diff --git a/plugins/mezuro/script/kalibro_scripts.conf b/plugins/mezuro/script/kalibro_scripts.conf
index cd5e78d..7896a5c 100644
--- a/plugins/mezuro/script/kalibro_scripts.conf
+++ b/plugins/mezuro/script/kalibro_scripts.conf
@@ -1,6 +1,8 @@
 # Definition of constants used in kalibro scripts.
 
+KALIBRO_DIR=~/kalibro
+PSQLFILE=$KALIBRO_DIR/KalibroCore/src/META-INF/PostgreSQL.sql
 DATABASE="kalibro_test"
 PASSWORD="kalibro"
 QUERYFILE=/tmp/query
-EXCEPTION="sequences"
+
diff --git a/plugins/mezuro/script/prepare_kalibro_query_file.sh b/plugins/mezuro/script/prepare_kalibro_query_file.sh
index 0740286..cb205a3 100755
--- a/plugins/mezuro/script/prepare_kalibro_query_file.sh
+++ b/plugins/mezuro/script/prepare_kalibro_query_file.sh
@@ -2,8 +2,16 @@
 
 source plugins/mezuro/script/kalibro_scripts.conf
 
-sudo su postgres -c "export PGPASSWORD=$PASSWORD &&
-                     if [ -f $QUERYFILE ]
-                        then rm $QUERYFILE
-                     fi &&
-                     psql -q -t -d $DATABASE -c \"SELECT 'DELETE FROM ' || n.nspname || '.' || c.relname || ' CASCADE;' FROM pg_catalog.pg_class AS c LEFT JOIN pg_catalog.pg_namespace AS n ON n.oid = c.relnamespace WHERE relkind = 'r' AND n.nspname NOT IN ('pg_catalog', 'pg_toast') AND pg_catalog.pg_table_is_visible(c.oid)\" | sed '/$EXCEPTION/d' | sort > $QUERYFILE"
+DROPLIMIT="END OF DROP TABLES"
+RANGE=$(grep -n "$DROPLIMIT" $PSQLFILE | cut -d":" -f1)
+START=1
+END=$(($RANGE - 1))
+CUT=$START,$END\!d
+REPLACE="s/DROP TABLE IF EXISTS sequences,/TRUNCATE/"
+
+if [ -f $QUERYFILE ]
+  then sudo rm $QUERYFILE
+fi
+
+sed -e "$CUT" -e "$REPLACE" $PSQLFILE > $QUERYFILE
+sudo chown postgres.postgres $QUERYFILE
--
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