
 		Statement::Remove(RemoveStatement::Analyzer(RemoveAnalyzerStatement {
 			name: Ident("foo".to_owned()),
+			#[cfg(feature = "sql2")]
+			if_exists: false,
 		}))
 	);
 
@@ -1164,6 +1186,8 @@ fn parse_remove() {
 		Statement::Remove(RemoveStatement::User(RemoveUserStatement {
 			name: Ident("foo".to_owned()),
 			base: Base::Db,
+			#[cfg(feature = "sql2")]
+			if_exists: false,
 		}))
 	);
 }

core/src/syn/v2/parser/test/streaming.rs

@@ -589,6 +589,7 @@ fn statements() -> Vec<Statement> {
 		}),
 		Statement::Remove(RemoveStatement::Function(RemoveFunctionStatement {
 			name: Ident("foo::bar".to_owned()),
+			if_exists: false,
 		})),
 		Statement::Remove(RemoveStatement::Field(RemoveFieldStatement {
 			name: Idiom(vec![
@@ -597,6 +598,7 @@ fn statements() -> Vec<Statement> {
 				Part::Index(Number::Int(10)),
 			]),
 			what: Ident("bar".to_owned()),
+			if_exists: false,
 		})),
 		Statement::Update(UpdateStatement {
 			only: true,

lib/tests/remove.rs

@@ -149,9 +149,383 @@ async fn should_error_when_remove_and_table_does_not_exist() -> Result<(), Error
 
 #[tokio::test]
 #[cfg(feature = "sql2")]
-async fn should_not_error_when_remove_if_exists() -> Result<(), Error> {
+async fn should_not_error_when_remove_table_if_exists() -> Result<(), Error> {
 	let sql = "
-		REMOVE TABLE foo IF EXISTS;
+		REMOVE TABLE IF EXISTS foo;
+	";
+	let dbs = new_ds().await?;
+	let ses = Session::owner().with_ns("test").with_db("test");
+	let res = &mut dbs.execute(sql, &ses, None).await?;
+	assert_eq!(res.len(), 1);
+	//
+	let tmp = res.remove(0).result?;
+	assert_eq!(tmp, Value::None);
+
+	Ok(())
+}
+
+#[tokio::test]
+#[cfg(feature = "sql2")]
+async fn should_error_when_remove_and_analyzer_does_not_exist() -> Result<(), Error> {
+	let sql = "
+		REMOVE ANALYZER foo;
+	";
+	let dbs = new_ds().await?;
+	let ses = Session::owner().with_ns("test").with_db("test");
+	let res = &mut dbs.execute(sql, &ses, None).await?;
+	assert_eq!(res.len(), 1);
+	//
+	let tmp = res.remove(0).result.unwrap_err();
+	assert!(matches!(tmp, Error::AzNotFound { .. }),);
+
+	Ok(())
+}
+
+#[tokio::test]
+#[cfg(feature = "sql2")]
+async fn should_not_error_when_remove_analyzer_if_exists() -> Result<(), Error> {
+	let sql = "
+		REMOVE ANALYZER IF EXISTS foo;
+	";
+	let dbs = new_ds().await?;
+	let ses = Session::owner().with_ns("test").with_db("test");
+	let res = &mut dbs.execute(sql, &ses, None).await?;
+	assert_eq!(res.len(), 1);
+	//
+	let tmp = res.remove(0).result?;
+	assert_eq!(tmp, Value::None);
+
+	Ok(())
+}
+
+#[tokio::test]
+#[cfg(feature = "sql2")]
+async fn should_error_when_remove_and_database_does_not_exist() -> Result<(), Error> {
+	let sql = "
+		REMOVE DATABASE foo;
+	";
+	let dbs = new_ds().await?;
+	let ses = Session::owner().with_ns("test").with_db("test");
+	let res = &mut dbs.execute(sql, &ses, None).await?;
+	assert_eq!(res.len(), 1);
+	//
+	let tmp = res.remove(0).result.unwrap_err();
+	assert!(matches!(tmp, Error::DbNotFound { .. }),);
+
+	Ok(())
+}
+
+#[tokio::test]
+#[cfg(feature = "sql2")]
+async fn should_not_error_when_remove_database_if_exists() -> Result<(), Error> {
+	let sql = "
+		REMOVE DATABASE IF EXISTS foo;
+	";
+	let dbs = new_ds().await?;
+	let ses = Session::owner().with_ns("test").with_db("test");
+	let res = &mut dbs.execute(sql, &ses, None).await?;
+	assert_eq!(res.len(), 1);
+	//
+	let tmp = res.remove(0).result?;
+	assert_eq!(tmp, Value::None);
+
+	Ok(())
+}
+
+#[tokio::test]
+#[cfg(feature = "sql2")]
+async fn should_error_when_remove_and_event_does_not_exist() -> Result<(), Error> {
+	let sql = "
+		REMOVE EVENT foo ON bar;
+	";
+	let dbs = new_ds().await?;
+	let ses = Session::owner().with_ns("test").with_db("test");
+	let res = &mut dbs.execute(sql, &ses, None).await?;
+	assert_eq!(res.len(), 1);
+	//
+	let tmp = res.remove(0).result.unwrap_err();
+	assert!(matches!(tmp, Error::EvNotFound { .. }),);
+
+	Ok(())
+}
+
+#[tokio::test]
+#[cfg(feature = "sql2")]
+async fn should_not_error_when_remove_event_if_exists() -> Result<(), Error> {
+	let sql = "
+		REMOVE EVENT IF EXISTS foo ON bar;
+	";
+	let dbs = new_ds().await?;
+	let ses = Session::owner().with_ns("test").with_db("test");
+	let res = &mut dbs.execute(sql, &ses, None).await?;
+	assert_eq!(res.len(), 1);
+	//
+	let tmp = res.remove(0).result?;
+	assert_eq!(tmp, Value::None);
+
+	Ok(())
+}
+
+#[tokio::test]
+#[cfg(feature = "sql2")]
+async fn should_error_when_remove_and_field_does_not_exist() -> Result<(), Error> {
+	let sql = "
+		REMOVE FIELD foo ON bar;
+	";
+	let dbs = new_ds().await?;
+	let ses = Session::owner().with_ns("test").with_db("test");
+	let res = &mut dbs.execute(sql, &ses, None).await?;
+	assert_eq!(res.len(), 1);
+	//
+	let tmp = res.remove(0).result.unwrap_err();
+	assert!(matches!(tmp, Error::FdNotFound { .. }),);
+
+	Ok(())
+}
+
+#[tokio::test]
+#[cfg(feature = "sql2")]
+async fn should_not_error_when_remove_field_if_exists() -> Result<(), Error> {
+	let sql = "
+		REMOVE FIELD IF EXISTS foo ON bar;
+	";
+	let dbs = new_ds().await?;
+	let ses = Session::owner().with_ns("test").with_db("test");
+	let res = &mut dbs.execute(sql, &ses, None).await?;
+	assert_eq!(res.len(), 1);
+	//
+	let tmp = res.remove(0).result?;
+	assert_eq!(tmp, Value::None);
+
+	Ok(())
+}
+
+#[tokio::test]
+#[cfg(feature = "sql2")]
+async fn should_error_when_remove_and_function_does_not_exist() -> Result<(), Error> {
+	let sql = "
+		REMOVE FUNCTION fn::foo;
+	";
+	let dbs = new_ds().await?;
+	let ses = Session::owner().with_ns("test").with_db("test");
+	let res = &mut dbs.execute(sql, &ses, None).await?;
+	assert_eq!(res.len(), 1);
+	//
+	let tmp = res.remove(0).result.unwrap_err();
+	assert!(matches!(tmp, Error::FcNotFound { .. }),);
+
+	Ok(())
+}
+
+#[tokio::test]
+#[cfg(feature = "sql2")]
+async fn should_not_error_when_remove_function_if_exists() -> Result<(), Error> {
+	let sql = "
+		REMOVE FUNCTION IF EXISTS fn::foo;
+	";
+	let dbs = new_ds().await?;
+	let ses = Session::owner().with_ns("test").with_db("test");
+	let res = &mut dbs.execute(sql, &ses, None).await?;
+	assert_eq!(res.len(), 1);
+	//
+	let tmp = res.remove(0).result?;
+	assert_eq!(tmp, Value::None);
+
+	Ok(())
+}
+
+#[tokio::test]
+#[cfg(feature = "sql2")]
+async fn should_error_when_remove_and_index_does_not_exist() -> Result<(), Error> {
+	let sql = "
+		REMOVE INDEX foo ON bar;
+	";
+	let dbs = new_ds().await?;
+	let ses = Session::owner().with_ns("test").with_db("test");
+	let res = &mut dbs.execute(sql, &ses, None).await?;
+	assert_eq!(res.len(), 1);
+	//
+	let tmp = res.remove(0).result.unwrap_err();
+	assert!(matches!(tmp, Error::IxNotFound { .. }),);
+
+	Ok(())
+}
+
+#[tokio::test]
+#[cfg(feature = "sql2")]
+async fn should_not_error_when_remove_index_if_exists() -> Result<(), Error> {
+	let sql = "
+		REMOVE INDEX IF EXISTS foo ON bar;
+	";
+	let dbs = new_ds().await?;
+	let ses = Session::owner().with_ns("test").with_db("test");
+	let res = &mut dbs.execute(sql, &ses, None).await?;
+	assert_eq!(res.len(), 1);
+	//
+	let tmp = res.remove(0).result?;
+	assert_eq!(tmp, Value::None);
+
+	Ok(())
+}
+
+#[tokio::test]
+#[cfg(feature = "sql2")]
+async fn should_error_when_remove_and_namespace_does_not_exist() -> Result<(), Error> {
+	let sql = "
+		REMOVE NAMESPACE foo;
+	";
+	let dbs = new_ds().await?;
+	let ses = Session::owner().with_ns("test").with_db("test");
+	let res = &mut dbs.execute(sql, &ses, None).await?;
+	assert_eq!(res.len(), 1);
+	//
+	let tmp = res.remove(0).result.unwrap_err();
+	assert!(matches!(tmp, Error::NsNotFound { .. }),);
+
+	Ok(())
+}
+
+#[tokio::test]
+#[cfg(feature = "sql2")]
+async fn should_not_error_when_remove_namespace_if_exists() -> Result<(), Error> {
+	let sql = "
+		REMOVE NAMESPACE IF EXISTS foo;
+	";
+	let dbs = new_ds().await?;
+	let ses = Session::owner().with_ns("test").with_db("test");
+	let res = &mut dbs.execute(sql, &ses, None).await?;
+	assert_eq!(res.len(), 1);
+	//
+	let tmp = res.remove(0).result?;
+	assert_eq!(tmp, Value::None);
+
+	Ok(())
+}
+
+#[tokio::test]
+#[cfg(feature = "sql2")]
+async fn should_error_when_remove_and_param_does_not_exist() -> Result<(), Error> {
+	let sql = "
+		REMOVE PARAM $foo;
+	";
+	let dbs = new_ds().await?;
+	let ses = Session::owner().with_ns("test").with_db("test");
+	let res = &mut dbs.execute(sql, &ses, None).await?;
+	assert_eq!(res.len(), 1);
+	//
+	let tmp = res.remove(0).result.unwrap_err();
+	assert!(matches!(tmp, Error::PaNotFound { .. }),);
+
+	Ok(())
+}
+
+#[tokio::test]
+#[cfg(feature = "sql2")]
+async fn should_not_error_when_remove_param_if_exists() -> Result<(), Error> {
+	let sql = "
+		REMOVE PARAM IF EXISTS $foo;
+	";
+	let dbs = new_ds().await?;
+	let ses = Session::owner().with_ns("test").with_db("test");
+	let res = &mut dbs.execute(sql, &ses, None).await?;
+	assert_eq!(res.len(), 1);
+	//
+	let tmp = res.remove(0).result?;
+	assert_eq!(tmp, Value::None);
+
+	Ok(())
+}
+
+#[tokio::test]
+#[cfg(feature = "sql2")]
+async fn should_error_when_remove_and_scope_does_not_exist() -> Result<(), Error> {
+	let sql = "
+		REMOVE SCOPE foo;
+	";
+	let dbs = new_ds().await?;
+	let ses = Session::owner().with_ns("test").with_db("test");
+	let res = &mut dbs.execute(sql, &ses, None).await?;
+	assert_eq!(res.len(), 1);
+	//
+	let tmp = res.remove(0).result.unwrap_err();
+	assert!(matches!(tmp, Error::ScNotFound { .. }),);
+
+	Ok(())
+}
+
+#[tokio::test]
+#[cfg(feature = "sql2")]
+async fn should_not_error_when_remove_scope_if_exists() -> Result<(), Error> {
+	let sql = "
+		REMOVE SCOPE IF EXISTS foo;
+	";
+	let dbs = new_ds().await?;
+	let ses = Session::owner().with_ns("test").with_db("test");
+	let res = &mut dbs.execute(sql, &ses, None).await?;
+	assert_eq!(res.len(), 1);
+	//
+	let tmp = res.remove(0).result?;
+	assert_eq!(tmp, Value::None);
+
+	Ok(())
+}
+
+#[tokio::test]
+#[cfg(feature = "sql2")]
+async fn should_error_when_remove_and_token_does_not_exist() -> Result<(), Error> {
+	let sql = "
+		REMOVE TOKEN foo ON NAMESPACE;
+	";
+	let dbs = new_ds().await?;
+	let ses = Session::owner().with_ns("test").with_db("test");
+	let res = &mut dbs.execute(sql, &ses, None).await?;
+	assert_eq!(res.len(), 1);
+	//
+	let tmp = res.remove(0).result.unwrap_err();
+	assert!(matches!(tmp, Error::NtNotFound { .. }),);
+
+	Ok(())
+}
+
+#[tokio::test]
+#[cfg(feature = "sql2")]
+async fn should_not_error_when_remove_token_if_exists() -> Result<(), Error> {
+	let sql = "
+		REMOVE TOKEN IF EXISTS foo ON NAMESPACE;
+	";
+	let dbs = new_ds().await?;
+	let ses = Session::owner().with_ns("test").with_db("test");
+	let res = &mut dbs.execute(sql, &ses, None).await?;
+	assert_eq!(res.len(), 1);
+	//
+	let tmp = res.remove(0).result?;
+	assert_eq!(tmp, Value::None);
+
+	Ok(())
+}
+
+#[tokio::test]
+#[cfg(feature = "sql2")]
+async fn should_error_when_remove_and_user_does_not_exist() -> Result<(), Error> {
+	let sql = "
+		REMOVE USER foo ON ROOT;
+	";
+	let dbs = new_ds().await?;
+	let ses = Session::owner().with_ns("test").with_db("test");
+	let res = &mut dbs.execute(sql, &ses, None).await?;
+	assert_eq!(res.len(), 1);
+	//
+	let tmp = res.remove(0).result.unwrap_err();
+	assert!(matches!(tmp, Error::UserRootNotFound { .. }),);
+
+	Ok(())
+}
+
+#[tokio::test]
+#[cfg(feature = "sql2")]
+async fn should_not_error_when_remove_user_if_exists() -> Result<(), Error> {
+	let sql = "
+		REMOVE USER IF EXISTS foo ON ROOT;
 	";
 	let dbs = new_ds().await?;
 	let ses = Session::owner().with_ns("test").with_db("test");