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https://dev.mysql.com/doc/refman/5.7/en/fulltext-natural-language.html
The second query performs a full table scan, which might be faster than the index lookup if the search term was present in most rows. MyISAM Limitation For very small tables, word distribution does not adequately reflect their semantic value, and ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-added-deprecated-removed-7-5.html
DiskCheckpointSpeedInRestart: Bytes allowed to be written by checkpoint during restart, per second. Parameters Introduced in NDB 7.5 The following node configuration parameters have been added in NDB 7.5. Parameters Deprecated in NDB 7.5 The ...
https://dev.mysql.com/doc/refman/5.7/en/option-defaults-equals.html
Options having default values always require an equal sign when assigning a value; failing to do so causes an error. For example, the MySQL server --log-error option has the default value host_name.err, where host_name is the name of the host on ...
https://dev.mysql.com/doc/refman/5.7/en/group-replication-requirements.html
Transactions are executed optimistically and then, at commit time, are checked for conflicts. The use of other storage engines, including the temporary MEMORY storage engine, might cause errors in Group Replication. Bi-directional communication must ... Server instances that you want to use for Group Replication must satisfy the following ...
https://dev.mysql.com/doc/refman/5.7/en/spatial-operator-functions.html
If any geometry argument is not a syntactically well-formed geometry, an ER_GIS_INVALID_DATA error occurs. An ER_WRONG_ARGUMENTS error occurs for ST_Buffer() with a negative distance for Point, MultiPoint, LineString, and MultiLineString values, and ... OpenGIS proposes a number of functions that can produce ...
https://dev.mysql.com/doc/refman/5.7/en/precision-math-examples.html
Consider the following stored procedure, which adds .0001 to a variable 1,000 times. The floating-point calculation introduces small errors: +--------+------------------+ | d | f | +--------+------------------+ | 1.0000 | 0.99999999999991 | ... This ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-disk-data-objects.html
Important There can exist at most one log file group in the same NDB Cluster at any given time. You cannot add an index to a column that has been explicitly declared STORAGE DISK, without first changing its storage type to MEMORY; any attempt to do ... NDB Cluster Disk Data storage is implemented using a number of Disk Data ...
https://dev.mysql.com/doc/refman/5.7/en/merge-table-problems.html
If there is a difference between the tables, an error is returned and the statement fails. If you encounter an error message similar to ERROR 1017 (HY000): Can't find file: 'tbl_name.MRG' (errno: 2), it generally indicates that some of the ... The ...
https://dev.mysql.com/doc/refman/5.7/en/spatial-geojson-functions.html
If not specified, this argument defaults to its maximum value of 232 − 1. Option Value Meaning 1 Reject the document and produce an error. If an object has a CRS that is not understood, an error occurs, with the exception that if the optional srid ... This section describes functions for converting between GeoJSON documents and spatial ...
https://dev.mysql.com/doc/refman/5.7/en/xml-functions.html
No warnings or errors are issued by the server if a variable has the wrong type or has previously not been assigned a value. This also means the user is fully responsible for any typographical errors, since no warnings are given if (for example) ...