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mariadb/sql/partition_info.cc
monty@mysql.com/narttu.mysql.fi 088e2395f1 WL#3817: Simplify string / memory area types and make things more consistent (first part) 
The following type conversions was done:

- Changed byte to uchar
- Changed gptr to uchar*
- Change my_string to char *
- Change my_size_t to size_t
- Change size_s to size_t

Removed declaration of byte, gptr, my_string, my_size_t and size_s. 

Following function parameter changes was done:
- All string functions in mysys/strings was changed to use size_t
  instead of uint for string lengths.
- All read()/write() functions changed to use size_t (including vio).
- All protocoll functions changed to use size_t instead of uint
- Functions that used a pointer to a string length was changed to use size_t*
- Changed malloc(), free() and related functions from using gptr to use void *
  as this requires fewer casts in the code and is more in line with how the
  standard functions work.
- Added extra length argument to dirname_part() to return the length of the
  created string.
- Changed (at least) following functions to take uchar* as argument:
  - db_dump()
  - my_net_write()
  - net_write_command()
  - net_store_data()
  - DBUG_DUMP()
  - decimal2bin() & bin2decimal()
- Changed my_compress() and my_uncompress() to use size_t. Changed one
  argument to my_uncompress() from a pointer to a value as we only return
  one value (makes function easier to use).
- Changed type of 'pack_data' argument to packfrm() to avoid casts.
- Changed in readfrm() and writefrom(), ha_discover and handler::discover()
  the type for argument 'frmdata' to uchar** to avoid casts.
- Changed most Field functions to use uchar* instead of char* (reduced a lot of
  casts).
- Changed field->val_xxx(xxx, new_ptr) to take const pointers.

Other changes:
- Removed a lot of not needed casts
- Added a few new cast required by other changes
- Added some cast to my_multi_malloc() arguments for safety (as string lengths
  needs to be uint, not size_t).
- Fixed all calls to hash-get-key functions to use size_t*. (Needed to be done
  explicitely as this conflict was often hided by casting the function to
  hash_get_key).
- Changed some buffers to memory regions to uchar* to avoid casts.
- Changed some string lengths from uint to size_t.
- Changed field->ptr to be uchar* instead of char*. This allowed us to
  get rid of a lot of casts.
- Some changes from true -> TRUE, false -> FALSE, unsigned char -> uchar
- Include zlib.h in some files as we needed declaration of crc32()
- Changed MY_FILE_ERROR to be (size_t) -1.
- Changed many variables to hold the result of my_read() / my_write() to be
  size_t. This was needed to properly detect errors (which are
  returned as (size_t) -1).
- Removed some very old VMS code
- Changed packfrm()/unpackfrm() to not be depending on uint size
  (portability fix)
- Removed windows specific code to restore cursor position as this
  causes slowdown on windows and we should not mix read() and pread()
  calls anyway as this is not thread safe. Updated function comment to
  reflect this. Changed function that depended on original behavior of
  my_pwrite() to itself restore the cursor position (one such case).
- Added some missing checking of return value of malloc().
- Changed definition of MOD_PAD_CHAR_TO_FULL_LENGTH to avoid 'long' overflow.
- Changed type of table_def::m_size from my_size_t to ulong to reflect that
  m_size is the number of elements in the array, not a string/memory
  length.
- Moved THD::max_row_length() to table.cc (as it's not depending on THD).
  Inlined max_row_length_blob() into this function.
- More function comments
- Fixed some compiler warnings when compiled without partitions.
- Removed setting of LEX_STRING() arguments in declaration (portability fix).
- Some trivial indentation/variable name changes.
- Some trivial code simplifications:
  - Replaced some calls to alloc_root + memcpy to use
    strmake_root()/strdup_root().
  - Changed some calls from memdup() to strmake() (Safety fix)
  - Simpler loops in client-simple.c
2007-05-10 12:59:39 +03:00

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/* Copyright (C) 2006 MySQL AB
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
/* Some general useful functions */
#ifdef USE_PRAGMA_IMPLEMENTATION
#pragma implementation
#endif
#include "mysql_priv.h"
#ifdef WITH_PARTITION_STORAGE_ENGINE
#include "ha_partition.h"
partition_info *partition_info::get_clone()
{
if (!this)
return 0;
List_iterator<partition_element> part_it(partitions);
partition_element *part;
partition_info *clone= new partition_info();
if (!clone)
{
mem_alloc_error(sizeof(partition_info));
return NULL;
}
memcpy(clone, this, sizeof(partition_info));
clone->partitions.empty();
while ((part= (part_it++)))
{
List_iterator<partition_element> subpart_it(part->subpartitions);
partition_element *subpart;
partition_element *part_clone= new partition_element();
if (!part_clone)
{
mem_alloc_error(sizeof(partition_element));
return NULL;
}
memcpy(part_clone, part, sizeof(partition_element));
part_clone->subpartitions.empty();
while ((subpart= (subpart_it++)))
{
partition_element *subpart_clone= new partition_element();
if (!subpart_clone)
{
mem_alloc_error(sizeof(partition_element));
return NULL;
}
memcpy(subpart_clone, subpart, sizeof(partition_element));
part_clone->subpartitions.push_back(subpart_clone);
}
clone->partitions.push_back(part_clone);
}
return clone;
}
/*
Create a memory area where default partition names are stored and fill it
up with the names.
SYNOPSIS
create_default_partition_names()
part_no Partition number for subparts
no_parts Number of partitions
start_no Starting partition number
subpart Is it subpartitions
RETURN VALUE
A pointer to the memory area of the default partition names
DESCRIPTION
A support routine for the partition code where default values are
generated.
The external routine needing this code is check_partition_info
*/
#define MAX_PART_NAME_SIZE 8
char *partition_info::create_default_partition_names(uint part_no,
uint no_parts,
uint start_no)
{
char *ptr= (char*) sql_calloc(no_parts*MAX_PART_NAME_SIZE);
char *move_ptr= ptr;
uint i= 0;
DBUG_ENTER("create_default_partition_names");
if (likely(ptr != 0))
{
do
{
my_sprintf(move_ptr, (move_ptr,"p%u", (start_no + i)));
move_ptr+=MAX_PART_NAME_SIZE;
} while (++i < no_parts);
}
else
{
mem_alloc_error(no_parts*MAX_PART_NAME_SIZE);
}
DBUG_RETURN(ptr);
}
/*
Create a unique name for the subpartition as part_name'sp''subpart_no'
SYNOPSIS
create_subpartition_name()
subpart_no Number of subpartition
part_name Name of partition
RETURN VALUES
>0 A reference to the created name string
0 Memory allocation error
*/
char *partition_info::create_subpartition_name(uint subpart_no,
const char *part_name)
{
uint size_alloc= strlen(part_name) + MAX_PART_NAME_SIZE;
char *ptr= (char*) sql_calloc(size_alloc);
DBUG_ENTER("create_subpartition_name");
if (likely(ptr != NULL))
{
my_sprintf(ptr, (ptr, "%ssp%u", part_name, subpart_no));
}
else
{
mem_alloc_error(size_alloc);
}
DBUG_RETURN(ptr);
}
/*
Set up all the default partitions not set-up by the user in the SQL
statement. Also perform a number of checks that the user hasn't tried
to use default values where no defaults exists.
SYNOPSIS
set_up_default_partitions()
file A reference to a handler of the table
info Create info
start_no Starting partition number
RETURN VALUE
TRUE Error, attempted default values not possible
FALSE Ok, default partitions set-up
DESCRIPTION
The routine uses the underlying handler of the partitioning to define
the default number of partitions. For some handlers this requires
knowledge of the maximum number of rows to be stored in the table.
This routine only accepts HASH and KEY partitioning and thus there is
no subpartitioning if this routine is successful.
The external routine needing this code is check_partition_info
*/
bool partition_info::set_up_default_partitions(handler *file,
HA_CREATE_INFO *info,
uint start_no)
{
uint i;
char *default_name;
bool result= TRUE;
DBUG_ENTER("partition_info::set_up_default_partitions");
if (part_type != HASH_PARTITION)
{
const char *error_string;
if (part_type == RANGE_PARTITION)
error_string= partition_keywords[PKW_RANGE].str;
else
error_string= partition_keywords[PKW_LIST].str;
my_error(ER_PARTITIONS_MUST_BE_DEFINED_ERROR, MYF(0), error_string);
goto end;
}
if ((no_parts == 0) &&
((no_parts= file->get_default_no_partitions(info)) == 0))
{
my_error(ER_PARTITION_NOT_DEFINED_ERROR, MYF(0), "partitions");
goto end;
}
if (unlikely(no_parts > MAX_PARTITIONS))
{
my_error(ER_TOO_MANY_PARTITIONS_ERROR, MYF(0));
goto end;
}
if (unlikely((!(default_name= create_default_partition_names(0, no_parts,
start_no)))))
goto end;
i= 0;
do
{
partition_element *part_elem= new partition_element();
if (likely(part_elem != 0 &&
(!partitions.push_back(part_elem))))
{
part_elem->engine_type= default_engine_type;
part_elem->partition_name= default_name;
default_name+=MAX_PART_NAME_SIZE;
}
else
{
mem_alloc_error(sizeof(partition_element));
goto end;
}
} while (++i < no_parts);
result= FALSE;
end:
DBUG_RETURN(result);
}
/*
Set up all the default subpartitions not set-up by the user in the SQL
statement. Also perform a number of checks that the default partitioning
becomes an allowed partitioning scheme.
SYNOPSIS
set_up_default_subpartitions()
file A reference to a handler of the table
info Create info
RETURN VALUE
TRUE Error, attempted default values not possible
FALSE Ok, default partitions set-up
DESCRIPTION
The routine uses the underlying handler of the partitioning to define
the default number of partitions. For some handlers this requires
knowledge of the maximum number of rows to be stored in the table.
This routine is only called for RANGE or LIST partitioning and those
need to be specified so only subpartitions are specified.
The external routine needing this code is check_partition_info
*/
bool partition_info::set_up_default_subpartitions(handler *file,
HA_CREATE_INFO *info)
{
uint i, j;
bool result= TRUE;
partition_element *part_elem;
List_iterator<partition_element> part_it(partitions);
DBUG_ENTER("partition_info::set_up_default_subpartitions");
if (no_subparts == 0)
no_subparts= file->get_default_no_partitions(info);
if (unlikely((no_parts * no_subparts) > MAX_PARTITIONS))
{
my_error(ER_TOO_MANY_PARTITIONS_ERROR, MYF(0));
goto end;
}
i= 0;
do
{
part_elem= part_it++;
j= 0;
do
{
partition_element *subpart_elem= new partition_element(part_elem);
if (likely(subpart_elem != 0 &&
(!part_elem->subpartitions.push_back(subpart_elem))))
{
char *ptr= create_subpartition_name(j, part_elem->partition_name);
if (!ptr)
goto end;
subpart_elem->engine_type= default_engine_type;
subpart_elem->partition_name= ptr;
}
else
{
mem_alloc_error(sizeof(partition_element));
goto end;
}
} while (++j < no_subparts);
} while (++i < no_parts);
result= FALSE;
end:
DBUG_RETURN(result);
}
/*
Support routine for check_partition_info
SYNOPSIS
set_up_defaults_for_partitioning()
file A reference to a handler of the table
info Create info
start_no Starting partition number
RETURN VALUE
TRUE Error, attempted default values not possible
FALSE Ok, default partitions set-up
DESCRIPTION
Set up defaults for partition or subpartition (cannot set-up for both,
this will return an error.
*/
bool partition_info::set_up_defaults_for_partitioning(handler *file,
HA_CREATE_INFO *info,
uint start_no)
{
DBUG_ENTER("partition_info::set_up_defaults_for_partitioning");
if (!default_partitions_setup)
{
default_partitions_setup= TRUE;
if (use_default_partitions)
DBUG_RETURN(set_up_default_partitions(file, info, start_no));
if (is_sub_partitioned() &&
use_default_subpartitions)
DBUG_RETURN(set_up_default_subpartitions(file, info));
}
DBUG_RETURN(FALSE);
}
/*
A support function to check if a partition element's name is unique
SYNOPSIS
has_unique_name()
partition_element element to check
RETURN VALUES
TRUE Has unique name
FALSE Doesn't
*/
bool partition_info::has_unique_name(partition_element *element)
{
DBUG_ENTER("partition_info::has_unique_name");
const char *name_to_check= element->partition_name;
List_iterator<partition_element> parts_it(partitions);
partition_element *el;
while ((el= (parts_it++)))
{
if (!(my_strcasecmp(system_charset_info, el->partition_name,
name_to_check)) && el != element)
DBUG_RETURN(FALSE);
if (!el->subpartitions.is_empty())
{
partition_element *sub_el;
List_iterator<partition_element> subparts_it(el->subpartitions);
while ((sub_el= (subparts_it++)))
{
if (!(my_strcasecmp(system_charset_info, sub_el->partition_name,
name_to_check)) && sub_el != element)
DBUG_RETURN(FALSE);
}
}
}
DBUG_RETURN(TRUE);
}
/*
A support function to check partition names for duplication in a
partitioned table
SYNOPSIS
has_unique_names()
RETURN VALUES
TRUE Has unique part and subpart names
FALSE Doesn't
DESCRIPTION
Checks that the list of names in the partitions doesn't contain any
duplicated names.
*/
char *partition_info::has_unique_names()
{
DBUG_ENTER("partition_info::has_unique_names");
List_iterator<partition_element> parts_it(partitions);
partition_element *el;
while ((el= (parts_it++)))
{
if (! has_unique_name(el))
DBUG_RETURN(el->partition_name);
if (!el->subpartitions.is_empty())
{
List_iterator<partition_element> subparts_it(el->subpartitions);
partition_element *subel;
while ((subel= (subparts_it++)))
{
if (! has_unique_name(subel))
DBUG_RETURN(subel->partition_name);
}
}
}
DBUG_RETURN(NULL);
}
/*
Check that all partitions use the same storage engine.
This is currently a limitation in this version.
SYNOPSIS
check_engine_mix()
engine_array An array of engine identifiers
no_parts Total number of partitions
RETURN VALUE
TRUE Error, mixed engines
FALSE Ok, no mixed engines
DESCRIPTION
Current check verifies only that all handlers are the same.
Later this check will be more sophisticated.
*/
bool partition_info::check_engine_mix(handlerton **engine_array, uint no_parts)
{
uint i= 0;
DBUG_ENTER("partition_info::check_engine_mix");
do
{
if (engine_array[i] != engine_array[0])
{
my_error(ER_MIX_HANDLER_ERROR, MYF(0));
DBUG_RETURN(TRUE);
}
} while (++i < no_parts);
if (engine_array[0]->flags & HTON_NO_PARTITION)
{
my_error(ER_PARTITION_MERGE_ERROR, MYF(0));
DBUG_RETURN(TRUE);
}
DBUG_RETURN(FALSE);
}
/*
This routine allocates an array for all range constants to achieve a fast
check what partition a certain value belongs to. At the same time it does
also check that the range constants are defined in increasing order and
that the expressions are constant integer expressions.
SYNOPSIS
check_range_constants()
RETURN VALUE
TRUE An error occurred during creation of range constants
FALSE Successful creation of range constant mapping
DESCRIPTION
This routine is called from check_partition_info to get a quick error
before we came too far into the CREATE TABLE process. It is also called
from fix_partition_func every time we open the .frm file. It is only
called for RANGE PARTITIONed tables.
*/
bool partition_info::check_range_constants()
{
partition_element* part_def;
longlong current_largest;
longlong part_range_value;
bool first= TRUE;
uint i;
List_iterator<partition_element> it(partitions);
bool result= TRUE;
bool signed_flag= !part_expr->unsigned_flag;
DBUG_ENTER("partition_info::check_range_constants");
DBUG_PRINT("enter", ("INT_RESULT with %d parts", no_parts));
LINT_INIT(current_largest);
part_result_type= INT_RESULT;
range_int_array= (longlong*)sql_alloc(no_parts * sizeof(longlong));
if (unlikely(range_int_array == NULL))
{
mem_alloc_error(no_parts * sizeof(longlong));
goto end;
}
i= 0;
do
{
part_def= it++;
if ((i != (no_parts - 1)) || !defined_max_value)
{
part_range_value= part_def->range_value;
if (!signed_flag)
part_range_value-= 0x8000000000000000ULL;
}
else
part_range_value= LONGLONG_MAX;
if (first)
{
current_largest= part_range_value;
range_int_array[0]= part_range_value;
first= FALSE;
}
else
{
if (likely(current_largest < part_range_value))
{
current_largest= part_range_value;
range_int_array[i]= part_range_value;
}
else
{
my_error(ER_RANGE_NOT_INCREASING_ERROR, MYF(0));
goto end;
}
}
} while (++i < no_parts);
result= FALSE;
end:
DBUG_RETURN(result);
}
/*
Support routines for check_list_constants used by qsort to sort the
constant list expressions. One routine for unsigned and one for signed.
SYNOPSIS
list_part_cmp()
a First list constant to compare with
b Second list constant to compare with
RETURN VALUE
+1 a > b
0 a == b
-1 a < b
*/
int partition_info::list_part_cmp(const void* a, const void* b)
{
longlong a1= ((LIST_PART_ENTRY*)a)->list_value;
longlong b1= ((LIST_PART_ENTRY*)b)->list_value;
if (a1 < b1)
return -1;
else if (a1 > b1)
return +1;
else
return 0;
}
/*
This routine allocates an array for all list constants to achieve a fast
check what partition a certain value belongs to. At the same time it does
also check that there are no duplicates among the list constants and that
that the list expressions are constant integer expressions.
SYNOPSIS
check_list_constants()
RETURN VALUE
TRUE An error occurred during creation of list constants
FALSE Successful creation of list constant mapping
DESCRIPTION
This routine is called from check_partition_info to get a quick error
before we came too far into the CREATE TABLE process. It is also called
from fix_partition_func every time we open the .frm file. It is only
called for LIST PARTITIONed tables.
*/
bool partition_info::check_list_constants()
{
uint i;
uint list_index= 0;
part_elem_value *list_value;
bool result= TRUE;
longlong curr_value, prev_value, type_add, calc_value;
partition_element* part_def;
bool found_null= FALSE;
List_iterator<partition_element> list_func_it(partitions);
DBUG_ENTER("partition_info::check_list_constants");
part_result_type= INT_RESULT;
no_list_values= 0;
/*
We begin by calculating the number of list values that have been
defined in the first step.
We use this number to allocate a properly sized array of structs
to keep the partition id and the value to use in that partition.
In the second traversal we assign them values in the struct array.
Finally we sort the array of structs in order of values to enable
a quick binary search for the proper value to discover the
partition id.
After sorting the array we check that there are no duplicates in the
list.
*/
i= 0;
do
{
part_def= list_func_it++;
if (part_def->has_null_value)
{
if (found_null)
{
my_error(ER_MULTIPLE_DEF_CONST_IN_LIST_PART_ERROR, MYF(0));
goto end;
}
has_null_value= TRUE;
has_null_part_id= i;
found_null= TRUE;
}
List_iterator<part_elem_value> list_val_it1(part_def->list_val_list);
while (list_val_it1++)
no_list_values++;
} while (++i < no_parts);
list_func_it.rewind();
list_array= (LIST_PART_ENTRY*)sql_alloc((no_list_values+1) *
sizeof(LIST_PART_ENTRY));
if (unlikely(list_array == NULL))
{
mem_alloc_error(no_list_values * sizeof(LIST_PART_ENTRY));
goto end;
}
i= 0;
/*
Fix to be able to reuse signed sort functions also for unsigned
partition functions.
*/
type_add= (longlong)(part_expr->unsigned_flag ?
0x8000000000000000ULL :
0ULL);
do
{
part_def= list_func_it++;
List_iterator<part_elem_value> list_val_it2(part_def->list_val_list);
while ((list_value= list_val_it2++))
{
calc_value= list_value->value - type_add;
list_array[list_index].list_value= calc_value;
list_array[list_index++].partition_id= i;
}
} while (++i < no_parts);
if (fixed && no_list_values)
{
bool first= TRUE;
qsort((void*)list_array, no_list_values, sizeof(LIST_PART_ENTRY),
&list_part_cmp);
i= 0;
LINT_INIT(prev_value);
do
{
DBUG_ASSERT(i < no_list_values);
curr_value= list_array[i].list_value;
if (likely(first || prev_value != curr_value))
{
prev_value= curr_value;
first= FALSE;
}
else
{
my_error(ER_MULTIPLE_DEF_CONST_IN_LIST_PART_ERROR, MYF(0));
goto end;
}
} while (++i < no_list_values);
}
result= FALSE;
end:
DBUG_RETURN(result);
}
/*
This code is used early in the CREATE TABLE and ALTER TABLE process.
SYNOPSIS
check_partition_info()
file A reference to a handler of the table
info Create info
engine_type Return value for used engine in partitions
check_partition_function Should we check the partition function
RETURN VALUE
TRUE Error, something went wrong
FALSE Ok, full partition data structures are now generated
DESCRIPTION
We will check that the partition info requested is possible to set-up in
this version. This routine is an extension of the parser one could say.
If defaults were used we will generate default data structures for all
partitions.
*/
bool partition_info::check_partition_info(THD *thd, handlerton **eng_type,
handler *file, HA_CREATE_INFO *info,
bool check_partition_function)
{
handlerton **engine_array= NULL;
uint part_count= 0;
uint i, tot_partitions;
bool result= TRUE;
char *same_name;
DBUG_ENTER("partition_info::check_partition_info");
if (check_partition_function)
{
int err= 0;
if (part_type != HASH_PARTITION || !list_of_part_fields)
{
err= part_expr->walk(&Item::check_partition_func_processor, 0,
NULL);
if (!err && is_sub_partitioned() && !list_of_subpart_fields)
err= subpart_expr->walk(&Item::check_partition_func_processor, 0,
NULL);
}
if (err)
{
my_error(ER_PARTITION_FUNCTION_IS_NOT_ALLOWED, MYF(0));
goto end;
}
}
if (unlikely(!is_sub_partitioned() &&
!(use_default_subpartitions && use_default_no_subpartitions)))
{
my_error(ER_SUBPARTITION_ERROR, MYF(0));
goto end;
}
if (unlikely(is_sub_partitioned() &&
(!(part_type == RANGE_PARTITION ||
part_type == LIST_PARTITION))))
{
/* Only RANGE and LIST partitioning can be subpartitioned */
my_error(ER_SUBPARTITION_ERROR, MYF(0));
goto end;
}
if (unlikely(set_up_defaults_for_partitioning(file, info, (uint)0)))
goto end;
if (!(tot_partitions= get_tot_partitions()))
{
my_error(ER_PARTITION_NOT_DEFINED_ERROR, MYF(0), "partitions");
goto end;
}
if (unlikely(tot_partitions > MAX_PARTITIONS))
{
my_error(ER_TOO_MANY_PARTITIONS_ERROR, MYF(0));
goto end;
}
if ((same_name= has_unique_names()))
{
my_error(ER_SAME_NAME_PARTITION, MYF(0), same_name);
goto end;
}
engine_array= (handlerton**)my_malloc(tot_partitions * sizeof(handlerton *),
MYF(MY_WME));
if (unlikely(!engine_array))
goto end;
i= 0;
{
List_iterator<partition_element> part_it(partitions);
do
{
partition_element *part_elem= part_it++;
if (part_elem->engine_type == NULL)
part_elem->engine_type= default_engine_type;
if (thd->variables.sql_mode & MODE_NO_DIR_IN_CREATE)
part_elem->data_file_name= part_elem->index_file_name= 0;
if (!is_sub_partitioned())
{
if (check_table_name(part_elem->partition_name,
strlen(part_elem->partition_name)))
{
my_error(ER_WRONG_PARTITION_NAME, MYF(0));
goto end;
}
DBUG_PRINT("info", ("engine = %d",
ha_legacy_type(part_elem->engine_type)));
engine_array[part_count++]= part_elem->engine_type;
}
else
{
uint j= 0;
List_iterator<partition_element> sub_it(part_elem->subpartitions);
do
{
partition_element *sub_elem= sub_it++;
if (check_table_name(sub_elem->partition_name,
strlen(sub_elem->partition_name)))
{
my_error(ER_WRONG_PARTITION_NAME, MYF(0));
goto end;
}
if (sub_elem->engine_type == NULL)
sub_elem->engine_type= default_engine_type;
DBUG_PRINT("info", ("engine = %u",
ha_legacy_type(sub_elem->engine_type)));
engine_array[part_count++]= sub_elem->engine_type;
} while (++j < no_subparts);
}
} while (++i < no_parts);
}
if (unlikely(partition_info::check_engine_mix(engine_array, part_count)))
goto end;
if (eng_type)
*eng_type= (handlerton*)engine_array[0];
/*
We need to check all constant expressions that they are of the correct
type and that they are increasing for ranges and not overlapping for
list constants.
*/
if (fixed)
{
if (unlikely((part_type == RANGE_PARTITION && check_range_constants()) ||
(part_type == LIST_PARTITION && check_list_constants())))
goto end;
}
result= FALSE;
end:
my_free((char*)engine_array,MYF(MY_ALLOW_ZERO_PTR));
DBUG_RETURN(result);
}
/*
Print error for no partition found
SYNOPSIS
print_no_partition_found()
table Table object
RETURN VALUES
*/
void partition_info::print_no_partition_found(TABLE *table)
{
char buf[100];
char *buf_ptr= (char*)&buf;
TABLE_LIST table_list;
bzero(&table_list, sizeof(table_list));
table_list.db= table->s->db.str;
table_list.table_name= table->s->table_name.str;
if (check_single_table_access(current_thd,
SELECT_ACL, &table_list, TRUE))
my_message(ER_NO_PARTITION_FOR_GIVEN_VALUE,
ER(ER_NO_PARTITION_FOR_GIVEN_VALUE_SILENT), MYF(0));
else
{
my_bitmap_map *old_map= dbug_tmp_use_all_columns(table, table->read_set);
if (part_expr->null_value)
buf_ptr= (char*)"NULL";
else
longlong2str(err_value, buf,
part_expr->unsigned_flag ? 10 : -10);
my_error(ER_NO_PARTITION_FOR_GIVEN_VALUE, MYF(0), buf_ptr);
dbug_tmp_restore_column_map(table->read_set, old_map);
}
}
/*
Set up buffers and arrays for fields requiring preparation
SYNOPSIS
set_up_charset_field_preps()
RETURN VALUES
TRUE Memory Allocation error
FALSE Success
DESCRIPTION
Set up arrays and buffers for fields that require special care for
calculation of partition id. This is used for string fields with
variable length or string fields with fixed length that isn't using
the binary collation.
*/
bool partition_info::set_up_charset_field_preps()
{
Field *field, **ptr;
uchar **char_ptrs;
unsigned i;
bool found;
size_t size;
uint tot_fields= 0;
uint tot_part_fields= 0;
uint tot_subpart_fields= 0;
DBUG_ENTER("set_up_charset_field_preps");
if (!(part_type == HASH_PARTITION &&
list_of_part_fields) &&
check_part_func_fields(part_field_array, FALSE))
{
ptr= part_field_array;
/* Set up arrays and buffers for those fields */
i= 0;
while ((field= *(ptr++)))
{
if (field_is_partition_charset(field))
{
tot_part_fields++;
tot_fields++;
}
}
size= tot_part_fields * sizeof(char*);
if (!(char_ptrs= (uchar**)sql_calloc(size)))
goto error;
part_field_buffers= char_ptrs;
if (!(char_ptrs= (uchar**)sql_calloc(size)))
goto error;
restore_part_field_ptrs= char_ptrs;
size= (tot_part_fields + 1) * sizeof(Field*);
if (!(char_ptrs= (uchar**)sql_alloc(size)))
goto error;
part_charset_field_array= (Field**)char_ptrs;
ptr= part_field_array;
i= 0;
while ((field= *(ptr++)))
{
if (field_is_partition_charset(field))
{
uchar *field_buf;
size= field->pack_length();
if (!(field_buf= (uchar*) sql_calloc(size)))
goto error;
part_charset_field_array[i]= field;
part_field_buffers[i++]= field_buf;
}
}
part_charset_field_array[i]= NULL;
}
if (is_sub_partitioned() && list_of_subpart_fields &&
check_part_func_fields(subpart_field_array, FALSE))
{
/* Set up arrays and buffers for those fields */
ptr= subpart_field_array;
while ((field= *(ptr++)))
{
if (field_is_partition_charset(field))
tot_subpart_fields++;
}
size= tot_subpart_fields * sizeof(char*);
if (!(char_ptrs= (uchar**) sql_calloc(size)))
goto error;
subpart_field_buffers= char_ptrs;
if (!(char_ptrs= (uchar**) sql_calloc(size)))
goto error;
restore_subpart_field_ptrs= char_ptrs;
size= (tot_subpart_fields + 1) * sizeof(Field*);
if (!(char_ptrs= (uchar**) sql_alloc(size)))
goto error;
subpart_charset_field_array= (Field**)char_ptrs;
i= 0;
while ((field= *(ptr++)))
{
unsigned j= 0;
CHARSET_INFO *cs;
uchar *field_buf;
LINT_INIT(field_buf);
if (!field_is_partition_charset(field))
continue;
cs= ((Field_str*)field)->charset();
size= field->pack_length();
found= FALSE;
for (j= 0; j < tot_part_fields; j++)
{
if (field == part_charset_field_array[i])
found= TRUE;
}
if (!found)
{
tot_fields++;
if (!(field_buf= (uchar*) sql_calloc(size)))
goto error;
}
subpart_field_buffers[i++]= field_buf;
}
if (!(char_ptrs= (uchar**) sql_calloc(size)))
goto error;
restore_subpart_field_ptrs= char_ptrs;
}
if (tot_fields)
{
uint j,k,l;
size= tot_fields*sizeof(char**);
if (!(char_ptrs= (uchar**)sql_calloc(size)))
goto error;
full_part_field_buffers= char_ptrs;
if (!(char_ptrs= (uchar**)sql_calloc(size)))
goto error;
restore_full_part_field_ptrs= char_ptrs;
size= (tot_fields + 1) * sizeof(char**);
if (!(char_ptrs= (uchar**)sql_calloc(size)))
goto error;
full_part_charset_field_array= (Field**)char_ptrs;
for (i= 0; i < tot_part_fields; i++)
{
full_part_charset_field_array[i]= part_charset_field_array[i];
full_part_field_buffers[i]= part_field_buffers[i];
}
k= tot_part_fields;
l= 0;
for (i= 0; i < tot_subpart_fields; i++)
{
field= subpart_charset_field_array[i];
found= FALSE;
for (j= 0; j < tot_part_fields; j++)
{
if (field == part_charset_field_array[i])
found= TRUE;
}
if (!found)
{
full_part_charset_field_array[l]= subpart_charset_field_array[k];
full_part_field_buffers[l]= subpart_field_buffers[k];
k++; l++;
}
}
full_part_charset_field_array[tot_fields]= NULL;
}
DBUG_RETURN(FALSE);
error:
mem_alloc_error(size);
DBUG_RETURN(TRUE);
}
#endif /* WITH_PARTITION_STORAGE_ENGINE */
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