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How do I return a set of records in PostgreSQL?
PL/pgSQL function CREATE OR REPLACE FUNCTION f_foo() — (open_id numeric) — parameter not used RETURNS TABLE (a int, b int, c int) AS $func$ BEGIN RETURN QUERY VALUES (1,2,3) , (3,4,5) , (3,4,5) ; END $func$ LANGUAGE plpgsql IMMUTABLE ROWS 3; In Postgres 9.6 or later you can also add PARALLEL SAFE .
What is procedure in PostgreSQL?
PostgreSQL allows you to extend the database functionality with user-defined functions by using various procedural languages, which are often referred to as stored procedures. With stored procedures you can create your own custom functions and reuse them in applications or as part of other database’s workflow.
What is return query in PostgreSQL?
RETURN QUERY has a variant RETURN QUERY EXECUTE , which specifies the query to be executed dynamically. Parameter expressions can be inserted into the computed query string via USING , in just the same way as in the EXECUTE command.
Does PostgreSQL support stored procedure?
PostgreSQL does not support stored procedures in the sense that a database such as Oracle does, but it does support stored functions. Stored procedures do not return a value, but stored functions return a single value. The stored function’s return value can be used in SELECT statements.
How do you return a table in SQL?
Specify the RETURNS TABLE keyword. Specify the BEGIN ATOMIC keyword to introduce the function-body. Specify the function body. Specify the RETURN clause with brackets in which you specify a query that defines the result set to be returned.
How to return table in stored procedure PostgreSQL?
CREATE OR REPLACE PROCEDURE public.test () RETURN TABLE ( id numeric , test varchar ) AS — Results — remove this $func$ BEGIN RETURN QUERY SELECT * FROM public.test END $func$ LANGUAGE plpgsql; but its not works. Stored procedures aren’t meant to return anything, use a function.
How to return a result set in PostgreSQL?
To return one or more result sets (cursors in terms of PostgreSQL), you have to use refcursor return type.
How to select an integer from a PostgreSQL query?
QUERY: SELECT id FROM spa (count) CONTEXT: PL/pgSQL function “conditional_relation_return” line 4 at RETURN QUERY Postgresql honors the column (s) name you choose from your RETURNS TABLE.
How to return a result set from a stored procedure?
PostgreSQL – How to Return a Result Set from a Stored Procedure Both stored procedures and user-defined functions are created with CREATE FUNCTION statement in PostgreSQL. PostgreSQL Stored Procedures and Functions – Getting Started To return one or more result sets (cursors in terms of PostgreSQL), you have to use refcursor return type.