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| Net::Async::CassandraCQL::Query(3) | User Contributed Perl Documentation | Net::Async::CassandraCQL::Query(3) |
NAME
"Net::Async::CassandraCQL::Query" - a Cassandra CQL prepared queryDESCRIPTION
Prepared query objects are returned by the "prepare" of Net::Async::CassandraCQL to represent a prepared query in the server. They can be executed multiple times, if required, by passing the values of the placeholders to the "execute" method.For backward compatibility, as this object class is no longer a subclass of Protocol::CassandraCQL::ColumnMeta, the following methods will be directed to the "params_meta" instance.
columns column_name column_shortname column_type find_column encode_data decode_data
However, most of them are available more directly as the "param*" methods. Code should not rely on these temporary redirects remaining in a future version.
METHODS
$id = $query->id
Returns the query ID.$cql = $query->cql
Returns the original query string used to prepare the query.$meta = $query->params_meta
Returns a Protocol::CassandraCQL::ColumnMeta instance with the metadata about the bind parameters.$n_params = $query->params
$name = $query->param_name( $idx )
( $keyspace, $table, $column ) = $query->param_name( $idx )
$name = $query->param_shortname( $idx )
$type = $query->param_type( $idx )
Redirections to the appropriately named method on the "params_meta" object.$meta = $query->result_meta
Returns a Protocol::CassandraCQL::ColumnMeta instance with the metadata about the query result. This will only be defined on connections with a "cql_version" of 2 or above.$query->execute( $data, $consistency ) ==> ( $type, $result )
Executes the query on the Cassandra connection object that created it, returning a future yielding the result the same way as the "query" or "execute" methods.The contents of the $data reference will be encoded according to the types given in the underlying column metadata. $data may be given as a positional ARRAY reference, or a named HASH reference where the keys give column names.
SPONSORS
This code was paid for by- Perceptyx <http://www.perceptyx.com/>
- Shadowcat Systems <http://www.shadow.cat>
AUTHOR
Paul Evans <leonerd@leonerd.org.uk>| 2022-04-09 | perl v5.32.1 |
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