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https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-replication-schema.html
Note When performing schema changes on NDB tables, applications should wait until the ALTER TABLE statement has returned in the MySQL client connection that issued the statement before attempting to use the updated definition of the table.
https://dev.mysql.com/doc/refman/5.7/en/subquery-optimization-with-exists.html
This section discusses these optimizations, particularly with regard to the challenges that NULL values present. That is, the “pushdown” strategy works as long as both of these conditions are true: outer_expr and inner_expr cannot be NULL.
https://dev.mysql.com/doc/refman/5.7/en/gis-linestring-property-functions.html
You can extract particular points of a LineString, count the number of points that it contains, or obtain its length. (There is an existing SQL function Length() that calculates the length of string values.) GLength() is deprecated; expect it to be ...EndPoint() is deprecated; expect it to be removed in a future MySQL ...
https://dev.mysql.com/doc/refman/5.7/en/encryption-functions.html
Note If you are using a KDF, you must specify an initialization vector or a null string for this argument, in order to access the later arguments to define the KDF. When you specify kdf_name, you must specify init_vector, using either a valid ...If ...N is 16 for an MD5() value and 20 for a SHA1() ...
https://dev.mysql.com/doc/refman/5.7/en/partitioning-range.html
A table that is partitioned by range is partitioned in such a way that each partition contains rows for which the partitioning expression value lies within a given range. Ranges should be contiguous but not overlapping, and are defined using the ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-information-schema-fulltext_index-tables.html
When OPTIMIZE TABLE is run, the INNODB_FT_BEING_DELETED table is emptied, and DOC_ID values are removed from the INNODB_FT_DELETED table. INNODB_FT_BEING_DELETED: Provides a snapshot of the INNODB_FT_DELETED table; it is used only during an OPTIMIZE ...
https://dev.mysql.com/doc/refman/5.7/en/mysqldump.html
NULL, 'NULL', and Empty Values: For a column named column_name, the NULL value, an empty string, and the string value 'NULL' are distinguished from one another in the output generated by this option as follows. Value: XML Representation: NULL ...
https://dev.mysql.com/doc/refman/5.7/en/json-modification-functions.html
All members of the second object which do not have a corresponding key in the first object, and whose value is not the JSON null literal. All members with a key that exists in both the first and the second object, and whose value in the second ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-programs-ndb-desc.html
Usage ndb_desc -c connection_string tbl_name -d db_name [options] ndb_desc -c connection_string index_name -d db_name -t tbl_name Additional options that can be used with ndb_desc are listed later in this section. --connect-string Command-Line ...
https://dev.mysql.com/doc/refman/5.7/en/sql-mode.html
To clear the SQL mode explicitly, set it to an empty string using --sql-mode="" on the command line, or sql-mode="" in an option file. ANSI_QUOTES Treat " as an identifier quote character (like the ` quote character) and not as a string quote ...