Re: [BUGS] uniqueness not always correct - Mailing list pgsql-bugs

> Frank Cusack wrote:
> >
> > Solaris 2.6/sparc; postgres 6.5.1
> >
> > dns=> create table test (zone int4, net cidr, unique(zone, net));
> > NOTICE:  CREATE TABLE/UNIQUE will create implicit index 'test_zone_key' for table 'test'
> > CREATE
> > dns=> insert into test (zone, net) values (1, '1.2.3/24');
> > INSERT 21750 1
> > dns=> insert into test (zone, net) values (1, '2.3.4/24');
> > INSERT 21751 1
> > dns=> insert into test (zone, net) values (1, '1.2.3/24');
> > INSERT 21752 1
> > dns=> insert into test (zone, net) values (1, '2.3.4/24');
> > ERROR:  Cannot insert a duplicate key into a unique index
>
> Yes, I reproduced this (Solaris 2.5/sparc).
> Seems like CIDR problem(??!):

I see a more serious problem in the current source tree:

    test=> create table test (zone int4, net cidr, unique(zone, net));
    NOTICE:  CREATE TABLE/UNIQUE will create implicit index 'test_zone_key' for table 'test'
    CREATE
    test=> insert into test (zone, net) values (1, '1.2.3/24');
    ERROR:  fmgr_info: function 0: cache lookup failed

Seems something is broken with CIDR, but not INET:

    test=> create table test2 (x inet unique(x));
    ERROR:  parser: parse error at or near "("
    test=> create table test2 (x inet, unique(x));
    NOTICE:  CREATE TABLE/UNIQUE will create implicit index 'test2_x_key' for table 'test2'
    CREATE
    test=> insert into test2 values ('1.2.3.4/24');
    INSERT 19180 1
    test=> create table test3 (x cidr, unique(x));
    NOTICE:  CREATE TABLE/UNIQUE will create implicit index 'test3_x_key' for table 'test3'
    CREATE
    test=> insert into test3 values ('1.2.3.4/24');
    ERROR:  fmgr_info: function 0: cache lookup failed

The problem appears to be in _bt_mkscankey() and index_getprocid().

Any ideas?

Backtrace shows:

---------------------------------------------------------------------------

#0  elog (lev=-1, fmt=0x817848e "fmgr_info: function %u: cache lookup failed")
    at elog.c:94
#1  0x8135a47 in fmgr_info (procedureId=0, finfo=0x830a060) at fmgr.c:225
#2  0x80643f9 in ScanKeyEntryInitialize (entry=0x830a058, flags=0,
    attributeNumber=2, procedure=0, argument=137404148) at scankey.c:65
#3  0x8083e70 in _bt_mkscankey (rel=0x8312230, itup=0x8309ee8) at nbtutils.c:56
#4  0x8079989 in _bt_doinsert (rel=0x8312230, btitem=0x8309ee8,
    index_is_unique=1 '\001', heapRel=0x82dfd38) at nbtinsert.c:52
#5  0x807eabe in btinsert (rel=0x8312230, datum=0x8309b28,
    nulls=0x830a020 "  ", ht_ctid=0x8309e2c, heapRel=0x82dfd38) at nbtree.c:358
#6  0x81358d8 in fmgr_c (finfo=0x80476e8, values=0x80476f8,
    isNull=0x80476df "") at fmgr.c:146
#7  0x8135c25 in fmgr (procedureId=331) at fmgr.c:336
#8  0x8073c6d in index_insert (relation=0x8312230, datum=0x8309b28,
    nulls=0x830a020 "  ", heap_t_ctid=0x8309e2c, heapRel=0x82dfd38)
    at indexam.c:211
#9  0x80ae3d9 in ExecInsertIndexTuples (slot=0x8309bf8, tupleid=0x8309e2c,
    estate=0x8309950, is_update=0) at execUtils.c:1206
#10 0x80aa77e in ExecAppend (slot=0x8309bf8, tupleid=0x0, estate=0x8309950)
    at execMain.c:1178
#11 0x80aa60e in ExecutePlan (estate=0x8309950, plan=0x83098b0,
    operation=CMD_INSERT, offsetTuples=0, numberTuples=0,
    direction=ForwardScanDirection, destfunc=0x817cdc4) at execMain.c:1024


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