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Alexander Barkov 4b61495576 MDEV-10411 Providing compatibility for basic PL/SQL constructs
Part 9: EXCEPTION handlers

EXCEPTION is now supported in inner blocks.
2017-04-05 15:02:43 +04:00

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SET sql_mode=ORACLE;
#
# Testing exceptions in the top-level blocks
#
# No HANDLER declarations, no exceptions
CREATE FUNCTION f1 RETURN INT
AS
BEGIN
RETURN 10;
END;
/
SHOW FUNCTION CODE f1;
Pos Instruction
0 freturn 3 10
SELECT f1();
f1()
10
DROP FUNCTION f1;
# No HANDLER declarations, no code, no exceptions
CREATE PROCEDURE p1 ()
IS
BEGIN
END;
/
SHOW PROCEDURE CODE p1;
Pos Instruction
0 jump 2
CALL p1;
DROP PROCEDURE p1;
# No HANDLER declarations, no code, some exceptions
CREATE PROCEDURE p1 (v IN OUT INT)
IS
BEGIN
EXCEPTION
WHEN 1002 THEN v:=225;
END;
/
SHOW PROCEDURE CODE p1;
Pos Instruction
0 jump 1
1 hpush_jump 4 1 EXIT
2 set v@0 225
3 hreturn 0 4
4 hpop 1
set @v= 10;
CALL p1(@v);
SELECT @v;
@v
10
DROP PROCEDURE p1;
# No HANDLER declarations, some code, some exceptions
CREATE PROCEDURE p1 (v IN OUT INT)
IS
BEGIN
v:=224;
EXCEPTION
WHEN 1002 THEN v:=225;
END;
/
SHOW PROCEDURE CODE p1;
Pos Instruction
0 jump 3
1 set v@0 224
2 jump 6
3 hpush_jump 1 1 EXIT
4 set v@0 225
5 hreturn 0 6
6 hpop 1
set @v= 10;
CALL p1(@v);
SELECT @v;
@v
224
DROP PROCEDURE p1;
# Some HANDLER declarations, no code, no exceptions
CREATE PROCEDURE p1 (v IN OUT INT)
IS
EXIT HANDLER FOR 1000
BEGIN
v:=123;
END;
BEGIN
END;
/
SHOW PROCEDURE CODE p1;
Pos Instruction
0 hpush_jump 3 1 EXIT
1 set v@0 123
2 hreturn 0 3
3 hpop 1
set @v= 10;
CALL p1(@v);
SELECT @v;
@v
10
DROP PROCEDURE p1;
# Some HANDLER declarations, no code, some exceptions
CREATE PROCEDURE p1 (v IN OUT INT)
IS
EXIT HANDLER FOR 1000
BEGIN
v:=123;
END;
BEGIN
EXCEPTION
WHEN 1002 THEN v:=225;
END;
/
SHOW PROCEDURE CODE p1;
Pos Instruction
0 hpush_jump 3 1 EXIT
1 set v@0 123
2 hreturn 0 6
3 hpush_jump 6 1 EXIT
4 set v@0 225
5 hreturn 0 6
6 hpop 2
set @v= 10;
CALL p1(@v);
SELECT @v;
@v
10
DROP PROCEDURE p1;
# Some HANDLER declarations, some code, no exceptions
CREATE PROCEDURE p1 (v IN OUT INT)
IS
EXIT HANDLER FOR 1000
BEGIN
v:=123;
END;
BEGIN
v:=223;
END;
/
SHOW PROCEDURE CODE p1;
Pos Instruction
0 hpush_jump 3 1 EXIT
1 set v@0 123
2 hreturn 0 4
3 set v@0 223
4 hpop 1
set @v= 10;
CALL p1(@v);
SELECT @v;
@v
223
DROP PROCEDURE p1;
# Some HANDLER declarations, some code, some exceptions
CREATE PROCEDURE p1 (v IN OUT VARCHAR2(20))
IS
EXIT HANDLER FOR 1000
BEGIN
v:=123;
END;
CONTINUE HANDLER FOR 1001
BEGIN
SET v=223;
END;
BEGIN
v:= 1;
EXCEPTION
WHEN 1002 THEN SET v=225;
END;
/
SHOW PROCEDURE CODE p1;
Pos Instruction
0 hpush_jump 3 1 EXIT
1 set v@0 123
2 hreturn 0 12
3 hpush_jump 8 1 CONTINUE
4 set v@0 223
5 hreturn 1
6 set v@0 1
7 jump 12
8 hpush_jump 6 1 EXIT
9 set v@0 225
10 hreturn 0 12
11 jump 6
12 hpop 3
DROP PROCEDURE p1;
#
# Testing EXCEPTIONS in internal blocks
#
# No HANDLER declarations, no code, no exceptions
CREATE PROCEDURE p1 (v IN OUT INT)
IS
BEGIN
v:=123;
BEGIN
END;
END;
/
SHOW PROCEDURE CODE p1;
Pos Instruction
0 set v@0 123
1 jump 5
SET @v=10;
CALL p1(@v);
SELECT @v;
@v
123
DROP PROCEDURE p1;
# No HANDLER declarations, no code, some exceptions
CREATE PROCEDURE p1 (v IN OUT INT)
IS
BEGIN
v:=123;
BEGIN
EXCEPTION
WHEN 20002 THEN v:=335;
END;
END;
/
SHOW PROCEDURE CODE p1;
Pos Instruction
0 set v@0 123
1 jump 2
2 hpush_jump 5 1 EXIT
3 set v@0 335
4 hreturn 0 5
5 hpop 1
SET @v=10;
CALL p1(@v);
SELECT @v;
@v
123
DROP PROCEDURE p1;
# No HANDLER declarations, some code, no exceptions
CREATE PROCEDURE p1 (v IN OUT INT)
IS
BEGIN
v:=123;
BEGIN
v:=223;
END;
END;
/
SHOW PROCEDURE CODE p1;
Pos Instruction
0 set v@0 123
1 set v@0 223
2 jump 6
SET @v=10;
CALL p1(@v);
SELECT @v;
@v
223
DROP PROCEDURE p1;
# No HANDLER declarations, some code, some exceptions
CREATE PROCEDURE p1 (v IN OUT INT)
IS
BEGIN
v:=123;
BEGIN
v:=223;
EXCEPTION
WHEN 20002 THEN v:=335;
END;
END;
/
SHOW PROCEDURE CODE p1;
Pos Instruction
0 set v@0 123
1 jump 4
2 set v@0 223
3 jump 7
4 hpush_jump 2 1 EXIT
5 set v@0 335
6 hreturn 0 7
7 hpop 1
SET @v=10;
CALL p1(@v);
SELECT @v;
@v
223
DROP PROCEDURE p1;
# Some HANDLER declarations, no code, no exceptions
CREATE PROCEDURE p1 (v IN OUT INT)
IS
BEGIN
v:=123;
DECLARE
EXIT HANDLER FOR 1000
BEGIN
v:=323;
END;
BEGIN
END;
END;
/
SHOW PROCEDURE CODE p1;
Pos Instruction
0 set v@0 123
1 hpush_jump 4 1 EXIT
2 set v@0 323
3 hreturn 0 4
4 hpop 1
SET @v=10;
CALL p1(@v);
SELECT @v;
@v
123
DROP PROCEDURE p1;
# Some HANDLER declarations, no code, some exceptions
CREATE PROCEDURE p1 (v IN OUT INT)
IS
BEGIN
v:=123;
DECLARE
EXIT HANDLER FOR 1000
BEGIN
v:=323;
END;
BEGIN
EXCEPTION
WHEN 20002 THEN v:=335;
END;
END;
/
SHOW PROCEDURE CODE p1;
Pos Instruction
0 set v@0 123
1 hpush_jump 4 1 EXIT
2 set v@0 323
3 hreturn 0 7
4 hpush_jump 7 1 EXIT
5 set v@0 335
6 hreturn 0 7
7 hpop 2
SET @v=10;
CALL p1(@v);
SELECT @v;
@v
123
DROP PROCEDURE p1;
# Some HANDLER declarations, some code, no exceptions
CREATE PROCEDURE p1 (v IN OUT INT)
IS
BEGIN
v:=123;
DECLARE
EXIT HANDLER FOR 1000
BEGIN
v:=323;
END;
BEGIN
v:= 324;
END;
END;
/
SHOW PROCEDURE CODE p1;
Pos Instruction
0 set v@0 123
1 hpush_jump 4 1 EXIT
2 set v@0 323
3 hreturn 0 5
4 set v@0 324
5 hpop 1
SET @v=10;
CALL p1(@v);
SELECT @v;
@v
324
DROP PROCEDURE p1;
# Some HANDLER declarations, some code, some exceptions
CREATE PROCEDURE p1 (v IN OUT INT)
IS
BEGIN
v:=123;
DECLARE
EXIT HANDLER FOR 1000
BEGIN
v:=323;
END;
BEGIN
v:= 324;
EXCEPTION WHEN 2002 THEN v:= 325;
END;
END;
/
SHOW PROCEDURE CODE p1;
Pos Instruction
0 set v@0 123
1 hpush_jump 6 1 EXIT
2 set v@0 323
3 hreturn 0 9
4 set v@0 324
5 jump 9
6 hpush_jump 4 1 EXIT
7 set v@0 325
8 hreturn 0 9
9 hpop 2
SET @v=10;
CALL p1(@v);
SELECT @v;
@v
324
DROP PROCEDURE p1;