apilloud commented on a change in pull request #12054:
URL: https://github.com/apache/beam/pull/12054#discussion_r445244602
##########
File path:
sdks/java/core/src/main/java/org/apache/beam/sdk/schemas/logicaltypes/SqlTypes.java
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@@ -27,4 +28,7 @@ private SqlTypes() {}
/** Beam LogicalType corresponding to ZetaSQL/CalciteSQL DATE type. */
public static final LogicalType<LocalDate, Long> DATE = new Date();
+
+ /** Beam LogicalType corresponding to ZetaSQL/CalciteSQL TIME type. */
+ public static final LogicalType<LocalTime, Long> TIME = new Time();
Review comment:
This is the most important line of this CL for correctness, wanted to
get attention on it early.
ZetaSQL uses a very specific format for this, which roughly matches the
struct in LocalTime:
https://github.com/google/zetasql/blob/79adcd0fe227173e68ed7aa88f580a691ebe82c2/zetasql/public/civil_time.h#L85
It appears the Long base type is an offset in Nanoseconds. Is that
conversion lossless? Is it expensive?
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