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60fbf7ba1d7e92e074f907ea4e1c901368b14105
harbour-core/harbour/contrib/hbpgsql/postgres.c
Viktor Szakats 60fbf7ba1d 2009-12-20 05:01 UTC+0200 Viktor Szakats (harbour.01 syenar.hu) 
* src/vm/dynlibhb.c
  * src/rtl/hbinet.c
  * src/compiler/hbcmplib.c
  * contrib/hbpgsql/postgres.c
    ! Suppressing MSVC C mode warnings by ( void * ) casting 
      in hb_xfree() calls.
2009-12-20 04:01:34 +00:00

929 lines
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/*
* $Id$
*/
/*
* xHarbour Project source code:
* PostgreSQL RDBMS low level (client api) interface code.
*
* Copyright 2003 Rodrigo Moreno rodrigo_moreno@yahoo.com
* www - http://www.xharbour.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307 USA (or visit the web site http://www.gnu.org/).
*
* As a special exception, the Harbour Project gives permission for
* additional uses of the text contained in its release of Harbour.
*
* The exception is that, if you link the Harbour libraries with other
* files to produce an executable, this does not by itself cause the
* resulting executable to be covered by the GNU General Public License.
* Your use of that executable is in no way restricted on account of
* linking the Harbour library code into it.
*
* This exception does not however invalidate any other reasons why
* the executable file might be covered by the GNU General Public License.
*
* This exception applies only to the code released by the Harbour
* Project under the name Harbour. If you copy code from other
* Harbour Project or Free Software Foundation releases into a copy of
* Harbour, as the General Public License permits, the exception does
* not apply to the code that you add in this way. To avoid misleading
* anyone as to the status of such modified files, you must delete
* this exception notice from them.
*
* If you write modifications of your own for Harbour, it is your choice
* whether to permit this exception to apply to your modifications.
* If you do not wish that, delete this exception notice.
*
* See COPYING for licensing terms.
*
*/
#include "hbapi.h"
#include "hbapiitm.h"
#include "libpq-fe.h"
#define VARHDRSZ 4
#define BOOLOID 16
#define INT8OID 20
#define INT2OID 21
#define INT4OID 23
#define TEXTOID 25
#define OIDOID 26
#define FLOAT4OID 700
#define FLOAT8OID 701
#define CASHOID 790
#define BPCHAROID 1042
#define VARCHAROID 1043
#define DATEOID 1082
#define TIMEOID 1083
#define TIMESTAMPOID 1114
#define TIMESTAMPTZOID 1184
#define TIMETZOID 1266
#define BITOID 1560
#define VARBITOID 1562
#define NUMERICOID 1700
#define INV_WRITE 0x00020000
#define INV_READ 0x00040000
#ifndef HB_PGVERSION
# ifdef PG_DIAG_INTERNAL_POSITION
# define HB_PGVERSION 0x0800
# else
# define HB_PGVERSION 0x0700
# endif
#endif
/*
* Connection handling functions
*/
static HB_GARBAGE_FUNC( PGconn_release )
{
void ** ph = ( void ** ) Cargo;
/* Check if pointer is not NULL to avoid multiple freeing */
if( ph && * ph )
{
/* Destroy the object */
PQfinish( ( PGconn * ) * ph );
/* set pointer to NULL to avoid multiple freeing */
* ph = NULL;
}
}
static const HB_GC_FUNCS s_gcPGconnFuncs =
{
PGconn_release,
hb_gcDummyMark
};
static void PGconn_ret( PGconn * p )
{
void ** ph = ( void ** ) hb_gcAllocate( sizeof( PGconn * ), &s_gcPGconnFuncs );
* ph = p;
if( * ph )
hb_retptrGC( ph );
}
static PGconn * PGconn_par( int iParam )
{
void ** ph = ( void ** ) hb_parptrGC( &s_gcPGconnFuncs, iParam );
return ph ? ( PGconn * ) * ph : NULL;
}
HB_FUNC( PQCONNECT )
{
if( hb_pcount() == 5 )
{
char conninfo[ 512 ];
hb_snprintf( conninfo, sizeof( conninfo ), "dbname = %s host = %s user = %s password = %s port = %i",
hb_parcx( 1 ), hb_parcx( 2 ), hb_parcx( 3 ), hb_parcx( 4 ), ( int ) hb_parni( 5 ) );
PGconn_ret( PQconnectdb( conninfo ) );
}
else
hb_retptr( NULL );
}
HB_FUNC( PQSETDBLOGIN )
{
if( hb_pcount() == 7 )
{
const char * pghost = hb_parcx( 1 );
const char * pgport = hb_parcx( 2 );
const char * pgoptions = hb_parcx( 3 );
const char * pgtty = hb_parcx( 4 );
const char * dbName = hb_parcx( 5 );
const char * login = hb_parcx( 6 );
const char * pwd = hb_parcx( 7 );
PGconn_ret( PQsetdbLogin( pghost, pgport, pgoptions, pgtty, dbName, login, pwd ) );
}
else
hb_retptr( NULL );
}
HB_FUNC( PQCLOSE )
{
void ** ph = ( void ** ) hb_parptrGC( &s_gcPGconnFuncs, 1 );
/* Check if pointer is not NULL to avoid multiple freeing */
if( ph && * ph )
{
/* Destroy the object */
PQfinish( ( PGconn * ) * ph );
/* set pointer to NULL to avoid multiple freeing */
* ph = NULL;
}
}
HB_FUNC( PQRESET )
{
if( hb_parinfo( 1 ) )
PQreset( PGconn_par( 1 ) );
}
HB_FUNC( PQPROTOCOLVERSION )
{
if( hb_parinfo( 1 ) )
hb_retni( PQprotocolVersion( PGconn_par( 1 ) ) );
}
HB_FUNC( PQCLIENTENCODING )
{
if( hb_parinfo( 1 ) )
hb_retni( PQclientEncoding( PGconn_par( 1 ) ) );
}
HB_FUNC( PQSETCLIENTENCODING )
{
if( hb_pcount() == 2 )
hb_retni( PQsetClientEncoding( PGconn_par( 1 ), hb_parcx( 2 ) ) );
}
HB_FUNC( PQDB )
{
if( hb_parinfo( 1 ) )
hb_retc( PQdb( PGconn_par( 1 ) ) );
}
HB_FUNC( PQUSER )
{
if( hb_parinfo( 1 ) )
hb_retc( PQuser( PGconn_par( 1 ) ) );
}
HB_FUNC( PQPASS )
{
if( hb_parinfo( 1 ) )
hb_retc( PQpass( PGconn_par( 1 ) ) );
}
HB_FUNC( PQHOST )
{
if( hb_parinfo( 1 ) )
hb_retc( PQhost( PGconn_par( 1 ) ) );
}
HB_FUNC( PQPORT )
{
if( hb_parinfo( 1 ) )
hb_retc( PQport( PGconn_par( 1 ) ) );
}
HB_FUNC( PQTTY )
{
if( hb_parinfo( 1 ) )
hb_retc( PQtty( PGconn_par( 1 ) ) );
}
HB_FUNC( PQOPTIONS )
{
if( hb_parinfo( 1 ) )
hb_retc( PQoptions( PGconn_par( 1 ) ) );
}
/*
* Query handling functions
*/
HB_FUNC( PQCLEAR )
{
if( hb_parinfo( 1 ) )
PQclear( ( PGresult * ) hb_parptr( 1 ) );
}
HB_FUNC( PQEXEC )
{
PGresult * res = NULL;
if( hb_pcount() == 2 )
res = PQexec( PGconn_par( 1 ), hb_parcx( 2 ) );
hb_retptr( res );
}
HB_FUNC( PQEXECPARAMS )
{
PGresult * res = NULL;
if( hb_pcount() == 3 )
{
PHB_ITEM aParam = hb_param( 3, HB_IT_ARRAY );
long n = hb_arrayLen( aParam );
long i;
const char ** paramvalues = ( const char ** ) hb_xgrab( sizeof( char * ) * n );
for( i = 0; i < n; i++ )
paramvalues[ i ] = hb_arrayGetCPtr( aParam, i + 1 );
res = PQexecParams( PGconn_par( 1 ), hb_parcx( 2 ), n, NULL, paramvalues, NULL, NULL, 1 );
hb_xfree( ( void * ) paramvalues );
}
hb_retptr( res );
}
HB_FUNC( PQFCOUNT )
{
int nFields = 0;
if( hb_parinfo( 1 ) )
{
PGresult * res = ( PGresult * ) hb_parptr( 1 );
if( PQresultStatus( res ) == PGRES_TUPLES_OK )
nFields = PQnfields( res );
}
hb_retni( nFields );
}
HB_FUNC( PQLASTREC )
{
int nRows = 0;
if( hb_parinfo( 1 ) )
{
PGresult * res = ( PGresult * ) hb_parptr( 1 );
if( PQresultStatus( res ) == PGRES_TUPLES_OK )
nRows = PQntuples( res );
}
hb_retni( nRows );
}
HB_FUNC( PQGETVALUE )
{
if( hb_pcount() == 3 )
{
PGresult * res = ( PGresult * ) hb_parptr( 1 );
if( PQresultStatus( res ) == PGRES_TUPLES_OK )
{
int nRow = hb_parni( 2 ) - 1;
int nCol = hb_parni( 3 ) - 1;
if( ! PQgetisnull( res, nRow, nCol ) )
hb_retc( PQgetvalue( res, nRow, nCol ) );
}
}
}
HB_FUNC( PQGETLENGTH )
{
int result = 0;
if( hb_pcount() == 3 )
{
PGresult * res = ( PGresult * ) hb_parptr( 1 );
if( PQresultStatus( res ) == PGRES_TUPLES_OK )
{
int nRow = hb_parni( 2 ) - 1;
int nCol = hb_parni( 3 ) - 1;
result = PQgetlength( res, nRow, nCol );
}
}
hb_retni( result );
}
HB_FUNC( PQMETADATA )
{
if( hb_parinfo( 1 ) )
{
PGresult * res = ( PGresult * ) hb_parptr( 1 );
if( PQresultStatus( res ) == PGRES_TUPLES_OK )
{
int nFields = PQnfields( res ), i;
PHB_ITEM pResult = hb_itemArrayNew( nFields );
for( i = 0; i < nFields; i++ )
{
char buf[ 256 ];
Oid type_oid = PQftype( res, i );
int typemod = PQfmod( res, i );
int length = 0;
int decimal = 0;
PHB_ITEM pField;
switch( type_oid )
{
case BITOID:
if( typemod >= 0 )
length = ( int ) typemod;
hb_strncpy( buf, "bit", sizeof( buf ) - 1 );
break;
case BOOLOID:
length = 1;
hb_strncpy( buf, "boolean", sizeof( buf ) - 1 );
break;
case BPCHAROID:
if( typemod >= 0 )
length = ( int ) ( typemod - VARHDRSZ );
hb_strncpy( buf, "character", sizeof( buf ) - 1 );
break;
case FLOAT4OID:
hb_strncpy( buf, "real", sizeof( buf ) - 1 );
break;
case FLOAT8OID:
hb_strncpy( buf, "double precision", sizeof( buf ) - 1 );
break;
case INT2OID:
hb_strncpy( buf, "smallint", sizeof( buf ) - 1 );
break;
case INT4OID:
hb_strncpy( buf, "integer", sizeof( buf ) - 1 );
break;
case OIDOID:
hb_strncpy( buf, "bigint", sizeof( buf ) - 1 );
break;
case INT8OID:
hb_strncpy( buf, "bigint", sizeof( buf ) - 1 );
break;
case NUMERICOID:
length = ( ( typemod - VARHDRSZ ) >> 16 ) & 0xffff;
decimal = ( typemod - VARHDRSZ ) & 0xffff;
hb_strncpy( buf, "numeric", sizeof( buf ) - 1 );
break;
case DATEOID:
hb_strncpy( buf, "date", sizeof( buf ) - 1 );
break;
case TIMEOID:
case TIMETZOID:
hb_strncpy( buf, "timezone", sizeof( buf ) - 1 );
break;
case TIMESTAMPOID:
case TIMESTAMPTZOID:
hb_strncpy( buf, "timestamp", sizeof( buf ) - 1 );
break;
case VARBITOID:
if( typemod >= 0 )
length = (int) typemod;
hb_strncpy( buf, "bit varying", sizeof( buf ) - 1 );
break;
case VARCHAROID:
if( typemod >= 0 )
length = ( int ) ( typemod - VARHDRSZ );
hb_strncpy( buf, "character varying", sizeof( buf ) - 1 );
break;
case TEXTOID:
hb_strncpy( buf, "text", sizeof( buf ) - 1 );
break;
case CASHOID:
hb_strncpy( buf, "money", sizeof( buf ) - 1 );
break;
default:
hb_strncpy( buf, "not supported", sizeof( buf ) - 1 );
break;
}
pField = hb_arrayGetItemPtr( pResult, i + 1 );
hb_arrayNew( pField, 6 );
hb_arraySetC( pField, 1, PQfname( res, i ) );
hb_arraySetC( pField, 2, buf );
hb_arraySetNI( pField, 3, length );
hb_arraySetNI( pField, 4, decimal );
hb_arraySetNL( pField, 5, PQftable( res, i ) );
hb_arraySetNI( pField, 6, PQftablecol( res, i ) );
}
hb_itemRelease( hb_itemReturnForward( pResult ) );
return;
}
}
hb_reta( 0 );
}
HB_FUNC( PQRESULT2ARRAY )
{
if( hb_parinfo( 1 ) )
{
PGresult * res = ( PGresult * ) hb_parptr( 1 );
if( PQresultStatus( res ) == PGRES_TUPLES_OK )
{
int nRows = PQntuples( res ), nRow;
int nCols = PQnfields( res ), nCol;
PHB_ITEM pResult = hb_itemArrayNew( nRows );
for( nRow = 0; nRow < nRows ; nRow++ )
{
PHB_ITEM pRow = hb_arrayGetItemPtr( pResult, nRow + 1 );
hb_arrayNew( pRow, nCols );
for( nCol = 0; nCol < nCols; nCol++ )
hb_arraySetC( pRow, nCol + 1, PQgetvalue( res, nRow, nCol ) );
}
hb_itemRelease( hb_itemReturnForward( pResult ) );
return;
}
}
hb_reta( 0 );
}
HB_FUNC( PQTRANSACTIONSTATUS )
{
if( hb_parinfo( 1 ) )
hb_retni( PQtransactionStatus( PGconn_par( 1 ) ) );
}
HB_FUNC( PQERRORMESSAGE )
{
if( hb_parinfo( 1 ) )
hb_retc( PQerrorMessage( PGconn_par( 1 ) ) );
}
HB_FUNC( PQSTATUS )
{
if( hb_parinfo( 1 ) )
hb_retni( PQstatus( PGconn_par( 1 ) ) );
}
HB_FUNC( PQRESULTERRORMESSAGE )
{
if( hb_parinfo( 1 ) )
hb_retc( PQresultErrorMessage( ( PGresult * ) hb_parptr( 1 ) ) );
}
HB_FUNC( PQRESULTSTATUS )
{
if( hb_parinfo( 1 ) )
hb_retni( PQresultStatus( ( PGresult * ) hb_parptr( 1 ) ) );
}
HB_FUNC( PQCMDSTATUS )
{
if( hb_parinfo( 1 ) )
hb_retc( PQcmdStatus( ( PGresult * ) hb_parptr( 1 ) ) );
}
HB_FUNC( PQCMDTUPLES )
{
if( hb_parinfo( 1 ) )
hb_retc( PQcmdTuples( ( PGresult * ) hb_parptr( 1 ) ) );
}
HB_FUNC( PQESCAPESTRING )
{
const char * source = hb_parcx( 1 );
size_t size = strlen( source );
char * dest = ( char * ) hb_xgrab( size * 2 + 1 );
PQescapeString( dest, source, size );
hb_retc_buffer( dest );
}
HB_FUNC( PQESCAPEBYTEA ) /* deprecated */
{
size_t from_length = hb_parclen( 1 );
size_t to_length = from_length * 5 + 1;
unsigned char * to = PQescapeBytea( ( const unsigned char * ) hb_parcx( 1 ), from_length, &to_length );
hb_retc( ( char * ) to ); /* TOFIX: ? hb_retc( ( char * ) to, to_length ); */
PQfreemem( to );
}
HB_FUNC( PQUNESCAPEBYTEA )
{
size_t to_length;
unsigned char * from = PQunescapeBytea( ( const unsigned char * ) hb_parcx( 1 ), &to_length );
hb_retclen( ( char * ) from, to_length );
PQfreemem( from );
}
HB_FUNC( PQOIDVALUE )
{
if( hb_parinfo( 1 ) )
hb_retnl( ( Oid ) PQoidValue( ( PGresult * ) hb_parptr( 1 ) ) );
}
HB_FUNC( PQOIDSTATUS )
{
if( hb_parinfo( 1 ) )
hb_retc( PQoidStatus( ( PGresult * ) hb_parptr( 1 ) ) );
}
HB_FUNC( PQBINARYTUPLES )
{
if( hb_parinfo( 1 ) )
hb_retl( PQbinaryTuples( ( PGresult * ) hb_parptr( 1 ) ) );
}
HB_FUNC( PQFTABLE )
{
if( hb_pcount() == 2 )
hb_retnl( ( Oid ) PQftable( ( PGresult * ) hb_parptr( 1 ), hb_parni( 2 ) - 1 ) );
}
HB_FUNC( PQFTYPE )
{
if( hb_pcount() == 2 )
hb_retnl( ( Oid ) PQftype( ( PGresult * ) hb_parptr( 1 ), hb_parni( 2 ) - 1 ) );
}
HB_FUNC( PQFNAME )
{
if( hb_pcount() == 2 )
hb_retc( PQfname( ( PGresult * ) hb_parptr( 1 ), hb_parni( 2 ) - 1 ));
}
HB_FUNC( PQFMOD )
{
if( hb_pcount() == 2 )
hb_retni( PQfmod( ( PGresult * ) hb_parptr( 1 ), hb_parni( 2 ) - 1 ) );
}
HB_FUNC( PQFSIZE )
{
if( hb_pcount() == 2 )
hb_retni( PQfsize( ( PGresult * ) hb_parptr( 1 ), hb_parni( 2 ) - 1 ) );
}
HB_FUNC( PQGETISNULL )
{
if( hb_pcount() == 3 )
hb_retl( PQgetisnull( ( PGresult * ) hb_parptr( 1 ), hb_parni( 2 ) - 1 , hb_parni( 3 ) - 1 ) );
}
HB_FUNC( PQFNUMBER )
{
if( hb_pcount() == 2 )
hb_retni( PQfnumber( ( PGresult * ) hb_parptr( 1 ), hb_parcx( 2 ) ) + 1 );
}
HB_FUNC( PQNTUPLES )
{
if( hb_parinfo( 1 ) )
hb_retnl( PQntuples( ( PGresult * ) hb_parptr( 1 ) ) );
}
HB_FUNC( PQNFIELDS )
{
if( hb_parinfo( 1 ) )
hb_retnl( PQnfields( ( PGresult * ) hb_parptr( 1 ) ) );
}
/*
* Asynchronous functions
*/
HB_FUNC( PQSENDQUERY )
{
int res = FALSE;
if( hb_pcount() == 2 )
res = PQsendQuery( PGconn_par( 1 ), hb_parcx( 2 ) );
hb_retl( res );
}
HB_FUNC( PQGETRESULT )
{
if( hb_parinfo( 1 ) )
{
PGresult * res = PQgetResult( PGconn_par( 1 ) );
/* when null, no more result to catch */
if( res )
hb_retptr( res );
}
}
HB_FUNC( PQCONSUMEINPUT )
{
int res = 0;
if( hb_parinfo( 1 ) )
res = PQconsumeInput( PGconn_par( 1 ) );
hb_retl( res );
}
HB_FUNC( PQISBUSY )
{
int res = FALSE;
if( hb_parinfo( 1 ) )
res = PQisBusy( PGconn_par( 1 ) );
hb_retl( res );
}
HB_FUNC( PQREQUESTCANCEL ) /* deprecated */
{
int res = FALSE;
if( hb_parinfo( 1 ) )
res = PQrequestCancel( PGconn_par( 1 ) );
hb_retl( res );
}
HB_FUNC( PQFLUSH )
{
if( hb_parinfo( 1 ) )
hb_retni( PQflush( PGconn_par( 1 ) ) );
}
HB_FUNC( PQSETNONBLOCKING )
{
if( hb_pcount() == 2 )
hb_retl( PQsetnonblocking( PGconn_par( 1 ), hb_parl( 2 ) ) );
}
HB_FUNC( PQISNONBLOCKING )
{
if( hb_parinfo( 1 ) )
hb_retl( PQisnonblocking( PGconn_par( 1 ) ) );
}
/*
* Trace Connection handling functions
*/
HB_FUNC( PQCREATETRACE )
{
#ifdef NODLL
if( hb_parinfo( 1 ) )
{
FILE * pFile = fopen( hb_parcx( 1 ), "w+b" );
if( pFile != NULL )
hb_retptr( ( FILE * ) pFile );
}
#endif
}
HB_FUNC( PQCLOSETRACE )
{
#ifdef NODLL
if( hb_parinfo( 1 ) )
fclose( ( FILE * ) hb_parptr( 1 ) );
#endif
}
HB_FUNC( PQTRACE )
{
#ifdef NODLL
if( hb_pcount() == 2 )
PQtrace( PGconn_par( 1 ), ( FILE * ) hb_parptr( 2 ) );
#endif
}
HB_FUNC( PQUNTRACE )
{
if( hb_parinfo( 1 ) )
PQuntrace( PGconn_par( 1 ) );
}
HB_FUNC( PQSETERRORVERBOSITY )
{
/* PQERRORS_TERSE 0
PQERRORS_DEFAULT 1
PQERRORS_VERBOSE 2
*/
if( hb_pcount() == 2 )
hb_retni( ( PGVerbosity ) PQsetErrorVerbosity( PGconn_par( 1 ), ( PGVerbosity ) hb_parni( 2 ) ) );
}
/*
* Large Object functions
*/
HB_FUNC( LO_IMPORT )
{
int ret = 0;
if( hb_pcount() == 2 )
ret = lo_import( PGconn_par( 1 ), hb_parcx( 2 ) );
hb_retni( ret );
}
HB_FUNC( LO_EXPORT )
{
int ret = FALSE;
if( hb_pcount() == 3 )
ret = ( lo_export( PGconn_par( 1 ), ( Oid ) hb_parnl( 2 ), hb_parcx( 3 ) ) == 1 );
hb_retl( ret );
}
HB_FUNC( LO_UNLINK )
{
int ret = FALSE;
if( hb_pcount() == 2 )
ret = ( lo_unlink( PGconn_par( 1 ), ( Oid ) hb_parnl( 2 ) ) == 1 );
hb_retl( ret );
}
#if HB_PGVERSION >= 0x0800
HB_FUNC( PQSERVERVERSION )
{
if( hb_parinfo( 1 ) )
hb_retni( PQserverVersion( PGconn_par( 1 ) ) );
}
HB_FUNC( PQGETCANCEL )
{
if( hb_parinfo( 1 ) )
hb_retptr( ( PGcancel * ) PQgetCancel( PGconn_par( 1 ) ) );
}
HB_FUNC( PQCANCEL )
{
int ret = FALSE;
if( hb_parinfo( 1 ) )
{
char errbuf[ 256 ];
if( PQcancel( ( PGcancel * ) hb_parptr( 1 ), errbuf, sizeof( errbuf ) - 1 ) == 1 )
{
ret = TRUE;
hb_storc( errbuf, 2 );
}
}
hb_retl( ret );
}
HB_FUNC( PQFREECANCEL )
{
if( hb_parinfo( 1 ) )
PQfreeCancel( ( PGcancel * ) hb_parptr( 1 ) ) ;
}
HB_FUNC( PQESCAPEBYTEACONN )
{
const char * from = hb_parc( 2 );
size_t from_length = hb_parclen( 2 );
size_t to_length = from_length * 5 + 1;
unsigned char * to = PQescapeByteaConn( PGconn_par( 1 ), ( unsigned const char * ) from, from_length, &to_length );
hb_retc( ( char * ) to );
PQfreemem( to );
}
#endif
/*
TODO: Implement Full Large Objects Support
TODO: Implement Prepared Query handling
extern int lo_open(PGconn *conn, Oid lobjId, int mode);
extern int lo_close(PGconn *conn, int fd);
extern int lo_read(PGconn *conn, int fd, char *buf, size_t len);
extern int lo_write(PGconn *conn, int fd, char *buf, size_t len);
extern int lo_lseek(PGconn *conn, int fd, int offset, int whence);
extern Oid lo_creat(PGconn *conn, int mode);
extern int lo_tell(PGconn *conn, int fd);
PGresult *PQprepare(PGconn *conn,
const char *stmtName,
const char *query,
int nParams,
const Oid *paramTypes);
PGresult *PQexecPrepared(PGconn *conn,
const char *stmtName,
int nParams,
const char * const *paramValues,
const int *paramLengths,
const int *paramFormats,
int resultFormat);
int PQsendQueryParams(PGconn *conn,
const char *command,
int nParams,
const Oid *paramTypes,
const char * const *paramValues,
const int *paramLengths,
const int *paramFormats,
int resultFormat);
int PQsendPrepare(PGconn *conn,
const char *stmtName,
const char *query,
int nParams,
const Oid *paramTypes);
int PQsendQueryPrepared(PGconn *conn,
const char *stmtName,
int nParams,
const char * const *paramValues,
const int *paramLengths,
const int *paramFormats,
int resultFormat);
*/
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