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DROP INDEX 中文man頁(yè)面

系統(tǒng)
DROP INDEX 從數(shù)據(jù)庫(kù)中刪除一個(gè)現(xiàn)存的索引。 要執(zhí)行這個(gè)命令,你必須是索引的所有者。

NAME

DROP INDEX - 刪除一個(gè)索引

SYNOPSIS

DROP INDEX name [, ...] [ CASCADE | RESTRICT ]

DESCRIPTION 描述

DROP INDEX 從數(shù)據(jù)庫(kù)中刪除一個(gè)現(xiàn)存的索引。 要執(zhí)行這個(gè)命令,你必須是索引的所有者。  

PARAMETERS 參數(shù)

name

 要?jiǎng)h除的索引名(可以有模式修飾)。
CASCADE

 自動(dòng)刪除依賴于該索引的對(duì)象。
RESTRICT

 如果有依賴對(duì)象存在,則拒絕刪除該索引。這個(gè)是缺省。

EXAMPLES 例子


 此命令將刪除title_idx 索引:

DROP INDEX title_idx;

COMPATIBILITY 兼容性

DROP INDEX 是 PostgreSQL 語(yǔ)言擴(kuò)展。 在 SQL 標(biāo)準(zhǔn)里沒(méi)有索引的規(guī)定。  

SEE ALSO 參見

CREATE INDEX [create_index(7)]

#p#

NAME

DROP INDEX - remove an index

SYNOPSIS

DROP INDEX name [, ...] [ CASCADE | RESTRICT ]

DESCRIPTION

DROP INDEX drops an existing index from the database system. To execute this command you must be the owner of the index.  

PARAMETERS

name
The name (optionally schema-qualified) of an index to remove.
CASCADE
Automatically drop objects that depend on the index.
RESTRICT
Refuse to drop the index if any objects depend on it. This is the default.

EXAMPLES

This command will remove the index title_idx:

DROP INDEX title_idx;

COMPATIBILITY

DROP INDEX is a PostgreSQL language extension. There are no provisions for indexes in the SQL standard.  

SEE ALSO

CREATE INDEX [create_index(7)]

責(zé)任編輯:韓亞珊 來(lái)源: CMPP.net
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