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其他函数

更新时间:2018-04-27 22:10:04

DRDS 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

不支持函数列表

Name Description
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