dblink_exec(3) [centos man page]

DBLINK_EXEC(3)						  PostgreSQL 9.2.7 Documentation					    DBLINK_EXEC(3)

NAME

       dblink_exec - executes a command in a remote database

SYNOPSIS

       dblink_exec(text connname, text sql [, bool fail_on_error]) returns text
       dblink_exec(text connstr, text sql [, bool fail_on_error]) returns text
       dblink_exec(text sql [, bool fail_on_error]) returns text

DESCRIPTION

       dblink_exec executes a command (that is, any SQL statement that doesn't return rows) in a remote database.

       When two text arguments are given, the first one is first looked up as a persistent connection's name; if found, the command is executed on
       that connection. If not found, the first argument is treated as a connection info string as for dblink_connect, and the indicated
       connection is made just for the duration of this command.

ARGUMENTS

       conname
	   Name of the connection to use; omit this parameter to use the unnamed connection.

       connstr
	   A connection info string, as previously described for dblink_connect.

       sql
	   The SQL command that you wish to execute in the remote database, for example insert into foo values(0,'a','{"a0","b0","c0"}').

       fail_on_error
	   If true (the default when omitted) then an error thrown on the remote side of the connection causes an error to also be thrown locally.
	   If false, the remote error is locally reported as a NOTICE, and the function's return value is set to ERROR.

RETURN VALUE

       Returns status, either the command's status string or ERROR.

EXAMPLES

	   SELECT dblink_connect('dbname=dblink_test_standby');
	    dblink_connect
	   ----------------
	    OK
	   (1 row)

	   SELECT dblink_exec('insert into foo values(21,''z'',''{"a0","b0","c0"}'');');
	      dblink_exec
	   -----------------
	    INSERT 943366 1
	   (1 row)

	   SELECT dblink_connect('myconn', 'dbname=regression');
	    dblink_connect
	   ----------------
	    OK
	   (1 row)

	   SELECT dblink_exec('myconn', 'insert into foo values(21,''z'',''{"a0","b0","c0"}'');');
	      dblink_exec
	   ------------------
	    INSERT 6432584 1
	   (1 row)

	   SELECT dblink_exec('myconn', 'insert into pg_class values (''foo'')',false);
	   NOTICE:  sql error
	   DETAIL:  ERROR:  null value in column "relnamespace" violates not-null constraint

	    dblink_exec
	   -------------
	    ERROR
	   (1 row)

PostgreSQL 9.2.7						    2014-02-17							    DBLINK_EXEC(3)

Check Out this Related Man Page

PG_ESCAPE_STRING(3)													       PG_ESCAPE_STRING(3)

pg_escape_string - Escape a string for query

SYNOPSIS

       string pg_escape_string ([resource  $connection], string  $data)

DESCRIPTION

       pg_escape_string(3)  escapes  a	string	for  querying  the database. It returns an escaped string in the PostgreSQL format without quotes.
       pg_escape_literal(3) is more preferred way to escape SQL parameters for PostgreSQL. addslashes(3) must not be used with PostgreSQL. If  the
       type  of the column is bytea, pg_escape_bytea(3) must be used instead. pg_escape_identifier(3) must be used to escape identifiers (e.g. ta-
       ble names, field names)

       Note

	       This function requires PostgreSQL 7.2 or later.

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.

CHANGELOG

       +--------+-------------------+
       |Version |		    |
       |	|		    |
       |	|    Description    |
       |	|		    |
       +--------+-------------------+
       | 5.2.0	|		    |
       |	|		    |
       |	| $connection added |
       |	|		    |
       +--------+-------------------+
EXAMPLES

       Example #1

	      pg_escape_string(3) example

	      <?php
		// Connect to the database
		$dbconn = pg_connect('dbname=foo');

		// Read in a text file (containing apostrophes and backslashes)
		$data = file_get_contents('letter.txt');

		// Escape the text data
		$escaped = pg_escape_string($data);

		// Insert it into the database
		pg_query("INSERT INTO correspondence (name, data) VALUES ('My letter', '{$escaped}')");
	      ?>

SEE ALSO

       pg_escape_bytea(3).

PHP Documentation Group 												       PG_ESCAPE_STRING(3)

Linux and UNIX Man Pages

dblink_exec(3) [centos man page]

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