instead of blindly assuming a SELECT is not a UNION, leading to an out-of-bounds array access when it is. Change-Id: I8f904ae65acba8d8ee23b95299058207af68c0ca Reviewed-on: https://gerrit.libreoffice.org/c/core/+/113189 Reviewed-by: Lionel Mamane <lionel@mamane.lu> Tested-by: Jenkins