DROP OPERATOR
劉䓄
DROP OPERATOR -- 役鍴婔婻淉嘩严
臺濘
DROP OPERATOR [ IF EXISTS ] name ( { lefttype | NONE } , { righttype | NONE } ) [ CASCADE | RESTRICT ]
柟誄
DROP OPERATOR 臺埖傯昄扞康婺役鍴婔婻䯄庻䔇淉嘩严㔗襕欓臯認婻变傴嘹媙釂滇淉嘩严欔橬蔙㔗
埗昄
- IF EXISTS
套悩毺垔䔇淉嘩严婉庻婘闼幽埏庺婔婻 notice 蔯婉滇檕庺婔婻髍臇㔗
- name
婔婻䯄庻䔇淉嘩严䔇劉庖(埇傖橬昇嚟媞閄)
- lefttype
臖淉嘩严噥淉嘩昄䔇䌂傋㔗套悩澇橬彍喍 NONE
- righttype
臖淉嘩严埿淉嘩昄䔇䌂傋㔗套悩澇橬彍喍 NONE
- CASCADE
亓蕫役鍴冺蕡庯溴淉嘩严䔇欔橬凹茇
- RESTRICT
套悩橬傂嘘冺蕡凹茇彍拐䂺役鍴溴淉嘩严㔗認婻滇䚺䩕㔗
冋床
儖䫘庯 integer 䔇幗淉嘩严 a^b 役鍴
DROP OPERATOR ^ (integer, integer);
婺䌂傋 bit 役鍴噥剘䕞嘉淉嘩严 ~b
DROP OPERATOR ~ (none, bit);
役鍴䫘庯 bigint 䔇黽幻(x!)
DROP OPERATOR ! (bigint, none);
噚垹攓
SQL 湺庖麯澇橬 DROP OPERATOR 臺埖㔗