Module ast 

Internal SQL AST. Lifts the relevant subset of the libpg_query protobuf tree into a Rust enum the compiler walks. Statements not yet supported parse cleanly but compile to crate::SQLError::Unsupported.

Structs

AlterSequence

AlterTableStmt

CTE

ColumnDef

CreateForeignServer

CreateForeignTable

CreateFunction

CREATE [OR REPLACE] FUNCTION | PROCEDURE.

CreateIndex

CreateSequence

CreateTable

DeleteStmt

DropFunctionItem

One DROP FUNCTION / DROP PROCEDURE target.

DropFunctionStmt

DROP FUNCTION [IF EXISTS] name[(argtypes)] [, ...] and the DROP PROCEDURE equivalent.

DropStmt

ForeignKey

Table-level foreign key. local_columns.len() matches ref_columns.len(); the engine joins on the position-aligned pairs.

ForeignKeyRef

REFERENCES table(column) reference target.

FunctionBinding

FunctionParam

One declared parameter of a user-defined function or procedure.

GeneratedColumn

InsertStmt

JoinUsing

LockingClause

One PostgreSQL row-locking clause, including optional OF targets and the NOWAIT / SKIP LOCKED wait policy.

MergeStmt

OnConflict

OrderBy

Projection

ReturningAliases

RoutineColumnTypeReference

Structured relation-column identity carried by a routine %TYPE declaration until catalog binding resolves it to a concrete SQL type.

SelectStmt

SetOp

TableCheck

CHECK (expr) constraint with an optional name (CONSTRAINT <name> CHECK (...)).

TableConstraintSet

Durable table-level constraints that do not fit in ColumnDef.

TableKeyConstraint

A table key whose columns are compared as one tuple.

UpdateStmt

WindowFrame

WindowSpec

Enums

AlterTableAction

BinaryOp

ColumnType

DiscardTarget

DISCARD target. Mirrors PostgreSQL’s DiscardMode.

DropKind

Expr

Scalar expression nodes the compiler handles.

ForeignKeyAction

ForeignKeyMatch

FrameBound

FrameMode

FromClause

FunctionBody

Body of a user-defined routine.

FunctionParamMode

Parameter mode of a CREATE FUNCTION / CREATE PROCEDURE argument. Mirrors PostgreSQL’s FunctionParameterMode.

FunctionReturns

Declared result shape of a user-defined function.

FunctionVolatility

IMMUTABLE / STABLE / VOLATILE marker.

GeneratedColumnKind

JoinKind

LockStrength

PostgreSQL row-lock strength, strongest last.

LockWait

Wait policy for a row-locking clause.

MergeWhen

NullsOrder

OnConflictAction

SequenceRestart

Physical restart action carried by ALTER SEQUENCE.

SetOpKind

Statement

TableKeyConstraintKind

TransactionStmt

Functions

is_builtin_aggregate_function

Return whether name is a built-in aggregate understood by the planner.

Type Aliases

GeneratedFunctionDependency

ValueExpr

Expr restricted to value-producing forms used by INSERT rows.