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cleanup: style fixes, sql_join_cache.cc

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This commit is contained in:
Sergei Golubchik
2017-02-01 16:41:17 +01:00
parent 8246b0ac50
commit 5d7607f340
4 changed files with 291 additions and 296 deletions
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2
mysql-test/r/join_cache.result
View File

@@ -5609,7 +5609,7 @@ set join_cache_level = default;
set optimizer_switch=@tmp_optimizer_switch; set optimizer_switch=@tmp_optimizer_switch;
DROP TABLE t1,t2,t3; DROP TABLE t1,t2,t3;
# #
# Bug #925985: LEFT JOIN with optimize_join_buffer_size=off + # lp:925985 LEFT JOIN with optimize_join_buffer_size=off +
# join_buffer_size > join_buffer_space_limit # join_buffer_size > join_buffer_space_limit
# #
CREATE TABLE t1 (a int); CREATE TABLE t1 (a int);

2
mysql-test/t/join_cache.test
View File

@@ -3587,7 +3587,7 @@ set optimizer_switch=@tmp_optimizer_switch;
DROP TABLE t1,t2,t3; DROP TABLE t1,t2,t3;
--echo # --echo #
--echo # Bug #925985: LEFT JOIN with optimize_join_buffer_size=off + --echo # lp:925985 LEFT JOIN with optimize_join_buffer_size=off +
--echo # join_buffer_size > join_buffer_space_limit --echo # join_buffer_size > join_buffer_space_limit
--echo # --echo #

228
sql/sql_join_cache.cc
View File

@@ -1376,7 +1376,8 @@ uint JOIN_CACHE::write_record_data(uchar * link, bool *is_full)
if (copy->referenced_field_no) if (copy->referenced_field_no)
copy->offset= cp-curr_rec_pos; copy->offset= cp-curr_rec_pos;
if (copy->type == CACHE_BLOB) switch (copy->type) {
case CACHE_BLOB:
{ {
Field_blob *blob_field= (Field_blob *) copy->field; Field_blob *blob_field= (Field_blob *) copy->field;
if (last_record) if (last_record)
@@ -1397,10 +1398,8 @@ uint JOIN_CACHE::write_record_data(uchar * link, bool *is_full)
memcpy(cp+copy->length, copy->str, copy->blob_length); memcpy(cp+copy->length, copy->str, copy->blob_length);
cp+= copy->length+copy->blob_length; cp+= copy->length+copy->blob_length;
} }
break;
} }
else
{
switch (copy->type) {
case CACHE_VARSTR1: case CACHE_VARSTR1:
/* Copy the significant part of the short varstring field */ /* Copy the significant part of the short varstring field */
len= (uint) copy->str[0] + 1; len= (uint) copy->str[0] + 1;
@@ -1461,7 +1460,6 @@ uint JOIN_CACHE::write_record_data(uchar * link, bool *is_full)
cp+= copy->length; cp+= copy->length;
} }
} }
}
/* Add the offsets of the fields that are referenced from other caches */ /* Add the offsets of the fields that are referenced from other caches */
if (referenced_fields) if (referenced_fields)
@@ -1717,7 +1715,7 @@ uint JOIN_CACHE::aux_buffer_incr(ulong recno)
The function reads all flag and data fields of a record from the join The function reads all flag and data fields of a record from the join
buffer into the corresponding record buffers. buffer into the corresponding record buffers.
The fields are read starting from the position 'pos' which is The fields are read starting from the position 'pos' which is
supposed to point to the beginning og the first record field. supposed to point to the beginning of the first record field.
The function increments the value of 'pos' by the length of the The function increments the value of 'pos' by the length of the
read data. read data.
@@ -1811,7 +1809,8 @@ uint JOIN_CACHE::read_record_field(CACHE_FIELD *copy, bool blob_in_rec_buff)
/* Do not copy the field if its value is null */ /* Do not copy the field if its value is null */
if (copy->field && copy->field->maybe_null() && copy->field->is_null()) if (copy->field && copy->field->maybe_null() && copy->field->is_null())
return 0; return 0;
if (copy->type == CACHE_BLOB) switch (copy->type) {
case CACHE_BLOB:
{ {
Field_blob *blob_field= (Field_blob *) copy->field; Field_blob *blob_field= (Field_blob *) copy->field;
/* /*
@@ -1820,19 +1819,17 @@ uint JOIN_CACHE::read_record_field(CACHE_FIELD *copy, bool blob_in_rec_buff)
*/ */
if (blob_in_rec_buff) if (blob_in_rec_buff)
{ {
blob_field->set_image(pos, copy->length+sizeof(char*), blob_field->set_image(pos, copy->length + sizeof(char*),
blob_field->charset()); blob_field->charset());
len= copy->length+sizeof(char*); len= copy->length + sizeof(char*);
} }
else else
{ {
blob_field->set_ptr(pos, pos+copy->length); blob_field->set_ptr(pos, pos+copy->length);
len= copy->length+blob_field->get_length(); len= copy->length + blob_field->get_length();
} }
} }
else break;
{
switch (copy->type) {
case CACHE_VARSTR1: case CACHE_VARSTR1:
/* Copy the significant part of the short varstring field */ /* Copy the significant part of the short varstring field */
len= (uint) pos[0] + 1; len= (uint) pos[0] + 1;
@@ -1862,7 +1859,6 @@ uint JOIN_CACHE::read_record_field(CACHE_FIELD *copy, bool blob_in_rec_buff)
len= copy->length; len= copy->length;
memcpy(copy->str, pos, len); memcpy(copy->str, pos, len);
} }
}
pos+= len; pos+= len;
return len; return len;
} }
@@ -2718,7 +2714,7 @@ int JOIN_CACHE_HASHED::init(bool for_explain)
data_fields_offset+= copy->length; data_fields_offset+= copy->length;
} }
DBUG_RETURN(rc); DBUG_RETURN(0);
} }
@@ -3927,9 +3923,9 @@ static
void bka_range_seq_key_info(void *init_params, uint *length, void bka_range_seq_key_info(void *init_params, uint *length,
key_part_map *map) key_part_map *map)
{ {
TABLE_REF *ref= &(((JOIN_CACHE*)init_params)->join_tab->ref); TABLE_REF *ref= &(((JOIN_CACHE*)init_params)->join_tab->ref);
*length= ref->key_length; *length= ref->key_length;
*map= (key_part_map(1) << ref->key_parts) - 1; *map= (key_part_map(1) << ref->key_parts) - 1;
} }
@@ -3957,10 +3953,10 @@ RETURN VALUE
static static
range_seq_t bka_range_seq_init(void *init_param, uint n_ranges, uint flags) range_seq_t bka_range_seq_init(void *init_param, uint n_ranges, uint flags)
{ {
DBUG_ENTER("bka_range_seq_init"); DBUG_ENTER("bka_range_seq_init");
JOIN_CACHE_BKA *cache= (JOIN_CACHE_BKA *) init_param; JOIN_CACHE_BKA *cache= (JOIN_CACHE_BKA *) init_param;
cache->reset(0); cache->reset(0);
DBUG_RETURN((range_seq_t) init_param); DBUG_RETURN((range_seq_t) init_param);
} }
@@ -3988,12 +3984,12 @@ RETURN VALUE
static static
bool bka_range_seq_next(range_seq_t rseq, KEY_MULTI_RANGE *range) bool bka_range_seq_next(range_seq_t rseq, KEY_MULTI_RANGE *range)
{ {
DBUG_ENTER("bka_range_seq_next"); DBUG_ENTER("bka_range_seq_next");
JOIN_CACHE_BKA *cache= (JOIN_CACHE_BKA *) rseq; JOIN_CACHE_BKA *cache= (JOIN_CACHE_BKA *) rseq;
TABLE_REF *ref= &cache->join_tab->ref; TABLE_REF *ref= &cache->join_tab->ref;
key_range *start_key= &range->start_key; key_range *start_key= &range->start_key;
if ((start_key->length= cache->get_next_key((uchar **) &start_key->key))) if ((start_key->length= cache->get_next_key((uchar **) &start_key->key)))
{ {
start_key->keypart_map= (1 << ref->key_parts) - 1; start_key->keypart_map= (1 << ref->key_parts) - 1;
start_key->flag= HA_READ_KEY_EXACT; start_key->flag= HA_READ_KEY_EXACT;
range->end_key= *start_key; range->end_key= *start_key;
@@ -4001,8 +3997,8 @@ if ((start_key->length= cache->get_next_key((uchar **) &start_key->key)))
range->ptr= (char *) cache->get_curr_rec(); range->ptr= (char *) cache->get_curr_rec();
range->range_flag= EQ_RANGE; range->range_flag= EQ_RANGE;
DBUG_RETURN(0); DBUG_RETURN(0);
} }
DBUG_RETURN(1); DBUG_RETURN(1);
} }
@@ -4034,11 +4030,11 @@ RETURN VALUE
static static
bool bka_range_seq_skip_record(range_seq_t rseq, range_id_t range_info, uchar *rowid) bool bka_range_seq_skip_record(range_seq_t rseq, range_id_t range_info, uchar *rowid)
{ {
DBUG_ENTER("bka_range_seq_skip_record"); DBUG_ENTER("bka_range_seq_skip_record");
JOIN_CACHE_BKA *cache= (JOIN_CACHE_BKA *) rseq; JOIN_CACHE_BKA *cache= (JOIN_CACHE_BKA *) rseq;
bool res= cache->get_match_flag_by_pos((uchar *) range_info) == bool res= cache->get_match_flag_by_pos((uchar *) range_info) ==
JOIN_CACHE::MATCH_FOUND; JOIN_CACHE::MATCH_FOUND;
DBUG_RETURN(res); DBUG_RETURN(res);
} }
@@ -4065,14 +4061,14 @@ RETURN VALUE
static static
bool bka_skip_index_tuple(range_seq_t rseq, range_id_t range_info) bool bka_skip_index_tuple(range_seq_t rseq, range_id_t range_info)
{ {
DBUG_ENTER("bka_skip_index_tuple"); DBUG_ENTER("bka_skip_index_tuple");
JOIN_CACHE_BKA *cache= (JOIN_CACHE_BKA *) rseq; JOIN_CACHE_BKA *cache= (JOIN_CACHE_BKA *) rseq;
THD *thd= cache->thd(); THD *thd= cache->thd();
bool res; bool res;
status_var_increment(thd->status_var.ha_icp_attempts); status_var_increment(thd->status_var.ha_icp_attempts);
if (!(res= cache->skip_index_tuple(range_info))) if (!(res= cache->skip_index_tuple(range_info)))
status_var_increment(thd->status_var.ha_icp_match); status_var_increment(thd->status_var.ha_icp_match);
DBUG_RETURN(res); DBUG_RETURN(res);
} }
@@ -4101,10 +4097,10 @@ RETURN VALUE
bool JOIN_CACHE_BKA::prepare_look_for_matches(bool skip_last) bool JOIN_CACHE_BKA::prepare_look_for_matches(bool skip_last)
{ {
if (!records) if (!records)
return TRUE; return TRUE;
rem_records= 1; rem_records= 1;
return FALSE; return FALSE;
} }
@@ -4133,10 +4129,10 @@ RETURN VALUE
uchar *JOIN_CACHE_BKA::get_next_candidate_for_match() uchar *JOIN_CACHE_BKA::get_next_candidate_for_match()
{ {
if (!rem_records) if (!rem_records)
return 0; return 0;
rem_records--; rem_records--;
return curr_association; return curr_association;
} }
@@ -4161,7 +4157,7 @@ RETURN VALUE
bool JOIN_CACHE_BKA::skip_next_candidate_for_match(uchar *rec_ptr) bool JOIN_CACHE_BKA::skip_next_candidate_for_match(uchar *rec_ptr)
{ {
return join_tab->check_only_first_match() && return join_tab->check_only_first_match() &&
(get_match_flag_by_pos(rec_ptr) == MATCH_FOUND); (get_match_flag_by_pos(rec_ptr) == MATCH_FOUND);
} }
@@ -4189,7 +4185,7 @@ RETURN VALUE
void JOIN_CACHE_BKA::read_next_candidate_for_match(uchar *rec_ptr) void JOIN_CACHE_BKA::read_next_candidate_for_match(uchar *rec_ptr)
{ {
get_record_by_pos(rec_ptr); get_record_by_pos(rec_ptr);
} }
@@ -4216,30 +4212,29 @@ RETURN VALUE
int JOIN_CACHE_BKA::init(bool for_explain) int JOIN_CACHE_BKA::init(bool for_explain)
{ {
int res; int res;
bool check_only_first_match= join_tab->check_only_first_match(); bool check_only_first_match= join_tab->check_only_first_match();
RANGE_SEQ_IF rs_funcs= { bka_range_seq_key_info, RANGE_SEQ_IF rs_funcs= { bka_range_seq_key_info,
bka_range_seq_init, bka_range_seq_init,
bka_range_seq_next, bka_range_seq_next,
check_only_first_match ? check_only_first_match ? bka_range_seq_skip_record : 0,
bka_range_seq_skip_record : 0,
bka_skip_index_tuple }; bka_skip_index_tuple };
DBUG_ENTER("JOIN_CACHE_BKA::init"); DBUG_ENTER("JOIN_CACHE_BKA::init");
JOIN_TAB_SCAN_MRR *jsm; JOIN_TAB_SCAN_MRR *jsm;
if (!(join_tab_scan= jsm= new JOIN_TAB_SCAN_MRR(join, join_tab, if (!(join_tab_scan= jsm= new JOIN_TAB_SCAN_MRR(join, join_tab,
mrr_mode, rs_funcs))) mrr_mode, rs_funcs)))
DBUG_RETURN(1); DBUG_RETURN(1);
if ((res= JOIN_CACHE::init(for_explain))) if ((res= JOIN_CACHE::init(for_explain)))
DBUG_RETURN(res); DBUG_RETURN(res);
if (use_emb_key) if (use_emb_key)
jsm->mrr_mode |= HA_MRR_MATERIALIZED_KEYS; jsm->mrr_mode |= HA_MRR_MATERIALIZED_KEYS;
DBUG_RETURN(0); DBUG_RETURN(0);
} }
@@ -4278,48 +4273,48 @@ RETURN VALUE
uint JOIN_CACHE_BKA::get_next_key(uchar ** key) uint JOIN_CACHE_BKA::get_next_key(uchar ** key)
{ {
uint len; uint len;
uint32 rec_len; uint32 rec_len;
uchar *init_pos; uchar *init_pos;
JOIN_CACHE *cache; JOIN_CACHE *cache;
start: start:
/* Any record in a BKA cache is prepended with its length */ /* Any record in a BKA cache is prepended with its length */
DBUG_ASSERT(with_length); DBUG_ASSERT(with_length);
if ((pos+size_of_rec_len) > last_rec_pos || !records) if ((pos+size_of_rec_len) > last_rec_pos || !records)
return 0; return 0;
/* Read the length of the record */ /* Read the length of the record */
rec_len= get_rec_length(pos); rec_len= get_rec_length(pos);
pos+= size_of_rec_len; pos+= size_of_rec_len;
init_pos= pos; init_pos= pos;
/* Read a reference to the previous cache if any */ /* Read a reference to the previous cache if any */
if (prev_cache) if (prev_cache)
pos+= prev_cache->get_size_of_rec_offset(); pos+= prev_cache->get_size_of_rec_offset();
curr_rec_pos= pos; curr_rec_pos= pos;
/* Read all flag fields of the record */ /* Read all flag fields of the record */
read_flag_fields(); read_flag_fields();
if (with_match_flag && if (with_match_flag &&
(Match_flag) curr_rec_pos[0] == MATCH_IMPOSSIBLE ) (Match_flag) curr_rec_pos[0] == MATCH_IMPOSSIBLE )
{ {
pos= init_pos+rec_len; pos= init_pos+rec_len;
goto start; goto start;
} }
if (use_emb_key) if (use_emb_key)
{ {
/* An embedded key is taken directly from the join buffer */ /* An embedded key is taken directly from the join buffer */
*key= pos; *key= pos;
len= emb_key_length; len= emb_key_length;
} }
else else
{ {
/* Read key arguments from previous caches if there are any such fields */ /* Read key arguments from previous caches if there are any such fields */
if (external_key_arg_fields) if (external_key_arg_fields)
{ {
@@ -4361,11 +4356,11 @@ else
cp_buffer_from_ref(join->thd, join_tab->table, ref); cp_buffer_from_ref(join->thd, join_tab->table, ref);
*key= ref->key_buff; *key= ref->key_buff;
len= ref->key_length; len= ref->key_length;
} }
pos= init_pos+rec_len; pos= init_pos+rec_len;
return len; return len;
} }
@@ -4407,9 +4402,9 @@ RETURN VALUE
bool JOIN_CACHE_BKA::skip_index_tuple(range_id_t range_info) bool JOIN_CACHE_BKA::skip_index_tuple(range_id_t range_info)
{ {
DBUG_ENTER("JOIN_CACHE_BKA::skip_index_tuple"); DBUG_ENTER("JOIN_CACHE_BKA::skip_index_tuple");
get_record_by_pos((uchar*)range_info); get_record_by_pos((uchar*)range_info);
DBUG_RETURN(!join_tab->cache_idx_cond->val_int()); DBUG_RETURN(!join_tab->cache_idx_cond->val_int());
} }
@@ -4439,10 +4434,10 @@ RETURN VALUE
static static
range_seq_t bkah_range_seq_init(void *init_param, uint n_ranges, uint flags) range_seq_t bkah_range_seq_init(void *init_param, uint n_ranges, uint flags)
{ {
DBUG_ENTER("bkah_range_seq_init"); DBUG_ENTER("bkah_range_seq_init");
JOIN_CACHE_BKAH *cache= (JOIN_CACHE_BKAH *) init_param; JOIN_CACHE_BKAH *cache= (JOIN_CACHE_BKAH *) init_param;
cache->reset(0); cache->reset(0);
DBUG_RETURN((range_seq_t) init_param); DBUG_RETURN((range_seq_t) init_param);
} }
@@ -4470,12 +4465,12 @@ RETURN VALUE
static static
bool bkah_range_seq_next(range_seq_t rseq, KEY_MULTI_RANGE *range) bool bkah_range_seq_next(range_seq_t rseq, KEY_MULTI_RANGE *range)
{ {
DBUG_ENTER("bkah_range_seq_next"); DBUG_ENTER("bkah_range_seq_next");
JOIN_CACHE_BKAH *cache= (JOIN_CACHE_BKAH *) rseq; JOIN_CACHE_BKAH *cache= (JOIN_CACHE_BKAH *) rseq;
TABLE_REF *ref= &cache->join_tab->ref; TABLE_REF *ref= &cache->join_tab->ref;
key_range *start_key= &range->start_key; key_range *start_key= &range->start_key;
if ((start_key->length= cache->get_next_key((uchar **) &start_key->key))) if ((start_key->length= cache->get_next_key((uchar **) &start_key->key)))
{ {
start_key->keypart_map= (1 << ref->key_parts) - 1; start_key->keypart_map= (1 << ref->key_parts) - 1;
start_key->flag= HA_READ_KEY_EXACT; start_key->flag= HA_READ_KEY_EXACT;
range->end_key= *start_key; range->end_key= *start_key;
@@ -4483,8 +4478,8 @@ if ((start_key->length= cache->get_next_key((uchar **) &start_key->key)))
range->ptr= (char *) cache->get_curr_key_chain(); range->ptr= (char *) cache->get_curr_key_chain();
range->range_flag= EQ_RANGE; range->range_flag= EQ_RANGE;
DBUG_RETURN(0); DBUG_RETURN(0);
} }
DBUG_RETURN(1); DBUG_RETURN(1);
} }
@@ -4513,13 +4508,12 @@ RETURN VALUE
*/ */
static static
bool bkah_range_seq_skip_record(range_seq_t rseq, range_id_t range_info, bool bkah_range_seq_skip_record(range_seq_t rseq, range_id_t range_info, uchar *rowid)
uchar *rowid)
{ {
DBUG_ENTER("bkah_range_seq_skip_record"); DBUG_ENTER("bkah_range_seq_skip_record");
JOIN_CACHE_BKAH *cache= (JOIN_CACHE_BKAH *) rseq; JOIN_CACHE_BKAH *cache= (JOIN_CACHE_BKAH *) rseq;
bool res= cache->check_all_match_flags_for_key((uchar *) range_info); bool res= cache->check_all_match_flags_for_key((uchar *) range_info);
DBUG_RETURN(res); DBUG_RETURN(res);
} }
@@ -4546,14 +4540,14 @@ RETURN VALUE
static static
bool bkah_skip_index_tuple(range_seq_t rseq, range_id_t range_info) bool bkah_skip_index_tuple(range_seq_t rseq, range_id_t range_info)
{ {
DBUG_ENTER("bka_unique_skip_index_tuple"); DBUG_ENTER("bka_unique_skip_index_tuple");
JOIN_CACHE_BKAH *cache= (JOIN_CACHE_BKAH *) rseq; JOIN_CACHE_BKAH *cache= (JOIN_CACHE_BKAH *) rseq;
THD *thd= cache->thd(); THD *thd= cache->thd();
bool res; bool res;
status_var_increment(thd->status_var.ha_icp_attempts); status_var_increment(thd->status_var.ha_icp_attempts);
if (!(res= cache->skip_index_tuple(range_info))) if (!(res= cache->skip_index_tuple(range_info)))
status_var_increment(thd->status_var.ha_icp_match); status_var_increment(thd->status_var.ha_icp_match);
DBUG_RETURN(res); DBUG_RETURN(res);
} }
@@ -4581,8 +4575,8 @@ RETURN VALUE
bool JOIN_CACHE_BKAH::prepare_look_for_matches(bool skip_last) bool JOIN_CACHE_BKAH::prepare_look_for_matches(bool skip_last)
{ {
last_matching_rec_ref_ptr= next_matching_rec_ref_ptr= 0; last_matching_rec_ref_ptr= next_matching_rec_ref_ptr= 0;
if (no_association && if (no_association &&
!(curr_matching_chain= get_matching_chain_by_join_key())) //psergey: added '!' !(curr_matching_chain= get_matching_chain_by_join_key())) //psergey: added '!'
return 1; return 1;
last_matching_rec_ref_ptr= get_next_rec_ref(curr_matching_chain); last_matching_rec_ref_ptr= get_next_rec_ref(curr_matching_chain);

9
sql/sql_select.cc
View File

@@ -10752,6 +10752,7 @@ uint check_join_cache_usage(JOIN_TAB *tab,
uint bufsz= 4096; uint bufsz= 4096;
JOIN_CACHE *prev_cache=0; JOIN_CACHE *prev_cache=0;
JOIN *join= tab->join; JOIN *join= tab->join;
MEM_ROOT *root= join->thd->mem_root;
uint cache_level= tab->used_join_cache_level; uint cache_level= tab->used_join_cache_level;
bool force_unlinked_cache= bool force_unlinked_cache=
!(join->allowed_join_cache_types & JOIN_CACHE_INCREMENTAL_BIT); !(join->allowed_join_cache_types & JOIN_CACHE_INCREMENTAL_BIT);
@@ -10871,7 +10872,7 @@ uint check_join_cache_usage(JOIN_TAB *tab,
case JT_ALL: case JT_ALL:
if (cache_level == 1) if (cache_level == 1)
prev_cache= 0; prev_cache= 0;
if ((tab->cache= new JOIN_CACHE_BNL(join, tab, prev_cache)) && if ((tab->cache= new (root) JOIN_CACHE_BNL(join, tab, prev_cache)) &&
!tab->cache->init(options & SELECT_DESCRIBE)) !tab->cache->init(options & SELECT_DESCRIBE))
{ {
tab->icp_other_tables_ok= FALSE; tab->icp_other_tables_ok= FALSE;
@@ -10906,7 +10907,7 @@ uint check_join_cache_usage(JOIN_TAB *tab,
goto no_join_cache; goto no_join_cache;
if (cache_level == 3) if (cache_level == 3)
prev_cache= 0; prev_cache= 0;
if ((tab->cache= new JOIN_CACHE_BNLH(join, tab, prev_cache)) && if ((tab->cache= new (root) JOIN_CACHE_BNLH(join, tab, prev_cache)) &&
!tab->cache->init(options & SELECT_DESCRIBE)) !tab->cache->init(options & SELECT_DESCRIBE))
{ {
tab->icp_other_tables_ok= FALSE; tab->icp_other_tables_ok= FALSE;
@@ -10927,7 +10928,7 @@ uint check_join_cache_usage(JOIN_TAB *tab,
{ {
if (cache_level == 5) if (cache_level == 5)
prev_cache= 0; prev_cache= 0;
if ((tab->cache= new JOIN_CACHE_BKA(join, tab, flags, prev_cache)) && if ((tab->cache= new (root) JOIN_CACHE_BKA(join, tab, flags, prev_cache)) &&
!tab->cache->init(options & SELECT_DESCRIBE)) !tab->cache->init(options & SELECT_DESCRIBE))
return (6 - MY_TEST(!prev_cache)); return (6 - MY_TEST(!prev_cache));
goto no_join_cache; goto no_join_cache;
@@ -10936,7 +10937,7 @@ uint check_join_cache_usage(JOIN_TAB *tab,
{ {
if (cache_level == 7) if (cache_level == 7)
prev_cache= 0; prev_cache= 0;
if ((tab->cache= new JOIN_CACHE_BKAH(join, tab, flags, prev_cache)) && if ((tab->cache= new (root) JOIN_CACHE_BKAH(join, tab, flags, prev_cache)) &&
!tab->cache->init(options & SELECT_DESCRIBE)) !tab->cache->init(options & SELECT_DESCRIBE))
{ {
tab->idx_cond_fact_out= FALSE; tab->idx_cond_fact_out= FALSE;