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I found the following useful - just a way of using PQgetisnull from 

libpq++.

Patrick Welche
This commit is contained in:
Bruce Momjian 1999-09-21 21:19:31 +00:00
parent 79434a3d54
commit 4b06f6f9c8
2 changed files with 17 additions and 2 deletions
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15
src/interfaces/libpq++/pgdatabase.cc
View File

@ -10,7 +10,7 @@
* Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/interfaces/libpq++/Attic/pgdatabase.cc,v 1.3 1999/06/05 18:05:17 tgl Exp $
* $Header: /cvsroot/pgsql/src/interfaces/libpq++/Attic/pgdatabase.cc,v 1.4 1999/09/21 21:19:31 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -115,6 +115,18 @@ return PQgetvalue(pgResult, tup_num, FieldNum(field_name));
}
int PgDatabase::GetIsNull(int tup_num, int field_num)
{
return PQgetisnull(pgResult, tup_num, field_num);
}
int PgDatabase::GetIsNull(int tup_num, const char* field_name)
{
return PQgetisnull(pgResult, tup_num, FieldNum(field_name));
}
int PgDatabase::GetLength(int tup_num, int field_num)
{
return PQgetlength(pgResult, tup_num, field_num);
@ -126,6 +138,7 @@ int PgDatabase::GetLength(int tup_num, const char* field_name)
return PQgetlength(pgResult, tup_num, FieldNum(field_name));
}
int PgDatabase::GetLine(char* string, int length)
{
return PQgetline(pgConn, string, length);

4
src/interfaces/libpq++/pgdatabase.h
View File

@ -13,7 +13,7 @@
* Copyright (c) 1994, Regents of the University of California
*
*
* $Id: pgdatabase.h,v 1.2 1999/05/23 01:04:01 momjian Exp $
* $Id: pgdatabase.h,v 1.3 1999/09/21 21:19:31 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -48,6 +48,8 @@ public:
short FieldSize(const char* field_name);
const char* GetValue(int tup_num, int field_num);
const char* GetValue(int tup_num, const char* field_name);
int GetIsNull(int tup_num, int field_num);
int GetIsNull(int tup_num, const char* field_name);
int GetLength(int tup_num, int field_num);
int GetLength(int tup_num, const char* field_name);
void DisplayTuples(FILE *out = 0, int fillAlign = 1,