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DO(7)			 PostgreSQL 17.5 Documentation			 DO(7)

NAME
       DO - execute an anonymous code block

SYNOPSIS
       DO [ LANGUAGE lang_name ] code

DESCRIPTION
       DO executes an anonymous	code block, or in other	words a	transient
       anonymous function in a procedural language.

       The code	block is treated as though it were the body of a function with
       no parameters, returning	void. It is parsed and executed	a single time.

       The optional LANGUAGE clause can	be written either before or after the
       code block.

PARAMETERS
       code
	   The procedural language code	to be executed.	This must be specified
	   as a	string literal,	just as	in CREATE FUNCTION. Use	of a
	   dollar-quoted literal is recommended.

       lang_name
	   The name of the procedural language the code	is written in. If
	   omitted, the	default	is plpgsql.

NOTES
       The procedural language to be used must already have been installed
       into the	current	database by means of CREATE EXTENSION.	plpgsql	is
       installed by default, but other languages are not.

       The user	must have USAGE	privilege for the procedural language, or must
       be a superuser if the language is untrusted. This is the	same privilege
       requirement as for creating a function in the language.

       If DO is	executed in a transaction block, then the procedure code
       cannot execute transaction control statements. Transaction control
       statements are only allowed if DO is executed in	its own	transaction.

EXAMPLES
       Grant all privileges on all views in schema public to role webuser:

	   DO $$DECLARE	r record;
	   BEGIN
	       FOR r IN	SELECT table_schema, table_name	FROM information_schema.tables
			WHERE table_type = 'VIEW' AND table_schema = 'public'
	       LOOP
		   EXECUTE 'GRANT ALL ON ' || quote_ident(r.table_schema) || '.' || quote_ident(r.table_name) || ' TO webuser';
	       END LOOP;
	   END$$;

COMPATIBILITY
       There is	no DO statement	in the SQL standard.

SEE ALSO
       CREATE LANGUAGE (CREATE_LANGUAGE(7))

PostgreSQL 17.5			     2025				 DO(7)

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