title: Snowflake DB join on Timestamp field auto conversion issue
body: <p>I have two tables both of which have a timestamp field [TIMESTAMP_TZ] and when I perform a join based on this timestamp field the plan in snowflake DB shows an auto conversion on these timestamps into LTZ. Ex
  (TO_TIMESTAMP_LTZ(CAG.LOAD_DATE_UTC) = TO_TIMESTAMP_LTZ(PIT.CSAT_AGREEMENT_LDTS))
  Any reason why this is happening?</p>