B4BY.588

: / usr / share / mysql-test / t /
Filename : sp_stress_case.test
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#
# Bug#19194 (Right recursion in parser for CASE causes excessive stack
#   usage, limitation)
#

--disable_warnings
DROP PROCEDURE IF EXISTS proc_19194_codegen;
DROP PROCEDURE IF EXISTS bug_19194_simple;
DROP PROCEDURE IF EXISTS bug_19194_searched;
--enable_warnings

delimiter |;

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|

delimiter ;|

set @body="";
call proc_19194_codegen("test_simple", 10, 1, @body);
select @body;
call proc_19194_codegen("test_searched", 10, 0, @body);
select @body;

--disable_query_log
call proc_19194_codegen("bug_19194_simple", 5000, 1, @body);
let $proc_body = `select @body`;
eval $proc_body;
call proc_19194_codegen("bug_19194_searched", 5000, 1, @body);
let $proc_body = `select @body`;
eval $proc_body;
--enable_query_log

CALL bug_19194_simple(1);
CALL bug_19194_simple(2);
CALL bug_19194_simple(1000);
CALL bug_19194_simple(4998);
CALL bug_19194_simple(4999);
CALL bug_19194_simple(9999);

CALL bug_19194_searched(1);
CALL bug_19194_searched(2);
CALL bug_19194_searched(1000);
CALL bug_19194_searched(4998);
CALL bug_19194_searched(4999);
CALL bug_19194_searched(9999);

DROP PROCEDURE proc_19194_codegen;
DROP PROCEDURE bug_19194_simple;
DROP PROCEDURE bug_19194_searched;