Call or invoke a stored procedure

To invoke or execute the sample stored procedure customer(), you can use any of the following SQL query forms:

TEST.TESTSCH(USR)=> CALL customer(); 
TEST.TESTSCH(USR)=> EXEC customer();
TEST.TESTSCH(USR)=> EXECUTE customer();
TEST.TESTSCH(USR)=> EXECUTE PROCEDURE customer();
TEST.TESTSCH(USR)=> SELECT customer();

Any of these commands cause the procedure to output the following:

NOTICE:  The customer name is alpha
 CUSTOMER
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(1 row)