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| author | Jan Wieck <JanWieck@Yahoo.com> | 2000-07-22 11:18:47 +0000 |
|---|---|---|
| committer | Jan Wieck <JanWieck@Yahoo.com> | 2000-07-22 11:18:47 +0000 |
| commit | f67e79045d10bc6dbf91b213546944892d8035a0 (patch) | |
| tree | 67655039ed68a5eb8351162f913f691ee1a09a6a /src/include | |
| parent | a5a12887a15449ec5a19915c21611ae5006c5361 (diff) | |
| download | postgresql-f67e79045d10bc6dbf91b213546944892d8035a0.tar.gz | |
2nd try for the index tuple toast hack. This time as suggested
by Tom.
Jan
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/access/tuptoaster.h | 43 |
1 files changed, 29 insertions, 14 deletions
diff --git a/src/include/access/tuptoaster.h b/src/include/access/tuptoaster.h index a84df07c68..91149f5f83 100644 --- a/src/include/access/tuptoaster.h +++ b/src/include/access/tuptoaster.h @@ -6,7 +6,7 @@ * * Copyright (c) 2000, PostgreSQL Development Team * - * $Id: tuptoaster.h,v 1.6 2000/07/21 10:31:31 wieck Exp $ + * $Id: tuptoaster.h,v 1.7 2000/07/22 11:18:47 wieck Exp $ * *------------------------------------------------------------------------- */ @@ -20,13 +20,7 @@ #include "access/tupmacs.h" #include "utils/rel.h" -/* - * DO NOT ENABLE THIS - * until we have crash safe file versioning and you've - * changed VACUUM to recreate indices that use possibly - * toasted values. 2000/07/20 Jan - */ -#undef TOAST_INDICES +#define TOAST_INDEX_HACK #define TOAST_MAX_CHUNK_SIZE ((MaxTupleSize - \ @@ -37,15 +31,36 @@ MAXALIGN(VARHDRSZ))) / 4) -#ifdef TOAST_INDICES +/* ---------- + * heap_tuple_toast_attrs() - + * + * Called by heap_insert(), heap_update() and heap_delete(). + * Outdates not any longer needed toast entries referenced + * by oldtup and creates new ones until newtup is smaller + * that ~2K (or running out of toastable values). + * Possibly modifies newtup by replacing the t_data part! + * ---------- + */ extern void heap_tuple_toast_attrs(Relation rel, HeapTuple newtup, HeapTuple oldtup); -#else -extern void heap_tuple_toast_attrs(Relation rel, - HeapTuple newtup, HeapTuple oldtup, - HeapTupleHeader *plaintdata, int32 *plaintlen); -#endif +/* ---------- + * heap_tuple_fetch_attr() - + * + * Fetches an external stored attribute from the toast + * relation. Does NOT decompress it, if stored external + * in compressed format. + * ---------- + */ +extern varattrib *heap_tuple_fetch_attr(varattrib * attr); + +/* ---------- + * heap_tuple_untoast_attr() - + * + * Fully detoasts one attribute, fetching and/or decompressing + * it as needed. + * ---------- + */ extern varattrib *heap_tuple_untoast_attr(varattrib * attr); #endif /* TUPLE_TOASTER_ACTIVE */ |