Marko Mäkelä ea37b14409 MDEV-16678 Prefer MDL to dict_sys.latch for innodb background tasks ... This is joint work with Thirunarayanan Balathandayuthapani. The MDL interface between InnoDB and the rest of the server (in storage/innobase/dict/dict0dict.cc and in include/) is my work, while most everything else is Thiru's. The collection of InnoDB persistent statistics and the defragmentation were not refactored to use MDL. They will keep relying on lower-level interlocking with fil_check_pending_operations(). The purge of transaction history and the background operations on fulltext indexes will use MDL. We will revert commit 2c4844c9e7 (MDEV-17813) because thanks to MDL, purge cannot conflict with DDL operations anymore. For a similar reason, we will remove the MDEV-16222 test case from gcol.innodb_virtual_debug_purge. Purge is essentially replacing all use of the global dict_sys.latch with MDL. Purge will skip the undo log records for tables whose names start with #sql-ib or #sql2. Theoretically, such tables might be renamed back to visible table names if TRUNCATE fails to create a new table, or the final rename in ALTER TABLE...ALGORITHM=COPY fails. In that case, purge could permanently leave some garbage in the table. Such garbage will be tolerated; the table would not be considered corrupted. To avoid repeated MDL releases and acquisitions, trx_purge_attach_undo_recs() will sort undo log records by table_id, and purge_node_t will keep the MDL and table handle open for multiple successive undo log records. get_purge_table(): A new accessor, used during the purge of history for indexed virtual columns. This interface should ideally not exist at all. thd_mdl_context(): Accessor of THD::mdl_context. Wrapped in a new thd_mdl_service. dict_get_db_name_len(): Define inline. dict_acquire_mdl_shared(): Acquire explicit shared MDL on a table name if needed. dict_table_open_on_id(): Return MDL_ticket, if requested. dict_table_close(): Release MDL ticket, if requested. dict_fts_index_syncing(), dict_index_t::index_fts_syncing: Remove. row_drop_table_for_mysql() no longer needs to check these, because MDL guarantees that a fulltext index sync will not be in progress while MDL_EXCLUSIVE is protecting a DDL operation. dict_table_t::parse_name(): Parse the table name for acquiring MDL. purge_node_t::undo_recs: Change the type to std::list<trx_purge_rec_t*> (different container, and storing also roll_ptr). purge_node_t: Add mdl_ticket, last_table_id, purge_thd, mdl_hold_recs for acquiring MDL and for keeping the table open across multiple undo log records. purge_vcol_info_t, row_purge_store_vsec_cur(), row_purge_restore_vsec_cur(): Remove. We will acquire the MDL earlier. purge_sys_t::heap: Added, for reading undo log records. fts_sync_during_ddl(): Invoked during ALGORITHM=INPLACE operations to ensure that fts_sync_table() will not conflict with MDL_EXCLUSIVE. Uses fts_t::sync_message for bookkeeping.		2019-12-10 15:42:50 +02:00
..
psi
auth_dialog_client.h
client_plugin.h
client_plugin.h.pp
plugin.h	Part2: MDEV-20837 Add MariaDB_FUNCTION_PLUGIN	2019-10-16 21:47:41 +04:00
plugin_audit.h
plugin_audit.h.pp	Adding -D__cplusplus into the ABI check command line	2019-07-11 16:45:18 +04:00
plugin_auth.h
plugin_auth.h.pp	Adding -D__cplusplus into the ABI check command line	2019-07-11 16:45:18 +04:00
plugin_auth_common.h
plugin_data_type.h	cleanup: data type plugins	2019-10-31 11:19:39 +01:00
plugin_data_type.h.pp	cleanup: data type plugins	2019-10-31 11:19:39 +01:00
plugin_encryption.h
plugin_encryption.h.pp	Adding -D__cplusplus into the ABI check command line	2019-07-11 16:45:18 +04:00
plugin_ftparser.h
plugin_ftparser.h.pp	Adding -D__cplusplus into the ABI check command line	2019-07-11 16:45:18 +04:00
plugin_function.h	Part1: MDEV-20837 Add MariaDB_FUNCTION_PLUGIN	2019-10-16 21:40:30 +04:00
plugin_function.h.pp	Part1: MDEV-20837 Add MariaDB_FUNCTION_PLUGIN	2019-10-16 21:40:30 +04:00
plugin_password_validation.h
plugin_password_validation.h.pp	Adding -D__cplusplus into the ABI check command line	2019-07-11 16:45:18 +04:00
service_base64.h
service_debug_sync.h
service_encryption.h
service_encryption_scheme.h
service_json.h
service_kill_statement.h
service_logger.h
service_md5.h
service_my_crypt.h	MDEV-19684 enable intel assembly (AESNI etc) and fastmath when compiling WolfSSL	2019-06-04 10:07:39 +02:00
service_my_print_error.h	remove incorrect #ifdef	2019-08-26 23:33:42 +02:00
service_my_snprintf.h
service_progress_report.h
service_sha1.h
service_sha2.h
service_thd_alloc.h
service_thd_autoinc.h
service_thd_error_context.h
service_thd_mdl.h	MDEV-16678 Prefer MDL to dict_sys.latch for innodb background tasks	2019-12-10 15:42:50 +02:00
service_thd_rnd.h
service_thd_specifics.h
service_thd_timezone.h
service_thd_wait.h
service_wsrep.h	MDEV-17048 Inconsistency voting support (#1373)	2019-08-28 09:19:24 +03:00
services.h