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https://dev.mysql.com/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/innodb-ft-index-table-table.html
The INNODB_FT_INDEX_TABLE table provides information about the inverted index used to process text searches against the FULLTEXT index of an InnoDB table. Before querying it, set the value of the innodb_ft_aux_table system variable to the name ...
https://dev.mysql.com/innodb-information-schema-fulltext_index-tables.html
INNODB_FT_BEING_DELETED: Provides a snapshot of the INNODB_FT_DELETED table; it is used only during an OPTIMIZE TABLE maintenance operation. innodb_optimize_fulltext_only changes the way the OPTIMIZE TABLE statement operates on InnoDB tables, and is ...When OPTIMIZE TABLE is run, the INNODB_FT_BEING_DELETED table is emptied, and DOC_ID values are removed from the INNODB_FT_DELETED ...
https://dev.mysql.com/innodb-information-schema-metrics-table.html
Create a simple InnoDB table: mysql> USE test; Database changed mysql> CREATE TABLE t1 (c1 INT) ENGINE=INNODB; Query OK, 0 rows affected (0.02 sec) Enable the dml_inserts counter. row *************************** NAME: dml_inserts SUBSYSTEM: dml ...
https://dev.mysql.com/innodb-locking-reads.html
You traverse edges or tree branches from one place to another, while reserving the right to come back and change any of these “pointer” values. Your application code can ensure referential integrity throughout this sequence of operations. For ...
https://dev.mysql.com/innodb-locking.html
Shared and Exclusive Locks Intention Locks Record Locks Gap Locks Next-Key Locks Insert Intention Locks AUTO-INC Locks Predicate Locks for Spatial Indexes InnoDB implements standard row-level locking where there are two types of locks, shared (S) ...
https://dev.mysql.com/innodb-locks-set.html
The locks are normally next-key locks that also block inserts into the “gap” immediately before the record. For example, in a UNION, scanned (and locked) rows from a table might be inserted into a temporary table before evaluation whether they ... A locking read, an UPDATE, or a DELETE generally set record locks on every index record that is scanned in the processing of the SQL ...
https://dev.mysql.com/innodb-temp-table-info-table.html
It does not provide information about internal InnoDB temporary tables used by the optimizer. Example mysql> CREATE TEMPORARY TABLE t1 (c1 INT PRIMARY KEY) ENGINE=INNODB; mysql> SELECT * FROM INFORMATION_SCHEMA.INNODB_TEMP_TABLE_INFO\G ... The ...
https://dev.mysql.com/json-attribute-functions.html
The functions in this section return attributes of JSON values. An error occurs if the argument is not a valid JSON document. An empty array, empty object, or scalar value has depth 1. A nonempty array containing only elements of depth 1 or ...
https://dev.mysql.com/json.html
JSON documents stored in JSON columns are converted to an internal format that permits quick read access to document elements. The JSON_TYPE() function expects a JSON argument and attempts to parse it into a JSON value. One way to insert this as a ...The JSON data type provides these advantages over storing JSON-format strings in a string column: Automatic validation of JSON documents stored in JSON ...
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