mirror of https://github.com/citusdata/citus.git
73 lines
2.4 KiB
C
73 lines
2.4 KiB
C
/*-------------------------------------------------------------------------
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*
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* pg_dist_partition.h
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* definition of the system "remote partition" relation (pg_dist_partition).
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*
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* This table keeps metadata on logical tables that the user requested remote
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* partitioning for (smaller physical tables that we partition data to are
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* handled in another system catalog).
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*
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* Copyright (c) Citus Data, Inc.
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef PG_DIST_PARTITION_H
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#define PG_DIST_PARTITION_H
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/* ----------------
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* pg_dist_partition definition.
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* ----------------
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*/
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typedef struct FormData_pg_dist_partition
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{
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Oid logicalrelid; /* logical relation id; references pg_class oid */
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char partmethod; /* partition method; see codes below */
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#ifdef CATALOG_VARLEN /* variable-length fields start here */
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text partkey; /* partition key expression */
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uint32 colocationid; /* id of the co-location group of particular table belongs to */
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char repmodel; /* replication model; see codes below */
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#endif
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bool autoconverted;
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} FormData_pg_dist_partition;
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/* ----------------
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* Form_pg_dist_partitions corresponds to a pointer to a tuple with
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* the format of pg_dist_partitions relation.
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* ----------------
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*/
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typedef FormData_pg_dist_partition *Form_pg_dist_partition;
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/* ----------------
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* compiler constants for pg_dist_partitions
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* ----------------
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*/
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#define Natts_pg_dist_partition 6
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#define Anum_pg_dist_partition_logicalrelid 1
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#define Anum_pg_dist_partition_partmethod 2
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#define Anum_pg_dist_partition_partkey 3
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#define Anum_pg_dist_partition_colocationid 4
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#define Anum_pg_dist_partition_repmodel 5
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#define Anum_pg_dist_partition_autoconverted 6
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/* valid values for partmethod include append, hash, and range */
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#define DISTRIBUTE_BY_APPEND 'a'
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#define DISTRIBUTE_BY_HASH 'h'
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#define DISTRIBUTE_BY_RANGE 'r'
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#define DISTRIBUTE_BY_NONE 'n'
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#define REDISTRIBUTE_BY_HASH 'x'
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#define DISTRIBUTE_BY_INVALID '\0'
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/*
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* Valid values for repmodel are 'c' for coordinator, 's' for streaming
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* and 't' for two-phase-commit. We also use an invalid replication model
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* ('i') for distinguishing uninitialized variables where necessary.
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*/
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#define REPLICATION_MODEL_COORDINATOR 'c'
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#define REPLICATION_MODEL_STREAMING 's'
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#define REPLICATION_MODEL_2PC 't'
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#define REPLICATION_MODEL_INVALID 'i'
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#endif /* PG_DIST_PARTITION_H */
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