[BugFix] fix min/max optimization on iceberg on partition columns (backport #61858) (#61878)

Signed-off-by: yan zhang <dirtysalt1987@gmail.com>
Co-authored-by: yan zhang <dirtysalt1987@gmail.com>

be/src/exec/hdfs_scanner.cpp

@@ -237,8 +237,9 @@ Status HdfsScanner::get_next(RuntimeState* runtime_state, ChunkPtr* chunk) {
     // short circuit for min/max optimization.
     if (_scanner_ctx.can_use_min_max_optimization()) {
         // 3 means we output 3 values: min, max, and null
-        _scanner_ctx.append_or_update_min_max_column_to_chunk(chunk, 3);
-        size_t row_count = (*chunk)->num_rows();
+        const size_t row_count = 3;
+        (*chunk)->set_num_rows(row_count);
+        _scanner_ctx.append_or_update_min_max_column_to_chunk(chunk, row_count);
         _scanner_ctx.append_or_update_partition_column_to_chunk(chunk, row_count);
         _scanner_ctx.append_or_update_extended_column_to_chunk(chunk, row_count);
         _scanner_ctx.no_more_chunks = true;

test/sql/test_iceberg/R/test_iceberg_min_max_opt

@@ -324,6 +324,26 @@ None	None	None	None
 drop table ice_tbl_${uuid1} force;
 -- result:
 -- !result
+create external table ice_tbl_${uuid2}(
+    c_int int,
+    dt datetime
+) partition by (dt);
+-- result:
+-- !result
+INSERT INTO ice_tbl_${uuid2} (    
+       c_int, dt
+) VALUES
+(10, '2021-01-01 13:00:00'),
+(20, '2022-01-01 14:00:00');
+-- result:
+-- !result
+select min(dt), max(dt) from ice_tbl_${uuid2};
+-- result:
+2021-01-01 13:00:00	2022-01-01 14:00:00
+-- !result
+drop table ice_tbl_${uuid2} force;
+-- result:
+-- !result
 drop database iceberg_sql_test_${uuid0}.iceberg_db_${uuid0};
 -- result:
 -- !result

test/sql/test_iceberg/T/test_iceberg_min_max_opt

@@ -285,6 +285,21 @@ select min(c_int), max(c_int), max(c_bigint), max(c_bigint) from ice_tbl_${uuid1
 
 drop table ice_tbl_${uuid1} force;
 
+create external table ice_tbl_${uuid2}(
+    c_int int,
+    dt datetime
+) partition by (dt);
+
+INSERT INTO ice_tbl_${uuid2} (    
+       c_int, dt
+) VALUES
+(10, '2021-01-01 13:00:00'),
+(20, '2022-01-01 14:00:00');
+
+select min(dt), max(dt) from ice_tbl_${uuid2};
+
+drop table ice_tbl_${uuid2} force;
+
 drop database iceberg_sql_test_${uuid0}.iceberg_db_${uuid0};
 set catalog default_catalog;
 drop catalog iceberg_sql_test_${uuid0};