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Automerge.

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This commit is contained in:
Alexey Kopytov 2010-08-26 14:19:04 +04:00
commit 5012ce8df3
3 changed files with 71 additions and 0 deletions
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16
storage/innobase/include/dict0dict.h
View File

@ -588,6 +588,22 @@ dict_table_is_comp_noninline(
/* out: TRUE if table uses the
compact page format */
const dict_table_t* table); /* in: table */
/*********************************************************************//**
Obtain exclusive locks on all index trees of the table. This is to prevent
accessing index trees while InnoDB is updating internal metadata for
operations such as truncate tables. */
UNIV_INLINE
void
dict_table_x_lock_indexes(
/*======================*/
dict_table_t* table); /* in: table */
/*********************************************************************//**
Release the exclusive locks on all index tree. */
UNIV_INLINE
void
dict_table_x_unlock_indexes(
/*========================*/
dict_table_t* table); /* in: table */
/************************************************************************
Checks if a column is in the ordering columns of the clustered index of a
table. Column prefixes are treated like whole columns. */

42
storage/innobase/include/dict0dict.ic
View File

@ -298,6 +298,48 @@ dict_table_is_comp(
return(UNIV_LIKELY(table->flags & DICT_TF_COMPACT));
}
/*********************************************************************//**
Obtain exclusive locks on all index trees of the table. This is to prevent
accessing index trees while InnoDB is updating internal metadata for
operations such as truncate tables. */
UNIV_INLINE
void
dict_table_x_lock_indexes(
/*======================*/
dict_table_t* table) /* in: table */
{
dict_index_t* index;
ut_a(table);
ut_ad(mutex_own(&(dict_sys->mutex)));
/* Loop through each index of the table and lock them */
for (index = dict_table_get_first_index(table);
index != NULL;
index = dict_table_get_next_index(index)) {
rw_lock_x_lock(dict_index_get_lock(index));
}
}
/*********************************************************************//**
Release the exclusive locks on all index tree. */
UNIV_INLINE
void
dict_table_x_unlock_indexes(
/*========================*/
dict_table_t* table) /* in: table */
{
dict_index_t* index;
ut_a(table);
ut_ad(mutex_own(&(dict_sys->mutex)));
for (index = dict_table_get_first_index(table);
index != NULL;
index = dict_table_get_next_index(index)) {
rw_lock_x_unlock(dict_index_get_lock(index));
}
}
/************************************************************************
Gets the number of fields in the internal representation of an index,
including fields added by the dictionary system. */

13
storage/innobase/row/row0mysql.c
View File

@ -2830,6 +2830,15 @@ row_truncate_table_for_mysql(
trx->table_id = table->id;
/* Lock all index trees for this table, as we will
truncate the table/index and possibly change their metadata.
All DML/DDL are blocked by table level lock, with
a few exceptions such as queries into information schema
about the table, MySQL could try to access index stats
for this kind of query, we need to use index locks to
sync up */
dict_table_x_lock_indexes(table);
/* scan SYS_INDEXES for all indexes of the table */
heap = mem_heap_create(800);
@ -2902,6 +2911,10 @@ next_rec:
mem_heap_free(heap);
/* Done with index truncation, release index tree locks,
subsequent work relates to table level metadata change */
dict_table_x_unlock_indexes(table);
new_id = dict_hdr_get_new_id(DICT_HDR_TABLE_ID);
info = pars_info_create();