core cats: Add IF EXISTS in drop table statements

- Using if exists avoid return of fatal error from database
  Allow the use of parameter ExitOnFatal = true on normal workflow
- Fixes #1409: DB error on restore with ExitOnFatal=true

Signed-off-by: Bruno Friedmann <bruno.friedmann@bareos.com>

core/src/cats/dml/0018_uar_del_temp

@@ -1 +1 @@
-DROP TABLE temp
+DROP TABLE IF EXISTS temp

core/src/cats/dml/0019_uar_del_temp1

@@ -1 +1 @@
-DROP TABLE temp1
+DROP TABLE IF EXISTS temp1

core/src/cats/mysql_queries.inc

@@ -214,11 +214,11 @@ const char *BareosDbMysql::query_definitions[] = {
 ,
 
 /* 0018_uar_del_temp */
-"DROP TABLE temp "
+"DROP TABLE IF EXISTS temp "
 ,
 
 /* 0019_uar_del_temp1 */
-"DROP TABLE temp1 "
+"DROP TABLE IF EXISTS temp1 "
 ,
 
 /* 0020_uar_last_full */

core/src/cats/postgresql_queries.inc

@@ -211,11 +211,11 @@ const char *BareosDbPostgresql::query_definitions[] = {
 ,
 
 /* 0018_uar_del_temp */
-"DROP TABLE temp "
+"DROP TABLE IF EXISTS temp "
 ,
 
 /* 0019_uar_del_temp1 */
-"DROP TABLE temp1 "
+"DROP TABLE IF EXISTS temp1 "
 ,
 
 /* 0020_uar_last_full */

core/src/cats/sqlite_queries.inc

@@ -214,11 +214,11 @@ const char *BareosDbSqlite::query_definitions[] = {
 ,
 
 /* 0018_uar_del_temp */
-"DROP TABLE temp "
+"DROP TABLE IF EXISTS temp "
 ,
 
 /* 0019_uar_del_temp1 */
-"DROP TABLE temp1 "
+"DROP TABLE IF EXISTS temp1 "
 ,
 
 /* 0020_uar_last_full */

core/src/dird/query.sql

@@ -90,8 +90,8 @@ SELECT DISTINCT Job.JobId,VolumeName
 # 8
 :List Volumes to Restore All Files
 *Enter Client Name:
-!DROP TABLE temp;
-!DROP TABLE temp2;
+!DROP TABLE IF EXISTS temp;
+!DROP TABLE IF EXISTS temp2;
 CREATE TABLE temp (JobId BIGINT NOT NULL,
  JobTDate BIGINT,
  ClientId BIGINT,
@@ -135,8 +135,8 @@ INSERT INTO temp2 SELECT DISTINCT Job.JobId,Job.StartTime,Media.VolumeName,
  AND JobMedia.MediaId=Media.MediaId;
 # list results
 SELECT DISTINCT VolumeName from temp2;
-!DROP TABLE temp;
-!DROP TABLE temp2;
+!DROP TABLE IF EXISTS temp;
+!DROP TABLE IF EXISTS temp2;
 
 # 9
 :List Pool Attributes for a selected Pool