diff --git a/src/main/java/org/gcube/dataaccess/databases/sampler/Sampler.java b/src/main/java/org/gcube/dataaccess/databases/sampler/Sampler.java
index c3015c9..4f61fc3 100644
--- a/src/main/java/org/gcube/dataaccess/databases/sampler/Sampler.java
+++ b/src/main/java/org/gcube/dataaccess/databases/sampler/Sampler.java
@@ -927,10 +927,10 @@ public class Sampler {
 				// the full name equal to "schemaname.tablename"
 				String tableName = "";
 				tableName = schemaName + "." + "\"" + tablename + "\"";
-
-				query = String.format(
+				
+                query = String.format(
 						queryForSmartSampleWithThresholdOnTablePostgres,
-						listAttributes, tablename, indexes[i]);
+						listAttributes, tableName, indexes[i]);
 			}
 
 			// build the query for database mysql
@@ -938,10 +938,10 @@ public class Sampler {
 				// the full name equal to "dbname.tablename"
 				String tableName = "";
 				tableName = schemaName + "." + tablename;
-
+           
 				query = String.format(
 						queryForSmartSampleWithThresholdOnTableMysql,
-						listAttributes, tablename, indexes[i]);
+						listAttributes, tableName, indexes[i]);
 			}
 
 			AnalysisLogger.getLogger().debug(