Add drop view v1 to the test to avoid failure if previous test forget to drop it

mysql-test/columnstore/oracle/func_concat_oracle_maxscale.test

@@ -8,6 +8,13 @@
 SET sql_mode=ORACLE;
 SET default_storage_engine=ColumnStore;
 
+--disable_query_log
+--disable_warnings
+DROP VIEW IF EXISTS v1;
+--enable_warnings
+--enable_query_log
+
+
 EXPLAIN EXTENDED SELECT 'a'||'b'||'c';
 EXPLAIN EXTENDED SELECT CONCAT('a'||'b'||'c');
 

mysql-test/columnstore/oracle/func_decode_oracle.test

@@ -1,5 +1,12 @@
 SET sql_mode=ORACLE;
 SET default_storage_engine=ColumnStore;
+
+--disable_query_log
+--disable_warnings
+DROP VIEW IF EXISTS v1;
+--enable_warnings
+--enable_query_log
+
 --error ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT
 SELECT DECODE(10);
 --error ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT

mysql-test/columnstore/oracle/func_replace_oracle.test

@@ -8,6 +8,13 @@ SET default_storage_engine=ColumnStore;
 --echo # MDEV-13003 - Oracle compatibility : Replace function
 --echo #
 
+--disable_query_log
+--disable_warnings
+DROP VIEW IF EXISTS v1;
+--enable_warnings
+--enable_query_log
+
+
 SELECT REPLACE(null,'a','b') ;
 SELECT REPLACE('ab',null,'b') ;
 SELECT REPLACE('ab','a',null) ;