70 lines
1.5 KiB
Rust
70 lines
1.5 KiB
Rust
use crate::dbs;
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use crate::dbs::Executor;
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use crate::dbs::Runtime;
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use crate::doc::Document;
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use crate::err::Error;
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use crate::sql::comment::mightbespace;
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use crate::sql::comment::shouldbespace;
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use crate::sql::expression::{expression, Expression};
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use crate::sql::literal::Literal;
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use crate::sql::param::{param, Param};
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use nom::bytes::complete::tag;
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use nom::bytes::complete::tag_no_case;
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use nom::IResult;
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use serde::{Deserialize, Serialize};
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use std::fmt;
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#[derive(Clone, Debug, Default, Eq, PartialEq, Serialize, Deserialize)]
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pub struct SetStatement {
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pub name: Param,
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pub what: Expression,
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}
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impl fmt::Display for SetStatement {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(f, "LET {} = {}", self.name, self.what)
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}
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}
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impl dbs::Process for SetStatement {
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fn process(
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&self,
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ctx: &Runtime,
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exe: &Executor,
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doc: Option<&Document>,
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) -> Result<Literal, Error> {
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todo!()
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}
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}
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pub fn set(i: &str) -> IResult<&str, SetStatement> {
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let (i, _) = tag_no_case("LET")(i)?;
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let (i, _) = shouldbespace(i)?;
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let (i, n) = param(i)?;
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let (i, _) = mightbespace(i)?;
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let (i, _) = tag("=")(i)?;
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let (i, _) = mightbespace(i)?;
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let (i, w) = expression(i)?;
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Ok((
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i,
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SetStatement {
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name: n,
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what: w,
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},
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))
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn let_statement() {
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let sql = "LET $name = NULL";
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let res = set(sql);
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assert!(res.is_ok());
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let out = res.unwrap().1;
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assert_eq!("LET $name = NULL", format!("{}", out));
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}
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}
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