Bug#33851 Passing UNSIGNED param to EXECUTE returns ERROR 1210

The problem is that passing anything other than a integer to a limit
clause in a prepared statement would fail. This limitation was introduced
to avoid replication problems (e.g: replicating the statement with a
string argument would cause a parse failure in the slave).

The solution is to convert arguments to the limit clause to a integer
value and use this converted value when persisting the query to the log.


mysql-test/r/limit.result:
  Update test case result.
mysql-test/r/ps.result:
  Add test case result for Bug#33851
mysql-test/r/rpl_user_variables.result:
  Test case result for replication of prepared statement with
  limit clause.
mysql-test/t/limit.test:
  Test parameters to limit clause.
mysql-test/t/ps.test:
  Add test case for Bug#33851
mysql-test/t/rpl_user_variables.test:
  Test replication of a parameter which value is converted.
sql/item.cc:
  Convert value to integer if it's a parameter to a limit clause.
sql/item.h:
  Flag signal that item is a parameter to a limit clause.
sql/item_func.cc:
  Const member functions, object is not mutated.
sql/sql_class.h:
  Const member functions, object is not mutated.
sql/sql_yacc.yy:
  Flag that item is a parameter to a limit clause.

mysql-test/r/limit.result

@@ -94,6 +94,9 @@ drop table t1;
 prepare s from "select 1 limit ?";
 set @a='qwe';
 execute s using @a;
+1
+set @a=-1;
+execute s using @a;
 ERROR HY000: Incorrect arguments to EXECUTE
 prepare s from "select 1 limit 1, ?";
 execute s using @a;
@@ -101,4 +104,10 @@ ERROR HY000: Incorrect arguments to EXECUTE
 prepare s from "select 1 limit ?, ?";
 execute s using @a, @a;
 ERROR HY000: Incorrect arguments to EXECUTE
+set @a=14632475938453979136;
+execute s using @a, @a;
+1
+set @a=-14632475938453979136;
+execute s using @a, @a;
+ERROR HY000: Incorrect arguments to EXECUTE
 End of 5.0 tests

mysql-test/r/ps.result

@@ -1861,4 +1861,34 @@ prepare stmt from "create view v1 as select * from t1";
 ERROR 42S02: Table 'test.t1' doesn't exist
 prepare stmt from "create view v1 as select * from `t1` `b`";
 ERROR 42S02: Table 'test.t1' doesn't exist
+prepare stmt from "select ?";
+set @arg= 123456789.987654321;
+select @arg;
+@arg
+123456789.987654321
+execute stmt using @arg;
+?
+123456789.987654321
+set @arg= "string";
+select @arg;
+@arg
+string
+execute stmt using @arg;
+?
+string
+set @arg= 123456;
+select @arg;
+@arg
+123456
+execute stmt using @arg;
+?
+123456
+set @arg= cast(-12345.54321 as decimal(20, 10));
+select @arg;
+@arg
+-12345.5432100000
+execute stmt using @arg;
+?
+-12345.5432100000
+deallocate prepare stmt;
 End of 5.0 tests.

mysql-test/r/rpl_user_variables.result

@@ -290,6 +290,22 @@ select * from t1;
 a	b
 2	1
 drop table t1;
+create table t1(a int);
+insert into t1 values (1),(2);
+prepare s1 from 'insert into t1 select a from t1 limit ?';
+set @x='1.1';
+execute s1 using @x;
+select * from t1;
+a
+1
+2
+1
+select * from t1;
+a
+1
+2
+1
+drop table t1;
 End of 5.0 tests.
 DROP FUNCTION IF EXISTS f1;
 DROP FUNCTION IF EXISTS f2;