Mark Kirkwood wrote:
I'm seeing a segfault on a size TPC-H size 10 database. The patch and code are:
- bitmap patch from 12 Mar
- 8.3 dev from 27 Mar

SELECT count(distinct(o_orderkey))
FROM orders orders_alias
WHERE o_orderpriority IN ('1-URGENT', '3-MEDIUM') AND o_orderstatus='P';

(gdb) bt
#0  0x00000000 in ?? ()
#1  0x08155eb5 in bitmap_stream_free (opaque=0x84e4070) at tidbitmap.c:1336
#2  0x08142914 in ExecEndBitmapHeapScan (node=0x8405548)
    at nodeBitmapHeapscan.c:463
#3  0x0813789a in ExecutorEnd (queryDesc=0x83ed948) at execMain.c:992
#4  0x081134ef in PortalCleanup (portal=0x83ee018) at portalcmds.c:302
#5  0x0823e2d2 in PortalDrop (portal=0x83ee018, isTopCommit=0 '\0')
    at portalmem.c:382
#6  0x081b2182 in exec_simple_query (
query_string=0x83a8018 "SELECT count(distinct(o_orderkey))\nFROM orders orders_alias\nWHERE o_orderpriority IN ('1-URGENT', '3-MEDIUM') AND o_orderstatus='P';") at postgres.c:964
#7  0x081b4350 in PostgresMain (argc=4, argv=0x833a638,
    username=0x833a610 "postgres") at postgres.c:3488
#8  0x0818faab in ServerLoop () at postmaster.c:2985
#9 0x081911b1 in PostmasterMain (argc=1, argv=0xbfbfec30) at postmaster.c:967
#10 0x08153592 in main (argc=1, argv=0xbfbfec30) at main.c:188

Not a SIGSEGV but another stream related issue:

bitmap=# \d bitmaptest;
  Table "public.bitmaptest"
 Column |  Type   | Modifiers
 id     | integer | not null
 val0   | integer |
 val1   | integer |
 val2   | integer |
 fil    | text    |
    "bitmaptest_id" btree (id)
    "bitmaptest_val0" bitmap (val0)
    "bitmaptest_val1" bitmap (val1)
    "bitmaptest_val2" bitmap (val2)
bitmap=# SELECT count(*) FROM bitmaptest
           WHERE val1 in (1,7)
           AND val0 IN (4,3)

ERROR:  XX000: unknown stream type 2
LOCATION:  stream_add_node, tidbitmap.c:1033

I could not reproduce this with the TPC-H dataset, so here's a link to the files to generate this one:



---------------------------(end of broadcast)---------------------------
TIP 9: In versions below 8.0, the planner will ignore your desire to
      choose an index scan if your joining column's datatypes do not

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