diff --git a/procedures/query/initBackReference.sql b/procedures/query/initBackReference.sql
index 4c2c95dc01b84cc80d51e3939b75962934b18f65..47038ad4c13fc934e0d9820eed27028ff848e9cb 100644
--- a/procedures/query/initBackReference.sql
+++ b/procedures/query/initBackReference.sql
@@ -23,7 +23,7 @@
 
 DROP PROCEDURE IF EXISTS db_2_0.initBackReference;
 DELIMITER //
-CREATE PROCEDURE db_2_0.initBackReference(in pid INT UNSIGNED, in pname VARCHAR(255), in eid INT UNSIGNED, in ename VARCHAR(255))
+CREATE PROCEDURE db_2_0.initBackReference(in pid INT UNSIGNED, in pname VARCHAR(255), in entity_id INT UNSIGNED, in ename VARCHAR(255))
 BEGIN
 	DECLARE propertiesTable VARCHAR(255) DEFAULT NULL;
 	DECLARE entitiesTable VARCHAR(255) DEFAULT NULL;
@@ -35,7 +35,7 @@ BEGIN
 
     IF ename IS NOT NULL THEN
         call createTmpTable(entitiesTable);
-        call initSubEntity(eid, ename, entitiesTable);
+        call initSubEntity(entity_id, ename, entitiesTable);
     END IF;
 
 	SELECT propertiesTable, entitiesTable;
diff --git a/procedures/query/initPOV.sql b/procedures/query/initPOV.sql
index e42113f1b4efd20dc9fe699c303deca82ce8540e..1d7c75a7d53190511212409b68dbfd9cdbe3a192 100644
--- a/procedures/query/initPOV.sql
+++ b/procedures/query/initPOV.sql
@@ -90,7 +90,7 @@ END //
 
 DROP PROCEDURE IF EXISTS db_2_0.initPOVRefidsTable //
 
-CREATE PROCEDURE db_2_0.initPOVRefidsTable(in vInt INT, in vText VARCHAR(255))
+CREATE PROCEDURE db_2_0.initPOVRefidsTable(in vInt INT UNSIGNED, in vText VARCHAR(255))
 BEGIN
     DECLARE refIdsTable VARCHAR(255) DEFAULT NULL; /*table for referenced entity ids*/
 	
diff --git a/procedures/query/initSubEntity.sql b/procedures/query/initSubEntity.sql
index b994891bb2cfe253cc2f274417b193262c955cfb..0390fcc4f7a2674cdf529e95b15fe66c4f0e81cd 100644
--- a/procedures/query/initSubEntity.sql
+++ b/procedures/query/initSubEntity.sql
@@ -26,7 +26,7 @@ DROP PROCEDURE IF EXISTS db_2_0.initSubEntity;
 
 DELIMITER //
 
-CREATE PROCEDURE db_2_0.initSubEntity(in eid INT UNSIGNED, in ename VARCHAR(255), in tableName VARCHAR(255))
+CREATE PROCEDURE db_2_0.initSubEntity(in e_id INT UNSIGNED, in ename VARCHAR(255), in tableName VARCHAR(255))
 BEGIN
 	DECLARE ecount INT DEFAULT 0;
    
@@ -37,8 +37,8 @@ BEGIN
     SET ecount = ROW_COUNT();
 	DEALLOCATE PREPARE stmt;
 
-    IF eid IS NOT NULL THEN
-        SET @stmtStr = CONCAT('INSERT IGNORE INTO `', tableName, '` (id) VALUES (', eid, ')');
+    IF e_id IS NOT NULL THEN
+        SET @stmtStr = CONCAT('INSERT IGNORE INTO `', tableName, '` (id) VALUES (', e_id, ')');
         PREPARE stmt FROM @stmtStr;
         EXECUTE stmt;
         SET ecount = ecount + ROW_COUNT();