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Bug#20777 Function w BIGINT UNSIGNED shows diff. behaviour with and without --ps-protocol

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- Stored procedures returning unsinged values returns signed values if
  text protocol is used. The reason is that the stored proceedure item
  Item_func_sp wasn't initializing the member variables properly based
  on the information contained in the associated result field.
- The patch is to upon field-item association, ::fix_fields, initialize
  the member variables in appropriate order.
- Field type of an Item_func_sp was hard coded to MYSQL_TYPE_VARCHAR.
  This is changed to return the type of the actual result field.
- Member function name sp_result_field was refactored to the more 
  appropriate init_result_field.
- Member function name find_and_check_access was refactored to 
  sp_check_access.


mysql-test/r/sp.result:
  - Added test
mysql-test/t/sp.test:
  - Added test
sql/item_func.cc:
  Bug#20777 Function w BIGINT UNSIGNED shows diff. behaviour with and without --ps-protocol
  
  - Stored procedures returning unsinged values returns signed values if
    text protocol is used. The reason is that the stored proceedure item
    Item_func_sp wasn't initializing the member variables properly based
    on the information contained in the associated result field.
  - The patch is to upon field-item association, ::fix_fields, initialize
    the member variables in appropriate order.
  - Field type of an Item_func_sp was hard coded to MYSQL_TYPE_VARCHAR.
    This is changed to to return the type of the actual result field.
  - Member function name sp_result_field was refactored to the more 
    appropriate init_result_field.
  - Member function name find_and_check_access was refactored to 
    sp_check_access.
sql/item_func.h:
  Bug#20777 Function w BIGINT UNSIGNED shows diff. behaviour with and without --ps-protocol
  
  - Stored procedures returning unsinged values returns signed values if
    text protocol is used. The reason is that the stored proceedure item
    Item_func_sp wasn't initializing the member variables properly based
    on the information contained in the associated result field.
  - The patch is to upon field-item association, ::fix_fields, initialize
    the member variables in appropriate order.
  - Field type of an Item_func_sp was hard coded to MYSQL_TYPE_VARCHAR.
    This is changed to to return the type of the actual result field.
  - Member function name sp_result_field was refactored to the more 
    appropriate init_result_field.
  - Member function name find_and_check_access was refactored to 
    sp_check_access.
This commit is contained in:
unknown 2007-03-16 14:25:11 +01:00
parent c039eed82c
commit ffc605aad5
4 changed files with 319 additions and 185 deletions
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88
mysql-test/r/sp.result
View file

@ -5741,4 +5741,92 @@ END|
CALL bug24117()|
DROP PROCEDURE bug24117|
DROP TABLE t3|
drop function if exists bug20777|
drop table if exists examplebug20777|
create function bug20777(f1 bigint unsigned) returns bigint unsigned
begin
set f1 = (f1 - 10); set f1 = (f1 + 10);
return f1;
end|
select bug20777(9223372036854775803) as '9223372036854775803 2**63-5';
9223372036854775803 2**63-5
9223372036854775803
select bug20777(9223372036854775804) as '9223372036854775804 2**63-4';
9223372036854775804 2**63-4
9223372036854775804
select bug20777(9223372036854775805) as '9223372036854775805 2**63-3';
9223372036854775805 2**63-3
9223372036854775805
select bug20777(9223372036854775806) as '9223372036854775806 2**63-2';
9223372036854775806 2**63-2
9223372036854775806
select bug20777(9223372036854775807) as '9223372036854775807 2**63-1';
9223372036854775807 2**63-1
9223372036854775807
select bug20777(9223372036854775808) as '9223372036854775808 2**63+0';
9223372036854775808 2**63+0
9223372036854775808
select bug20777(9223372036854775809) as '9223372036854775809 2**63+1';
9223372036854775809 2**63+1
9223372036854775809
select bug20777(9223372036854775810) as '9223372036854775810 2**63+2';
9223372036854775810 2**63+2
9223372036854775810
select bug20777(-9223372036854775808) as 'lower bounds signed bigint';
lower bounds signed bigint
0
select bug20777(9223372036854775807) as 'upper bounds signed bigint';
upper bounds signed bigint
9223372036854775807
select bug20777(0) as 'lower bounds unsigned bigint';
lower bounds unsigned bigint
0
select bug20777(18446744073709551615) as 'upper bounds unsigned bigint';
upper bounds unsigned bigint
18446744073709551615
select bug20777(18446744073709551616) as 'upper bounds unsigned bigint + 1';
upper bounds unsigned bigint + 1
18446744073709551615
select bug20777(-1) as 'lower bounds unsigned bigint - 1';
lower bounds unsigned bigint - 1
0
select bug20777(1.84e+19) as 'submitter value, 1.84e19';
submitter value, 1.84e19
9223372036854775808
create table examplebug20777 as select
0 as 'i',
bug20777(9223372036854775806) as '2**63-2',
bug20777(9223372036854775807) as '2**63-1',
bug20777(9223372036854775808) as '2**63',
bug20777(9223372036854775809) as '2**63+1',
bug20777(18446744073709551614) as '2**64-2',
bug20777(18446744073709551615) as '2**64-1',
bug20777(18446744073709551616) as '2**64',
bug20777(0) as '0',
bug20777(-1) as '-1';
insert into examplebug20777 values (1, 9223372036854775806, 9223372036854775807, 223372036854775808, 9223372036854775809, 18446744073709551614, 18446744073709551615, 8446744073709551616, 0, -1);
show create table examplebug20777;
Table Create Table
examplebug20777 CREATE TABLE `examplebug20777` (
`i` int(1) NOT NULL default '0',
`2**63-2` bigint(20) unsigned default NULL,
`2**63-1` bigint(20) unsigned default NULL,
`2**63` bigint(20) unsigned default NULL,
`2**63+1` bigint(20) unsigned default NULL,
`2**64-2` bigint(20) unsigned default NULL,
`2**64-1` bigint(20) unsigned default NULL,
`2**64` bigint(20) unsigned default NULL,
`0` bigint(20) unsigned default NULL,
`-1` bigint(20) unsigned default NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
select * from examplebug20777 order by i;
i 2**63-2 2**63-1 2**63 2**63+1 2**64-2 2**64-1 2**64 0 -1
0 9223372036854775806 9223372036854775807 9223372036854775808 9223372036854775809 18446744073709551614 18446744073709551615 18446744073709551615 0 0
1 9223372036854775806 9223372036854775807 223372036854775808 9223372036854775809 18446744073709551614 18446744073709551615 8446744073709551616 0 0
drop table examplebug20777;
select bug20777(18446744073709551613)+1;
bug20777(18446744073709551613)+1
18446744073709551614
drop function bug20777;
End of 5.0 tests.
drop table t1,t2;

60
mysql-test/t/sp.test
View file

@ -6715,9 +6715,56 @@ DROP PROCEDURE bug24117|
DROP TABLE t3|
#
# NOTE: The delimiter is `|`, and not `;`. It is changed to `;`
# at the end of the file!
# Bug#20777: Function w BIGINT UNSIGNED shows diff. behaviour --ps-protocol
#
--disable_warnings
drop function if exists bug20777|
drop table if exists examplebug20777|
--enabled_warnings
create function bug20777(f1 bigint unsigned) returns bigint unsigned
begin
set f1 = (f1 - 10); set f1 = (f1 + 10);
return f1;
end|
delimiter ;|
select bug20777(9223372036854775803) as '9223372036854775803 2**63-5';
select bug20777(9223372036854775804) as '9223372036854775804 2**63-4';
select bug20777(9223372036854775805) as '9223372036854775805 2**63-3';
select bug20777(9223372036854775806) as '9223372036854775806 2**63-2';
select bug20777(9223372036854775807) as '9223372036854775807 2**63-1';
select bug20777(9223372036854775808) as '9223372036854775808 2**63+0';
select bug20777(9223372036854775809) as '9223372036854775809 2**63+1';
select bug20777(9223372036854775810) as '9223372036854775810 2**63+2';
select bug20777(-9223372036854775808) as 'lower bounds signed bigint';
select bug20777(9223372036854775807) as 'upper bounds signed bigint';
select bug20777(0) as 'lower bounds unsigned bigint';
select bug20777(18446744073709551615) as 'upper bounds unsigned bigint';
select bug20777(18446744073709551616) as 'upper bounds unsigned bigint + 1';
select bug20777(-1) as 'lower bounds unsigned bigint - 1';
select bug20777(1.84e+19) as 'submitter value, 1.84e19';
create table examplebug20777 as select
0 as 'i',
bug20777(9223372036854775806) as '2**63-2',
bug20777(9223372036854775807) as '2**63-1',
bug20777(9223372036854775808) as '2**63',
bug20777(9223372036854775809) as '2**63+1',
bug20777(18446744073709551614) as '2**64-2',
bug20777(18446744073709551615) as '2**64-1',
bug20777(18446744073709551616) as '2**64',
bug20777(0) as '0',
bug20777(-1) as '-1';
insert into examplebug20777 values (1, 9223372036854775806, 9223372036854775807, 223372036854775808, 9223372036854775809, 18446744073709551614, 18446744073709551615, 8446744073709551616, 0, -1);
show create table examplebug20777;
select * from examplebug20777 order by i;
drop table examplebug20777;
select bug20777(18446744073709551613)+1;
drop function bug20777;
delimiter |;
###
--echo End of 5.0 tests.
#
# BUG#NNNN: New bug synopsis
@ -6726,8 +6773,13 @@ DROP TABLE t3|
#drop procedure if exists bugNNNN|
#--enable_warnings
#create procedure bugNNNN...
#
# Add bugs above this line. Use existing tables t1 and t2 when
# practical, or create table t3, t4 etc temporarily (and drop them).
# practical, or create table t3,t4 etc temporarily (and drop them).
# NOTE: The delimiter is `|`, and not `;`. It is changed to `;`
# at the end of the file!
#
delimiter ;|
drop table t1,t2;

325
sql/item_func.cc
View file

@ -4979,8 +4979,7 @@ longlong Item_func_row_count::val_int()
Item_func_sp::Item_func_sp(Name_resolution_context *context_arg, sp_name *name)
:Item_func(), context(context_arg), m_name(name), m_sp(NULL),
result_field(NULL)
:Item_func(), context(context_arg), m_name(name), m_sp(NULL), sp_result_field(NULL)
{
maybe_null= 1;
m_name->init_qname(current_thd);
@ -4990,21 +4989,21 @@ Item_func_sp::Item_func_sp(Name_resolution_context *context_arg, sp_name *name)
Item_func_sp::Item_func_sp(Name_resolution_context *context_arg,
sp_name *name, List<Item> &list)
:Item_func(list), context(context_arg), m_name(name), m_sp(NULL),
result_field(NULL)
:Item_func(list), context(context_arg), m_name(name), m_sp(NULL),sp_result_field(NULL)
{
maybe_null= 1;
m_name->init_qname(current_thd);
dummy_table= (TABLE*) sql_calloc(sizeof(TABLE));
}
void
Item_func_sp::cleanup()
{
if (result_field)
if (sp_result_field)
{
delete result_field;
result_field= NULL;
delete sp_result_field;
sp_result_field= NULL;
}
m_sp= NULL;
dummy_table->s= NULL;
@ -5033,82 +5032,117 @@ Item_func_sp::func_name() const
}
Field *
Item_func_sp::sp_result_field(void) const
/**
@brief Initialize the result field by creating a temporary dummy table
and assign it to a newly created field object. Meta data used to
create the field is fetched from the sp_head belonging to the stored
proceedure found in the stored procedure functon cache.
@note This function should be called from fix_fields to init the result
field. It is some what related to Item_field.
@see Item_field
@param thd A pointer to the session and thread context.
@return Function return error status.
@retval TRUE is returned on an error
@retval FALSE is returned on success.
*/
bool
Item_func_sp::init_result_field(THD *thd)
{
Field *field;
DBUG_ENTER("Item_func_sp::sp_result_field");
DBUG_PRINT("info", ("sp: %s, flags: %x, level: %lu",
(m_sp ? "YES" : "NO"),
(m_sp ? m_sp->m_flags : (uint)0),
(m_sp ? m_sp->m_recursion_level : (ulong)0)));
DBUG_ENTER("Item_func_sp::init_result_field");
char *empty_name= (char *) "";
TABLE_SHARE *share;
if (!m_sp)
{
THD *thd= current_thd;
if (!(m_sp= sp_find_routine(thd, TYPE_ENUM_FUNCTION, m_name,
&thd->sp_func_cache, TRUE)))
{
my_error(ER_SP_DOES_NOT_EXIST, MYF(0), "FUNCTION", m_name->m_qname.str);
DBUG_RETURN(0);
}
}
if (!dummy_table->s)
{
char *empty_name= (char *) "";
TABLE_SHARE *share;
dummy_table->s= share= &dummy_table->share_not_to_be_used;
dummy_table->alias = empty_name;
dummy_table->maybe_null = maybe_null;
dummy_table->in_use= current_thd;
dummy_table->copy_blobs= TRUE;
share->table_cache_key = empty_name;
share->table_name = empty_name;
}
if (!(field= m_sp->create_result_field(max_length, name, dummy_table)))
my_message(ER_OUT_OF_RESOURCES, ER(ER_OUT_OF_RESOURCES), MYF(0));
DBUG_ASSERT(m_sp == NULL);
DBUG_ASSERT(sp_result_field == NULL);
DBUG_ASSERT(dummy_table->s == NULL);
DBUG_RETURN(field);
if (!(m_sp= sp_find_routine(thd, TYPE_ENUM_FUNCTION, m_name,
&thd->sp_func_cache, TRUE)))
{
my_error(ER_SP_DOES_NOT_EXIST, MYF(0), "FUNCTION", m_name->m_qname.str);
context->process_error(thd);
DBUG_RETURN(TRUE);
}
/*
A Field need to be attached to a Table.
Below we "create" a dummy table by initializing
the needed pointers.
*/
dummy_table->s= share= &dummy_table->share_not_to_be_used;
dummy_table->alias = empty_name;
dummy_table->maybe_null = maybe_null;
dummy_table->in_use= thd;
dummy_table->copy_blobs= TRUE;
share->table_cache_key = empty_name;
share->table_name = empty_name;
if (!(sp_result_field= m_sp->create_result_field(max_length, name, dummy_table)))
{
DBUG_RETURN(TRUE);
}
if (sp_result_field->pack_length() > sizeof(result_buf))
{
sp_result_field->move_field(sql_alloc(sp_result_field->pack_length()));
} else {
sp_result_field->move_field(result_buf);
}
sp_result_field->null_ptr= (uchar *) &null_value;
sp_result_field->null_bit= 1;
DBUG_RETURN(FALSE);
}
/**
@brief Initialize local members with values from the Field interface.
/*
Execute function & store value in field
@note called from Item::fix_fields.
*/
void Item_func_sp::fix_length_and_dec()
{
DBUG_ENTER("Item_func_sp::fix_length_and_dec");
RETURN
0 value <> NULL
1 value = NULL or error
DBUG_ASSERT(sp_result_field);
decimals= sp_result_field->decimals();
max_length= sp_result_field->field_length;
collation.set(sp_result_field->charset());
maybe_null= 1;
unsigned_flag= test(sp_result_field->flags & UNSIGNED_FLAG);
DBUG_VOID_RETURN;
}
/**
@brief Execute function & store value in field.
@return Function returns error status.
@retval FALSE on success.
@retval TRUE if an error occurred.
*/
bool
Item_func_sp::execute(Field **flp)
Item_func_sp::execute()
{
THD *thd= current_thd;
Field *f;
/*
Get field in virtual tmp table to store result. Create the field if
invoked first time.
*/
if (!(f= *flp))
{
if (!(*flp= f= sp_result_field()))
{
/* Error set by sp_result_field() */
null_value= 1;
return TRUE;
}
f->move_field((f->pack_length() > sizeof(result_buf)) ?
sql_alloc(f->pack_length()) : result_buf);
f->null_ptr= (uchar *)&null_value;
f->null_bit= 1;
}
/* Execute function and store the return value in the field. */
if (execute_impl(thd, f))
if (execute_impl(thd))
{
null_value= 1;
context->process_error(thd);
@ -5117,14 +5151,24 @@ Item_func_sp::execute(Field **flp)
/* Check that the field (the value) is not NULL. */
null_value= f->is_null();
null_value= sp_result_field->is_null();
return null_value;
}
/**
@brief Execute function and store the return value in the field.
@note This function was intended to be the concrete implementation of
the interface function execute. This was never realized.
@return The error state.
@retval FALSE on success
@retval TRUE if an error occurred.
*/
bool
Item_func_sp::execute_impl(THD *thd, Field *return_value_fld)
Item_func_sp::execute_impl(THD *thd)
{
bool err_status= TRUE;
Sub_statement_state statement_state;
@ -5141,7 +5185,7 @@ Item_func_sp::execute_impl(THD *thd, Field *return_value_fld)
thd->security_ctx= context->security_ctx;
}
#endif
if (find_and_check_access(thd))
if (sp_check_access(thd))
goto error;
/*
@ -5150,7 +5194,7 @@ Item_func_sp::execute_impl(THD *thd, Field *return_value_fld)
function call into binlog.
*/
thd->reset_sub_statement_state(&statement_state, SUB_STMT_FUNCTION);
err_status= m_sp->execute_function(thd, args, arg_count, return_value_fld);
err_status= m_sp->execute_function(thd, args, arg_count, sp_result_field);
thd->restore_sub_statement_state(&statement_state);
error:
@ -5165,15 +5209,9 @@ error:
void
Item_func_sp::make_field(Send_field *tmp_field)
{
Field *field;
DBUG_ENTER("Item_func_sp::make_field");
if ((field= sp_result_field()))
{
field->make_field(tmp_field);
delete field;
DBUG_VOID_RETURN;
}
init_make_field(tmp_field, MYSQL_TYPE_VARCHAR);
DBUG_ASSERT(sp_result_field);
sp_result_field->make_field(tmp_field);
DBUG_VOID_RETURN;
}
@ -5181,67 +5219,20 @@ Item_func_sp::make_field(Send_field *tmp_field)
enum enum_field_types
Item_func_sp::field_type() const
{
Field *field;
DBUG_ENTER("Item_func_sp::field_type");
if (result_field)
DBUG_RETURN(result_field->type());
if ((field= sp_result_field()))
{
enum_field_types result= field->type();
delete field;
DBUG_RETURN(result);
}
DBUG_RETURN(MYSQL_TYPE_VARCHAR);
DBUG_ASSERT(sp_result_field);
DBUG_RETURN(sp_result_field->type());
}
Item_result
Item_func_sp::result_type() const
{
Field *field;
DBUG_ENTER("Item_func_sp::result_type");
DBUG_PRINT("info", ("m_sp = %p", m_sp));
if (result_field)
DBUG_RETURN(result_field->result_type());
if ((field= sp_result_field()))
{
Item_result result= field->result_type();
delete field;
DBUG_RETURN(result);
}
DBUG_RETURN(STRING_RESULT);
DBUG_ASSERT(sp_result_field);
DBUG_RETURN(sp_result_field->result_type());
}
void
Item_func_sp::fix_length_and_dec()
{
Field *field;
DBUG_ENTER("Item_func_sp::fix_length_and_dec");
if (result_field)
{
decimals= result_field->decimals();
max_length= result_field->field_length;
collation.set(result_field->charset());
DBUG_VOID_RETURN;
}
if (!(field= sp_result_field()))
{
context->process_error(current_thd);
DBUG_VOID_RETURN;
}
decimals= field->decimals();
max_length= field->field_length;
collation.set(field->charset());
maybe_null= 1;
delete field;
DBUG_VOID_RETURN;
}
longlong Item_func_found_rows::val_int()
{
DBUG_ASSERT(fixed == 1);
@ -5252,57 +5243,39 @@ longlong Item_func_found_rows::val_int()
Field *
Item_func_sp::tmp_table_field(TABLE *t_arg)
{
Field *field= 0;
DBUG_ENTER("Item_func_sp::tmp_table_field");
if (m_sp)
field= m_sp->create_result_field(max_length, (const char*) name, t_arg);
if (!field)
field= Item_func::tmp_table_field(t_arg);
if (!field)
my_message(ER_OUT_OF_RESOURCES, ER(ER_OUT_OF_RESOURCES), MYF(0));
DBUG_RETURN(field);
DBUG_ASSERT(sp_result_field);
DBUG_RETURN(sp_result_field);
}
/*
Find the function and check access rights to the function
SYNOPSIS
find_and_check_access()
thd thread handler
RETURN
FALSE Access granted
TRUE Requested access can't be granted or function doesn't exists
NOTES
Checks if requested access to function can be granted to user.
/**
@brief Checks if requested access to function can be granted to user.
If function isn't found yet, it searches function first.
If function can't be found or user don't have requested access
error is raised.
@param thd thread handler
@return Indication if the access was granted or not.
@retval FALSE Access is granted.
@retval TRUE Requested access can't be granted or function doesn't exists.
*/
bool
Item_func_sp::find_and_check_access(THD *thd)
Item_func_sp::sp_check_access(THD *thd)
{
if (! m_sp && ! (m_sp= sp_find_routine(thd, TYPE_ENUM_FUNCTION, m_name,
&thd->sp_func_cache, TRUE)))
{
my_error(ER_SP_DOES_NOT_EXIST, MYF(0), "FUNCTION", m_name->m_qname.str);
return TRUE;
}
DBUG_ENTER("Item_func_sp::sp_check_access");
DBUG_ASSERT(m_sp);
#ifndef NO_EMBEDDED_ACCESS_CHECKS
if (check_routine_access(thd, EXECUTE_ACL,
m_sp->m_db.str, m_sp->m_name.str, 0, FALSE))
return TRUE;
DBUG_RETURN(TRUE);
#endif
return FALSE;
DBUG_RETURN(FALSE);
}
@ -5310,9 +5283,25 @@ bool
Item_func_sp::fix_fields(THD *thd, Item **ref)
{
bool res;
DBUG_ENTER("Item_func_sp::fix_fields");
DBUG_ASSERT(fixed == 0);
/*
We must call init_result_field before Item_func::fix_fields()
to make m_sp and result_field members available to fix_length_and_dec(),
which is called from Item_func::fix_fields().
*/
res= init_result_field(thd);
if (res)
DBUG_RETURN(res);
res= Item_func::fix_fields(thd, ref);
if (!res && thd->lex->view_prepare_mode)
if (res)
DBUG_RETURN(res);
if (thd->lex->view_prepare_mode)
{
/*
Here we check privileges of the stored routine only during view
@ -5324,15 +5313,17 @@ Item_func_sp::fix_fields(THD *thd, Item **ref)
good idea especially if the view has SQL SECURITY DEFINER and
the used stored procedure has SQL SECURITY DEFINER.
*/
res= find_and_check_access(thd);
res= sp_check_access(thd);
#ifndef NO_EMBEDDED_ACCESS_CHECKS
/*
Try to set and restore the security context to see whether it's valid
*/
Security_context *save_secutiry_ctx;
if (!res && !(res= set_routine_security_ctx(thd, m_sp, false,
&save_secutiry_ctx)))
{
res= set_routine_security_ctx(thd, m_sp, false, &save_secutiry_ctx);
if (!res)
sp_restore_security_context(thd, save_secutiry_ctx);
}
#endif /* ! NO_EMBEDDED_ACCESS_CHECKS */
}
return res;
DBUG_RETURN(res);
}

31
sql/item_func.h
View file

@ -1405,12 +1405,15 @@ private:
sp_name *m_name;
mutable sp_head *m_sp;
TABLE *dummy_table;
Field *result_field;
char result_buf[64];
/*
The result field of the concrete stored function.
*/
Field *sp_result_field;
bool execute(Field **flp);
bool execute_impl(THD *thd, Field *return_value_fld);
Field *sp_result_field(void) const;
bool execute();
bool execute_impl(THD *thd);
bool init_result_field(THD *thd);
public:
@ -1436,23 +1439,23 @@ public:
longlong val_int()
{
if (execute(&result_field))
if (execute())
return (longlong) 0;
return result_field->val_int();
return sp_result_field->val_int();
}
double val_real()
{
if (execute(&result_field))
if (execute())
return 0.0;
return result_field->val_real();
return sp_result_field->val_real();
}
my_decimal *val_decimal(my_decimal *dec_buf)
{
if (execute(&result_field))
if (execute())
return NULL;
return result_field->val_decimal(dec_buf);
return sp_result_field->val_decimal(dec_buf);
}
String *val_str(String *str)
@ -1461,7 +1464,7 @@ public:
char buff[20];
buf.set(buff, 20, str->charset());
buf.length(0);
if (execute(&result_field))
if (execute())
return NULL;
/*
result_field will set buf pointing to internal buffer
@ -1469,7 +1472,7 @@ public:
when SP is executed. In order to prevent occasional
corruption of returned value, we make here a copy.
*/
result_field->val_str(&buf);
sp_result_field->val_str(&buf);
str->copy(buf);
return str;
}
@ -1477,11 +1480,11 @@ public:
virtual bool change_context_processor(byte *cntx)
{ context= (Name_resolution_context *)cntx; return FALSE; }
void fix_length_and_dec();
bool find_and_check_access(THD * thd);
bool sp_check_access(THD * thd);
virtual enum Functype functype() const { return FUNC_SP; }
bool fix_fields(THD *thd, Item **ref);
void fix_length_and_dec(void);
bool is_expensive() { return 1; }
};