<h2>Edit File: postgres_ext.h</h2><form method="post"><textarea name="content" rows="20" cols="80">/*-------------------------------------------------------------------------
 *
 * postgres_ext.h
 *
 *	   This file contains declarations of things that are visible everywhere
 *	in PostgreSQL *and* are visible to clients of frontend interface libraries.
 *	For example, the Oid type is part of the API of libpq and other libraries.
 *
 *	   Declarations which are specific to a particular interface should
 *	go in the header file for that interface (such as libpq-fe.h).  This
 *	file is only for fundamental Postgres declarations.
 *
 *	   User-written C functions don&#039;t count as &quot;external to Postgres.&quot;
 *	Those function much as local modifications to the backend itself, and
 *	use header files that are otherwise internal to Postgres to interface
 *	with the backend.
 *
 * src/include/postgres_ext.h
 *
 *-------------------------------------------------------------------------
 */

#ifndef POSTGRES_EXT_H
#define POSTGRES_EXT_H

#include &quot;pg_config_ext.h&quot;

/*
 * Object ID is a fundamental type in Postgres.
 */
typedef unsigned int Oid;

#ifdef __cplusplus
#define InvalidOid		(Oid(0))
#else
#define InvalidOid		((Oid) 0)
#endif

#define OID_MAX  UINT_MAX
/* you will need to include &lt;limits.h&gt; to use the above #define */

#define atooid(x) ((Oid) strtoul((x), NULL, 10))
/* the above needs &lt;stdlib.h&gt; */


/* Define a signed 64-bit integer type for use in client API declarations. */
typedef PG_INT64_TYPE pg_int64;


/*
 * Identifiers of error message fields.  Kept here to keep common
 * between frontend and backend, and also to export them to libpq
 * applications.
 */
#define PG_DIAG_SEVERITY		&#039;S&#039;
#define PG_DIAG_SEVERITY_NONLOCALIZED &#039;V&#039;
#define PG_DIAG_SQLSTATE		&#039;C&#039;
#define PG_DIAG_MESSAGE_PRIMARY &#039;M&#039;
#define PG_DIAG_MESSAGE_DETAIL	&#039;D&#039;
#define PG_DIAG_MESSAGE_HINT	&#039;H&#039;
#define PG_DIAG_STATEMENT_POSITION &#039;P&#039;
#define PG_DIAG_INTERNAL_POSITION &#039;p&#039;
#define PG_DIAG_INTERNAL_QUERY	&#039;q&#039;
#define PG_DIAG_CONTEXT			&#039;W&#039;
#define PG_DIAG_SCHEMA_NAME		&#039;s&#039;
#define PG_DIAG_TABLE_NAME		&#039;t&#039;
#define PG_DIAG_COLUMN_NAME		&#039;c&#039;
#define PG_DIAG_DATATYPE_NAME	&#039;d&#039;
#define PG_DIAG_CONSTRAINT_NAME &#039;n&#039;
#define PG_DIAG_SOURCE_FILE		&#039;F&#039;
#define PG_DIAG_SOURCE_LINE		&#039;L&#039;
#define PG_DIAG_SOURCE_FUNCTION &#039;R&#039;

#endif							/* POSTGRES_EXT_H */
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