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Shell Programming and Scripting
How to write If statement using && and operator in Unix
Post 302526694 by Avi on Wednesday 1st of June 2011 07:35:49 AM
06-01-2011
ok, thnaks 
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LEARN ABOUT REDHAT
drop_operator
DROP
OPERATOR(7) SQL Commands DROP OPERATOR(7) NAME
DROP OPERATOR - remove a user-defined operator SYNOPSIS
DROP OPERATOR id ( lefttype | NONE , righttype | NONE ) [ CASCADE | RESTRICT ] INPUTS id The identifier (optionally schema-qualified) of an existing operator. lefttype The type of the operator's left argument; write NONE if the operator has no left argument. righttype The type of the operator's right argument; write NONE if the operator has no right argument. CASCADE Automatically drop objects that depend on the operator. RESTRICT Refuse to drop the operator if there are any dependent objects. This is the default. OUTPUTS DROP OPERATOR The message returned if the command is successful. ERROR: RemoveOperator: binary operator 'oper' taking 'lefttype' and 'righttype' does not exist This message occurs if the specified binary operator does not exist. ERROR: RemoveOperator: left unary operator 'oper' taking 'lefttype' does not exist This message occurs if the left unary operator specified does not exist. ERROR: RemoveOperator: right unary operator 'oper' taking 'righttype' does not exist This message occurs if the right unary operator specified does not exist. DESCRIPTION
DROP OPERATOR drops an existing operator from the database. To execute this command you must be the owner of the operator. The left or right type of a left or right unary operator, respectively, must be specified as NONE. NOTES The DROP OPERATOR statement is a PostgreSQL language extension. Refer to CREATE OPERATOR [create_operator(7)] for information on how to create operators. USAGE
Remove power operator a^n for int4: DROP OPERATOR ^ (int4, int4); Remove left unary negation operator (! b) for boolean: DROP OPERATOR ! (none, bool); Remove right unary factorial operator (i !) for int4: DROP OPERATOR ! (int4, none); COMPATIBILITY
SQL92 There is no DROP OPERATOR in SQL92. SQL - Language Statements 2002-11-22 DROP OPERATOR(7)