yiyutian1 commented on code in PR #25874:
URL: https://github.com/apache/flink/pull/25874#discussion_r1906204298
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flink-python/pyflink/table/expressions.py:
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@@ -350,14 +350,21 @@ def temporal_overlaps(left_time_point,
def date_format(timestamp, format) -> Expression:
"""
Formats a timestamp as a string using a specified format.
- The format must be compatible with MySQL's date formatting syntax as used
by the
- date_parse function.
- For example `date_format(col("time"), "%Y, %d %M")` results in strings
formatted as
- "2017, 05 May".
+ Supported functions:
+ 1. date_format(TIMESTAMP, STRING) -> STRING
+ Converts timestamp to a string, using a format string.
+ The format string is compatible with Java's DateTimeFormatter.
+ 2. date_format(STRING, STRING) -> STRING
+ Converts timestamp string, using a format string.
+ The format string is compatible with Java's SimpleDateFormat.
+
+ Example:
+ ::
+
+ >>> table.select(date_format(to_timestamp('2020-04-15'), "yyyy/MM/dd"))
+ >>> table.select(date_format("2020-04-15", "MM/dd/yyyy"))
Review Comment:
Thanks for the catch. Addressed.
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