diff options
Diffstat (limited to 'src/include/utils/tuplestore.h')
| -rw-r--r-- | src/include/utils/tuplestore.h | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/src/include/utils/tuplestore.h b/src/include/utils/tuplestore.h index 37f99fea3bd..3fe32f682b1 100644 --- a/src/include/utils/tuplestore.h +++ b/src/include/utils/tuplestore.h @@ -11,6 +11,8 @@ * before it has all been written. This is particularly useful for cursors, * because it allows random access within the already-scanned portion of * a query without having to process the underlying scan to completion. + * Also, it is possible to support multiple independent read pointers. + * * A temporary file is used to handle the data if it exceeds the * space limit specified by the caller. * @@ -22,7 +24,7 @@ * Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $PostgreSQL: pgsql/src/include/utils/tuplestore.h,v 1.23 2008/03/25 19:26:53 neilc Exp $ + * $PostgreSQL: pgsql/src/include/utils/tuplestore.h,v 1.24 2008/10/01 19:51:50 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -57,16 +59,21 @@ extern void tuplestore_putvalues(Tuplestorestate *state, TupleDesc tdesc, /* tuplestore_donestoring() used to be required, but is no longer used */ #define tuplestore_donestoring(state) ((void) 0) +extern int tuplestore_alloc_read_pointer(Tuplestorestate *state, int eflags); + +extern void tuplestore_select_read_pointer(Tuplestorestate *state, int ptr); + +extern void tuplestore_copy_read_pointer(Tuplestorestate *state, + int srcptr, int destptr); + extern bool tuplestore_gettupleslot(Tuplestorestate *state, bool forward, TupleTableSlot *slot); extern bool tuplestore_advance(Tuplestorestate *state, bool forward); -extern void tuplestore_end(Tuplestorestate *state); - extern bool tuplestore_ateof(Tuplestorestate *state); extern void tuplestore_rescan(Tuplestorestate *state); -extern void tuplestore_markpos(Tuplestorestate *state); -extern void tuplestore_restorepos(Tuplestorestate *state); + +extern void tuplestore_end(Tuplestorestate *state); #endif /* TUPLESTORE_H */ |