Simplified code

Author: ankane

src/pgvector.lua

@@ -31,9 +31,9 @@ function pgvector.deserialize(v)
 end
 
 function pgvector.setup_vector(pg)
-  local res = table.unpack(pg:query("SELECT to_regtype('vector')::oid AS oid"))
-  assert(res, "vector type not found in the database")
-  pg:set_type_deserializer(res.oid, "vector", function(self, v) return pgvector.deserialize(v) end)
+  local row = pg:query("SELECT to_regtype('vector')::oid AS vector_oid")[1]
+  assert(row["vector_oid"], "vector type not found in the database")
+  pg:set_type_deserializer(row["vector_oid"], "vector", function(self, v) return pgvector.deserialize(v) end)
 end
 
 return pgvector