​
Syntax

create_procedure ::= CREATE [ OR REPLACE ] PROCEDURE procedure_name 
                    ( [ parameter_list ] )
                    LANGUAGE language_name
                    AS procedure_body

procedure_name ::= [schema.]name

parameter_list ::= parameter [, ...]

parameter ::= [ parameter_mode ] [ parameter_name ] parameter_type [ DEFAULT default_value ]

parameter_mode ::= IN | OUT | INOUT

language_name ::= plpgsql | sql | c | internal

procedure_body ::= 'definition'
                | $$definition$$
                | $tag$definition$tag$
pgschema understands the following CREATE PROCEDURE features:
  • Schema-qualified names: Procedures can be defined in specific schemas
  • Parameters:
    • IN, OUT, INOUT parameter modes
    • Default parameter values
    • Named parameters with data types
  • Languages: Any PostgreSQL procedural language (plpgsql, sql, c, internal, etc.)
  • Procedure body: Any valid procedure definition with proper dollar-quoting

​
Canonical Format

When generating migration SQL, pgschema produces procedures in the following canonical format: 
CREATE OR REPLACE PROCEDURE [schema.]procedure_name(
    parameter_name parameter_type[ DEFAULT default_value][,
    ...]
)
LANGUAGE language_name
AS $tag$procedure_body$tag$;
Key characteristics of the canonical format:
  • Always uses CREATE OR REPLACE PROCEDURE for modifications
  • Parameters are formatted with line breaks for readability when multiple parameters exist
  • Uses intelligent dollar-quoting with automatic tag generation to avoid conflicts with procedure body content
  • For DROP operations: DROP PROCEDURE IF EXISTS procedure_name(parameter_types);
  • The parameter_types in DROP statements contain only the data types, not parameter names