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   1 /*-------------------------------------------------------------------------
   2  *
   3  * pg_partitioned_table.h
   4  *        definition of the system "partitioned table" relation
   5  *        along with the relation's initial contents.
   6  *
   7  *
   8  * Portions Copyright (c) 1996-2017, PostgreSQL Global Development Group
   9  *
  10  * src/include/catalog/pg_partitioned_table.h
  11  *
  12  * NOTES
  13  *        the genbki.sh script reads this file and generates .bki
  14  *        information from the DATA() statements.
  15  *
  16  *-------------------------------------------------------------------------
  17  */
  18 #ifndef PG_PARTITIONED_TABLE_H
  19 #define PG_PARTITIONED_TABLE_H
  20
  21 #include "catalog/genbki.h"
  22
  23 /* ----------------
  24  *              pg_partitioned_table definition.  cpp turns this into
  25  *              typedef struct FormData_pg_partitioned_table
  26  * ----------------
  27  */
  28 #define PartitionedRelationId 3350
  29
  30 CATALOG(pg_partitioned_table,3350) BKI_WITHOUT_OIDS
  31 {
  32         Oid                     partrelid;              /* partitioned table oid */
  33         char            partstrat;              /* partitioning strategy */
  34         int16           partnatts;              /* number of partition key columns */
  35         Oid                     partdefid;              /* default partition oid; InvalidOid if there
  36                                                                  * isn't one */
  37
  38         /*
  39          * variable-length fields start here, but we allow direct access to
  40          * partattrs via the C struct.  That's because the first variable-length
  41          * field of a heap tuple can be reliably accessed using its C struct
  42          * offset, as previous fields are all non-nullable fixed-length fields.
  43          */
  44         int2vector      partattrs;              /* each member of the array is the attribute
  45                                                                  * number of a partition key column, or 0 if
  46                                                                  * the column is actually an expression */
  47
  48 #ifdef CATALOG_VARLEN
  49         oidvector       partclass;              /* operator class to compare keys */
  50         oidvector       partcollation;  /* user-specified collation for keys */
  51         pg_node_tree partexprs;         /* list of expressions in the partition key;
  52                                                                  * one item for each zero entry in partattrs[] */
  53 #endif
  54 } FormData_pg_partitioned_table;
  55
  56 /* ----------------
  57  *              Form_pg_partitioned_table corresponds to a pointer to a tuple with
  58  *              the format of pg_partitioned_table relation.
  59  * ----------------
  60  */
  61 typedef FormData_pg_partitioned_table *Form_pg_partitioned_table;
  62
  63 /* ----------------
  64  *              compiler constants for pg_partitioned_table
  65  * ----------------
  66  */
  67 #define Natts_pg_partitioned_table                              8
  68 #define Anum_pg_partitioned_table_partrelid             1
  69 #define Anum_pg_partitioned_table_partstrat             2
  70 #define Anum_pg_partitioned_table_partnatts             3
  71 #define Anum_pg_partitioned_table_partdefid             4
  72 #define Anum_pg_partitioned_table_partattrs             5
  73 #define Anum_pg_partitioned_table_partclass             6
  74 #define Anum_pg_partitioned_table_partcollation 7
  75 #define Anum_pg_partitioned_table_partexprs             8
  76
  77 #endif                                                  /* PG_PARTITIONED_TABLE_H */