360 lines
8.9 KiB
Go
360 lines
8.9 KiB
Go
// Copyright © 2016 Abcum Ltd
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package sql
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// --------------------------------------------------
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// Queries
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// --------------------------------------------------
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// Query represents a multi statement SQL query
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type Query struct {
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Statements Statements
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}
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// Statement represents a single SQL AST
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type Statement interface{}
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// Statements represents multiple SQL ASTs
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type Statements []Statement
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// --------------------------------------------------
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// Select
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// --------------------------------------------------
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// UseStatement represents a SQL USE statement.
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type UseStatement struct {
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NS string // Namespace
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DB string // Database
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CK string // Cipherkey
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}
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// --------------------------------------------------
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// Select
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// --------------------------------------------------
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// SelectStatement represents a SQL SELECT statement.
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type SelectStatement struct {
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EX bool // Explain
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KV string // Bucket
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NS string // Namespace
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DB string // Database
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Expr []*Field // Which fields
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What []Expr // What to select
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Cond []Expr // Select conditions
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Group []*Group // Group by
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Order []*Order // Order by
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Limit Expr // Limit by
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Start Expr // Start at
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Version Expr // Version
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}
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// --------------------------------------------------
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// Items
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// --------------------------------------------------
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// CreateStatement represents a SQL CREATE statement.
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//
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// CREATE person SET column = 'value' RETURN ID
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type CreateStatement struct {
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EX bool // Explain
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KV string // Bucket
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NS string // Namespace
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DB string // Database
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What []Expr // What to create
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Data []Expr // Create data
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Echo Token // What to return
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}
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// UpdateStatement represents a SQL UPDATE statement.
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//
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// UPDATE person SET column = 'value' WHERE age < 18 RETURN ID
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type UpdateStatement struct {
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EX bool // Explain
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KV string // Bucket
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NS string // Namespace
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DB string // Database
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What []Expr // What to update
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Data []Expr // Update data
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Cond []Expr // Update conditions
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Echo Token // What to return
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}
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// ModifyStatement represents a SQL UPDATE statement.
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//
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// MODIFY @person:123 WITH {} RETURN ID
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type ModifyStatement struct {
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EX bool // Explain
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KV string // Bucket
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NS string // Namespace
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DB string // Database
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What []Expr // What to modify
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Diff []Expr // Diff object
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Cond []Expr // Update conditions
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Echo Token // What to return
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}
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// DeleteStatement represents a SQL DELETE statement.
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//
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// DELETE FROM person WHERE age < 18 RETURN ID
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type DeleteStatement struct {
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EX bool // Explain
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KV string // Bucket
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NS string // Namespace
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DB string // Database
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Hard bool // Expunge
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What []Expr // What to delete
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Cond []Expr // Delete conditions
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Echo Token // What to return
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}
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// RelateStatement represents a SQL RELATE statement.
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//
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// RELATE friend FROM @person:123 TO @person:456 SET column = 'value' RETURN ID
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type RelateStatement struct {
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EX bool // Explain
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KV string // Bucket
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NS string // Namespace
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DB string // Database
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Type []Expr
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From []Expr
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To []Expr
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Data []Expr
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Echo Token // What to return
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}
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// RecordStatement represents a SQL CREATE EVENT statement.
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//
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// RECORD login ON @person:123 AT 2016-01-29T22:42:56.478Z SET column = true
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type RecordStatement struct {
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EX bool // Explain
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KV string // Bucket
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NS string // Namespace
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DB string // Database
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Type []Expr
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On []Expr
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At Expr
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Data []Expr
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Echo Token // What to return
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}
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// --------------------------------------------------
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// Table
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// --------------------------------------------------
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// DefineTableStatement represents an SQL DEFINE TABLE statement.
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//
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// DEFINE TABLE person
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type DefineTableStatement struct {
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EX bool // Explain
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KV string // Bucket
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NS string // Namespace
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DB string // Database
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What []Table // Table names
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}
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// RemoveTableStatement represents an SQL REMOVE TABLE statement.
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//
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// REMOVE TABLE person
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type RemoveTableStatement struct {
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EX bool // Explain
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KV string // Bucket
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NS string // Namespace
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DB string // Database
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What []Table // Table names
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}
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// --------------------------------------------------
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// Field
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// --------------------------------------------------
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// DefineFieldStatement represents an SQL DEFINE INDEX statement.
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//
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// DEFINE FIELD name ON person TYPE string CODE {}
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// DEFINE FIELD name ON person TYPE number MIN 0 MAX 5 DEFAULT 0
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// DEFINE FIELD name ON person TYPE custom ENUM [0,1,2,3,4,5] DEFAULT 0
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type DefineFieldStatement struct {
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EX bool // Explain
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KV string // Bucket
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NS string // Namespace
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DB string // Database
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Name Ident // Field name
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What []Table // Table names
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Type Ident // Field type
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Enum []interface{} // Custom options
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Code string // Field code
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Min float64 // Minimum value / length
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Max float64 // Maximum value / length
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Match string // Regex value
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Default interface{} // Default value
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Notnull bool // Notnull - can not be NULL?
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Readonly bool // Readonly - can not be changed?
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Mandatory bool // Mandatory - can not be VOID?
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Validate bool // Validate - can not be INCORRECT?
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}
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// RemoveFieldStatement represents an SQL REMOVE INDEX statement.
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//
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// REMOVE FIELD name ON person
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type RemoveFieldStatement struct {
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EX bool // Explain
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KV string // Bucket
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NS string // Namespace
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DB string // Database
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Name Ident // Field name
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What []Table // Table names
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}
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// --------------------------------------------------
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// Index
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// --------------------------------------------------
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// DefineIndexStatement represents an SQL DEFINE INDEX statement.
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//
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// DEFINE INDEX name ON person COLUMNS (account, age) UNIQUE
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type DefineIndexStatement struct {
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EX bool // Explain
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KV string // Bucket
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NS string // Namespace
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DB string // Database
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Name Ident // Index name
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What []Table // Table names
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Code string // Index code
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Cols []*Field // Index cols
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Uniq bool // Unique index
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}
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// RemoveIndexStatement represents an SQL REMOVE INDEX statement.
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//
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// REMOVE INDEX name ON person
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type RemoveIndexStatement struct {
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EX bool // Explain
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KV string // Bucket
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NS string // Namespace
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DB string // Database
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Name Ident // Index name
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What []Table // Table names
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}
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// ResyncIndexStatement represents an SQL RESYNC INDEX statement.
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//
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// RESYNC INDEX name ON person
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type ResyncIndexStatement struct {
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EX bool // Explain
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KV string // Bucket
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NS string // Namespace
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DB string // Database
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What []Table // Table names
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}
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// --------------------------------------------------
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// Literals
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// --------------------------------------------------
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// Expr represents a sql expression
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type Expr interface{}
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// All represents a wildcard expression.
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type All struct{}
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// Asc represents the ASC expression.
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type Asc struct{}
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// Desc represents the DESC expression.
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type Desc struct{}
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// Null represents a null expression.
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type Null struct{}
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// Void represents an expression which is not set.
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type Void struct{}
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// Empty represents an expression which is null or "".
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type Empty struct{}
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// Wildcard represents a wildcard expression.
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type Wildcard struct{}
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// ClosedExpression represents a parenthesized expression.
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type ClosedExpression struct {
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Expr Expr
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}
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// BinaryExpression represents a binary expression tree,
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type BinaryExpression struct {
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LHS Expr
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Op string
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RHS Expr
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}
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// DiffExpression represents a JSON DIFF PATCH
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type DiffExpression struct {
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JSON interface{}
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}
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// MergeExpression represents JSON to MERGE
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type MergeExpression struct {
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JSON interface{}
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}
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// ContentExpression represents JSON to REPLACE
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type ContentExpression struct {
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JSON interface{}
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}
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// --------------------------------------------------
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// Parts
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// --------------------------------------------------
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type Table string
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func (this Table) String() string {
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return string(this)
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}
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func (this Table) MarshalText() ([]byte, error) {
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return []byte(string(this)), nil
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}
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type Ident string
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func (this Ident) String() string {
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return string(this)
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}
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func (this Ident) MarshalText() ([]byte, error) {
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return []byte(string(this)), nil
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}
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// Thing comment
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type Thing struct {
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TB string
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ID interface{}
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}
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// Field comment
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type Field struct {
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Expr Expr
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Alias Expr
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}
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// Group comment
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type Group struct {
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Expr Expr
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}
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// Order comment
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type Order struct {
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Expr Expr
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Dir Expr
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}
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