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/*-------------------------------------------------------------------------
*
* partdesc.h
*
* Copyright (c) 1996-2021, PostgreSQL Global Development Group
*
* src/include/partitioning/partdesc.h
*
*-------------------------------------------------------------------------
*/
#ifndef PARTDESC_H
#define PARTDESC_H
#include "partitioning/partdefs.h"
#include "utils/relcache.h"
/*
* Information about partitions of a partitioned table.
*
* For partitioned tables where detached partitions exist, we only cache
* descriptors that include all partitions, including detached; when we're
* requested a descriptor without the detached partitions, we create one
* afresh each time. (The reason for this is that the set of detached
* partitions that are visible to each caller depends on the snapshot it has,
* so it's pretty much impossible to evict a descriptor from cache at the
* right time.)
*/
typedef struct PartitionDescData
{
int nparts; /* Number of partitions */
bool detached_exist; /* Are there any detached partitions? */
Oid *oids; /* Array of 'nparts' elements containing
* partition OIDs in order of the their bounds */
bool *is_leaf; /* Array of 'nparts' elements storing whether
* the corresponding 'oids' element belongs to
* a leaf partition or not */
PartitionBoundInfo boundinfo; /* collection of partition bounds */
} PartitionDescData;
extern PartitionDesc RelationGetPartitionDesc(Relation rel, bool omit_detached);
extern PartitionDirectory CreatePartitionDirectory(MemoryContext mcxt, bool omit_detached);
extern PartitionDesc PartitionDirectoryLookup(PartitionDirectory, Relation);
extern void DestroyPartitionDirectory(PartitionDirectory pdir);
extern Oid get_default_oid_from_partdesc(PartitionDesc partdesc);
#endif /* PARTCACHE_H */
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