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WL#3567 - MERGE engine: a check for underlying table conformance

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When a merge table is opened compare column and key definition of
underlying tables against column and key definition of merge table.

If any of underlying tables have different column/key definition
refuse to open merge table.


mysql-test/r/merge.result:
  A test case for WL#3456.
mysql-test/t/merge.test:
  A test case for WL#3456.
sql/ha_myisam.cc:
  Moved a part of code that converts TABLE object to MyISAM key and column
  definition to a separate function.
  
  Added check_definition() function that compares MyISAM table definitions.
sql/ha_myisammrg.cc:
  Check if underlying table definition conforms to merge table definition,
  and in case underlying table definition differs, refuse to open merge
  table.
This commit is contained in:
unknown 2007-01-31 16:15:20 +04:00
parent 402c0426ff
commit f7b3c7c531
4 changed files with 404 additions and 180 deletions
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22
mysql-test/r/merge.result
View file

@ -770,7 +770,7 @@ CREATE TABLE t1(a INT);
INSERT INTO t1 VALUES(2),(1);
CREATE TABLE t2(a INT, KEY(a)) ENGINE=MERGE UNION=(t1);
SELECT * FROM t2 WHERE a=2;
ERROR HY000: Got error 124 from storage engine
ERROR HY000: Unable to open underlying table which is differently defined or of non-MyISAM type or doesn't exist
DROP TABLE t1, t2;
CREATE TABLE t1(a INT) ENGINE=MEMORY;
CREATE TABLE t2(a INT) ENGINE=MERGE UNION=(t1);
@ -781,3 +781,23 @@ CREATE TABLE t2(a INT) ENGINE=MERGE UNION=(t3);
SELECT * FROM t2;
ERROR HY000: Unable to open underlying table which is differently defined or of non-MyISAM type or doesn't exist
DROP TABLE t2;
CREATE TABLE t1(a INT, b TEXT);
CREATE TABLE tm1(a TEXT, b INT) ENGINE=MERGE UNION=(t1);
SELECT * FROM tm1;
ERROR HY000: Unable to open underlying table which is differently defined or of non-MyISAM type or doesn't exist
DROP TABLE t1, tm1;
CREATE TABLE t1(a SMALLINT, b SMALLINT);
CREATE TABLE tm1(a INT) ENGINE=MERGE UNION=(t1);
SELECT * FROM tm1;
ERROR HY000: Unable to open underlying table which is differently defined or of non-MyISAM type or doesn't exist
DROP TABLE t1, tm1;
CREATE TABLE t1(a SMALLINT, b SMALLINT, KEY(a, b));
CREATE TABLE tm1(a SMALLINT, b SMALLINT, KEY(a)) ENGINE=MERGE UNION=(t1);
SELECT * FROM tm1;
ERROR HY000: Unable to open underlying table which is differently defined or of non-MyISAM type or doesn't exist
DROP TABLE t1, tm1;
CREATE TABLE t1(a SMALLINT, b SMALLINT, KEY(b));
CREATE TABLE tm1(a SMALLINT, b SMALLINT, KEY(a)) ENGINE=MERGE UNION=(t1);
SELECT * FROM tm1;
ERROR HY000: Unable to open underlying table which is differently defined or of non-MyISAM type or doesn't exist
DROP TABLE t1, tm1;

29
mysql-test/t/merge.test
View file

@ -383,7 +383,7 @@ drop table t1, t2, t3;
CREATE TABLE t1(a INT);
INSERT INTO t1 VALUES(2),(1);
CREATE TABLE t2(a INT, KEY(a)) ENGINE=MERGE UNION=(t1);
--error 1030
--error 1168
SELECT * FROM t2 WHERE a=2;
DROP TABLE t1, t2;
@ -401,4 +401,31 @@ CREATE TABLE t2(a INT) ENGINE=MERGE UNION=(t3);
SELECT * FROM t2;
DROP TABLE t2;
#
# Underlying table definition conformance tests.
#
CREATE TABLE t1(a INT, b TEXT);
CREATE TABLE tm1(a TEXT, b INT) ENGINE=MERGE UNION=(t1);
--error 1168
SELECT * FROM tm1;
DROP TABLE t1, tm1;
CREATE TABLE t1(a SMALLINT, b SMALLINT);
CREATE TABLE tm1(a INT) ENGINE=MERGE UNION=(t1);
--error 1168
SELECT * FROM tm1;
DROP TABLE t1, tm1;
CREATE TABLE t1(a SMALLINT, b SMALLINT, KEY(a, b));
CREATE TABLE tm1(a SMALLINT, b SMALLINT, KEY(a)) ENGINE=MERGE UNION=(t1);
--error 1168
SELECT * FROM tm1;
DROP TABLE t1, tm1;
CREATE TABLE t1(a SMALLINT, b SMALLINT, KEY(b));
CREATE TABLE tm1(a SMALLINT, b SMALLINT, KEY(a)) ENGINE=MERGE UNION=(t1);
--error 1168
SELECT * FROM tm1;
DROP TABLE t1, tm1;
# End of 4.1 tests

459
sql/ha_myisam.cc
View file

@ -91,6 +91,296 @@ static void mi_check_print_msg(MI_CHECK *param, const char* msg_type,
return;
}
/*
Convert TABLE object to MyISAM key and column definition
SYNOPSIS
table2myisam()
table_arg in TABLE object.
keydef_out out MyISAM key definition.
recinfo_out out MyISAM column definition.
records_out out Number of fields.
DESCRIPTION
This function will allocate and initialize MyISAM key and column
definition for further use in mi_create or for a check for underlying
table conformance in merge engine.
RETURN VALUE
0 OK
!0 error code
*/
int table2myisam(TABLE *table_arg, MI_KEYDEF **keydef_out,
MI_COLUMNDEF **recinfo_out, uint *records_out)
{
uint i, j, recpos, minpos, fieldpos, temp_length, length;
uint options= table_arg->db_options_in_use;
enum ha_base_keytype type= HA_KEYTYPE_BINARY;
KEY *pos;
MI_KEYDEF *keydef;
MI_COLUMNDEF *recinfo, *recinfo_pos;
HA_KEYSEG *keyseg;
DBUG_ENTER("table2myisam");
if (!(my_multi_malloc(MYF(MY_WME),
recinfo_out, (table_arg->fields * 2 + 2) * sizeof(MI_COLUMNDEF),
keydef_out, table_arg->keys * sizeof(MI_KEYDEF),
&keyseg,
(table_arg->key_parts + table_arg->keys) * sizeof(HA_KEYSEG),
NullS)))
DBUG_RETURN(HA_ERR_OUT_OF_MEM); /* purecov: inspected */
keydef= *keydef_out;
recinfo= *recinfo_out;
pos= table_arg->key_info;
for (i= 0; i < table_arg->keys; i++, pos++)
{
keydef[i].flag= (pos->flags & (HA_NOSAME | HA_FULLTEXT | HA_SPATIAL));
keydef[i].key_alg= pos->algorithm == HA_KEY_ALG_UNDEF ?
(pos->flags & HA_SPATIAL ? HA_KEY_ALG_RTREE : HA_KEY_ALG_BTREE) :
pos->algorithm;
keydef[i].seg= keyseg;
keydef[i].keysegs= pos->key_parts;
for (j= 0; j < pos->key_parts; j++)
{
keydef[i].seg[j].flag= pos->key_part[j].key_part_flag;
Field *field= pos->key_part[j].field;
type= field->key_type();
if (options & HA_OPTION_PACK_KEYS ||
(pos->flags & (HA_PACK_KEY | HA_BINARY_PACK_KEY |
HA_SPACE_PACK_USED)))
{
if (pos->key_part[j].length > 8 &&
(type == HA_KEYTYPE_TEXT ||
type == HA_KEYTYPE_NUM ||
(type == HA_KEYTYPE_BINARY && !field->zero_pack())))
{
/* No blobs here */
if (j == 0)
keydef[i].flag|= HA_PACK_KEY;
if (!(field->flags & ZEROFILL_FLAG) &&
(field->type() == FIELD_TYPE_STRING ||
field->type() == FIELD_TYPE_VAR_STRING ||
((int) (pos->key_part[j].length - field->decimals())) >= 4))
keydef[i].seg[j].flag|= HA_SPACE_PACK;
}
else if (j == 0 && (!(pos->flags & HA_NOSAME) || pos->key_length > 16))
keydef[i].flag|= HA_BINARY_PACK_KEY;
}
keydef[i].seg[j].type= (int) type;
keydef[i].seg[j].start= pos->key_part[j].offset;
keydef[i].seg[j].length= pos->key_part[j].length;
keydef[i].seg[j].bit_start= keydef[i].seg[j].bit_end= 0;
keydef[i].seg[j].language= field->charset()->number;
if (field->null_ptr)
{
keydef[i].seg[j].null_bit= field->null_bit;
keydef[i].seg[j].null_pos= (uint) (field->null_ptr-
(uchar*) table_arg->record[0]);
}
else
{
keydef[i].seg[j].null_bit= 0;
keydef[i].seg[j].null_pos= 0;
}
if (field->type() == FIELD_TYPE_BLOB ||
field->type() == FIELD_TYPE_GEOMETRY)
{
keydef[i].seg[j].flag|= HA_BLOB_PART;
/* save number of bytes used to pack length */
keydef[i].seg[j].bit_start= (uint) (field->pack_length() -
table_arg->blob_ptr_size);
}
}
keyseg+= pos->key_parts;
}
if (table_arg->found_next_number_field)
keydef[table_arg->next_number_index].flag|= HA_AUTO_KEY;
recpos= 0;
recinfo_pos= recinfo;
while (recpos < (uint) table_arg->reclength)
{
Field **field, *found= 0;
minpos= table_arg->reclength;
length= 0;
for (field= table_arg->field; *field; field++)
{
if ((fieldpos= (*field)->offset()) >= recpos &&
fieldpos <= minpos)
{
/* skip null fields */
if (!(temp_length= (*field)->pack_length()))
continue; /* Skip null-fields */
if (! found || fieldpos < minpos ||
(fieldpos == minpos && temp_length < length))
{
minpos= fieldpos;
found= *field;
length= temp_length;
}
}
}
DBUG_PRINT("loop", ("found: %lx recpos: %d minpos: %d length: %d",
(long) found, recpos, minpos, length));
if (recpos != minpos)
{ // Reserved space (Null bits?)
bzero((char*) recinfo_pos, sizeof(*recinfo_pos));
recinfo_pos->type= (int) FIELD_NORMAL;
recinfo_pos++->length= (uint16) (minpos - recpos);
}
if (!found)
break;
if (found->flags & BLOB_FLAG)
{
recinfo_pos->type= (int) FIELD_BLOB;
}
else if (!(options & HA_OPTION_PACK_RECORD))
recinfo_pos->type= (int) FIELD_NORMAL;
else if (found->zero_pack())
recinfo_pos->type= (int) FIELD_SKIP_ZERO;
else
recinfo_pos->type= (int) ((length <= 3 ||
(found->flags & ZEROFILL_FLAG)) ?
FIELD_NORMAL :
found->type() == FIELD_TYPE_STRING ||
found->type() == FIELD_TYPE_VAR_STRING ?
FIELD_SKIP_ENDSPACE :
FIELD_SKIP_PRESPACE);
if (found->null_ptr)
{
recinfo_pos->null_bit= found->null_bit;
recinfo_pos->null_pos= (uint) (found->null_ptr -
(uchar*) table_arg->record[0]);
}
else
{
recinfo_pos->null_bit= 0;
recinfo_pos->null_pos= 0;
}
(recinfo_pos++)->length= (uint16) length;
recpos= minpos + length;
DBUG_PRINT("loop", ("length: %d type: %d",
recinfo_pos[-1].length,recinfo_pos[-1].type));
}
*records_out= (uint) (recinfo_pos - recinfo);
DBUG_RETURN(0);
}
/*
Check for underlying table conformance
SYNOPSIS
check_definition()
t1_keyinfo in First table key definition
t1_recinfo in First table record definition
t1_keys in Number of keys in first table
t1_recs in Number of records in first table
t2_keyinfo in Second table key definition
t2_recinfo in Second table record definition
t2_keys in Number of keys in second table
t2_recs in Number of records in second table
strict in Strict check switch
DESCRIPTION
This function compares two MyISAM definitions. By intention it was done
to compare merge table definition against underlying table definition.
It may also be used to compare dot-frm and MYI definitions of MyISAM
table as well to compare different MyISAM table definitions.
For merge table it is not required that number of keys in merge table
must exactly match number of keys in underlying table. When calling this
function for underlying table conformance check, 'strict' flag must be
set to false, and converted merge definition must be passed as t1_*.
Otherwise 'strict' flag must be set to 1 and it is not required to pass
converted dot-frm definition as t1_*.
RETURN VALUE
0 - Equal definitions.
1 - Different definitions.
*/
int check_definition(MI_KEYDEF *t1_keyinfo, MI_COLUMNDEF *t1_recinfo,
uint t1_keys, uint t1_recs,
MI_KEYDEF *t2_keyinfo, MI_COLUMNDEF *t2_recinfo,
uint t2_keys, uint t2_recs, bool strict)
{
uint i, j;
DBUG_ENTER("check_definition");
if ((strict ? t1_keys != t2_keys : t1_keys > t2_keys))
{
DBUG_PRINT("error", ("Number of keys differs: t1_keys=%u, t2_keys=%u",
t1_keys, t2_keys));
DBUG_RETURN(1);
}
if (t1_recs != t2_recs)
{
DBUG_PRINT("error", ("Number of recs differs: t1_recs=%u, t2_recs=%u",
t1_recs, t2_recs));
DBUG_RETURN(1);
}
for (i= 0; i < t1_keys; i++)
{
HA_KEYSEG *t1_keysegs= t1_keyinfo[i].seg;
HA_KEYSEG *t2_keysegs= t2_keyinfo[i].seg;
if (t1_keyinfo[i].keysegs != t2_keyinfo[i].keysegs ||
t1_keyinfo[i].key_alg != t2_keyinfo[i].key_alg)
{
DBUG_PRINT("error", ("Key %d has different definition", i));
DBUG_PRINT("error", ("t1_keysegs=%d, t1_key_alg=%d",
t1_keyinfo[i].keysegs, t1_keyinfo[i].key_alg));
DBUG_PRINT("error", ("t2_keysegs=%d, t2_key_alg=%d",
t2_keyinfo[i].keysegs, t2_keyinfo[i].key_alg));
DBUG_RETURN(1);
}
for (j= t1_keyinfo[i].keysegs; j--;)
{
if (t1_keysegs[j].type != t2_keysegs[j].type ||
t1_keysegs[j].language != t2_keysegs[j].language ||
t1_keysegs[j].null_bit != t2_keysegs[j].null_bit ||
t1_keysegs[j].length != t2_keysegs[j].length)
{
DBUG_PRINT("error", ("Key segment %d (key %d) has different "
"definition", j, i));
DBUG_PRINT("error", ("t1_type=%d, t1_language=%d, t1_null_bit=%d, "
"t1_length=%d",
t1_keysegs[j].type, t1_keysegs[j].language,
t1_keysegs[j].null_bit, t1_keysegs[j].length));
DBUG_PRINT("error", ("t2_type=%d, t2_language=%d, t2_null_bit=%d, "
"t2_length=%d",
t2_keysegs[j].type, t2_keysegs[j].language,
t2_keysegs[j].null_bit, t2_keysegs[j].length));
DBUG_RETURN(1);
}
}
}
for (i= 0; i < t1_recs; i++)
{
MI_COLUMNDEF *t1_rec= &t1_recinfo[i];
MI_COLUMNDEF *t2_rec= &t2_recinfo[i];
if (t1_rec->type != t2_rec->type ||
t1_rec->length != t2_rec->length ||
t1_rec->null_bit != t2_rec->null_bit)
{
DBUG_PRINT("error", ("Field %d has different definition", i));
DBUG_PRINT("error", ("t1_type=%d, t1_length=%d, t1_null_bit=%d",
t1_rec->type, t1_rec->length, t1_rec->null_bit));
DBUG_PRINT("error", ("t2_type=%d, t2_length=%d, t2_null_bit=%d",
t2_rec->type, t2_rec->length, t2_rec->null_bit));
DBUG_RETURN(1);
}
}
DBUG_RETURN(0);
}
extern "C" {
volatile my_bool *killed_ptr(MI_CHECK *param)
@ -1345,169 +1635,18 @@ int ha_myisam::create(const char *name, register TABLE *table_arg,
HA_CREATE_INFO *info)
{
int error;
uint i,j,recpos,minpos,fieldpos,temp_length,length, create_flags= 0;
bool found_real_auto_increment=0;
enum ha_base_keytype type;
uint create_flags= 0, options= table_arg->db_options_in_use, records;
char buff[FN_REFLEN];
KEY *pos;
MI_KEYDEF *keydef;
MI_COLUMNDEF *recinfo,*recinfo_pos;
HA_KEYSEG *keyseg;
uint options=table_arg->db_options_in_use;
DBUG_ENTER("ha_myisam::create");
type=HA_KEYTYPE_BINARY; // Keep compiler happy
if (!(my_multi_malloc(MYF(MY_WME),
&recinfo,(table_arg->fields*2+2)*sizeof(MI_COLUMNDEF),
&keydef, table_arg->keys*sizeof(MI_KEYDEF),
&keyseg,
((table_arg->key_parts + table_arg->keys) *
sizeof(HA_KEYSEG)),
NullS)))
DBUG_RETURN(HA_ERR_OUT_OF_MEM);
pos=table_arg->key_info;
for (i=0; i < table_arg->keys ; i++, pos++)
{
keydef[i].flag= (pos->flags & (HA_NOSAME | HA_FULLTEXT | HA_SPATIAL));
keydef[i].key_alg= pos->algorithm == HA_KEY_ALG_UNDEF ?
(pos->flags & HA_SPATIAL ? HA_KEY_ALG_RTREE : HA_KEY_ALG_BTREE) :
pos->algorithm;
keydef[i].seg=keyseg;
keydef[i].keysegs=pos->key_parts;
for (j=0 ; j < pos->key_parts ; j++)
{
keydef[i].seg[j].flag=pos->key_part[j].key_part_flag;
Field *field=pos->key_part[j].field;
type=field->key_type();
if (options & HA_OPTION_PACK_KEYS ||
(pos->flags & (HA_PACK_KEY | HA_BINARY_PACK_KEY |
HA_SPACE_PACK_USED)))
{
if (pos->key_part[j].length > 8 &&
(type == HA_KEYTYPE_TEXT ||
type == HA_KEYTYPE_NUM ||
(type == HA_KEYTYPE_BINARY && !field->zero_pack())))
{
/* No blobs here */
if (j == 0)
keydef[i].flag|=HA_PACK_KEY;
if (!(field->flags & ZEROFILL_FLAG) &&
(field->type() == FIELD_TYPE_STRING ||
field->type() == FIELD_TYPE_VAR_STRING ||
((int) (pos->key_part[j].length - field->decimals()))
>= 4))
keydef[i].seg[j].flag|=HA_SPACE_PACK;
}
else if (j == 0 && (!(pos->flags & HA_NOSAME) || pos->key_length > 16))
keydef[i].flag|= HA_BINARY_PACK_KEY;
}
keydef[i].seg[j].type= (int) type;
keydef[i].seg[j].start= pos->key_part[j].offset;
keydef[i].seg[j].length= pos->key_part[j].length;
keydef[i].seg[j].bit_start=keydef[i].seg[j].bit_end=0;
keydef[i].seg[j].language = field->charset()->number;
if (field->null_ptr)
{
keydef[i].seg[j].null_bit=field->null_bit;
keydef[i].seg[j].null_pos= (uint) (field->null_ptr-
(uchar*) table_arg->record[0]);
}
else
{
keydef[i].seg[j].null_bit=0;
keydef[i].seg[j].null_pos=0;
}
if (field->type() == FIELD_TYPE_BLOB ||
field->type() == FIELD_TYPE_GEOMETRY)
{
keydef[i].seg[j].flag|=HA_BLOB_PART;
/* save number of bytes used to pack length */
keydef[i].seg[j].bit_start= (uint) (field->pack_length() -
table_arg->blob_ptr_size);
}
}
keyseg+=pos->key_parts;
}
if (table_arg->found_next_number_field)
{
keydef[table_arg->next_number_index].flag|= HA_AUTO_KEY;
found_real_auto_increment= table_arg->next_number_key_offset == 0;
}
recpos=0; recinfo_pos=recinfo;
while (recpos < (uint) table_arg->reclength)
{
Field **field,*found=0;
minpos=table_arg->reclength; length=0;
for (field=table_arg->field ; *field ; field++)
{
if ((fieldpos=(*field)->offset()) >= recpos &&
fieldpos <= minpos)
{
/* skip null fields */
if (!(temp_length= (*field)->pack_length()))
continue; /* Skip null-fields */
if (! found || fieldpos < minpos ||
(fieldpos == minpos && temp_length < length))
{
minpos=fieldpos; found= *field; length=temp_length;
}
}
}
DBUG_PRINT("loop",("found: %lx recpos: %d minpos: %d length: %d",
found,recpos,minpos,length));
if (recpos != minpos)
{ // Reserved space (Null bits?)
bzero((char*) recinfo_pos,sizeof(*recinfo_pos));
recinfo_pos->type=(int) FIELD_NORMAL;
recinfo_pos++->length= (uint16) (minpos-recpos);
}
if (! found)
break;
if (found->flags & BLOB_FLAG)
{
recinfo_pos->type= (int) FIELD_BLOB;
}
else if (!(options & HA_OPTION_PACK_RECORD))
recinfo_pos->type= (int) FIELD_NORMAL;
else if (found->zero_pack())
recinfo_pos->type= (int) FIELD_SKIP_ZERO;
else
recinfo_pos->type= (int) ((length <= 3 ||
(found->flags & ZEROFILL_FLAG)) ?
FIELD_NORMAL :
found->type() == FIELD_TYPE_STRING ||
found->type() == FIELD_TYPE_VAR_STRING ?
FIELD_SKIP_ENDSPACE :
FIELD_SKIP_PRESPACE);
if (found->null_ptr)
{
recinfo_pos->null_bit=found->null_bit;
recinfo_pos->null_pos= (uint) (found->null_ptr-
(uchar*) table_arg->record[0]);
}
else
{
recinfo_pos->null_bit=0;
recinfo_pos->null_pos=0;
}
(recinfo_pos++) ->length=(uint16) length;
recpos=minpos+length;
DBUG_PRINT("loop",("length: %d type: %d",
recinfo_pos[-1].length,recinfo_pos[-1].type));
}
MI_COLUMNDEF *recinfo;
MI_CREATE_INFO create_info;
DBUG_ENTER("ha_myisam::create");
if ((error= table2myisam(table_arg, &keydef, &recinfo, &records)))
DBUG_RETURN(error); /* purecov: inspected */
bzero((char*) &create_info, sizeof(create_info));
create_info.max_rows= table_arg->max_rows;
create_info.reloc_rows= table_arg->min_rows;
create_info.with_auto_increment=found_real_auto_increment;
create_info.with_auto_increment= table_arg->next_number_key_offset == 0;
create_info.auto_increment= (info->auto_increment_value ?
info->auto_increment_value -1 :
(ulonglong) 0);
@ -1531,12 +1670,12 @@ int ha_myisam::create(const char *name, register TABLE *table_arg,
create_flags|= HA_CREATE_DELAY_KEY_WRITE;
/* TODO: Check that the following fn_format is really needed */
error=mi_create(fn_format(buff,name,"","",2+4),
error= mi_create(fn_format(buff, name, "", "",
MY_UNPACK_FILENAME|MY_REPLACE_EXT),
table_arg->keys, keydef,
(uint) (recinfo_pos-recinfo), recinfo,
records, recinfo,
0, (MI_UNIQUEDEF*) 0,
&create_info, create_flags);
my_free((gptr) recinfo, MYF(0));
DBUG_RETURN(error);
}

42
sql/ha_myisammrg.cc
View file

@ -32,6 +32,13 @@
** MyISAM MERGE tables
*****************************************************************************/
extern int table2myisam(TABLE *table_arg, MI_KEYDEF **keydef_out,
MI_COLUMNDEF **recinfo_out, uint *records_out);
extern int check_definition(MI_KEYDEF *t1_keyinfo, MI_COLUMNDEF *t1_recinfo,
uint t1_keys, uint t1_recs,
MI_KEYDEF *t2_keyinfo, MI_COLUMNDEF *t2_recinfo,
uint t2_keys, uint t2_recs, bool strict);
const char **ha_myisammrg::bas_ext() const
{ static const char *ext[]= { ".MRG", NullS }; return ext; }
@ -49,6 +56,12 @@ const char *ha_myisammrg::index_type(uint key_number)
int ha_myisammrg::open(const char *name, int mode, uint test_if_locked)
{
MI_KEYDEF *keyinfo;
MI_COLUMNDEF *recinfo;
MYRG_TABLE *u_table;
uint recs;
uint keys= table->keys;
int error;
char name_buff[FN_REFLEN];
DBUG_PRINT("info", ("ha_myisammrg::open"));
@ -69,20 +82,45 @@ int ha_myisammrg::open(const char *name, int mode, uint test_if_locked)
if (table->reclength != mean_rec_length && mean_rec_length)
{
DBUG_PRINT("error",("reclength: %d mean_rec_length: %d",
DBUG_PRINT("error",("reclength: %d mean_rec_length: %lu",
table->reclength, mean_rec_length));
error= HA_ERR_WRONG_MRG_TABLE_DEF;
goto err;
}
if ((error= table2myisam(table, &keyinfo, &recinfo, &recs)))
{
/* purecov: begin inspected */
DBUG_PRINT("error", ("Failed to convert TABLE object to MyISAM "
"key and column definition"));
goto err;
/* purecov: end */
}
for (u_table= file->open_tables; u_table < file->end_table; u_table++)
{
if (check_definition(keyinfo, recinfo, keys, recs,
u_table->table->s->keyinfo, u_table->table->s->rec,
u_table->table->s->base.keys,
u_table->table->s->base.fields, false))
{
my_free((gptr) recinfo, MYF(0));
error= HA_ERR_WRONG_MRG_TABLE_DEF;
goto err;
}
}
my_free((gptr) recinfo, MYF(0));
#if !defined(BIG_TABLES) || SIZEOF_OFF_T == 4
/* Merge table has more than 2G rows */
if (table->crashed)
{
error= HA_ERR_WRONG_MRG_TABLE_DEF;
goto err;
}
#endif
return (0);
err:
myrg_close(file);
file=0;
return (my_errno= HA_ERR_WRONG_MRG_TABLE_DEF);
return (my_errno= error);
}
int ha_myisammrg::close(void)