http://www.w3.org/ns/prov#value | - The model in OpenDBX appears to be to query and then iterate getting results until there are none; if there's ever an error, see if it's a kind of error that requires a reconnection attempt before continuing. Without assuming PGRES_FATAL_ERROR always means a reconnect is required, it seems like PQstatus() is the right test for the latter of those two "ifs", and that's what t
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