mirror of https://github.com/citusdata/citus.git
65 lines
2.1 KiB
C
65 lines
2.1 KiB
C
/*-------------------------------------------------------------------------
|
|
*
|
|
* pg_dist_partition.h
|
|
* definition of the system "remote partition" relation (pg_dist_partition).
|
|
*
|
|
* This table keeps metadata on logical tables that the user requested remote
|
|
* partitioning for (smaller physical tables that we partition data to are
|
|
* handled in another system catalog).
|
|
*
|
|
* Copyright (c) 2012-2016, Citus Data, Inc.
|
|
*
|
|
*-------------------------------------------------------------------------
|
|
*/
|
|
|
|
#ifndef PG_DIST_PARTITION_H
|
|
#define PG_DIST_PARTITION_H
|
|
|
|
/* ----------------
|
|
* pg_dist_partition definition.
|
|
* ----------------
|
|
*/
|
|
typedef struct FormData_pg_dist_partition
|
|
{
|
|
Oid logicalrelid; /* logical relation id; references pg_class oid */
|
|
char partmethod; /* partition method; see codes below */
|
|
#ifdef CATALOG_VARLEN /* variable-length fields start here */
|
|
text partkey; /* partition key expression */
|
|
uint32 colocationid; /* id of the co-location group of particular table belongs to */
|
|
char repmodel; /* replication model; see codes below */
|
|
#endif
|
|
} FormData_pg_dist_partition;
|
|
|
|
/* ----------------
|
|
* Form_pg_dist_partitions corresponds to a pointer to a tuple with
|
|
* the format of pg_dist_partitions relation.
|
|
* ----------------
|
|
*/
|
|
typedef FormData_pg_dist_partition *Form_pg_dist_partition;
|
|
|
|
/* ----------------
|
|
* compiler constants for pg_dist_partitions
|
|
* ----------------
|
|
*/
|
|
#define Natts_pg_dist_partition 5
|
|
#define Anum_pg_dist_partition_logicalrelid 1
|
|
#define Anum_pg_dist_partition_partmethod 2
|
|
#define Anum_pg_dist_partition_partkey 3
|
|
#define Anum_pg_dist_partition_colocationid 4
|
|
#define Anum_pg_dist_partition_repmodel 5
|
|
|
|
/* valid values for partmethod include append, hash, and range */
|
|
#define DISTRIBUTE_BY_APPEND 'a'
|
|
#define DISTRIBUTE_BY_HASH 'h'
|
|
#define DISTRIBUTE_BY_RANGE 'r'
|
|
#define DISTRIBUTE_BY_NONE 'n'
|
|
#define REDISTRIBUTE_BY_HASH 'x'
|
|
|
|
/* valid values for repmodel are 'c' for coordinator and 's' for streaming */
|
|
#define REPLICATION_MODEL_COORDINATOR 'c'
|
|
#define REPLICATION_MODEL_STREAMING 's'
|
|
#define REPLICATION_MODEL_2PC 't'
|
|
|
|
|
|
#endif /* PG_DIST_PARTITION_H */
|