tdigest¶
Description¶
Convert a JSON string, an object, or a variant to tdigest, if possible.
The input must be of the following shape:
{"state":[1,2,4,1,6,2],"type":"tdigest","version":1}
More specifically, the input must contain:
Exactly 3 keys
“state” key, with an array of numbers as its value
“type” key, with “tdigest” as its value
“version” key, with 1 as its value
If the input is not tdigest-conforming, this function returns null.
Return type¶
tdigest
Domain¶
This is a scalar function (calculates a single output value for a single input row.)
Categories¶
Usage¶
tdigest(value)
Argument |
Type |
Optional |
Repeatable |
Restrictions |
|---|---|---|---|---|
value |
string or object |
no |
no |
none |
Examples¶
make_col str_to_tdigest:tdigest(str)
Create a new column named str_to_tdigest, which contains the data in column
str, interpreted as tdigest.