hypertable_restrict_info.h

/*
 * This file and its contents are licensed under the Apache License 2.0.
 * Please see the included NOTICE for copyright information and
 * LICENSE-APACHE for a copy of the license.
 */
#pragma once

#include "hypertable.h"

typedef struct DimensionRestrictInfo
{
	const Dimension *dimension;
} DimensionRestrictInfo;

typedef struct DimensionRestrictInfoOpen
{
	DimensionRestrictInfo base;
	int64 lower_bound; /* internal time representation */
	StrategyNumber lower_strategy;
	int64 upper_bound; /* internal time representation */
	StrategyNumber upper_strategy;
} DimensionRestrictInfoOpen;

typedef struct DimensionRestrictInfoClosed
{
	DimensionRestrictInfo base;
	List *partitions;		 /* hash values */
	StrategyNumber strategy; /* either Invalid or equal */
} DimensionRestrictInfoClosed;

/* HypertableRestrictInfo represents restrictions on a hypertable. It uses
 * range exclusion logic to figure out which chunks can match the description */
typedef struct HypertableRestrictInfo
{
	/*
	 * number of base restrictions
	 * that are true everywhere inside the HRI. */
	int num_quals_proven_true_by_hri;

	int num_dimensions;

	/*
	 * Array of dimension restrictions.
	 */
	DimensionRestrictInfo *dimension_restriction[FLEXIBLE_ARRAY_MEMBER];
} HypertableRestrictInfo;

extern HypertableRestrictInfo *ts_hypertable_restrict_info_create(Hypertable *ht);

/* Add restrictions based on a List of RestrictInfo */
extern void ts_hypertable_restrict_info_add(HypertableRestrictInfo *hri, PlannerInfo *root,
											List *base_restrict_infos);

/*
 * Add a single restriction. Returns true if the clause is true everywhere inside
 * the current hypertable restrictions.
 */
extern bool ts_hypertable_restrict_info_add_clause(HypertableRestrictInfo *hri, PlannerInfo *root,
												   Expr *clause);

/* Get a list of chunk oids for chunks whose constraints match the restriction clauses */
extern Chunk **ts_hypertable_restrict_info_get_chunks(HypertableRestrictInfo *hri, Hypertable *ht,
													  bool include_osm, unsigned int *num_chunks);

extern Chunk **ts_hypertable_restrict_info_get_chunks_ordered(HypertableRestrictInfo *hri,
															  Hypertable *ht, bool include_osm,
															  Chunk **chunks, bool reverse,
															  List **nested_oids,
															  unsigned int *num_chunks);