Module ast

Expand description

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.))

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