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/*-------------------------------------------------------------------------
*
* pgdatabase.h
*
*
* DESCRIPTION
* Postgres Database Class:
* Query Postgres backend to obtain query results
*
* NOTES
* Currently under construction.
*
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
*
* $Id: pgdatabase.h,v 1.11 2001/05/09 17:46:11 momjian Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef PGDATABASE_H
#define PGDATABASE_H
#ifndef PGCONNECTION_H
#include "pgconnection.h"
#endif
// ****************************************************************
//
// PgDatabase - a class for accessing databases
//
// ****************************************************************
// This is the basic database access class. Its interface should
// be used only after a query has been sent to the backend and
// results are being received.
class PgDatabase : public PgConnection {
public:
// connect to the database with conninfo
explicit PgDatabase(const char* conninfo) : PgConnection(conninfo) {}
~PgDatabase() {} // close connection and clean up
typedef int size_type;
// query result access
size_type Tuples() const;
size_type CmdTuples() const;
int Fields();
const char* FieldName(int field_num) const;
int FieldNum(const char* field_name) const;
Oid FieldType(int field_num) const;
Oid FieldType(const char* field_name) const;
int FieldSize(int field_num) const;
int FieldSize(const char* field_name) const;
const char* GetValue(size_type tup_num, int field_num) const;
const char* GetValue(size_type tup_num, const char* field_name) const;
bool GetIsNull(size_type tup_num, int field_num) const;
bool GetIsNull(size_type tup_num, const char* field_name) const;
int GetLength(size_type tup_num, int field_num) const;
int GetLength(size_type tup_num, const char* field_name) const;
// OBSOLESCENT (use PQprint()):
void DisplayTuples(FILE *out=0, bool fillAlign=true,
const char* fieldSep="|", bool printHeader=true, bool quiet=false) const;
void PrintTuples(FILE *out=0, bool printAttName=true,
bool terseOutput=false, bool fillAlign=false) const;
// copy command related access
int GetLine(char str[], int length);
void PutLine(const char str[]);
const char* OidStatus() const;
int EndCopy();
protected:
PgDatabase() : PgConnection() {} // Do not connect
private:
// We don't support copying of PgDatabase objects,
// so make copy constructor and assignment op private.
PgDatabase(const PgDatabase&);
PgDatabase& operator= (const PgDatabase&);
};
#endif // PGDATABASE_H
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