fix: fix right join bug, issue 9018, add test cases

Author: lichuang

src/query/service/src/pipelines/processors/transforms/hash_join/hash_join_state_impl.rs

@@ -294,12 +294,12 @@ impl HashJoinState for JoinHashTable {
         }
 
         let rest_block = self.rest_block()?;
-        if rest_block.is_empty() {
-            return Ok(blocks.to_vec());
-        }
         let input_block = DataBlock::concat_blocks(&[blocks, &[rest_block]].concat())?;
 
         if unmatched_build_indexes.is_empty() && self.hash_join_desc.other_predicate.is_none() {
+            if input_block.is_empty() {
+                return Ok(vec![]);
+            }
             return Ok(vec![input_block]);
         }
 

tests/logictest/suites/mode/cluster/issue_9018.test

@@ -0,0 +1,17 @@
+statement ok
+DROP DATABASE IF EXISTS databend1;
+
+statement ok
+CREATE DATABASE databend1;
+
+statement ok
+USE databend1;
+
+statement ok
+CREATE TABLE t0(c0VARCHAR VARCHAR NULL, c1BOOLEAN BOOLEAN NULL, c2BOOLEAN BOOLEAN NULL);
+
+statement ok
+CREATE TABLE t1(c0INT INT64 NULL DEFAULT(-273272402), c1INT INT64 NULL);
+
+statement ok
+select 1 as count FROM t0 NATURAL RIGHT JOIN t1;