Module ast 

The crabgresql AST for the SP2 slice.

Structs

ColumnDef

CopyStmt

Cte

FuncCall

SP27: a parsed function call. name is lowercased by the lexer.

HashShardingSpec

NonGoalRefusalSpec

One bounded PostgreSQL 18 syntax representative for an architectural refusal.

OrderItem

QueryExpr

A complete row-producing SQL query expression. The body may be a lone SELECT, a lone VALUES list, or a set-operation tree. The tail applies to the complete query expression.

SelectStmt

SequenceOptions

ValuesStmt

SP39: a VALUES row constructor list. Every row is non-empty; cross-row arity is checked during executor analysis so it gets PostgreSQL’s analysis SQLSTATE.

WithClause

Enums

AlterTableRename

BinaryOp

ColumnConstraint

CopyFormat

Expr

FuncArgs

SP27: a function call’s argument list. Star is the f(*) form (only count(*) is meaningful); Exprs is a (possibly empty) positional list.

ImportSelector

The optional table-filter for IMPORT FOREIGN SCHEMA.

IndexPlacement

IsolationLevel

Transaction isolation levels supported by SP4.

JoinConstraint

JoinKind

NonGoalCommand

Architectural non-goal commands tracked by the PostgreSQL compatibility matrix.

QueryBody

SP39: query bodies that may appear as set-operation leaves or derived tables.

RefusalCommand

Stable, typed metadata for commands that parse normally and then fail clear.

ResetTarget

RowLockStrength

SelectItem

SerialKind

SetExpr

SP38: a node in the set-operation tree. A Query leaf is one query block; a SetOp combines two sub-trees. INTERSECT binds tighter than UNION/EXCEPT; UNION/EXCEPT are left-associative (the parser encodes this in the tree shape).

SetOp

SetValue

SP37: the right-hand side of a SET (or the value form of SET TIME ZONE). Default is SET ... = DEFAULT / SET TIME ZONE { DEFAULT | LOCAL } (resets the parameter to its built-in default); Value is a literal/identifier value.

ShardingSpec

Statement

TableConstraint

TableExpr

SP33: one entry in the FROM clause — a base table, a derived table (subquery), or a join of two table-exprs. The comma form (FROM a, b) is a Vec<TableExpr> with len > 1 (implicit cross join).

UnaryOp

Constants

COPY_FROM_STDIN_SENTINEL

NON_GOAL_REFUSALS

Type Aliases

OptionList

A key-value option list for FDW DDL: OPTIONS (key 'value', …).