Shows information on user-defined functions (UDFs).

Shows this output depending on the options selected:

  • All user-defined functions (UDFs) in the current keyspace.
  • All UDFs in the cluster when no keyspace is selected.
  • Definition as an executable CQL statement for a specific UDF.
Tip: To select a keyspace, use the USE command.


DESCRIBE FUNCTIONS | FUNCTION [keyspace_name.]udf_name
Table 1. Legend
Syntax conventions Description
UPPERCASE Literal keyword.
Lowercase Not literal.
Italics Variable value. Replace with a user-defined value.
[] Optional. Square brackets ( [] ) surround optional command arguments. Do not type the square brackets.
( ) Group. Parentheses ( ( ) ) identify a group to choose from. Do not type the parentheses.
| Or. A vertical bar ( | ) separates alternative elements. Type any one of the elements. Do not type the vertical bar.
... Repeatable. An ellipsis ( ... ) indicates that you can repeat the syntax element as often as required.
'Literal string' Single quotation ( ' ) marks must surround literal strings in CQL statements. Use single quotation marks to preserve upper case.
{ key : value } Map collection. Braces ( { } ) enclose map collections or key value pairs. A colon separates the key and the value.
<datatype1,datatype2> Set, list, map, or tuple. Angle brackets ( < > ) enclose data types in a set, list, map, or tuple. Separate the data types with a comma.
cql_statement; End CQL statement. A semicolon ( ; ) terminates all CQL statements.
[--] Separate the command line options from the command arguments with two hyphens ( -- ). This syntax is useful when arguments might be mistaken for command line options.
' <schema> ... </schema> ' Search CQL only: Single quotation marks ( ' ) surround an entire XML schema declaration.
@xml_entity='xml_entity_type' Search CQL only: Identify the entity and literal value to overwrite the XML element in the schema and solrConfig files.
All functions.
One function.
Name of the keyspace.

Name of the function.


List the functions in the cycling keyspace:
flog(double)                              avgfinal(frozen<tuple<int, bigint>>)
avgstate(frozen<tuple<int, bigint>>,int)  left(text,int)           
Show the definition of the cycling flog function:
DESC FUNCTION cycling.flog
CREATE FUNCTION cycling.flog(input double)
    RETURNS double
    LANGUAGE java
    AS $$return Double.valueOf(Math.log(input.doubleValue()));$$;