Module compiler 

Lift a PostgreSQL parse tree into the internal Statement AST.

The facade exposes compilation while statement-family modules own validation and lowering. Tree-shaped SELECT/DDL/expression lowering remains in the private tree module, and PostgreSQL type interpretation remains in the private types module.

Functions

compile

plan_only_for_test

Lower DROP FUNCTION / DROP PROCEDURE. Each target arrives as an ObjectWithArgs; the argument type list (when spelled) is preserved as a typed signature because routine identity includes (schema, name, argument types).