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https://dev.mysql.com/doc/heatwave-aws/en/heatwave-aws-refreshing-lakehouse-data.html
Refreshing Lakehouse Data 9.3 Refreshing Lakehouse Data The MySQL HeatWave Lakehouse tables contain a snapshot of your data in Amazon S3 at the time you loaded the data into your MySQL HeatWave Cluster. If the data has been altered or removed ...In ...
https://dev.mysql.com/doc/refman/8.4/en/added-deprecated-removed.html
Deprecated_use_i_s_processlist_count: Number of times Information Schema processlist table has been accessed. Deprecated_use_i_s_processlist_last_timestamp: Time of most recent access to Information Schema processlist table (timestamp). Options and ...
https://dev.mysql.com/doc/refman/8.4/en/binary-log.html
The binary log contains “events” that describe database changes such as table creation operations or changes to table data. Updates to nontransactional tables are stored in the binary log immediately after execution. Within an uncommitted ...It ...
https://dev.mysql.com/doc/refman/8.4/en/charset-column.html
CREATE TABLE t1 ( col1 CHAR(10) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci ) CHARACTER SET latin1 COLLATE latin1_bin; The character set and collation are specified for the column, so they are used. CREATE TABLE t1 ( col1 CHAR(10) CHARACTER SET ... Every “character” column (that is, a column of type CHAR, VARCHAR, a TEXT type, or any synonym) has a column character set and a column ...
https://dev.mysql.com/doc/refman/8.4/en/create-event.html
This is an example of a minimal CREATE EVENT statement: CREATE EVENT myevent ON SCHEDULE AT CURRENT_TIMESTAMP + INTERVAL 1 HOUR DO UPDATE myschema.mytable SET mycol = mycol + 1; The previous statement creates an event named myevent. This event ...
https://dev.mysql.com/doc/refman/8.4/en/data-directory-initialization.html
After MySQL is installed, the data directory must be initialized, including the tables in the mysql system schema: For some MySQL installation methods, data directory initialization is automatic, as described in Section 2.9, “Postinstallation ...
https://dev.mysql.com/doc/refman/8.4/en/function-optimization.html
If a function is tagged nondeterministic, a reference to it in a WHERE clause is evaluated for every row (when selecting from one table) or combination of rows (when selecting from a multiple-table join). MySQL also determines when to evaluate ...A ...
https://dev.mysql.com/doc/refman/8.4/en/ibd2sdi.html
ibd2sdi is a utility for extracting serialized dictionary information (SDI) from InnoDB tablespace files. ibd2sdi can be run on file-per-table tablespace files (*.ibd files), general tablespace files (*.ibd files), system tablespace files (ibdata* ...ibd2sdi can be used at runtime or while the server is ...
https://dev.mysql.com/doc/refman/8.4/en/mysql-indexes.html
Without an index, MySQL must begin with the first row and then read through the entire table to find the relevant rows. If the table has an index for the columns in question, MySQL can quickly determine the position to seek to in the middle of the ... Indexes are used to find rows with specific column values ...
https://dev.mysql.com/doc/refman/8.4/en/partitioning.html
Note Table partitioning differs from partitioning as used by window functions. MySQL 8.4 does not currently support partitioning of tables using any storage engine other than InnoDB or NDB, such as MyISAM. An attempt to create a partitioned tables ...In MySQL 8.4, partitioning support is provided by the InnoDB and NDB storage ...