colinmarc commented on code in PR #3574:
URL: https://github.com/apache/iceberg-rust/pull/3574#discussion_r4423127828
##########
crates/iceberg/src/spec/values/datum.rs:
##########
@@ -1312,3 +1306,104 @@ fn human_float<T: Float + LowerExp + FromStr>(value: T)
-> String {
format!("{sign}{}.{fraction}E{exponent}", &digits[..1])
}
}
+
+const MICROS_PER_DAY: i64 = 24 * 60 * 60 * 1_000_000;
+const NANOS_PER_MICRO: i64 = 1000;
+const NANOS_PER_DAY: i64 = NANOS_PER_MICRO * MICROS_PER_DAY;
+
+/// Converts an int literal between two [PrimitiveType]s.
+fn convert_int(
+ val: i32,
+ source_type: &PrimitiveType,
+ target_type: &PrimitiveType,
+) -> Result<Datum> {
+ let datum = match (source_type, target_type) {
+ (_, PrimitiveType::Int) => Datum::int(val),
+ (_, PrimitiveType::Date) => Datum::date(val),
+ (_, PrimitiveType::Long) => Datum::long(val),
+ (PrimitiveType::Date, PrimitiveType::Timestamp) =>
Datum::timestamp_micros(
+ (val as i64)
+ .checked_mul(MICROS_PER_DAY)
+ .ok_or_else(overflow)?,
+ ),
+ (PrimitiveType::Date, PrimitiveType::Timestamptz) =>
Datum::timestamptz_micros(
+ (val as i64)
+ .checked_mul(MICROS_PER_DAY)
+ .ok_or_else(overflow)?,
+ ),
+ (PrimitiveType::Date, PrimitiveType::TimestampNs) =>
Datum::timestamp_nanos(
+ (val as i64)
+ .checked_mul(NANOS_PER_DAY)
+ .ok_or_else(overflow)?,
+ ),
+ (PrimitiveType::Date, PrimitiveType::TimestamptzNs) =>
Datum::timestamptz_nanos(
+ (val as i64)
+ .checked_mul(NANOS_PER_DAY)
+ .ok_or_else(overflow)?,
+ ),
Review Comment:
It makes sense not to silently introduce UTC. I think I was working off the
java code originally, but I'm not sure.
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