ambuild parameters

[david.hoksza@xxxxxxxxx]

Hi, I'm trying to implement my own access method. Now I've implemented
and compiled it but I've problems when I try to use it.

I got folowing AM function definitions:

CREATE OR REPLACE FUNCTION atomrtgettuple (INTERNAL ,INT4) RETURNS BOOL
        AS 'E:\\pgsource\\postgresql-8.0.7\\contrib\\atomrtree\\libatomrtree.dll', 'atomrtgettuple' 
        LANGUAGE 'C';
        
CREATE OR REPLACE FUNCTION atomrtinsert (INTERNAL ,INTERNAL, INTERNAL, INTERNAL) RETURNS INTERNAL 
        AS 'E:\\pgsource\\postgresql-8.0.7\\contrib\\atomrtree\\libatomrtree.dll', 'atomrtinsert' 
        LANGUAGE 'C';
        
CREATE OR REPLACE FUNCTION atomrtbeginscan (INTERNAL ,INT4, INTERNAL) RETURNS INTERNAL 
        AS 'E:\\pgsource\\postgresql-8.0.7\\contrib\\atomrtree\\libatomrtree.dll', 'atomrtbeginscan' 
        LANGUAGE 'C';
        
CREATE OR REPLACE FUNCTION atomrtrescan (INTERNAL ,INTERNAL) RETURNS VOID 
        AS 'E:\\pgsource\\postgresql-8.0.7\\contrib\\atomrtree\\libatomrtree.dll', 'atomrtrescan' 
        LANGUAGE 'C';
        
CREATE OR REPLACE FUNCTION atomrtendscan (INTERNAL) RETURNS VOID 
        AS 'E:\\pgsource\\postgresql-8.0.7\\contrib\\atomrtree\\libatomrtree.dll', 'atomrtendscan' 
        LANGUAGE 'C';
        
CREATE OR REPLACE FUNCTION atomrtmarkpos (INTERNAL) RETURNS VOID 
        AS 'E:\\pgsource\\postgresql-8.0.7\\contrib\\atomrtree\\libatomrtree.dll', 'atomrtmarkpos' 
        LANGUAGE 'C';
        
CREATE OR REPLACE FUNCTION atomrtrestrpos (INTERNAL) RETURNS VOID 
        AS 'E:\\pgsource\\postgresql-8.0.7\\contrib\\atomrtree\\libatomrtree.dll', 'atomrtrestrpos' 
        LANGUAGE 'C';
        
CREATE OR REPLACE FUNCTION atomrtbuild (INTERNAL ,INTERNAL, INTERNAL) RETURNS VOID 
        AS 'E:\\pgsource\\postgresql-8.0.7\\contrib\\atomrtree\\libatomrtree.dll', 'atomrtbuild' 
        LANGUAGE 'C';
        
CREATE OR REPLACE FUNCTION atomrtbulkdelete (INTERNAL ,INTERNAL, INTERNAL) RETURNS INTERNAL 
        AS 'E:\\pgsource\\postgresql-8.0.7\\contrib\\atomrtree\\libatomrtree.dll', 'atomrtbulkdelete' 
        LANGUAGE 'C';
        
CREATE OR REPLACE FUNCTION atomrtcostestimate (INTERNAL, INTERNAL, INTERNAL, INTERNAL, INTERNAL, INTERNAL, INTERNAL, INTERNAL) RETURNS VOID 
        AS 'E:\\pgsource\\postgresql-8.0.7\\contrib\\atomrtree\\libatomrtree.dll', 'atomrtcostestimate' 
        LANGUAGE 'C';

Then I insert record into pg_am:

insert into pg_am(
        amname,
        amowner,
        amstrategies,
        amsupport,
        amorderstrategy,
        amcanunique,
        amcanmulticol,
        amindexnulls,
        amconcurrent,
        amgettuple,
        aminsert,
        ambeginscan,
        amrescan,
        amendscan,
        ammarkpos,
        amrestrpos,
        ambuild,
        ambulkdelete,
        amvacuumcleanup,
        amcostestimate)
values (
  'atomrtree',
  (select usesysid from pg_shadow where usename = current_user),
  1,
  0,
  0,
  'f',
  't',
  't',
  'f',
  'atomrtgettuple',
  'atomrtinsert',
        'atomrtbeginscan',
        'atomrtrescan',
        'atomrtendscan',
        'atomrtmarkpos',
        'atomrtrestrpos',
        'atomrtbuild',
        'atomrtbulkdelete',
        '-',
        'atomrtcostestimate'
);

And when i try to set atomrtree index (create index idx_atom1 on test
using atomrtree(col1);), I get error telling me that I can't read on
address xxxx.

The problem is in the atomrtbuild function, which fails, when I try to
work with index_relation variable, which is parameter of that function. The
fucntion seems like:

Datum
atomrtbuild(PG_FUNCTION_ARGS)
{
        Relation                        heap_rel = (Relation) PG_GETARG_POINTER(0);
        Relation                        index_rel = (Relation) PG_GETARG_POINTER(1);
        IndexInfo                       *indexInfo = (IndexInfo *) PG_GETARG_POINTER(2);
        double                          reltuples;
        AtomRTBuildState        buildstate;
        Buffer                          buffer;
        BlockNumber                     block_num;
        Page                            page;
        AtomRTreePageOpaque     page_opaque;    

        WriteToMyLog("Entering atomrtbuild");

        /* no locking is needed */

        WriteToMyLog("Before initAtomRTState");
        initAtomRTState(&buildstate.atomrtstate, index_rel);
        WriteToMyLog("After initAtomRTState");
        
        if (index_rel == NULL)
                WriteToMyLog("index_rel is null");
        else
                WriteToMyLog("index_rel is NOT null");

        WriteToMyLog("Before RelationGetNumberOfBlocks(index_rel)");
        
        if (RelationGetNumberOfBlocks(index_rel) != 0)
                elog(ERROR, "index_rel \"%s\" already contains data", 
                        RelationGetRelationName(index_rel));

And RelationGetNumberOfBlocks(index_rel) is the place, where it fails
(the index_rel variable is not null).

The same problem is, when I try to use heap_rel.

I really can't find, where's the problem. I use almost the same code
as btree or rtree does. Isn't the problem in the way I create the
functions? I mean if the parameter type INTERNAL in:
CREATE OR REPLACE FUNCTION atomrtbuild (INTERNAL ,INTERNAL, INTERNAL) RETURNS VOID
        AS 'E:\\pgsource\\postgresql-8.0.7\\contrib\\atomrtree\\libatomrtree.dll', 'atomrtbuild' 
        LANGUAGE 'C';

is OK?

I spent whole afternoon trying to change the params for OPAQUE aso.,
but nothing works:(

Thanks,
       David Hoksza