diff --git a/plugin-rdbms-util/src/main/java/com/alibaba/datax/plugin/rdbms/reader/util/SingleTableSplitUtil.java b/plugin-rdbms-util/src/main/java/com/alibaba/datax/plugin/rdbms/reader/util/SingleTableSplitUtil.java
index d9846b39..450f545e 100755
--- a/plugin-rdbms-util/src/main/java/com/alibaba/datax/plugin/rdbms/reader/util/SingleTableSplitUtil.java
+++ b/plugin-rdbms-util/src/main/java/com/alibaba/datax/plugin/rdbms/reader/util/SingleTableSplitUtil.java
@@ -282,8 +282,8 @@ public class SingleTableSplitUtil {
         String pkRangeSQL = String.format(minMaxTemplate, splitPK, splitPK,
                 table);
         if (StringUtils.isNotBlank(where)) {
-            pkRangeSQL = String.format("%s WHERE (%s AND %s IS NOT NULL)",
-                    pkRangeSQL, where, splitPK);
+            pkRangeSQL = String.format("%s WHERE (%s)",
+                    pkRangeSQL, where);
         }
         return pkRangeSQL;
     }
@@ -387,4 +387,4 @@ public class SingleTableSplitUtil {
         }
         return rangeSql;
     }
-}
\ No newline at end of file
+}