drop_operator_class.7
来自「PostgreSQL 8.2中增加了很多企业用户所需要的功能和性能上的提高,其开」· 7 代码 · 共 51 行
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.\\" auto-generated by docbook2man-spec $Revision: 1.1.1.1 $.TH "DROP OPERATOR CLASS" "" "2008-01-03" "SQL - Language Statements" "SQL Commands".SH NAMEDROP OPERATOR CLASS \- remove an operator class.SH SYNOPSIS.sp.nfDROP OPERATOR CLASS [ IF EXISTS ] \fIname\fR USING \fIindex_method\fR [ CASCADE | RESTRICT ].sp.fi.SH "DESCRIPTION".PP\fBDROP OPERATOR CLASS\fR drops an existing operator class.To execute this command you must be the owner of the operator class..SH "PARAMETERS".TP\fBIF EXISTS\fRDo not throw an error if the operator class does not exist. A notice is issued in this case..TP\fB\fIname\fB\fRThe name (optionally schema-qualified) of an existing operator class..TP\fB\fIindex_method\fB\fRThe name of the index access method the operator class is for..TP\fBCASCADE\fRAutomatically drop objects that depend on the operator class..TP\fBRESTRICT\fRRefuse to drop the operator class if any objects depend on it.This is the default..SH "EXAMPLES".PPRemove the B-tree operator class widget_ops:.sp.nfDROP OPERATOR CLASS widget_ops USING btree;.sp.fiThis command will not succeed if there are any existing indexesthat use the operator class. Add CASCADE to dropsuch indexes along with the operator class..SH "COMPATIBILITY".PPThere is no \fBDROP OPERATOR CLASS\fR statement in theSQL standard..SH "SEE ALSO"ALTER OPERATOR CLASS [\fBalter_operator_class\fR(7)], CREATE OPERATOR CLASS [\fBcreate_operator_class\fR(l)]
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