[Proposal] Add MONTH_DAY_NANO interval type

apache · Apr 27, 2021 · 30e4207 · 30e4207
1 parent 70755a1
commit 30e4207
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Showing 2 changed files with 6 additions and 2 deletions.
diff --git a/cpp/submodules/parquet-testing b/cpp/submodules/parquet-testing
diff --git a/format/Schema.fbs b/format/Schema.fbs
@@ -246,7 +246,7 @@ table Timestamp {
   timezone: string;
 }
 
-enum IntervalUnit: short { YEAR_MONTH, DAY_TIME}
+enum IntervalUnit: short { YEAR_MONTH, DAY_TIME, MONTH_DAY_NANO}
 // A "calendar" interval which models types that don't necessarily
 // have a precise duration without the context of a base timestamp (e.g.
 // days can differ in length during day light savings time transitions).
@@ -255,6 +255,10 @@ enum IntervalUnit: short { YEAR_MONTH, DAY_TIME}
 // DAY_TIME - Indicates the number of elapsed days and milliseconds,
 //   stored as 2 contiguous 32-bit integers (8-bytes in total).  Support
 //   of this IntervalUnit is not required for full arrow compatibility.
+// MONTH_DAY_NANOS - A triple of (# of months, # of days, # nanoseconds).
+//  The values are stored contiguously in 16 byte blocks. Months and
+//  days are encoded as 32 bit integers and nanoseconds is encoded as a
+//  64 bit integer.
 table Interval {
   unit: IntervalUnit;
 }