diff options
Diffstat (limited to 'src/include/utils')
| -rw-r--r-- | src/include/utils/rel.h | 3 | ||||
| -rw-r--r-- | src/include/utils/tuplestore.h | 60 |
2 files changed, 61 insertions, 2 deletions
diff --git a/src/include/utils/rel.h b/src/include/utils/rel.h index 2a585c0e7ea..901020611ac 100644 --- a/src/include/utils/rel.h +++ b/src/include/utils/rel.h @@ -7,7 +7,7 @@ * Portions Copyright (c) 1996-2000, PostgreSQL, Inc * Portions Copyright (c) 1994, Regents of the University of California * - * $Id: rel.h,v 1.37 2000/06/17 21:49:02 tgl Exp $ + * $Id: rel.h,v 1.38 2000/06/18 22:44:34 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -90,7 +90,6 @@ typedef struct RelationData uint16 rd_refcnt; /* reference count */ bool rd_myxactonly; /* rel uses the local buffer mgr */ bool rd_isnailed; /* rel is nailed in cache */ - bool rd_isnoname; /* rel has no name */ bool rd_unlinked; /* rel already unlinked or not created yet */ bool rd_indexfound; /* true if rd_indexlist is valid */ Form_pg_am rd_am; /* AM tuple */ diff --git a/src/include/utils/tuplestore.h b/src/include/utils/tuplestore.h new file mode 100644 index 00000000000..702d3b73c91 --- /dev/null +++ b/src/include/utils/tuplestore.h @@ -0,0 +1,60 @@ +/*------------------------------------------------------------------------- + * + * tuplestore.h + * Generalized routines for temporary tuple storage. + * + * This module handles temporary storage of tuples for purposes such + * as Materialize nodes, hashjoin batch files, etc. It is essentially + * a dumbed-down version of tuplesort.c; it does no sorting of tuples + * but can only store a sequence of tuples and regurgitate it later. + * A temporary file is used to handle the data if it exceeds the + * space limit specified by the caller. + * + * Portions Copyright (c) 1996-2000, PostgreSQL, Inc + * Portions Copyright (c) 1994, Regents of the University of California + * + * $Id: tuplestore.h,v 1.1 2000/06/18 22:44:35 tgl Exp $ + * + *------------------------------------------------------------------------- + */ +#ifndef TUPLESTORE_H +#define TUPLESTORE_H + +#include "access/htup.h" + +/* Tuplestorestate is an opaque type whose details are not known outside + * tuplestore.c. + */ +typedef struct Tuplestorestate Tuplestorestate; + +/* + * Currently we only need to store HeapTuples, but it would be easy + * to support the same behavior for IndexTuples and/or bare Datums. + */ + +extern Tuplestorestate *tuplestore_begin_heap(bool randomAccess, + int maxKBytes); + +extern void tuplestore_puttuple(Tuplestorestate *state, void *tuple); + +extern void tuplestore_donestoring(Tuplestorestate *state); + +extern void *tuplestore_gettuple(Tuplestorestate *state, bool forward, + bool *should_free); + +#define tuplestore_getheaptuple(state, forward, should_free) \ + ((HeapTuple) tuplestore_gettuple(state, forward, should_free)) + +extern void tuplestore_end(Tuplestorestate *state); + +/* + * These routines may only be called if randomAccess was specified 'true'. + * Likewise, backwards scan in gettuple/getdatum is only allowed if + * randomAccess was specified. + */ + +extern void tuplestore_rescan(Tuplestorestate *state); +extern void tuplestore_markpos(Tuplestorestate *state); +extern void tuplestore_restorepos(Tuplestorestate *state); + +#endif /* TUPLESTORE_H */ |