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Top Forums Shell Programming and Scripting If condition to check null variable Post 302831399 by vidyadhar85 on Thursday 11th of July 2013 02:02:36 AM
Old 07-11-2013
put NULL in double quotes.. and if you are equating string better use = than -eq
 

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PG_ESCAPE_IDENTIFIER(3) 												   PG_ESCAPE_IDENTIFIER(3)

pg_escape_identifier - Escape a identifier for insertion into a text field

SYNOPSIS
string pg_escape_identifier ([resource $connection], string $data) DESCRIPTION
pg_escape_identifier(3) escapes a identifier (e.g. table, field names) for quering the database. It returns an escaped identifier string for PostgreSQL server. pg_escape_identifier(3) adds double quotes before and after data. Users should not add double quotes. Use of this function is recommended for identifier parameters in query. For SQL literals (i.e. parameters except bytea), pg_escape_literal(3) or pg_escape_string(3) muse be used. For bytea type fields, pg_escape_bytea(3) must be used instead. Note This function has internal escape code and can also be used with PostgreSQL 8.4 or less. PARAMETERS
o $connection - PostgreSQL database connection resource. When $connection is not present, the default connection is used. The default connection is the last connection made by pg_connect(3) or pg_pconnect(3). o $data - A string containing text to be escaped. RETURN VALUES
A string containing the escaped data. EXAMPLES
Example #1 pg_escape_identifier(3) example <?php // Connect to the database $dbconn = pg_connect('dbname=foo'); // Escape the table name data $escaped = pg_escape_identifier($table_name); // Select rows from $table_name pg_query("SELECT * FROM {$escaped};"); ?> SEE ALSO
pg_escape_literal(3), pg_escape_bytea(3), pg_escape_string(3). PHP Documentation Group PG_ESCAPE_IDENTIFIER(3)
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