Module sql_ast::ast

SQL Abstract Syntax Tree (AST) types

Structs

• Assignment
  SQL assignment foo = expr as used in SQLUpdate
• ColumnDef
  SQL column definition
• ColumnOptionDef
  An optionally-named ColumnOption: [ CONSTRAINT <name> ] <column-option>.
• Cte
  A single CTE (used after WITH): alias [(col1, col2, ...)] AS ( query ) The names in the column list before AS, when specified, replace the names of the columns returned by the query. The parser does not validate that the number of columns in the query matches the number of columns in the query.
• Fetch
• Function
  A function call
• Ident
  An identifier, decomposed into its value or character data and the quote style.
• Join
• ObjectName
  A name of a table, view, custom type, etc., possibly multi-part, i.e. db.schema.obj
• OrderByExpr
  SQL ORDER BY expression
• Query
  The most complete variant of a SELECT query expression, optionally including WITH, UNION / other set operations, and ORDER BY.
• Select
  A restricted variant of SELECT (without CTEs/ORDER BY), which may appear either as the only body item of an SQLQuery, or as an operand to a set operation like UNION.
• SqlOption
• TableAlias
• TableWithJoins
• Values
• WindowFrame
  Specifies the data processed by a window function, e.g. RANGE UNBOUNDED PRECEDING or ROWS BETWEEN 5 PRECEDING AND CURRENT ROW.
• WindowSpec
  A window specification (i.e. OVER (PARTITION BY .. ORDER BY .. etc.))

Enums

• AlterTableOperation
  An ALTER TABLE (Statement::AlterTable) operation
• BinaryOperator
  Binary operators
• ColumnOption
  ColumnOptions are modifiers that follow a column definition in a CREATE TABLE statement.
• DataType
  SQL data types
• DateTimeField
• Expr
  An SQL expression of any type.
• FileFormat
  External table’s available file format
• JoinConstraint
• JoinOperator
• ObjectType
• SelectItem
  One item of the comma-separated list following SELECT
• SetExpr
  A node in a tree, representing a “query body” expression, roughly: SELECT ... [ {UNION|EXCEPT|INTERSECT} SELECT ...]
• SetOperator
• Statement
  A top-level statement (SELECT, INSERT, CREATE, etc.)
• TableConstraint
  A table-level constraint, specified in a CREATE TABLE or an ALTER TABLE ADD <constraint> statement.
• TableFactor
  A table name or a parenthesized subquery with an optional alias
• UnaryOperator
  Unary operators
• Value
  Primitive SQL values such as number and string
• WindowFrameBound
  Specifies WindowFrame’s start_bound and end_bound
• WindowFrameUnits