maropu edited a comment on issue #25189: [SPARK-28435][SQL] Support accepting the interval keyword in the schema string URL: https://github.com/apache/spark/pull/25189#issuecomment-519305483 Yea, pg can explicitly cast a text to interval; ``` postgres=# \d t Table "public.t" Column | Type | Collation | Nullable | Default -------------+------+-----------+----------+--------- intervalstr | text | | | postgres=# select * from t; intervalstr ------------- 1 hour (1 row) postgres=# select cast(intervalstr as interval) from t; intervalstr ------------- 01:00:00 (1 row) postgres=# create temporary view v as select cast(intervalstr as interval) from t; postgres=# \d v View "pg_temp_3.v" Column | Type | Collation | Nullable | Default -------------+----------+-----------+----------+--------- intervalstr | interval | | | // literal case postgres=# select cast('1 hour' as interval); interval ---------- 01:00:00 (1 row) ```
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