gokselk commented on code in PR #19663:
URL: https://github.com/apache/datafusion/pull/19663#discussion_r2675656169
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datafusion/functions/src/datetime/to_timestamp.rs:
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@@ -325,6 +327,75 @@ impl_to_timestamp_constructors!(ToTimestampMillisFunc);
impl_to_timestamp_constructors!(ToTimestampMicrosFunc);
impl_to_timestamp_constructors!(ToTimestampNanosFunc);
+fn decimal_to_nanoseconds(value: i128, scale: i8) -> i64 {
+ let nanos_exponent = 9_i16 - scale as i16;
+ let timestamp_nanos = if nanos_exponent >= 0 {
+ value * 10_i128.pow(nanos_exponent as u32)
+ } else {
+ value / 10_i128.pow(nanos_exponent.unsigned_abs() as u32)
+ };
+ timestamp_nanos as i64
+}
+
+fn decimal128_to_timestamp_nanos(
Review Comment:
Good idea, I did some changes about that in 376bd9d.
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