backend_sources += files(
'appendinfo.c',
'clauses.c',
'inherit.c',
'joininfo.c',
'orclauses.c',
'paramassign.c',
'pathnode.c',
'placeholder.c',
'plancat.c',
'predtest.c',
'relnode.c',
'restrictinfo.c',
'tlist.c',
'var.c',
)