test_ginpostinglist.c File Reference

#include "postgres.h"
#include "access/gin_private.h"
#include "access/ginblock.h"
#include "access/htup_details.h"
#include "fmgr.h"

Include dependency graph for test_ginpostinglist.c:

Go to the source code of this file.

Functions
	PG_FUNCTION_INFO_V1 (test_ginpostinglist)
static void	test_itemptr_pair (BlockNumber blk, OffsetNumber off, int maxsize)
Datum	test_ginpostinglist (PG_FUNCTION_ARGS)

Variables
	PG_MODULE_MAGIC

Function Documentation

PG_FUNCTION_INFO_V1()

PG_FUNCTION_INFO_V1

(

test_ginpostinglist

)

test_ginpostinglist()

Datum test_ginpostinglist

(

PG_FUNCTION_ARGS

)

Definition at line 88 of file test_ginpostinglist.c.

{
    test_itemptr_pair(0, 2, 14);
    test_itemptr_pair(0, MaxHeapTuplesPerPage, 14);
    test_itemptr_pair(MaxBlockNumber, MaxHeapTuplesPerPage, 14);
    test_itemptr_pair(MaxBlockNumber, MaxHeapTuplesPerPage, 16);
 
    PG_RETURN_VOID();
}

References MaxBlockNumber, MaxHeapTuplesPerPage, PG_RETURN_VOID, and test_itemptr_pair().

test_itemptr_pair()

static void test_itemptr_pair ( BlockNumber  blk, OffsetNumber  off, int  maxsize  )

static

Definition at line 41 of file test_ginpostinglist.c.

{
    ItemPointerData orig_itemptrs[2];
    ItemPointer decoded_itemptrs;
    GinPostingList *pl;
    int         nwritten;
    int         ndecoded;
 
    elog(NOTICE, "testing with (%u, %d), (%u, %d), max %d bytes",
         0, 1, blk, off, maxsize);
    ItemPointerSet(&orig_itemptrs[0], 0, 1);
    ItemPointerSet(&orig_itemptrs[1], blk, off);
 
    /* Encode, and decode it back */
    pl = ginCompressPostingList(orig_itemptrs, 2, maxsize, &nwritten);
    elog(NOTICE, "encoded %d item pointers to %zu bytes",
         nwritten, SizeOfGinPostingList(pl));
 
    if (SizeOfGinPostingList(pl) > maxsize)
        elog(ERROR, "overflow: result was %zu bytes, max %d",
             SizeOfGinPostingList(pl), maxsize);
 
    decoded_itemptrs = ginPostingListDecode(pl, &ndecoded);
    if (nwritten != ndecoded)
        elog(NOTICE, "encoded %d itemptrs, %d came back", nwritten, ndecoded);
 
    /* Check the result */
    if (!ItemPointerEquals(&orig_itemptrs[0], &decoded_itemptrs[0]))
        elog(ERROR, "mismatch on first itemptr: (%u, %d) vs (%u, %d)",
             0, 1,
             ItemPointerGetBlockNumber(&decoded_itemptrs[0]),
             ItemPointerGetOffsetNumber(&decoded_itemptrs[0]));
 
    if (ndecoded == 2 &&
        !ItemPointerEquals(&orig_itemptrs[0], &decoded_itemptrs[0]))
    {
        elog(ERROR, "mismatch on second itemptr: (%u, %d) vs (%u, %d)",
             0, 1,
             ItemPointerGetBlockNumber(&decoded_itemptrs[0]),
             ItemPointerGetOffsetNumber(&decoded_itemptrs[0]));
    }
}

References elog, ERROR, ginCompressPostingList(), ginPostingListDecode(), ItemPointerEquals(), ItemPointerGetBlockNumber(), ItemPointerGetOffsetNumber(), ItemPointerSet(), NOTICE, and SizeOfGinPostingList.

Referenced by test_ginpostinglist().

Variable Documentation

PG_MODULE_MAGIC

PG_MODULE_MAGIC

Definition at line 20 of file test_ginpostinglist.c.