greenplumn pg_partitioned_table 源码
greenplumn pg_partitioned_table 代码
文件路径：/src/include/catalog/pg_partitioned_table.h
/*-------------------------------------------------------------------------
*
* pg_partitioned_table.h
* definition of the "partitioned table" system catalog
* (pg_partitioned_table)
*
*
* Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/include/catalog/pg_partitioned_table.h
*
* NOTES
* The Catalog.pm module reads this file and derives schema
* information.
*
*-------------------------------------------------------------------------
*/
#ifndef PG_PARTITIONED_TABLE_H
#define PG_PARTITIONED_TABLE_H
#include "catalog/genbki.h"
#include "catalog/pg_partitioned_table_d.h"
/* ----------------
* pg_partitioned_table definition. cpp turns this into
* typedef struct FormData_pg_partitioned_table
* ----------------
*/
CATALOG(pg_partitioned_table,3350,PartitionedRelationId)
{
Oid partrelid; /* partitioned table oid */
char partstrat; /* partitioning strategy */
int16 partnatts; /* number of partition key columns */
Oid partdefid; /* default partition oid; InvalidOid if there
* isn't one */
/*
* variable-length fields start here, but we allow direct access to
* partattrs via the C struct. That's because the first variable-length
* field of a heap tuple can be reliably accessed using its C struct
* offset, as previous fields are all non-nullable fixed-length fields.
*/
int2vector partattrs; /* each member of the array is the attribute
* number of a partition key column, or 0 if
* the column is actually an expression */
#ifdef CATALOG_VARLEN
oidvector partclass; /* operator class to compare keys */
oidvector partcollation; /* user-specified collation for keys */
pg_node_tree partexprs; /* list of expressions in the partition key;
* one item for each zero entry in partattrs[] */
#endif
} FormData_pg_partitioned_table;
/* ----------------
* Form_pg_partitioned_table corresponds to a pointer to a tuple with
* the format of pg_partitioned_table relation.
* ----------------
*/
typedef FormData_pg_partitioned_table *Form_pg_partitioned_table;
#endif /* PG_PARTITIONED_TABLE_H */
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