temporal_aggfuncs.h

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/*****************************************************************************
 *
 * This MobilityDB code is provided under The PostgreSQL License.
 * Copyright (c) 2016-2025, Université libre de Bruxelles and MobilityDB
 * contributors
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 * under the GNU General Public License (GPLv2 or later).
 * Copyright (c) 2001-2025, PostGIS contributors
 *
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 *****************************************************************************/
 
#ifndef __TEMPORAL_AGGFUNCS_H__
#define __TEMPORAL_AGGFUNCS_H__
 
/* PostgreSQL */
#include <postgres.h>
/* MEOS */
#include <meos.h>
#include "temporal/temporal.h"
 
/*****************************************************************************/
 
extern Datum datum_min_int32(Datum l, Datum r);
extern Datum datum_max_int32(Datum l, Datum r);
extern Datum datum_min_float8(Datum l, Datum r);
extern Datum datum_max_float8(Datum l, Datum r);
extern Datum datum_sum_int32(Datum l, Datum r);
extern Datum datum_sum_float8(Datum l, Datum r);
extern Datum datum_min_text(Datum l, Datum r);
extern Datum datum_max_text(Datum l, Datum r);
extern Datum datum_sum_double2(Datum l, Datum r);
extern Datum datum_sum_double3(Datum l, Datum r);
extern Datum datum_sum_double4(Datum l, Datum r);
 
/* Specific skiplist functions for temporal aggregations */
 
extern int temporal_skiplist_common(SkipList *list, void **values, int count,
  int *lower, int *upper, int update[SKIPLIST_MAXLEVEL]);
extern void **temporal_skiplist_merge(void **spliced, int spliced_count,
  void **values, int count, datum_func2 func, bool crossings, int *newcount,
  void ***tofree, int *nfree);
extern void temporal_skiplist_splice(SkipList *list, void **values, int count,
  datum_func2 func, bool crossings);
 
/* Generic aggregation functions */
 
extern TInstant **tinstant_tagg(const TInstant **instants1, int count1,
  const TInstant **instants2, int count2, datum_func2 func, int *newcount,
  void ***tofree, int *nfree);
extern TSequence **tsequence_tagg(const TSequence **sequences1, int count1,
  const TSequence **sequences2, int count2, datum_func2 func,
  bool crossings, int *newcount);
extern SkipList *tcontseq_tagg_transfn(SkipList *state, const TSequence *seq,
  datum_func2 func, bool interpoint);
extern SkipList *temporal_tagg_combinefn(SkipList *state1, SkipList *state2,
  datum_func2 func, bool crossings);
 
extern SkipList *tinstant_tagg_transfn(SkipList *state, const TInstant *inst,
  datum_func2 func);
extern TSequence *tinstant_tavg_finalfn(const TInstant **instants, int count);
extern TSequenceSet *tsequence_tavg_finalfn(const TSequence **sequences, int count);
extern TInstant *tnumberinst_transform_tavg(const TInstant *inst);
extern Temporal **temporal_transform_tcount(const Temporal *temp, int *count);
extern Temporal **temporal_transform_tagg(const Temporal *temp, int *count,
  TInstant *(*func)(const TInstant *));
extern SkipList *tsequenceset_tagg_transfn(SkipList *state,
  const TSequenceSet *ss, datum_func2 func, bool crossings);
extern SkipList *tdiscseq_tagg_transfn(SkipList *state, const TSequence *seq,
  datum_func2 func);
 
extern SkipList *temporal_tagg_transfn(SkipList *state, const Temporal *temp,
  datum_func2, bool crossings);
extern SkipList *temporal_tagg_combinefn(SkipList *state1, SkipList *state2,
  datum_func2 func, bool crossings);
extern SkipList *temporal_tagg_transform_transfn(SkipList *state, const Temporal *temp,
  datum_func2 func, bool crossings, TInstant *(*transform)(const TInstant *));
  
/*****************************************************************************/
 
#endif