histogramBuckets property
If non-empty, we place dimension values into buckets after string to int64.
Dimension values that are not the string representation of an integral
value will be converted to zero. The bucket values have to be in
increasing order. Each bucket is closed on the lower end, and open on the
upper end. The "first" bucket includes all values less than the first
boundary, the "last" bucket includes all values up to infinity. Dimension
values that fall in a bucket get transformed to a new dimension value. For
example, if one gives a list of "0, 1, 3, 4, 7", then we return the
following buckets: - bucket #1: values < 0, dimension value "<0" -
bucket #2: values in [0,1), dimension value "0" - bucket #3: values in
[1,3), dimension value "1-2" - bucket #4: values in [3,4), dimension
value "3" - bucket #5: values in [4,7), dimension value "4-6" - bucket
#6: values >= 7, dimension value "7+" NOTE: If you are applying histogram
mutation on any dimension, and using that dimension in sort, you will want
to use the sort type HISTOGRAM_BUCKET for that purpose. Without that the
dimension values will be sorted according to dictionary (lexicographic)
order. For example the ascending dictionary order is: "<50", "1001+",
"121-1000", "50-120" And the ascending HISTOGRAM_BUCKET order is:
"<50", "50-120", "121-1000", "1001+" The client has to explicitly request
"orderType": "HISTOGRAM_BUCKET" for a histogram-mutated dimension.
Implementation
core.List<core.String>? histogramBuckets;