CAPTURE 

Appends query results to a file.

Appends the query results to a file in exponential notation format. Results do not appear in standard output; however error messages and cqlsh commands output displays in STDOUT.

Synopsis 

CAPTURE ['file_name' | OFF]
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.

Options 

Option Description
  Shows status.
OFF Stops capture
'file_name' Starts capture for CQL queries. Results of queries that run after capture begins are appended to the specified file; when you run the first query after beginning the capture, the file is created if it does not already exist. Use a relative path from the current working directory or specify tilde (~) for the user's HOME directory. Absolute paths are not supported.

Examples 

Begin capturing results to the winners text file:

CAPTURE '~/results/winners.txt'
Note: The folder must exist in the user's home directory, but the file is created if it does not exist.
Now capturing query output to '/Users/local_system_user/results/winners.txt'.
Execute a query that selects all winners:
select * from cycling.race_winners;

Results are written to end of the capture file and do not display in the terminal window.