core/sql/regress/newregr/triggers/TEST_SPJC_FUNC_008

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-- HL_R2_Triggers_Spec.doc: SPJ enhancements to Triggers
-- CS with multiple trigger events some of which are recursive.
-- Result: Success
--control query default ATTEMPT_ESP_PARALLELISM 'OFF';

obey TEST_SPJC_FUNC_008(clean_up);
obey TEST_SPJC_FUNC_008(set_up);
log  LOG_SPJC_FUNC_008 clear;
obey TEST_SPJC_FUNC_008(tests);
LOG;
obey TEST_SPJC_FUNC_008(clean_up);
exit;

?section clean_up
set schema CAT1.SCHM;


drop trigger TRIG01_SPJC_FUNC_008;
drop trigger TRIG02_SPJC_FUNC_008;
drop trigger TRIG03_SPJC_FUNC_008;

drop table TAB01_SPJC_FUNC_008;
drop table TAB02_SPJC_FUNC_008;
drop table TAB03_SPJC_FUNC_008;

?section set_up
set schema CAT1.SCHM;

SET ENVVAR ALLOW_CS_IN_SQLCI 1;
CONTROL QUERY DEFAULT POS 'OFF';

create table TAB01_SPJC_FUNC_008(a int, b int, c int, d int);
create table TAB02_SPJC_FUNC_008(a int, b int, c int, d int);
create table TAB03_SPJC_FUNC_008(a int, b int, c int, d int);

INSERT INTO TAB01_SPJC_FUNC_008 VALUES (1, 2, 3, 4),
				(8, 6, 4, 2),
				(3, 6, 9, 12),
				(3, 6, 9, 12),
				(3, 6, 9, 12);

?section tests

------------------------------------------------------------------
-- TEST CASE 01: Combination of a recursive and non recursive trigger
-- Result: Success
------------------------------------------------------------------

-- TRIG01_SPJC_FUNC_008 and TRIG02_SPJC_FUNC_008 fire each other
CREATE TRIGGER TRIG01_SPJC_FUNC_008 AFTER DELETE ON
TAB01_SPJC_FUNC_008
REFERENCING OLD ROW AS O
FOR EACH ROW
	INSERT INTO TAB02_SPJC_FUNC_008 VALUES (O.A, O.B, O.C, O.D);

CREATE TRIGGER TRIG02_SPJC_FUNC_008 AFTER INSERT ON
TAB02_SPJC_FUNC_008
REFERENCING NEW ROW AS N
FOR EACH ROW
	DELETE FROM TAB01_SPJC_FUNC_008
		WHERE TAB01_SPJC_FUNC_008.D = N.A + N.D + 2;

-- TRIG03_SPJC_FUNC_008 is non recursive
CREATE TRIGGER TRIG03_SPJC_FUNC_008 AFTER UPDATE ON
TAB01_SPJC_FUNC_008
REFERENCING NEW ROW AS N, OLD ROW AS O
FOR EACH ROW
	INSERT INTO TAB03_SPJC_FUNC_008 VALUES (O.A, O.B, O.C, O.D);

------------------------------------------------------------------

-- original table
select * from TAB01_SPJC_FUNC_008;

-- The tests

BEGIN
-- Triggers an insert of old values into TAB02_SPJC_FUNC_008
-- which in turn deletes rows with D = 12, effectively
-- deleting all except one row in TAB01_SPJC_FUNC_008
-- Raises a warning that trigger may be triggered recursively more
-- than 16 times
	DELETE FROM TAB01_SPJC_FUNC_008 where a = 8;

--  fires non recursive trigger
	UPDATE TAB01_SPJC_FUNC_008 set a = a + 100;
END;


-- Result: TAB01_SPJC_FUNC_008 has one row
select * from TAB01_SPJC_FUNC_008;

-- Result: TAB02_SPJC_FUNC_008 has four rows
select * from TAB02_SPJC_FUNC_008;

-- Result: TAB03_SPJC_FUNC_008 has one row
select * from TAB03_SPJC_FUNC_008;
------------------------------------------------------------------