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https://dev.mysql.com/doc/refman/5.7/en/handler.html
] HANDLER tbl_name CLOSE The HANDLER statement provides direct access to table storage engine interfaces. OPEN statement opens a table, making it accessible using subsequent HANDLER ... This table object is not shared by other sessions and is not ...
https://dev.mysql.com/doc/refman/5.7/en/identifier-case-sensitivity.html
Each table within a database corresponds to at least one file within the database directory (and possibly more, depending on the storage engine). Consequently, the case sensitivity of the underlying operating system plays a part in the case ... In ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-information-schema-examples.html
The tables that contain information about InnoDB transactions and data locks enable you to determine which transaction is waiting for another, and which resource is being requested. (For descriptions of these tables, see Section 14.16.2, “InnoDB ... Identifying Blocking Transactions It is sometimes helpful to identify which transaction blocks ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-object-filtering.html
The setup_objects table controls whether the Performance Schema monitors particular table and stored program objects. TABLE filtering affects table I/O events (wait/io/table/sql/handler instrument) and table lock events (wait/lock/table/sql/handler ...The OBJECT_TYPE column indicates the type of object to which a row ...
https://dev.mysql.com/doc/refman/5.7/en/replication-gtids-concepts.html
The MySQL system table mysql.gtid_executed is used to preserve the assigned GTIDs of all the transactions applied on a MySQL server, except those that are stored in a currently active binary log file. The GTID for a transaction is shown in the ... A ...
https://dev.mysql.com/doc/refman/5.7/en/partitioning-selection.html
This option always follows the name of the table to which the partition or partitions belong. Each name in this list must be the name of an existing partition or subpartition of the specified table; if any of the partitions or subpartitions are not ... MySQL 5.7 supports explicit selection of partitions and subpartitions that, when executing a statement, should be checked for rows matching a given WHERE ...
https://dev.mysql.com/doc/refman/5.7/en/storage-requirements.html
For more information, see Chapter 15, Alternative Storage Engines, and Section 8.4.7, “Limits on Table Column Count and Row Size”. You can increase the size of an NDB blob column's blob part to the maximum of 13948 using NDB_COLUMN in a column ... InnoDB Table Storage Requirements NDB Table Storage Requirements Numeric Type Storage Requirements Date and Time Type Storage Requirements String Type Storage Requirements Spatial Type Storage Requirements JSON Storage Requirements The storage requirements for table data on disk depend on several ...
https://dev.mysql.com/doc/refman/5.7/en/information-schema-innodb-ft-index-cache-table.html
The INNODB_FT_INDEX_CACHE table provides token information about newly inserted rows in a FULLTEXT index. Before querying it, set the value of the innodb_ft_aux_table system variable to the name (including the database name) of the table that ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-information-schema-metrics-table.html
The INNODB_METRICS table provides information about InnoDB performance and resource-related counters. For example, to enable the log module, metadata_table_handles_opened and metadata_table_handles_closed counters, enter the following line in the ...SET GLOBAL innodb_monitor_disable = [counter-name|module_name|pattern|all]; innodb_monitor_reset: Resets counter values to ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-truncate-table-reclaim-space.html
To reclaim operating system disk space when truncating an InnoDB table, the table must be stored in its own .ibd file. For a table to be stored in its own .ibd file, innodb_file_per_table must enabled when the table is created. Additionally, there ...