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PARTITION BY SYSTEM_TIME INTERVAL ...

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Lots of changes:
* calculate the current history partition in ::external_lock(),
  not in ::write_row() or ::update_row()
* remove dynamically collected per-partition row_end stats
* no full table scan in open_table_from_share to calculate these
  stats, no manual MDL/thr_locks in open_table_from_share
* no shared stats in TABLE_SHARE = no mutexes or condition waits when
  calculating current history partition
* always compare timestamps, don't convert them to MYSQL_TIME
  (avoid DST ambiguity, and it's faster too)
* correct interval handling, 1 month = 1 month, not 30 * 24 * 3600 seconds
* save/restore first partition start time, and count intervals from there
* only allow to drop first partitions if INTERVAL
* when adding new history partitions, split the data in the last history
  parition, if it was overflowed
* show partition boundaries in INFORMATION_SCHEMA.PARTITIONS
This commit is contained in:
Sergei Golubchik
2018-02-21 15:16:19 +01:00
parent 7961bc4b89
commit e36c5ec0a5
16 changed files with 463 additions and 974 deletions
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50
sql/table.cc
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@@ -425,9 +425,6 @@ void TABLE_SHARE::destroy()
DBUG_ENTER("TABLE_SHARE::destroy");
DBUG_PRINT("info", ("db: %s table: %s", db.str, table_name.str));
if (versioned)
vers_destroy();
if (ha_share)
{
delete ha_share;
@@ -1791,7 +1788,6 @@ int TABLE_SHARE::init_from_binary_frm_image(THD *thd, bool write,
DBUG_PRINT("info", ("Columns with system versioning: [%d, %d]", row_start, row_end));
versioned= VERS_TIMESTAMP;
vers_can_native= plugin_hton(se_plugin)->flags & HTON_NATIVE_SYS_VERSIONING;
vers_init();
row_start_field= row_start;
row_end_field= row_end;
} // if (system_period == NULL)
@@ -3522,38 +3518,6 @@ partititon_err:
if (share->no_replicate || !binlog_filter->db_ok(share->db.str))
share->can_do_row_logging= 0; // No row based replication
#ifdef WITH_PARTITION_STORAGE_ENGINE
if (outparam->part_info &&
outparam->part_info->part_type == VERSIONING_PARTITION)
{
Query_arena *backup_stmt_arena_ptr= thd->stmt_arena;
Query_arena backup_arena;
Query_arena part_func_arena(&outparam->mem_root,
Query_arena::STMT_INITIALIZED);
if (!work_part_info_used)
{
thd->set_n_backup_active_arena(&part_func_arena, &backup_arena);
thd->stmt_arena= &part_func_arena;
}
bool err= outparam->part_info->vers_setup_stats(thd, is_create_table);
if (!work_part_info_used)
{
thd->stmt_arena= backup_stmt_arena_ptr;
thd->restore_active_arena(&part_func_arena, &backup_arena);
}
if (err)
{
outparam->file->ha_close();
error= OPEN_FRM_OPEN_ERROR;
error_reported= true;
goto err;
}
}
#endif
/* Increment the opened_tables counter, only when open flags set. */
if (db_stat)
thd->status_var.opened_tables++;
@@ -8590,20 +8554,6 @@ LEX_CSTRING *fk_option_name(enum_fk_option opt)
return names + opt;
}
void TABLE_SHARE::vers_destroy()
{
mysql_mutex_destroy(&LOCK_rotation);
mysql_cond_destroy(&COND_rotation);
mysql_rwlock_destroy(&LOCK_stat_serial);
if (stat_trx)
{
for (Vers_min_max_stats** p= stat_trx; *p; ++p)
{
delete *p;
}
}
}
enum TR_table::enabled TR_table::use_transaction_registry= TR_table::MAYBE;
TR_table::TR_table(THD* _thd, bool rw) :