本文介绍了PolarDB-X 1.0支持的其他函数。
PolarDB-X 1.0还支持如下函数:
函数名 | 描述 |
---|---|
RAND() | Return a random floating-point value |
RELEASE_ALL_LOCKS() | Releases all current named locks |
RELEASE_LOCK() | Releases the named lock |
SLEEP() | Sleep for a number of seconds |
UUID() | Return a Universal Unique Identifier (UUID) |
UUID_SHORT() | Return an integer-valued universal identifier |
VALUES() | Defines the values to be used during an INSERT |
ANY_VALUE() | Suppress ONLY_FULL_GROUP_BY value rejection |
DEFAULT() | Return the default value for a table column |
GET_LOCK() | Get a named lock |
INET_ATON() | Return the numeric value of an IP address |
INET_NTOA() | Return the IP address from a numeric value |
INET6_ATON() | Return the numeric value of an IPv6 address |
INET6_NTOA() | Return the IPv6 address from a numeric value |
IS_FREE_LOCK() | Whether the named lock is free |
IS_IPV4() | Whether argument is an IPv4 address |
IS_IPV4_COMPAT() | Whether argument is an IPv4-compatible address |
IS_IPV4_MAPPED() | Whether argument is an IPv4-mapped address |
IS_IPV6() | Whether argument is an IPv6 address |
IS_USED_LOCK() | Whether the named lock is in use; return connection identifier if true |
MASTER_POS_WAIT() | Block until the slave has read and applied all updates up to the specified position |
NAME_CONST() | Causes the column to have the given name |