An Impala query fails with error "ERROR: IllegalStateException: null"

create table tab1( tdate decimal(10,0) )
   partitioned by (p_tdate int);
 
select
   *
from
   (SELECT
       t.*
FROM
tab1 t
INNER JOIN
(SELECT 20191004 tdate ) d
WHERE
t.p_tdate < d.tdate
) q
where
   p_tdate <> tdate
   and P_TDATE = 20191004;

W1007 10:04:42.954334 1945974 Expr.java:1075] Not able to analyze after rewrite:
org.apache.impala.common.AnalysisException: Column/field reference is ambiguous: 'tdate' conjuncts: BinaryPredicate{op=!=, NumericLiteral{value=20191004, type=BIGINT} CastExpr{isImplicit=true, target=BIGINT, SlotRef{path=tdate, type=DECIMAL(10,0), id=1}}} BinaryPredicate{op==, SlotRef{path=p_tdate, type=INT, id=2} NumericLiteral{value=20191004, type=INT}}