/* File:			columninfo.h
 *
 * Description:		See "columninfo.c"
 *
 * Comments:		See "readme.txt" for copyright and license information.
 *
 */

#ifndef __COLUMNINFO_H__
#define __COLUMNINFO_H__

#include "psqlodbc.h"

#include <libpq-fe.h>

struct ColumnInfoClass_
{
	UInt4		refcount;	/* reference count. A ColumnInfo can be shared by
							 * several qresults. */
	Int2		num_fields;
	struct srvr_info
	{
		char	*name;		/* field name */
		OID	adtid;		/* type oid */
		Int2	adtsize;	/* type size */
		Int4	display_size;	/* the display size (longest row) */
		Int4	atttypmod;	/* the length of bpchar/varchar */
		OID	relid;		/* the relation id */
		Int2	attid;		/* the attribute number */
	}	*coli_array;
};

#define CI_get_num_fields(self)			(self->num_fields)
#define CI_get_oid(self, col)			(self->coli_array[col].adtid)
#define CI_get_fieldname(self, col)		(self->coli_array[col].name)
#define CI_get_fieldsize(self, col)		(self->coli_array[col].adtsize)
#define CI_get_display_size(self, col)		(self->coli_array[col].display_size)
#define CI_get_atttypmod(self, col)		(self->coli_array[col].atttypmod)
#define CI_get_relid(self, col)	(self->coli_array[col].relid)
#define CI_get_attid(self, col)	(self->coli_array[col].attid)

ColumnInfoClass *CI_Constructor(void);
void		CI_Destructor(ColumnInfoClass *self);
void		CI_free_memory(ColumnInfoClass *self);
BOOL		CI_read_fields_from_pgres(ColumnInfoClass *self, PGresult *pgres);

/* functions for setting up the fields from within the program, */
/* without reading from a socket */
void		CI_set_num_fields(ColumnInfoClass *self, int new_num_fields);
void CI_set_field_info(ColumnInfoClass *self, int field_num, const char *new_name,
		OID new_adtid, Int2 new_adtsize, Int4 atttypmod,
		OID new_relid, OID new_attid);

#endif
