DROP PROCEDURE IF EXISTS proc_19194_codegen;
DROP PROCEDURE IF EXISTS bug_19194_simple;
DROP PROCEDURE IF EXISTS bug_19194_searched;
CREATE PROCEDURE proc_19194_codegen(
IN proc_name VARCHAR(50),
IN count INTEGER,
IN simple INTEGER,
OUT body MEDIUMTEXT)
BEGIN
DECLARE code MEDIUMTEXT;
DECLARE i INT DEFAULT 1;
SET code = concat("CREATE PROCEDURE ", proc_name, "(i INT)\n");
SET code = concat(code, "BEGIN\n");
SET code = concat(code, "  DECLARE str CHAR(10);\n");
IF (simple)
THEN
SET code = concat(code, "  CASE i\n");
ELSE
SET code = concat(code, "  CASE\n");
END IF;
WHILE (i <= count)
DO
IF (simple)
THEN
SET code = concat(code, "    WHEN ", i, " THEN SET str=\"", i, "\";\n");
ELSE
SET code = concat(code, "    WHEN i=", i, " THEN SET str=\"", i, "\";\n");
END IF;
SET i = i + 1;
END WHILE;
SET code = concat(code, "    ELSE SET str=\"unknown\";\n");
SET code = concat(code, "  END CASE;\n");
SET code = concat(code, "  SELECT str;\n");
SET code = concat(code, "END\n");
SET body = code;
END|
set @body="";
call proc_19194_codegen("test_simple", 10, 1, @body);
select @body;
@body
CREATE PROCEDURE test_simple(i INT)
BEGIN
  DECLARE str CHAR(10);
  CASE i
    WHEN 1 THEN SET str="1";
    WHEN 2 THEN SET str="2";
    WHEN 3 THEN SET str="3";
    WHEN 4 THEN SET str="4";
    WHEN 5 THEN SET str="5";
    WHEN 6 THEN SET str="6";
    WHEN 7 THEN SET str="7";
    WHEN 8 THEN SET str="8";
    WHEN 9 THEN SET str="9";
    WHEN 10 THEN SET str="10";
    ELSE SET str="unknown";
  END CASE;
  SELECT str;
END

call proc_19194_codegen("test_searched", 10, 0, @body);
select @body;
@body
CREATE PROCEDURE test_searched(i INT)
BEGIN
  DECLARE str CHAR(10);
  CASE
    WHEN i=1 THEN SET str="1";
    WHEN i=2 THEN SET str="2";
    WHEN i=3 THEN SET str="3";
    WHEN i=4 THEN SET str="4";
    WHEN i=5 THEN SET str="5";
    WHEN i=6 THEN SET str="6";
    WHEN i=7 THEN SET str="7";
    WHEN i=8 THEN SET str="8";
    WHEN i=9 THEN SET str="9";
    WHEN i=10 THEN SET str="10";
    ELSE SET str="unknown";
  END CASE;
  SELECT str;
END

CALL bug_19194_simple(1);
str
1
CALL bug_19194_simple(2);
str
2
CALL bug_19194_simple(1000);
str
1000
CALL bug_19194_simple(4998);
str
4998
CALL bug_19194_simple(4999);
str
4999
CALL bug_19194_simple(9999);
str
unknown
CALL bug_19194_searched(1);
str
1
CALL bug_19194_searched(2);
str
2
CALL bug_19194_searched(1000);
str
1000
CALL bug_19194_searched(4998);
str
4998
CALL bug_19194_searched(4999);
str
4999
CALL bug_19194_searched(9999);
str
unknown
DROP PROCEDURE proc_19194_codegen;
DROP PROCEDURE bug_19194_simple;
DROP PROCEDURE bug_19194_searched;