kll_sketch_to_string_double function

Applies to: Databricks Runtime 18.0 and later

Returns a human-readable string representation of a double KLL sketch for debugging.

Syntax

kll_sketch_to_string_double ( sketch )

Arguments

• sketch: A BINARY expression containing a serialized DOUBLE KLL sketch.

Returns

A STRING containing debug information including: sketch parameters, item count, min/max values, and internal structure.

Notes

• Primarily intended for debugging and troubleshooting.
• Output format may change between versions.

Related functions

• kll_sketch_agg_double aggregate function
• kll_sketch_to_string_bigint function
• kll_sketch_to_string_float function