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pg_amproc.h
/*------------------------------------------------------------------------- * * pg_amproc.h * definition of the "access method procedure" system catalog (pg_amproc) * * The amproc table identifies support procedures associated with index * operator families and classes. These procedures can't be listed in pg_amop * since they are not the implementation of any indexable operator. * * The primary key for this table is <amprocfamily, amproclefttype, * amprocrighttype, amprocnum>. The "default" support functions for a * particular opclass within the family are those with amproclefttype = * amprocrighttype = opclass's opcintype. These are the ones loaded into the * relcache for an index and typically used for internal index operations. * Other support functions are typically used to handle cross-type indexable * operators with oprleft/oprright matching the entry's amproclefttype and * amprocrighttype. The exact behavior depends on the index AM, however, and * some don't pay attention to non-default functions at all. * * * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * * src/include/catalog/pg_amproc.h * * NOTES * The Catalog.pm module reads this file and derives schema * information. * *------------------------------------------------------------------------- */ #ifndef PG_AMPROC_H #define PG_AMPROC_H #include "catalog/genbki.h" #include "catalog/pg_amproc_d.h" /* ---------------- * pg_amproc definition. cpp turns this into * typedef struct FormData_pg_amproc * ---------------- */ CATALOG(pg_amproc,2603,AccessMethodProcedureRelationId) { Oid oid; /* oid */ /* the index opfamily this entry is for */ Oid amprocfamily BKI_LOOKUP(pg_opfamily); /* procedure's left input data type */ Oid amproclefttype BKI_LOOKUP(pg_type); /* procedure's right input data type */ Oid amprocrighttype BKI_LOOKUP(pg_type); /* support procedure index */ int16 amprocnum; /* OID of the proc */ regproc amproc BKI_LOOKUP(pg_proc); } FormData_pg_amproc; /* ---------------- * Form_pg_amproc corresponds to a pointer to a tuple with * the format of pg_amproc relation. * ---------------- */ typedef FormData_pg_amproc *Form_pg_amproc; #endif /* PG_AMPROC_H */