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/*-------------------------------------------------------------------------
*
* partprune.h
* prototypes for partprune.c
*
*
* Portions Copyright (c) 1996-2018, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/include/partitioning/partprune.h
*
*-------------------------------------------------------------------------
*/
#ifndef PARTPRUNE_H
#define PARTPRUNE_H
#include "nodes/execnodes.h"
#include "nodes/relation.h"
/*
* PartitionPruneContext
*
* Information about a partitioned table needed to perform partition pruning.
*/
typedef struct PartitionPruneContext
{
/* Partition key information */
char strategy;
int partnatts;
Oid *partopfamily;
Oid *partopcintype;
Oid *partcollation;
FmgrInfo *partsupfunc;
/* Number of partitions */
int nparts;
/* Partition boundary info */
PartitionBoundInfo boundinfo;
/*
* Can be set when the context is used from the executor to allow params
* found matching the partition key to be evaluated.
*/
PlanState *planstate;
/*
* Parameters that are safe to be used for partition pruning. execparams
* are not safe to use until the executor is running.
*/
Bitmapset *safeparams;
/*
* Array of ExprStates, indexed as per PruneCtxStateIdx; one for each
* partkey in each pruning step. Allocated if planstate is non-NULL,
* otherwise NULL.
*/
ExprState **exprstates;
} PartitionPruneContext;
#define PruneCxtStateIdx(partnatts, step_id, keyno) \
((partnatts) * (step_id) + (keyno))
extern List *make_partition_pruneinfo(PlannerInfo *root, List *partition_rels,
List *subpaths, List *prunequal);
extern Relids prune_append_rel_partitions(RelOptInfo *rel);
extern Bitmapset *get_matching_partitions(PartitionPruneContext *context,
List *pruning_steps);
extern List *gen_partprune_steps(RelOptInfo *rel, List *clauses,
bool *contradictory);
#endif /* PARTPRUNE_H */
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