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Updated on 2024-05-07 GMT+08:00
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Call Statements

Syntax

Figure 1 shows the syntax diagram for calling a clause.

Figure 1 call_clause::=

The above syntax diagram is explained as follows:

  • procedure_name specifies the name of a stored procedure.
  • parameter specifies the parameters for the stored procedure. You can set no parameter or multiple parameters.

Examples

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gaussdb=# CREATE TABLE staffs  (   section_id INTEGER,    salary INTEGER ); 
CREATE TABLE
gaussdb=# INSERT INTO staffs VALUES (30, 10); 
INSERT 0 1
gaussdb=# INSERT INTO staffs VALUES (30, 20);
INSERT 0 1

-- Create the stored procedure proc_staffs.
gaussdb=# CREATE OR REPLACE PROCEDURE proc_staffs
(
section     NUMBER(6),
salary_sum out NUMBER(8,2),
staffs_count out INTEGER
)
IS
BEGIN
SELECT sum(salary), count(*) INTO salary_sum, staffs_count FROM staffs where section_id = section;
END;
/
CREATE PROCEDURE

-- Call the stored procedure proc_return.
gaussdb=# CALL proc_staffs(2,8,6);
 salary_sum | staffs_count 
------------+--------------
            |            0
(1 row)


-- Drop the stored procedure.
gaussdb=# DROP PROCEDURE proc_staffs;
DROP PROCEDURE
Parent topic: Basic Statements