PostgreSQL Syntax Reference

Reference PostgreSQL's grammar to understand SQL syntax and generate correct DDL.

Source Files

Local copies (preferred):

• internal/gram.y - Yacc/Bison grammar defining all PostgreSQL SQL syntax
• internal/scan.l - Flex lexer for tokenization

Searching the grammar:

grep -n "CreateTrigStmt:" internal/gram.y     # Find statement rule
grep -A 10 "TriggerWhen:" internal/gram.y     # Understand an option

Statement Types → Grammar Rules