diff --git a/core/backend/src/main/java/io/dataease/dto/datasource/Db2Configuration.java b/core/backend/src/main/java/io/dataease/dto/datasource/Db2Configuration.java
index 13a67421c9..5b7ea7d612 100644
--- a/core/backend/src/main/java/io/dataease/dto/datasource/Db2Configuration.java
+++ b/core/backend/src/main/java/io/dataease/dto/datasource/Db2Configuration.java
@@ -14,11 +14,19 @@ public class Db2Configuration extends JdbcConfiguration {
 
     public String getJdbc() {
         if(StringUtils.isEmpty(extraParams.trim())){
-            return "jdbc:db2://HOSTNAME:PORT/DATABASE:currentSchema=SCHEMA;"
-                    .replace("HOSTNAME", getHost().trim())
-                    .replace("PORT", getPort().toString().trim())
-                    .replace("DATABASE", getDataBase().trim()
-                    .replace("SCHEMA",getSchema().trim()));
+            if (StringUtils.isEmpty(getSchema())) {
+                return "jdbc:db2://HOSTNAME:PORT/DATABASE:currentSchema=SCHEMA;"
+                        .replace("HOSTNAME", getHost().trim())
+                        .replace("PORT", getPort().toString().trim())
+                        .replace("DATABASE", getDataBase().trim());
+            } else {
+                return "jdbc:db2://HOSTNAME:PORT/DATABASE:currentSchema=SCHEMA;"
+                        .replace("HOSTNAME", getHost().trim())
+                        .replace("PORT", getPort().toString().trim())
+                        .replace("DATABASE", getDataBase().trim())
+                        .replace("SCHEMA", getSchema().trim());
+            }
+
         }else {
             return "jdbc:hive2://HOSTNAME:PORT/DATABASE?EXTRA_PARAMS"
                     .replace("HOSTNAME", getHost().trim())
diff --git a/core/backend/src/main/java/io/dataease/provider/query/ck/CKQueryProvider.java b/core/backend/src/main/java/io/dataease/provider/query/ck/CKQueryProvider.java
index bd791c3563..18b8ed35d8 100644
--- a/core/backend/src/main/java/io/dataease/provider/query/ck/CKQueryProvider.java
+++ b/core/backend/src/main/java/io/dataease/provider/query/ck/CKQueryProvider.java
@@ -31,11 +31,9 @@ import org.stringtemplate.v4.STGroup;
 import org.stringtemplate.v4.STGroupFile;
 
 import javax.annotation.Resource;
-import java.text.Format;
 import java.text.MessageFormat;
 import java.text.SimpleDateFormat;
 import java.util.*;
-import java.util.concurrent.atomic.AtomicReference;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 import java.util.stream.Collectors;
@@ -1415,6 +1413,11 @@ public class CKQueryProvider extends QueryProvider {
         }
     }
 
+    @Override
+    public String sqlForPreview(String table, Datasource ds) {
+        return "SELECT * FROM " +  String.format(CKConstants.KEYWORD_TABLE, table);
+    }
+
     public List<Dateformat> dateformat() {
         return JSONArray.parseArray("[\n" +
                 "{\"dateformat\": \"%Y%m%d\"},\n" +
diff --git a/core/backend/src/main/java/io/dataease/service/dataset/ExtractDataService.java b/core/backend/src/main/java/io/dataease/service/dataset/ExtractDataService.java
index 594b0479dd..ea634adeb7 100644
--- a/core/backend/src/main/java/io/dataease/service/dataset/ExtractDataService.java
+++ b/core/backend/src/main/java/io/dataease/service/dataset/ExtractDataService.java
@@ -211,7 +211,7 @@ public class ExtractDataService {
                         for (DatasetTableField oldField : oldFields) {
                             boolean delete = true;
                             for (DatasetTableField datasetTableField : datasetTableFields) {
-                                if (oldField.getDataeaseName().equalsIgnoreCase(datasetTableField.getDataeaseName())) {
+                                if (oldField.getDataeaseName().equalsIgnoreCase(datasetTableField.getDataeaseName()) && oldField.getType().equalsIgnoreCase(datasetTableField.getType())) {
                                     delete = false;
                                 }
                             }
diff --git a/extensions/dataease-extensions-datasource/kylin/kylinDriver/activation-1.1.1.jar b/extensions/dataease-extensions-datasource/kylin/kylinDriver/activation-1.1.1.jar
new file mode 100644
index 0000000000..1b703ab283
Binary files /dev/null and b/extensions/dataease-extensions-datasource/kylin/kylinDriver/activation-1.1.1.jar differ
diff --git a/extensions/dataease-extensions-datasource/kylin/kylinDriver/jaxb-api-2.3.0.jar b/extensions/dataease-extensions-datasource/kylin/kylinDriver/jaxb-api-2.3.0.jar
new file mode 100644
index 0000000000..0817c083ad
Binary files /dev/null and b/extensions/dataease-extensions-datasource/kylin/kylinDriver/jaxb-api-2.3.0.jar differ
diff --git a/extensions/dataease-extensions-datasource/kylin/kylinDriver/jaxb-core-2.3.0.jar b/extensions/dataease-extensions-datasource/kylin/kylinDriver/jaxb-core-2.3.0.jar
new file mode 100644
index 0000000000..864ba31156
Binary files /dev/null and b/extensions/dataease-extensions-datasource/kylin/kylinDriver/jaxb-core-2.3.0.jar differ
diff --git a/extensions/dataease-extensions-datasource/kylin/kylinDriver/jaxb-impl-2.3.0.jar b/extensions/dataease-extensions-datasource/kylin/kylinDriver/jaxb-impl-2.3.0.jar
new file mode 100644
index 0000000000..02f50ab5e6
Binary files /dev/null and b/extensions/dataease-extensions-datasource/kylin/kylinDriver/jaxb-impl-2.3.0.jar differ