https://community.databricks.com/t5/delete/unable-to-execute-hll-sketch-estimate-built-in-function-from/m-p/3802#M22 <P>That was added in runtime 13.1. Are you using 13.1?</P> Sat, 03 Jun 2023 00:24:19 GMT sean_owen 2023-06-03T00:24:19Z https://community.databricks.com/t5/delete/unable-to-execute-hll-sketch-estimate-built-in-function-from/m-p/3801#M21 <P>Tried example from databricks doc <A href="https://docs.databricks.com/sql/language-manual/functions/hll_sketch_agg.html" target="test_blank">https://docs.databricks.com/sql/language-manual/functions/hll_sketch_agg.html</A></P><P> %sql</P><P> SELECT hll_sketch_estimate(hll_sketch_agg(col, 12)) FROM VALUES (1), (1), (2), (2), (3) tab(col);</P><P></P><P>it fails with </P><P>AnalysisException: Undefined function: hll_sketch_estimate. This function is neither a built-in/temporary function, nor a persistent function that is qualified as spark_catalog.default.hll_sketch_estimate.; line 1 pos 7</P><P></P><P>How to execute hll functions from notebook?</P><P></P> Wed, 31 May 2023 16:14:16 GMT https://community.databricks.com/t5/delete/unable-to-execute-hll-sketch-estimate-built-in-function-from/m-p/3801#M21 saras 2023-05-31T16:14:16Z https://community.databricks.com/t5/delete/unable-to-execute-hll-sketch-estimate-built-in-function-from/m-p/3802#M22 <P>That was added in runtime 13.1. Are you using 13.1?</P> Sat, 03 Jun 2023 00:24:19 GMT https://community.databricks.com/t5/delete/unable-to-execute-hll-sketch-estimate-built-in-function-from/m-p/3802#M22 sean_owen 2023-06-03T00:24:19Z