tdf#122437 mysqlc: fix foreign key name query

Correct query of the foreign key constraint name is required for
dropping foreign keys.

Change-Id: Id98b0672ec5a8a06039667a06cb0afd97b3ee205
Reviewed-on: https://gerrit.libreoffice.org/65861
Tested-by: Jenkins
Reviewed-by: Tamás Bunth <btomi96@gmail.com>
diff --git a/connectivity/source/drivers/mysqlc/mysqlc_databasemetadata.cxx b/connectivity/source/drivers/mysqlc/mysqlc_databasemetadata.cxx
index 0da41f5..3faf928 100644
--- a/connectivity/source/drivers/mysqlc/mysqlc_databasemetadata.cxx
+++ b/connectivity/source/drivers/mysqlc/mysqlc_databasemetadata.cxx
@@ -952,7 +952,7 @@
        // delete rule
        aRow.push_back(makeAny(xRow->getShort(8)));
        // foreign key name
        aRow.push_back(makeAny(xRow->getShort(9)));
        aRow.push_back(makeAny(xRow->getString(9)));
        // primary key name
        aRow.push_back(makeAny(OUString{})); // TODO
        // deferrability