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https://github.com/MariaDB/server.git
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MDEV-10581 sql_mode=ORACLE: Explicit cursor FOR LOOP
MDEV-12098 sql_mode=ORACLE: Implicit cursor FOR loop
This commit is contained in:
Alexander Barkov
@ -1029,11 +1029,11 @@ SHOW PROCEDURE CODE p1;
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Pos Instruction
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0 cpush cur1@0
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1 cpush cur2@1
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2 cursor_copy_struct rec1@0
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2 cursor_copy_struct cur1 rec1@0
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3 set rec1@0 NULL
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4 cursor_copy_struct rec2@1
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4 cursor_copy_struct cur1 rec2@1
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5 set rec2@1 NULL
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6 cursor_copy_struct rec3@2
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6 cursor_copy_struct cur2 rec3@2
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7 set rec3@2 NULL
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8 set rec1.a@0["a"] 10
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9 set rec1.b@0["b"] 'bbb'
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@ -1041,3 +1041,239 @@ Pos Instruction
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11 cpop 2
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DROP PROCEDURE p1;
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DROP TABLE t1;
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#
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# MDEV-10581 sql_mode=ORACLE: Explicit cursor FOR LOOP
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#
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CREATE PROCEDURE p1
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AS
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CURSOR cur0 IS SELECT 10 AS a, 'b0' AS b;
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CURSOR cur1 IS SELECT 10 AS a, 'b0' AS b;
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CURSOR cur2 IS SELECT 10 AS a, 'b0' AS b;
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BEGIN
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FOR rec1 IN cur1
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LOOP
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SELECT rec1.a, rec1.b;
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rec1.a:= 11;
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rec1.b:= 'b1';
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SELECT rec1.a, rec1.b;
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END LOOP;
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FOR rec0 IN cur0
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LOOP
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rec0.a:= 10;
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rec0.b:='b0';
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END LOOP;
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FOR rec2 IN cur2
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LOOP
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rec2.a:= 10;
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rec2.b:='b0';
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END LOOP;
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END;
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$$
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SHOW PROCEDURE CODE p1;
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Pos Instruction
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0 cpush cur0@0
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1 cpush cur1@1
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2 cpush cur2@2
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3 cursor_copy_struct cur1 rec1@0
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4 copen cur1@1
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5 cfetch cur1@1 rec1@0
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6 jump_if_not 13(13) "cur1"%FOUND
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7 stmt 0 "SELECT rec1.a, rec1.b"
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8 set rec1.a@0["a"] 11
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9 set rec1.b@0["b"] 'b1'
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10 stmt 0 "SELECT rec1.a, rec1.b"
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11 cfetch cur1@1 rec1@0
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12 jump 6
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13 cursor_copy_struct cur0 rec0@1
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14 copen cur0@0
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15 cfetch cur0@0 rec0@1
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16 jump_if_not 21(21) "cur0"%FOUND
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17 set rec0.a@1["a"] 10
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18 set rec0.b@1["b"] 'b0'
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19 cfetch cur0@0 rec0@1
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20 jump 16
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21 cursor_copy_struct cur2 rec2@2
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22 copen cur2@2
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23 cfetch cur2@2 rec2@2
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24 jump_if_not 29(29) "cur2"%FOUND
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25 set rec2.a@2["a"] 10
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26 set rec2.b@2["b"] 'b0'
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27 cfetch cur2@2 rec2@2
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28 jump 24
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29 cpop 3
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DROP PROCEDURE p1;
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CREATE PROCEDURE p1
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AS
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CURSOR cur0 IS SELECT 10 AS a, 'b0' AS b;
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BEGIN
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FOR rec0 IN cur0
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LOOP
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DECLARE
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CURSOR cur1 IS SELECT 11 AS a, 'b1' AS b;
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BEGIN
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rec0.a:= 11;
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rec0.b:= 'b0';
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FOR rec1 IN cur1
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LOOP
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rec1.a:= 11;
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rec1.b:= 'b1';
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DECLARE
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CURSOR cur2 IS SELECT 12 AS a, 'b2' AS b;
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BEGIN
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FOR rec2 IN cur2
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LOOP
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rec2.a:=12;
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rec2.b:='b2';
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END LOOP;
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END;
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END LOOP;
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END;
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END LOOP;
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END;
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$$
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SHOW PROCEDURE CODE p1;
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Pos Instruction
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0 cpush cur0@0
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1 cursor_copy_struct cur0 rec0@0
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2 copen cur0@0
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3 cfetch cur0@0 rec0@0
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4 jump_if_not 29(29) "cur0"%FOUND
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5 cpush cur1@1
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6 set rec0.a@0["a"] 11
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7 set rec0.b@0["b"] 'b0'
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8 cursor_copy_struct cur1 rec1@1
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9 copen cur1@1
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10 cfetch cur1@1 rec1@1
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11 jump_if_not 26(26) "cur1"%FOUND
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12 set rec1.a@1["a"] 11
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13 set rec1.b@1["b"] 'b1'
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14 cpush cur2@2
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15 cursor_copy_struct cur2 rec2@2
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16 copen cur2@2
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17 cfetch cur2@2 rec2@2
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18 jump_if_not 23(23) "cur2"%FOUND
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19 set rec2.a@2["a"] 12
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20 set rec2.b@2["b"] 'b2'
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21 cfetch cur2@2 rec2@2
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22 jump 18
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23 cpop 1
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24 cfetch cur1@1 rec1@1
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25 jump 11
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26 cpop 1
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27 cfetch cur0@0 rec0@0
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28 jump 4
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29 cpop 1
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DROP PROCEDURE p1;
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#
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# MDEV-12098 sql_mode=ORACLE: Implicit cursor FOR loop
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#
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CREATE PROCEDURE p1
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AS
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BEGIN
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FOR rec1 IN (SELECT 11 AS a, 'b1' AS b)
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LOOP
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SELECT rec1.a, rec1.b;
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rec1.a:= 11;
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rec1.b:= 'b1';
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SELECT rec1.a, rec1.b;
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END LOOP;
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FOR rec0 IN (SELECT 10 AS a, 'b0' AS b)
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LOOP
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rec0.a:= 10;
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rec0.b:='b0';
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END LOOP;
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FOR rec2 IN (SELECT 12 AS a, 'b2' AS b)
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LOOP
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rec2.a:= 10;
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rec2.b:='b0';
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END LOOP;
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END;
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$$
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SHOW PROCEDURE CODE p1;
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Pos Instruction
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0 cpush [implicit_cursor]@0
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1 cursor_copy_struct [implicit_cursor] rec1@0
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2 copen [implicit_cursor]@0
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3 cfetch [implicit_cursor]@0 rec1@0
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4 jump_if_not 11(11) "[implicit_cursor]"%FOUND
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5 stmt 0 "SELECT rec1.a, rec1.b"
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6 set rec1.a@0["a"] 11
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7 set rec1.b@0["b"] 'b1'
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8 stmt 0 "SELECT rec1.a, rec1.b"
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9 cfetch [implicit_cursor]@0 rec1@0
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10 jump 4
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11 cpop 1
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12 cpush [implicit_cursor]@0
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13 cursor_copy_struct [implicit_cursor] rec0@1
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14 copen [implicit_cursor]@0
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15 cfetch [implicit_cursor]@0 rec0@1
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16 jump_if_not 21(21) "[implicit_cursor]"%FOUND
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17 set rec0.a@1["a"] 10
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18 set rec0.b@1["b"] 'b0'
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19 cfetch [implicit_cursor]@0 rec0@1
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20 jump 16
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21 cpop 1
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22 cpush [implicit_cursor]@0
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23 cursor_copy_struct [implicit_cursor] rec2@2
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24 copen [implicit_cursor]@0
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25 cfetch [implicit_cursor]@0 rec2@2
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26 jump_if_not 31(31) "[implicit_cursor]"%FOUND
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27 set rec2.a@2["a"] 10
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28 set rec2.b@2["b"] 'b0'
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29 cfetch [implicit_cursor]@0 rec2@2
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30 jump 26
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31 cpop 1
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DROP PROCEDURE p1;
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CREATE PROCEDURE p1
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AS
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BEGIN
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FOR rec0 IN (SELECT 10 AS a, 'b0' AS b)
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LOOP
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rec0.a:= 11;
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rec0.b:= 'b0';
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FOR rec1 IN (SELECT 11 AS a, 'b1' AS b)
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LOOP
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rec1.a:= 11;
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rec1.b:= 'b1';
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FOR rec2 IN (SELECT 12 AS a, 'b2' AS b)
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LOOP
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rec2.a:=12;
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rec2.b:='b2';
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END LOOP;
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END LOOP;
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END LOOP;
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END;
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$$
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SHOW PROCEDURE CODE p1;
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Pos Instruction
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0 cpush [implicit_cursor]@0
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1 cursor_copy_struct [implicit_cursor] rec0@0
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2 copen [implicit_cursor]@0
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3 cfetch [implicit_cursor]@0 rec0@0
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4 jump_if_not 29(29) "[implicit_cursor]"%FOUND
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5 set rec0.a@0["a"] 11
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6 set rec0.b@0["b"] 'b0'
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7 cpush [implicit_cursor]@1
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8 cursor_copy_struct [implicit_cursor] rec1@1
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9 copen [implicit_cursor]@1
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10 cfetch [implicit_cursor]@1 rec1@1
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11 jump_if_not 26(26) "[implicit_cursor]"%FOUND
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12 set rec1.a@1["a"] 11
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13 set rec1.b@1["b"] 'b1'
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14 cpush [implicit_cursor]@2
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15 cursor_copy_struct [implicit_cursor] rec2@2
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16 copen [implicit_cursor]@2
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17 cfetch [implicit_cursor]@2 rec2@2
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18 jump_if_not 23(23) "[implicit_cursor]"%FOUND
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19 set rec2.a@2["a"] 12
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20 set rec2.b@2["b"] 'b2'
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21 cfetch [implicit_cursor]@2 rec2@2
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22 jump 18
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23 cpop 1
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24 cfetch [implicit_cursor]@1 rec1@1
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25 jump 11
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26 cpop 1
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27 cfetch [implicit_cursor]@0 rec0@0
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28 jump 4
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29 cpop 1
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DROP PROCEDURE p1;
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@ -976,3 +976,328 @@ HEX(rec1.c)
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C3BF61
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DROP PROCEDURE p1;
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DROP TABLE t1;
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#
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# MDEV-10581 sql_mode=ORACLE: Explicit cursor FOR LOOP
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#
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# IN followed by a non-identifier
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CREATE PROCEDURE p1 AS
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CURSOR c1 IS SELECT 'test' AS a FROM DUAL;
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BEGIN
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FOR rec IN 10
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LOOP
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NULL;
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END LOOP;
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END;
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$$
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ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'LOOP
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NULL;
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END LOOP;
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END' at line 6
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# IN followed by a quoted identifier: table.column
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CREATE PROCEDURE p1 AS
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CURSOR c1 IS SELECT 'test' AS a FROM DUAL;
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BEGIN
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FOR rec IN c1.c2
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LOOP
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NULL;
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END LOOP;
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END;
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$$
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ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'LOOP
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NULL;
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END LOOP;
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END' at line 6
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# IN followed by a quoted identifier: .table.column
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CREATE PROCEDURE p1 AS
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CURSOR c1 IS SELECT 'test' AS a FROM DUAL;
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BEGIN
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FOR rec IN .c1.c2
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LOOP
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NULL;
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END LOOP;
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END;
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$$
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ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'LOOP
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NULL;
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END LOOP;
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END' at line 6
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# IN followed by a quoted identifier: schema.table.column
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CREATE PROCEDURE p1 AS
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CURSOR c1 IS SELECT 'test' AS a FROM DUAL;
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BEGIN
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FOR rec IN c1.c2.c3
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LOOP
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NULL;
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END LOOP;
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END;
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$$
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ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'LOOP
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NULL;
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END LOOP;
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END' at line 6
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# IN followed by an unknown cursor name
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CREATE PROCEDURE p1 AS
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CURSOR c1 IS SELECT 'test' AS a FROM DUAL;
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BEGIN
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FOR rec IN c2
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LOOP
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NULL;
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END LOOP;
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END;
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$$
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ERROR 42000: Undefined CURSOR: c2
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# Make sure "rec" shadows other declarations outside the loop
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CREATE TABLE t1 (a INT, b VARCHAR(10));
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INSERT INTO t1 VALUES (10, 'b0');
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CREATE PROCEDURE p1 AS
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rec INT:=10;
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CURSOR c1 IS SELECT a,b FROM t1;
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BEGIN
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FOR rec IN c1
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LOOP
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SELECT rec.a;
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END LOOP;
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SELECT rec;
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END;
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$$
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CALL p1;
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rec.a
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10
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rec
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10
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DROP PROCEDURE p1;
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DROP TABLE t1;
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# Make sure "rec" is not visible after END LOOP
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CREATE PROCEDURE p1 AS
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CURSOR c1 IS SELECT 'test' AS a FROM DUAL;
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BEGIN
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FOR rec IN c1
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LOOP
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NULL;
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END LOOP;
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rec.a:= 10;
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END;
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$$
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ERROR HY000: Unknown structured system variable or ROW routine variable 'rec'
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# Make sure that duplicate column names are not allowed
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CREATE PROCEDURE p1 AS
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CURSOR cur IS SELECT 'a' AS a, 'A' as a;
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BEGIN
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FOR rec IN cur
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LOOP
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NULL;
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END LOOP;
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END;
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$$
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CALL p1;
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ERROR 42S21: Duplicate column name 'a'
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DROP PROCEDURE p1;
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# A complete working example
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CREATE TABLE t1 (a INT, b VARCHAR(10));
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INSERT INTO t1 VALUES (10,'b0');
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INSERT INTO t1 VALUES (11,'b1');
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INSERT INTO t1 VALUES (12,'b2');
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CREATE TABLE t2 LIKE t1;
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CREATE TABLE t3 LIKE t1;
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CREATE PROCEDURE p1 AS
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CURSOR cur IS SELECT a, b FROM t1;
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BEGIN
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FOR rec IN cur
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LOOP
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SELECT rec.a, rec.b;
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INSERT INTO t2 VALUES (rec.a, rec.b);
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rec.a:= rec.a + 1000;
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rec.b:= 'b' || rec.b;
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INSERT INTO t3 VALUES (rec.a, rec.b);
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END LOOP;
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END;
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$$
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CALL p1();
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rec.a rec.b
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10 b0
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rec.a rec.b
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11 b1
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rec.a rec.b
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12 b2
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SELECT * FROM t2;
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a b
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10 b0
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11 b1
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12 b2
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SELECT * FROM t3;
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a b
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1010 bb0
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1011 bb1
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1012 bb2
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DROP PROCEDURE p1;
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DROP TABLE t3;
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DROP TABLE t2;
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DROP TABLE t1;
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#
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# MDEV-12098 sql_mode=ORACLE: Implicit cursor FOR loop
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#
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# Parse error in the cursor SELECT statement
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CREATE PROCEDURE p1 AS
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BEGIN
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FOR rec IN (SELECT a, b FROM)
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LOOP
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SELECT rec.a, rec.b;
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||||
END LOOP;
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||||
END;
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||||
$$
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ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ')
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LOOP
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SELECT rec.a, rec.b;
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||||
END LOOP;
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END' at line 3
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# Make sure "rec" is not visible after END LOOP
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CREATE PROCEDURE p1 AS
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BEGIN
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FOR rec IN (SELECT 'test' AS a)
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||||
LOOP
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||||
NULL;
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||||
END LOOP;
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rec.a:= 10;
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||||
END;
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||||
$$
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ERROR HY000: Unknown structured system variable or ROW routine variable 'rec'
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||||
# Make sure "rec" is not visible inside the SELECT statement
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||||
CREATE PROCEDURE p1 AS
|
||||
BEGIN
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||||
FOR rec IN (SELECT rec)
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||||
LOOP
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||||
NULL;
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||||
END LOOP;
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||||
END;
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||||
$$
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CALL p1;
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ERROR 42S22: Unknown column 'rec' in 'field list'
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DROP PROCEDURE p1;
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CREATE PROCEDURE p1 AS
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||||
BEGIN
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FOR rec IN (SELECT rec.a)
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||||
LOOP
|
||||
NULL;
|
||||
END LOOP;
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||||
END;
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||||
$$
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||||
CALL p1;
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||||
ERROR 42S02: Unknown table 'rec' in field list
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||||
DROP PROCEDURE p1;
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||||
# Totally confusing name mixture
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||||
CREATE TABLE rec (rec INT);
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||||
INSERT INTO rec VALUES (10);
|
||||
CREATE PROCEDURE p1 AS
|
||||
BEGIN
|
||||
FOR rec IN (SELECT rec FROM rec)
|
||||
LOOP
|
||||
SELECT rec.rec;
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||||
END LOOP;
|
||||
END;
|
||||
$$
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||||
CALL p1;
|
||||
rec.rec
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||||
10
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||||
DROP PROCEDURE p1;
|
||||
DROP TABLE rec;
|
||||
# Make sure that duplicate column names are not allowed
|
||||
CREATE PROCEDURE p1 AS
|
||||
BEGIN
|
||||
FOR rec IN (SELECT 'a' AS a, 'A' as a)
|
||||
LOOP
|
||||
NULL;
|
||||
END LOOP;
|
||||
END;
|
||||
$$
|
||||
CALL p1;
|
||||
ERROR 42S21: Duplicate column name 'a'
|
||||
DROP PROCEDURE p1;
|
||||
# A complete working example
|
||||
CREATE TABLE t1 (a INT, b VARCHAR(10));
|
||||
INSERT INTO t1 VALUES (10,'b0');
|
||||
INSERT INTO t1 VALUES (11,'b1');
|
||||
INSERT INTO t1 VALUES (12,'b2');
|
||||
CREATE TABLE t2 LIKE t1;
|
||||
CREATE TABLE t3 LIKE t1;
|
||||
CREATE PROCEDURE p1 AS
|
||||
BEGIN
|
||||
FOR rec IN (SELECT a, b FROM t1)
|
||||
LOOP
|
||||
SELECT rec.a, rec.b;
|
||||
INSERT INTO t2 VALUES (rec.a, rec.b);
|
||||
rec.a:= rec.a + 1000;
|
||||
rec.b:= 'b'|| rec.b;
|
||||
INSERT INTO t3 VALUES (rec.a, rec.b);
|
||||
END LOOP;
|
||||
END;
|
||||
$$
|
||||
CALL p1();
|
||||
rec.a rec.b
|
||||
10 b0
|
||||
rec.a rec.b
|
||||
11 b1
|
||||
rec.a rec.b
|
||||
12 b2
|
||||
SELECT * FROM t2;
|
||||
a b
|
||||
10 b0
|
||||
11 b1
|
||||
12 b2
|
||||
SELECT * FROM t3;
|
||||
a b
|
||||
1010 bb0
|
||||
1011 bb1
|
||||
1012 bb2
|
||||
DROP PROCEDURE p1;
|
||||
DROP TABLE t3;
|
||||
DROP TABLE t2;
|
||||
DROP TABLE t1;
|
||||
# A combination of explicit and implicit cursors
|
||||
CREATE TABLE t1 (a INT, b VARCHAR(10));
|
||||
INSERT INTO t1 VALUES (10,'b1');
|
||||
INSERT INTO t1 VALUES (11,'b2');
|
||||
INSERT INTO t1 VALUES (12,'b3');
|
||||
CREATE PROCEDURE p1 AS
|
||||
BEGIN
|
||||
FOR rec1 IN (SELECT a, b FROM t1)
|
||||
LOOP
|
||||
DECLARE
|
||||
CURSOR cur2 IS SELECT a+1000 AS a, 'bb'||b AS b FROM t1 WHERE a=rec1.a AND b=rec1.b;
|
||||
BEGIN
|
||||
SELECT rec1.a, rec1.b;
|
||||
FOR rec2 IN cur2
|
||||
LOOP
|
||||
SELECT rec2.a, rec2.b;
|
||||
END LOOP;
|
||||
END;
|
||||
END LOOP;
|
||||
FOR rec1 IN (SELECT a,b FROM t1)
|
||||
LOOP
|
||||
FOR rec2 IN (SELECT a+2000 AS a,'bbb'||b AS b FROM t1 WHERE a=rec1.a AND b=rec1.b)
|
||||
LOOP
|
||||
SELECT rec2.a, rec2.b;
|
||||
END LOOP;
|
||||
END LOOP;
|
||||
END;
|
||||
$$
|
||||
CALL p1();
|
||||
rec1.a rec1.b
|
||||
10 b1
|
||||
rec2.a rec2.b
|
||||
1010 bbb1
|
||||
rec1.a rec1.b
|
||||
11 b2
|
||||
rec2.a rec2.b
|
||||
1011 bbb2
|
||||
rec1.a rec1.b
|
||||
12 b3
|
||||
rec2.a rec2.b
|
||||
1012 bbb3
|
||||
rec2.a rec2.b
|
||||
2010 bbbb1
|
||||
rec2.a rec2.b
|
||||
2011 bbbb2
|
||||
rec2.a rec2.b
|
||||
2012 bbbb3
|
||||
DROP PROCEDURE p1;
|
||||
DROP TABLE t1;
|
||||
|
||||
Reference in New Issue
Block a user