/*-------------------------------------------------------------------------
 *
 * pg_aggregate.h--
 *    definition of the system "aggregate" relation (pg_aggregate)
 *    along with the relation's initial contents.
 *
 *
 * Copyright (c) 1994, Regents of the University of California
 *
 * $Id: pg_aggregate.h,v 1.2 1996/10/31 09:47:04 scrappy Exp $
 *
 * NOTES
 *    the genbki.sh script reads this file and generates .bki
 *    information from the DATA() statements.
 *
 *-------------------------------------------------------------------------
 */
#ifndef PG_AGGREGATE_H
#define PG_AGGREGATE_H

/* ----------------
 *	postgres.h contains the system type definintions and the
 *	CATALOG(), BOOTSTRAP and DATA() sugar words so this file
 *	can be read by both genbki.sh and the C compiler.
 * ----------------
 */

/* ----------------------------------------------------------------
 *	pg_aggregate definition.
 *
 *	cpp turns this into typedef struct FormData_pg_aggregate
 *
 *  aggname		name of the aggregate
 *  aggtransfn1		transition function 1
 *  aggtransfn2		transition function 2
 *  aggfinalfn		final function
 *  aggbasetype		type of data on which aggregate operates
 *  aggtranstype1	output types for xition func 1
 *  aggtranstype2	output types for xition func 2
 *  aggfinaltype	output type for final func
 *  agginitval1		initial aggregate value
 *  agginitval2		initial value for transition state 2
 * ----------------------------------------------------------------
 */ 
CATALOG(pg_aggregate) {
    NameData 		aggname;
    Oid			aggowner;
    regproc	 	aggtransfn1;
    regproc		aggtransfn2;
    regproc 		aggfinalfn;
    Oid			aggbasetype;
    Oid			aggtranstype1;
    Oid			aggtranstype2;
    Oid			aggfinaltype;
    text		agginitval1;	/* VARIABLE LENGTH FIELD */
    text		agginitval2;	/* VARIABLE LENGTH FIELD */
} FormData_pg_aggregate;

/* ----------------
 *	Form_pg_aggregate corresponds to a pointer to a tuple with
 *	the format of pg_aggregate relation.
 * ----------------
 */
typedef FormData_pg_aggregate	*Form_pg_aggregate;

/* ----------------
 *	compiler constants for pg_aggregate
 * ----------------
 */

#define Natts_pg_aggregate		11
#define Anum_pg_aggregate_aggname	1
#define Anum_pg_aggregate_aggowner	2
#define Anum_pg_aggregate_aggtransfn1	3
#define Anum_pg_aggregate_aggtransfn2	4
#define Anum_pg_aggregate_aggfinalfn	5
#define Anum_pg_aggregate_aggbasetype	6
#define Anum_pg_aggregate_aggtranstype1	7
#define Anum_pg_aggregate_aggtranstype2	8
#define Anum_pg_aggregate_aggfinaltype	9
#define Anum_pg_aggregate_agginitval1	10
#define Anum_pg_aggregate_agginitval2	11


/* ----------------
 * initial contents of pg_aggregate
 * ---------------
 */

DATA(insert OID = 0 ( avg   PGUID int4pl  int4inc  int4div  23  23  23  23 0  0 ));
DATA(insert OID = 0 ( avg   PGUID int2pl  int2inc  int2div  21  21  21  21  0  0 ));
DATA(insert OID = 0 ( avg PGUID float4pl float4inc float4div  700  700  700  700 0.0 0.0 ));
DATA(insert OID = 0 ( avg PGUID float8pl float8inc float8div  701  701  701  701 0.0 0.0 ));

DATA(insert OID = 0 ( sum   PGUID int4pl   - -  23  23  0  23  0   _null_ ));
DATA(insert OID = 0 ( sum   PGUID int2pl   - -  21  21  0  21  0   _null_ ));
DATA(insert OID = 0 ( sum PGUID float4pl - - 700  700 0  700  0.0 _null_ ));
DATA(insert OID = 0 ( sum PGUID float8pl - - 701  701 0  701  0.0 _null_ ));

DATA(insert OID = 0 ( max   PGUID int4larger   - -  23  23  0  23  _null_ _null_ ));
DATA(insert OID = 0 ( max   PGUID int2larger   - -  21  21  0  21  _null_ _null_ ));
DATA(insert OID = 0 ( max PGUID float4larger - - 700  700 0  700  _null_ _null_ ));
DATA(insert OID = 0 ( max PGUID float8larger - - 701  701 0  701  _null_ _null_ ));

DATA(insert OID = 0 ( min   PGUID int4smaller   - -  23  23  0  23  _null_ _null_ ));
DATA(insert OID = 0 ( min   PGUID int2smaller   - -  21  21  0  21    _null_ _null_ ));
DATA(insert OID = 0 ( min PGUID float4smaller - - 700  700 0  700   _null_ _null_ ));
DATA(insert OID = 0 ( min PGUID float8smaller - - 701  701 0  701  _null_ _null_ ));

DATA(insert OID = 0 ( count     PGUID - int4inc - 0 0 23 23  _null_ 0 ));

/*
 * prototypes for fucnctions in pg_aggregate.c
 */
extern void AggregateCreate(char *aggName, 
			    char *aggtransfn1Name,
			    char *aggtransfn2Name,
			    char *aggfinalfnName,
			    char *aggbasetypeName,
			    char *aggtransfn1typeName,
			    char *aggtransfn2typeName,
			    char *agginitval1,
			    char *agginitval2);
extern char *AggNameGetInitVal(char *aggName, Oid basetype, 
			       int xfuncno, bool *isNull);

#endif /* PG_AGGREGATE_H */




