次のSELECT文は、ソースの式にタイムゾーンが存在しないために、エラーを返します。
SELECT CAST(TIME '08:30:00' AS TIMESTAMP(0) AT SOURCE TIME ZONE); SELECT CAST(TIME '08:30:00' AS TIMESTAMP(0) AT SOURCE); SELECT CAST(TIME '08:30:00' AS TIMESTAMP(0) WITH TIME ZONE AT SOURCE TIME ZONE); SELECT CAST(TIME '08:30:00' AS TIMESTAMP(0) WITH TIME ZONE AT SOURCE);