snuyanzin commented on code in PR #25763:
URL: https://github.com/apache/flink/pull/25763#discussion_r1895088694


##########
docs/data/sql_functions.yml:
##########
@@ -679,9 +679,12 @@ temporal:
   - sql: TO_DATE(string1[, string2])
     table: toDate(STRING1[, STRING2])
     description: Converts a date string string1 with format string2 (by 
default 'yyyy-MM-dd') to a date.
-  - sql: TO_TIMESTAMP_LTZ(numeric, precision)
+  - sql: TO_TIMESTAMP_LTZ(numeric[, precision])
     table: toTimestampLtz(NUMERIC, PRECISION)
-    description: "Converts a epoch seconds or epoch milliseconds to a 
TIMESTAMP_LTZ, the valid precision is 0 or 3, the 0 represents 
TO_TIMESTAMP_LTZ(epochSeconds, 0), the 3 represents 
TO_TIMESTAMP_LTZ(epochMilliseconds, 3)."
+    description: Converts an epoch seconds or epoch milliseconds to a 
TIMESTAMP_LTZ, the valid precision is 0 or 3, the 0 represents 
TO_TIMESTAMP_LTZ(epochSeconds, 0), the 3 represents 
TO_TIMESTAMP_LTZ(epochMilliseconds, 3). If no precision is provided, the 
default precision is 3.
+  - sql: TO_TIMESTAMP_LTZ(string1[, string2[, string3]])
+    table: toTimestampLtz(STRING1[, STRING2[, STRING3]])
+    description: Converts a timestamp string string1 with format string2 (by 
default 'yyyy-MM-dd HH:mm:ss.SSS') to a TIMESTAMP_LTZ in time zone string3. If 
no time zone is provided, the default time zone is the session time zone.

Review Comment:
   I think we should explicitly mention that any null input leads to null 
output like it is done for some other functions (especially array related) 



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