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https://dev.mysql.com/doc/refman/5.7/en/known-issues.html
SELECT statements that insert zero or NULL values into an AUTO_INCREMENT column. This section lists known issues in recent versions of MySQL. For information about platform-specific issues, see the installation and debugging instructions in Section ...
https://dev.mysql.com/doc/refman/5.7/en/replication-features-differing-tables.html
A column's default value is determined by a number of factors, including its type, whether it is defined with a DEFAULT option, whether it is declared as NULL, and the server SQL mode in effect at the time of its creation; for more information, see ... Source and target tables for replication do not have to be ...
https://dev.mysql.com/doc/refman/5.7/en/gis-format-conversion-functions.html
MySQL supports the functions listed in this section for converting geometry values from internal geometry format to WKT or WKB format. There are also functions to convert a string from WKT or WKB format to internal geometry format. See Section ...
https://dev.mysql.com/doc/refman/5.7/en/create-procedure.html
Its initial value is NULL within the procedure, and its value is visible to the caller when the procedure returns. By default, a stored routine is associated with the default database. To associate the routine explicitly with a given database, ...
https://dev.mysql.com/doc/refman/5.7/en/data-size.html
It makes SQL operations faster, by enabling better use of indexes and eliminating overhead for testing whether each value is NULL. If you really need NULL values in your tables, use them. Just avoid the default setting that allows NULL values in ...
https://dev.mysql.com/doc/refman/5.7/en/fulltext-stopwords.html
The stopword list is loaded and searched for full-text queries using the server character set and collation (the values of the character_set_server and collation_server system variables). False hits or misses might occur for stopword lookups if the ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-host-cache-table.html
HOST The resolved DNS host name for that client IP, or NULL if the name is unknown. The MySQL server maintains an in-memory host cache that contains client host name and IP address information and is used to avoid Domain Name System (DNS) lookups.
https://dev.mysql.com/doc/refman/5.7/en/start-slave.html
The option cannot be set to an empty or null string. START SLAVE [thread_types] [until_option] [connection_options] [channel_option] thread_types: [thread_type [, thread_type] ... ] thread_type: IO_THREAD | SQL_THREAD until_option: UNTIL { ...
https://dev.mysql.com/doc/refman/5.7/en/alter-table-partition-operations.html
Attempting to use REORGANIZE PARTITION without the partition_names INTO (partition_definitions) option on explicitly partitioned tables results in the error REORGANIZE PARTITION without parameters can only be used on auto-partitioned tables using ...
https://dev.mysql.com/doc/refman/5.7/en/charset-unicode-conversion.html
This section describes issues that you may face when converting character data between the utf8mb3 and utf8mb4 character sets. Note This discussion focuses primarily on converting between utf8mb3 and utf8mb4, but similar principles apply to ...