Document timestamp input limits #8369
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alamb
reviewed
Nov 30, 2023
| @@ -157,6 +161,10 @@ pub fn to_timestamp_micros(args: &[ColumnarValue]) -> Result<ColumnarValue> { | |||
| } | |||
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| /// to_timestamp_nanos SQL function | |||
| /// | |||
| /// Note: `to_timestamp_nanos` returns `Timestamp(Nanosecond)`. The supported range for integer input is between `-9223372037` and `9223372036`. | |||
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this doesn't seem right. I think the argument is treated as nanoseconds, so the range is really -i64::MIN to i64::MAX
For example, this works just fine
❯ select to_timestamp_nanos(92233720360000)
;
+-------------------------------------------+
| to_timestamp_nanos(Int64(92233720360000)) |
+-------------------------------------------+
| 1970-01-02T01:37:13.720360 |
+-------------------------------------------+
1 row in set. Query took 0.000 seconds.
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yes, you are right
| @@ -1497,6 +1500,9 @@ return the corresponding timestamp. | |||
| to_timestamp_nanos(expression) | |||
| ``` | |||
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| Note: `to_timestamp_nanos` returns `Timestamp(Nanosecond)`. The supported range for integer input is between `-9223372037` and `9223372036`. | |||
alamb
approved these changes
Dec 1, 2023
Co-authored-by: Andrew Lamb <andrew@nerdnetworks.org>
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🚀 |
appletreeisyellow
pushed a commit
to appletreeisyellow/datafusion
that referenced
this pull request
Dec 14, 2023
* document timestamp input limis * fix text * prettier * remove doc for nanoseconds * Update datafusion/physical-expr/src/datetime_expressions.rs Co-authored-by: Andrew Lamb <andrew@nerdnetworks.org> --------- Co-authored-by: Andrew Lamb <andrew@nerdnetworks.org>
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Which issue does this PR close?
Closes #8336
Closes #7958
Rationale for this change
Declared limits for
to_timestamp,to_timestamp_nanosfunctions to prevent overflows. Its been agreed in #8336 (comment) to useto_timestamp_secondsfunction for values between1677-09-21T00:12:44.0and2262-04-11T23:47:16.0What changes are included in this PR?
Are these changes tested?
No need
Are there any user-facing changes?
No