Re: [PR] support to_timestamp with optional chrono formats [datafusion]

["jayzhan211 (via GitHub)" <gi...@apache.org>]

jayzhan211 commented on PR #8886:
URL: https://github.com/apache/datafusion/pull/8886#issuecomment-2467332555

   @Omega359 Do you know why `to_timestamp` has more than 2 arguments? What behaviour does this function follow?
   
   In Postgres, there are two arguments
   ```
   to_timestamp ( text, text ) → timestamp with time zone
   
   Converts string to time stamp according to the given format. (See also to_timestamp(double precision) in [Table 9.33](https://www.postgresql.org/docs/current/functions-datetime.html#FUNCTIONS-DATETIME-TABLE).)
   
   to_timestamp('05 Dec 2000', 'DD Mon YYYY') → 2000-12-05 00:00:00-05
   ```
   ```
   to_timestamp ( double precision ) → timestamp with time zone
   
   Convert Unix epoch (seconds since 1970-01-01 00:00:00+00) to timestamp with time zone
   
   to_timestamp(1284352323) → 2010-09-13 04:32:03+00
   ```
   
   
   Can I change the signature to be consistent with Postgres one?
   
   https://github.com/apache/datafusion/blob/7ebd993fe47e78006bad33256160716f73b13cef/datafusion/sqllogictest/test_files/timestamps.slt#L362-L366


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