diff options
Diffstat (limited to 'src/include/access/relscan.h')
| -rw-r--r-- | src/include/access/relscan.h | 92 |
1 files changed, 47 insertions, 45 deletions
diff --git a/src/include/access/relscan.h b/src/include/access/relscan.h index 60a2be58dea..356bcefc529 100644 --- a/src/include/access/relscan.h +++ b/src/include/access/relscan.h @@ -1,80 +1,82 @@ /*------------------------------------------------------------------------- * * relscan.h-- - * POSTGRES internal relation scan descriptor definitions. + * POSTGRES internal relation scan descriptor definitions. * * * Copyright (c) 1994, Regents of the University of California * - * $Id: relscan.h,v 1.5 1996/11/04 08:52:41 scrappy Exp $ + * $Id: relscan.h,v 1.6 1997/09/07 04:56:08 momjian Exp $ * *------------------------------------------------------------------------- */ -#ifndef RELSCAN_H +#ifndef RELSCAN_H #define RELSCAN_H #include <utils/tqual.h> #include <storage/buf.h> #include <utils/rel.h> -typedef ItemPointerData MarkData; +typedef ItemPointerData MarkData; -typedef struct HeapScanDescData { - Relation rs_rd; /* pointer to relation descriptor */ - HeapTuple rs_ptup; /* previous tuple in scan */ - HeapTuple rs_ctup; /* current tuple in scan */ - HeapTuple rs_ntup; /* next tuple in scan */ - Buffer rs_pbuf; /* previous buffer in scan */ - Buffer rs_cbuf; /* current buffer in scan */ - Buffer rs_nbuf; /* next buffer in scan */ - ItemPointerData rs_mptid; /* marked previous tid */ - ItemPointerData rs_mctid; /* marked current tid */ - ItemPointerData rs_mntid; /* marked next tid */ - ItemPointerData rs_mcd; /* marked current delta XXX ??? */ - bool rs_atend; /* restart scan at end? */ - TimeQual rs_tr; /* time qualification */ - uint16 rs_cdelta; /* current delta in chain */ - uint16 rs_nkeys; /* number of attributes in keys */ - ScanKey rs_key; /* key descriptors */ -} HeapScanDescData; +typedef struct HeapScanDescData +{ + Relation rs_rd; /* pointer to relation descriptor */ + HeapTuple rs_ptup; /* previous tuple in scan */ + HeapTuple rs_ctup; /* current tuple in scan */ + HeapTuple rs_ntup; /* next tuple in scan */ + Buffer rs_pbuf; /* previous buffer in scan */ + Buffer rs_cbuf; /* current buffer in scan */ + Buffer rs_nbuf; /* next buffer in scan */ + ItemPointerData rs_mptid; /* marked previous tid */ + ItemPointerData rs_mctid; /* marked current tid */ + ItemPointerData rs_mntid; /* marked next tid */ + ItemPointerData rs_mcd; /* marked current delta XXX ??? */ + bool rs_atend; /* restart scan at end? */ + TimeQual rs_tr; /* time qualification */ + uint16 rs_cdelta; /* current delta in chain */ + uint16 rs_nkeys; /* number of attributes in keys */ + ScanKey rs_key; /* key descriptors */ +} HeapScanDescData; typedef HeapScanDescData *HeapScanDesc; -typedef struct IndexScanDescData { - Relation relation; /* relation descriptor */ - void *opaque; /* am-specific slot */ - ItemPointerData previousItemData; /* previous index pointer */ - ItemPointerData currentItemData; /* current index pointer */ - ItemPointerData nextItemData; /* next index pointer */ - MarkData previousMarkData; /* marked previous pointer */ - MarkData currentMarkData; /* marked current pointer */ - MarkData nextMarkData; /* marked next pointer */ - uint8 flags; /* scan position flags */ - bool scanFromEnd; /* restart scan at end? */ - uint16 numberOfKeys; /* number of key attributes */ - ScanKey keyData; /* key descriptor */ -} IndexScanDescData; +typedef struct IndexScanDescData +{ + Relation relation; /* relation descriptor */ + void *opaque; /* am-specific slot */ + ItemPointerData previousItemData; /* previous index pointer */ + ItemPointerData currentItemData; /* current index pointer */ + ItemPointerData nextItemData; /* next index pointer */ + MarkData previousMarkData; /* marked previous pointer */ + MarkData currentMarkData; /* marked current pointer */ + MarkData nextMarkData; /* marked next pointer */ + uint8 flags; /* scan position flags */ + bool scanFromEnd;/* restart scan at end? */ + uint16 numberOfKeys; /* number of key attributes */ + ScanKey keyData; /* key descriptor */ +} IndexScanDescData; -typedef IndexScanDescData *IndexScanDesc; +typedef IndexScanDescData *IndexScanDesc; /* ---------------- - * IndexScanDescPtr is used in the executor where we have to - * keep track of several index scans when using several indices - * - cim 9/10/89 + * IndexScanDescPtr is used in the executor where we have to + * keep track of several index scans when using several indices + * - cim 9/10/89 * ---------------- */ -typedef IndexScanDesc *IndexScanDescPtr; +typedef IndexScanDesc *IndexScanDescPtr; /* * HeapScanIsValid -- - * True iff the heap scan is valid. + * True iff the heap scan is valid. */ -#define HeapScanIsValid(scan) PointerIsValid(scan) +#define HeapScanIsValid(scan) PointerIsValid(scan) /* * IndexScanIsValid -- - * True iff the index scan is valid. + * True iff the index scan is valid. */ #define IndexScanIsValid(scan) PointerIsValid(scan) -#endif /* RELSCAN_H */ +#endif /* RELSCAN_H */ |