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https://dev.mysql.com/doc/ndbapi/en/ndb-ndbscanfilter.html
Description This type represents a condition based on the comparison of a column value with some arbitrary value—that is, a bound condition. When used in comparisons with COND_EQ, COND_NE, COND_LT, COND_LE, COND_GT, or COND_GE, fixed-length ...
https://dev.mysql.com/doc/refman/8.4/en/json-table-functions.html
JSON_TABLE(expr, path COLUMNS (column_list) [AS] alias) Extracts data from a JSON document and returns it as a relational table having the specified columns. This can be a constant ('{"a":1}'), a column (t1.json_data, given table t1 specified prior ... This section contains information about JSON functions that convert JSON data to tabular ...
https://dev.mysql.com/doc/refman/8.4/en/load-data.html
Unless REPLACE is also specified, LOCAL has the same effect as the IGNORE modifier on the interpretation of input file contents and error handling; see Duplicate-Key and Error Handling, and Column Value Assignment. LOAD DATA interprets all fields in ...The file can be read from the server host or the client host, depending on whether the LOCAL modifier is ...
https://dev.mysql.com/doc/refman/8.4/en/known-issues.html
DISTINCT with ORDER BY does not work inside GROUP_CONCAT() if you do not use all and only those columns that are in the DISTINCT list. When inserting a big integer value (between 263 and 264−1) into a decimal or string column, it is inserted as a ... This section lists known issues in recent versions of ...
https://dev.mysql.com/doc/refman/8.4/en/replication-features-auto-increment.html
Regardless of the method used to create and populate the copy having the AUTO_INCREMENT column, the final step is to drop the original table and then rename the copy: DROP t1; ALTER TABLE t2 RENAME t1; See also Section B.3.6.1, “Problems with ...
https://dev.mysql.com/doc/refman/8.4/en/performance-schema-table-wait-summary-tables.html
The table_io_waits_summary_by_table table has these grouping columns to indicate how the table aggregates events: OBJECT_TYPE, OBJECT_SCHEMA, and OBJECT_NAME. These columns have the same meaning as in the events_waits_current table. As indicated in ... The following sections describe the table I/O and lock wait summary tables: table_io_waits_summary_by_index_usage: Table I/O waits per index table_io_waits_summary_by_table: Table I/O waits per table table_lock_waits_summary_by_table: Table lock waits per table 29.12.20.8.1 The table_io_waits_summary_by_table Table The table_io_waits_summary_by_table table aggregates all table I/O wait events, as generated by the wait/io/table/sql/handler ...
https://dev.mysql.com/doc/refman/8.4/en/timestamp-initialization.html
TIMESTAMP and DATETIME columns can be automatically initialized and updated to the current date and time (that is, the current timestamp). For any TIMESTAMP or DATETIME column in a table, you can assign the current timestamp as the default value, ...Any of the synonyms for CURRENT_TIMESTAMP have the same meaning as ...
https://dev.mysql.com/doc/refman/8.4/en/json.html
The JSON data type provides these advantages over storing JSON-format strings in a string column: Automatic validation of JSON documents stored in JSON columns. JSON documents stored in JSON columns are converted to an internal format that permits ...When the server later must read a JSON value stored in this binary format, the value need not be parsed from a text ...
https://dev.mysql.com/doc/refman/8.4/en/storage-requirements.html
Table data might be compressed, either for a column or an entire row, complicating the calculation of storage requirements for a table or column. This figure excludes BLOB or TEXT columns, which contribute only 9 to 12 bytes toward this size. For ...
https://dev.mysql.com/doc/refman/8.4/en/upgrade-prerequisites.html
There must be no views with explicitly defined columns names that exceed 64 characters (views with column names up to 255 characters were permitted in MySQL 5.7). Currently, the only method of identify views with column names that exceed 64 ...