pitrou commented on code in PR #14223:
URL: https://github.com/apache/arrow/pull/14223#discussion_r1092180657
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go/arrow/array/encoded.go:
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@@ -68,6 +69,65 @@ func (r *RunEndEncoded) Release() {
r.ends.Release()
}
+// LogicalValuesArray returns an array holding the values of each
+// run, only over the range of run values inside the logical offset/length
+// range of the parent array.
+//
+// The return from this needs to be Released
+func (r *RunEndEncoded) LogicalValuesArray() arrow.Array {
+ physOffset := r.GetPhysicalOffset()
+ physLength := r.GetPhysicalLength()
+ data := NewSliceData(r.data.Children()[1], int64(physOffset),
int64(physOffset+physLength))
+ defer data.Release()
+ return MakeFromData(data)
+}
+
+// LogicalRunEndsArray returns an array holding the logical indexes
+// of each run end, only over the range of run end values relative
+// to the logical offset/length range of the parent array.
+//
+// For arrays with an offset, this is not a slice of the existing
+// internal run ends array.
+//
+// The return from this needs to be Released
Review Comment:
Also can you mention that this function is expensive if the logical offset
is non-zero (i.e. it doesn't just return a slice)?
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