tdigest(value: string or object) -> tdigest of float64

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.

Domain

This is a scalar function (calculates a single output value for a single input row).

Categories

• Misc

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.