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Commit of a *MAJOR* patch from Dan McGuirk <djm@indirect.com>

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Changes:

        * Unique index capability works using the syntax 'create unique
          index'.

        * Duplicate OID's in the system tables are removed.  I put
          little scripts called 'duplicate_oids' and 'find_oid' in
          include/catalog that help to find and remove duplicate OID's.
          I also moved 'unused_oids' from backend/catalog to
          include/catalog, since it has to be in the same directory
          as the include files in order to work.

        * The backend tries converting the name of a function or aggregate
          to all lowercase if the original name given doesn't work (mostly
          for compatibility with ODBC).

        * You can 'SELECT NULL' to your heart's content.

        * I put my _bt_updateitem fix in instead, which uses
          _bt_insertonpg so that even if the new key is so big that
          the page has to be split, everything still works.

        * All literal references to system catalog OID's have been
          replaced with references to define'd constants from the catalog
          header files.

        * I added a couple of node copy functions.  I think this was a
          preliminary attempt to get rules to work.
This commit is contained in:
Marc G. Fournier
1996-11-13 20:56:15 +00:00
parent 0cec8fe26c
commit 07a65b2255
45 changed files with 861 additions and 588 deletions
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10
src/include/access/nbtree.h
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@@ -6,7 +6,7 @@
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: nbtree.h,v 1.3 1996/11/05 10:37:08 scrappy Exp $
* $Id: nbtree.h,v 1.4 1996/11/13 20:50:32 scrappy Exp $
*
*-------------------------------------------------------------------------
*/
@@ -170,7 +170,10 @@ typedef BTStackData *BTStack;
/*
* prototypes for functions in nbtinsert.c
*/
extern InsertIndexResult _bt_doinsert(Relation rel, BTItem btitem);
extern InsertIndexResult _bt_doinsert(Relation rel, BTItem btitem,
bool index_is_unique, bool is_update);
/* default is to allow duplicates */
extern bool _bt_itemcmp(Relation rel, Size keysz, BTItem item1, BTItem item2,
StrategyNumber strat);
@@ -200,7 +203,7 @@ extern void btbuild(Relation heap, Relation index, int natts,
AttrNumber *attnum, IndexStrategy istrat, uint16 pcount,
Datum *params, FuncIndexInfo *finfo, PredInfo *predInfo);
extern InsertIndexResult btinsert(Relation rel, Datum *datum, char *nulls,
ItemPointer ht_ctid);
ItemPointer ht_ctid, bool is_update);
extern char *btgettuple(IndexScanDesc scan, ScanDirection dir);
extern char *btbeginscan(Relation rel, bool fromEnd, uint16 keysz,
ScanKey scankey);
@@ -237,6 +240,7 @@ extern OffsetNumber _bt_binsrch(Relation rel, Buffer buf, int keysz,
extern RetrieveIndexResult _bt_next(IndexScanDesc scan, ScanDirection dir);
extern RetrieveIndexResult _bt_first(IndexScanDesc scan, ScanDirection dir);
extern bool _bt_step(IndexScanDesc scan, Buffer *bufP, ScanDirection dir);
extern int _bt_compare(Relation rel, TupleDesc itupdesc, Page page, int keysz, ScanKey scankey, OffsetNumber offnum);
/*
* prototypes for functions in nbtstrat.c