Update ExtractDataService.java

backend/src/main/java/io/dataease/service/dataset/ExtractDataService.java

@@ -119,9 +119,9 @@ public class ExtractDataService {
 
     private static final String dropTableSql = "DROP TABLE IF EXISTS TABLE_NAME;";
     private static final String shellScript = "result=`curl --location-trusted -u %s:%s -H \"label:%s\" -H \"column_separator:%s\" -H \"columns:%s\" -H \"merge_type: %s\" -T %s -XPUT http://%s:%s/api/%s/%s/_stream_load`\n" +
-            "if [ $? == 0 ] ; then\n" +
+            "if [ $? -eq 0 ] ; then\n" +
             "  failstatus=$(echo $result | grep '\"Status\": \"Fail\"')\n" +
-            "  if [[ \"$failstatus\" != \"\" ]]; then\n" +
+            "  if [ \"x${failstatus}\" != \"x\" ];then" +
             "     echo $result\n" +
             "     exit 1\n" +
             "  fi\n" +