Problems with + 1 million record table

[13236.470]                 ------------------------------------------------------------
[13236.470]                 hdbc=02DE3008, stmt=02C7B1A8, result=02C791D0
[13236.470]                 prepare=0, internal=0
[13236.470]                 bindings=32090580, bindings_allocated=20
[13236.470]                 parameters=00000000, parameters_allocated=0
[13236.470]                 statement_type=0, statement='select

a_teste_nestle."CODCLI",

a_teste_nestle."CODFAB",

a_teste_nestle."CODFAMILIANESTLE",

a_teste_nestle."CODFILIAL",

a_teste_nestle."CODGRUPONESTLE",

a_teste_nestle."CODSUBGRUPONESTLE",

a_teste_nestle."CONDVENDA",

a_teste_nestle."DATA",

a_teste_nestle."DESCRICAO",

a_teste_nestle."PESO",

a_teste_nestle."PRACA",

a_teste_nestle."PUNIT",

a_teste_nestle."PVENDA",

a_teste_nestle."QT",

a_teste_nestle."QTITVENDIDOS",

a_teste_nestle."QTPESOPREV",

a_teste_nestle."QTVENDAPREV",

a_teste_nestle."SUPERVISOR",

a_teste_nestle."VENDEDOR",

a_teste_nestle."VLVENDAPREV"

from a_teste_nestle

'
[13236.486]                 stmt_with_params='select
a_teste_nestle."CODCLI",
a_teste_nestle."CODFAB",
a_teste_nestle."CODFAMILIANESTLE",
a_teste_nestle."CODFILIAL",
a_teste_nestle."CODGRUPONESTLE",
a_teste_nestle."CODSUBGRUPONESTLE",
a_teste_nestle."CONDVENDA",
a_teste_nestle."DATA",
a_teste_nestle."DESCRICAO",
a_teste_nestle."PESO",
a_teste_nestle."PRACA",
a_teste_nestle."PUNIT",
a_teste_nestle."PVENDA",
a_teste_nestle."QT",
a_teste_nestle."QTITVENDIDOS",
a_teste_nestle."QTPESOPREV",
a_teste_nestle."QTVENDAPREV",
a_teste_nestle."SUPERVISOR",
a_teste_nestle."VENDEDOR",
a_teste_nestle."VLVENDAPREV"
from a_teste_nestle

'
[13236.486]                 data_at_exec=-1, current_exec_param=-1, put_data=0
[13236.501]                 currTuple=-1, current_col=-1, lobj_fd=-1
[13236.501]                 maxRows=0, rowset_size=1, keyset_size=0, cursor_type=0, scroll_concurrency=1
[13236.501]                 cursor_name='SQL_CUR02C7B1A8'
[13236.501]                 ----------------QResult Info -------------------------------
[13236.501]                 fields=02C7C9B8, backend_tuples=00000000, tupleField=0, conn=02DE3008
[13236.501]                 fetch_count=0, num_total_rows=819200, num_fields=20, cursor='(NULL)'
[13236.501]                 message='Out of memory while reading tuples.', command='(NULL)', notice='(NULL)'
[13236.501]                 status=7, inTuples=1
[13236.501]CONN ERROR: func=SC_execute, desc='(null)', errnum=109, errmsg='Out of memory while reading tuples.'
[13236.517]            ------------------------------------------------------------
[13236.517]            henv=02C727B8, conn=02DE3008, status=1, num_stmts=16
[13236.517]            sock=02DD3120, stmts=02DD8EE8, lobj_type=17288
[13236.517]            ---------------- Socket Info -------------------------------
[13236.517]            socket=512, reverse=0, errornumber=0, errormsg='(NULL)'
[13236.517]            buffer_in=46642688, buffer_out=46633712
[13236.517]            buffer_filled_in=4096, buffer_filled_out=0, buffer_read_in=3426
[63860.095]conn=02DE3008, PGAPI_Disconnect
[63880.251]conn=02C73A78, PGAPI_Disconnect

POSTGRESQL.CONF:

#---------------------------------------------------------------------------
# RESOURCE USAGE (except WAL)
#---------------------------------------------------------------------------

# - Memory -

shared_buffers = 512MB   # min 128kB or max_connections*16kB
     # (change requires restart)
temp_buffers = 32MB   # min 800kB
#max_prepared_transactions = 5  # can be 0 or more
     # (change requires restart)
# Note: increasing max_prepared_transactions costs ~600 bytes of shared memory
# per transaction slot, plus lock space (see max_locks_per_transaction).
work_mem = 256MB    # min 64kB
maintenance_work_mem = 128MB  # min 1MB
#max_stack_depth = 2MB   # min 100kB

# - Free Space Map -

max_fsm_pages = 409600  # min max_fsm_relations*16, 6 bytes each
     # (change requires restart)
#max_fsm_relations = 1000  # min 100, ~70 bytes each
     # (change requires restart)