Manual Reference Pages - PROTOCOL::CASSANDRACQL::RESULT (3)
"Protocol::CassandraCQL::Result" - stores the result of a Cassandra CQL query
Objects in this class store the result of a direct query or executed prepared
statement, as returned by an OPCODE_RESULT giving RESULT_ROWS. It allows
convenient access to the decoded row data.
As a subclass of Protocol::CassandraCQL::ColumnMeta it also provides
information about column metadata, such as column names and types.
Returns a new result object initialised from the given OPCODE_RESULT /
RESULT_ROWS message frame and CQL version number. (Version will default to
1 if not supplied, but this may become a required parameter in a future
Returns a new result object initialised directly from the given row data. This
constructor is intended for use by unit test scripts, to create results
directly from mocked connection objects or similar.
In addition to the arguments taken by the superclass constructor, it takes the
following named arguments:
rows => ARRAY[ARRAY]
An ARRAY reference containing ARRAY references of the individual rows data.
CW$result->set_metadata( CW$meta )
If the result was constructed from a message frame with the
ROWS_NO_METADATA flag set, it would not have embedded metadata allowing the
object to correctly decode the encoded byte strings. This method allows the
caller to provide the metadata as previously returned by the OPCODE_PREPARE
operation that prepared the query initially, enabling its decoding.
If the result object lacks this metadata, then before this method is called
only the rows and columns methods may be used to return the general
shape of the data; any of the row data methods will throw exceptions until
the metadata is set.
CW$n = CW$result->rows
Returns the number of rows
CW$data = CW$result->row_array( CW$idx )
Returns the rows data decoded, as an ARRAY reference
CW$data = CW$result->row_hash( CW$idx )
Returns the rows data decoded, as a HASH reference mapping column short names
CW@data = CW$result->rows_array
Returns a list of all the rows data decoded as ARRAY references.
CW@data = CW$result->rows_hash
Returns a list of all the rows data decoded as HASH references.
CW$map = CW$result->rowmap_array( CW$keyidx )
Returns a HASH reference mapping keys to rows deccoded as ARRAY references.
$keyidx gives the column index of the value to use as the key in the
CW$map = CW$result->rowmap_hash( CW$keyname )
Returns a HASH reference mapping keys to rows decoded as HASH references.
$keyname gives the column shortname of the value to use as the key in the
This code was paid for by
Paul Evans <firstname.lastname@example.org>
|perl v5.20.3 ||PROTOCOL::CASSANDRACQL::RESULT (3) ||2016-03-17 |
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