diff --git a/src/sql/engine/aggregate/ob_aggregate_processor.cpp b/src/sql/engine/aggregate/ob_aggregate_processor.cpp
index 18faec0a2f..0b6da45a44 100644
--- a/src/sql/engine/aggregate/ob_aggregate_processor.cpp
+++ b/src/sql/engine/aggregate/ob_aggregate_processor.cpp
@@ -5583,6 +5583,7 @@ int ObAggregateProcessor::get_json_arrayagg_result(const ObAggrInfo &aggr_info,
           ObObjType val_type = tmp_obj->get_type();
           ObCollationType cs_type = tmp_obj->get_collation_type();
           ObScale scale = tmp_obj->get_scale();
+          scale = (val_type == ObBitType) ? aggr_info.param_exprs_.at(0)->datum_meta_.length_semantics_ : scale;
           ObIJsonBase *json_val = NULL;
           ObDatum converted_datum;
           converted_datum.set_datum(storted_row->cells()[0]);
diff --git a/src/sql/engine/expr/ob_expr_json_func_helper.cpp b/src/sql/engine/expr/ob_expr_json_func_helper.cpp
index d783e9a387..e1d471d076 100644
--- a/src/sql/engine/expr/ob_expr_json_func_helper.cpp
+++ b/src/sql/engine/expr/ob_expr_json_func_helper.cpp
@@ -210,6 +210,7 @@ int ObJsonExprHelper::get_json_val(const ObExpr &expr, ObEvalCtx &ctx,
   } else {
     ObBasicSessionInfo *session = ctx.exec_ctx_.get_my_session();
     ObScale scale = json_arg->datum_meta_.scale_;
+    scale = (val_type == ObBitType) ? json_arg->datum_meta_.length_semantics_ : scale;
     if (OB_ISNULL(session)) {
       ret = OB_ERR_UNEXPECTED;
       LOG_WARN("session is NULL", K(ret));