DESCRIBE AGGREGATE

Shows this output depending on the options selected:

  • All user-defined aggregates (UDAs) in the current keyspace.

  • All UDAs in the cluster when no keyspace is selected.

  • Definition as an executable CQL statement for a specific UDA.

Synopsis

DESCRIBE AGGREGATES | AGGREGATE [<keyspace_name>.]<uda_name>
Syntax legend
Legend
Syntax conventions Description

UPPERCASE

Literal keyword.

Lowercase

Not literal.

< >

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.

<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.

AGGREGATES

All aggregates.

AGGREGATE

One aggregate.

<keyspace_name>

Name of the keyspace.

<uda_name>

Name of the user-defined aggregate.

Examples

List all cycling aggregates:

USE cycling; DESC AGGREGATES;
average(int)

Show the definition of the cycling average aggregate:

DESC AGGREGATE cycling.average

The result is an executable CQL statement:

CREATE AGGREGATE cycling.average(int)
    SFUNC avgstate
    STYPE frozen<tuple<int, bigint>>
    FINALFUNC avgfinal
    INITCOND (0, 0);

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