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https://dev.mysql.com/doc/refman/5.7/en/information-schema-partitions-table.html
SUBPARTITION_NAME If the PARTITIONS table row represents a subpartition, the name of subpartition; otherwise NULL. For tables using other storage engines and which are not partitioned, this column is NULL. For partitions whose PARTITION_METHOD is ...
https://dev.mysql.com/doc/refman/5.7/en/date-and-time-functions.html
For example: mysql> SELECT DAYOFMONTH('2001-11-00'), MONTH('2005-00-00'); -> 0, 0 Other functions expect complete dates and return NULL for incomplete dates. For example: mysql> SELECT DATE_ADD('2006-05-00',INTERVAL 1 DAY); -> NULL mysql> SELECT ...
https://dev.mysql.com/doc/refman/5.7/en/diagnostics-area.html
If a statement or condition item is not set by a statement that populates the diagnostics area, its value is 0 or the empty string, depending on the item data type. RETURNED_SQLSTATE: A string that indicates the SQLSTATE value for the condition.
https://dev.mysql.com/doc/refman/5.7/en/partitioning-selection.html
MySQL 5.7 supports explicit selection of partitions and subpartitions that, when executing a statement, should be checked for rows matching a given WHERE condition. Partition selection is similar to partition pruning, in that only specific ...
https://dev.mysql.com/doc/refman/5.7/en/gis-class-geometry.html
Geometry values of types (LineString, MultiPoint, MultiLineString) are either simple or nonsimple. Geometry values of types (LineString, MultiString) are either closed or not closed. Exterior, interior, and boundary of an empty geometry are not ...
https://dev.mysql.com/doc/refman/5.7/en/json-creation-functions.html
mysql> SELECT JSON_ARRAY(1, "abc", NULL, TRUE, CURTIME()); +---------------------------------------------+ | JSON_ARRAY(1, "abc", NULL, TRUE, CURTIME()) | +---------------------------------------------+ | [1, "abc", null, true, "11:30:24.000000"] | ... The functions listed in this section compose JSON values from component ...
https://dev.mysql.com/doc/refman/5.7/en/pattern-matching.html
MySQL provides standard SQL pattern matching as well as a form of pattern matching based on extended regular expressions similar to those used by Unix utilities such as vi, grep, and sed. SQL pattern matching enables you to use _ to match any ...
https://dev.mysql.com/doc/refman/5.7/en/miscellaneous-functions.html
Given this statement: CREATE TABLE t AS SELECT INET6_NTOA(expr) AS c1; The resulting table would have this definition: CREATE TABLE t (c1 VARCHAR(39) CHARACTER SET utf8 DEFAULT NULL); The return string uses lowercase letters for IPv6 addresses. The ...
https://dev.mysql.com/doc/refman/5.7/en/gis-general-property-functions.html
ST_GeometryType(g) Returns a binary string indicating the name of the geometry type of which the geometry instance g is a member, or NULL if the argument is NULL. ST_Dimension(g) Returns the inherent dimension of the geometry value g, or NULL if the ... The functions listed in this section do not restrict their argument and accept a geometry value of any ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-online-operations.html
This does not perform any defragmentation, which requires an OPTIMIZE TABLE or null ALTER TABLE statement. The columns must permit NULL values and not have any explicit default value other than NULL. row *************************** Table: t1 Create ... MySQL NDB Cluster 7.5 and 7.6 support online table schema changes using ALTER TABLE ...