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cassandra.metadata - Schema and Ring Topology¶set() -> new empty set object set(iterable) -> new set object
Build an unordered collection of unique elements.
set() -> new empty set object set(iterable) -> new set object
Build an unordered collection of unique elements.
set() -> new empty set object set(iterable) -> new set object
Build an unordered collection of unique elements.
Holds a representation of the cluster schema and topology.
Returns a tuple (host, new), where host is a Host
instance, and new is a bool indicating whether
the host was newly added.
Returns a string that can be executed as a query in order to recreate the entire schema. The string is formatted to be human readable.
Find a host in the metadata for a specific endpoint. If a string inet address and port are passed,
iterate all hosts to match the broadcast_rpc_address and
broadcast_rpc_port attributes.
A representation of the schema for a single keyspace.
Returns a CQL query string that can be used to recreate just this keyspace, not including user-defined types and tables.
Returns a CQL query string that can be used to recreate the entire keyspace, including user-defined types and tables.
A user defined type, as created by CREATE TYPE statements.
User-defined types were introduced in Cassandra 2.1.
New in version 2.1.0.
Returns a CQL query that can be used to recreate this type.
If formatted is set to True, extra whitespace will
be added to make the query more readable.
A user defined function, as created by CREATE FUNCTION statements.
User-defined functions were introduced in Cassandra 2.2
New in version 2.6.0.
Returns a CQL query that can be used to recreate this function.
If formatted is set to True, extra whitespace will
be added to make the query more readable.
A user defined aggregate function, as created by CREATE AGGREGATE statements.
Aggregate functions were introduced in Cassandra 2.2
New in version 2.6.0.
Returns a CQL query that can be used to recreate this aggregate.
If formatted is set to True, extra whitespace will
be added to make the query more readable.
A representation of the schema for a single table.
Returns a CQL query that can be used to recreate this table (index
creations are not included). If formatted is set to True,
extra whitespace will be added to make the query human readable.
Returns a string of CQL queries that can be used to recreate this table along with all indexes on it. The returned string is formatted to be human readable.
A boolean indicating if this table can be represented as CQL in export
A list of ColumnMetadata representing the components of
the primary key for this table.
For C* 3.0+. option_maps take a superset of map names, so if nothing changes structurally, new option maps can just be appended to the list.
A boolean indicating if this table can be represented as CQL in export
Returns a CQL query that can be used to recreate this table (index
creations are not included). If formatted is set to True,
extra whitespace will be added to make the query human readable.
A representation of a single column in a table.
A representation of a secondary index on a column.
Returns a CQL query that can be used to recreate this index.
Returns a CQL query string that can be used to recreate this index.
A representation of a materialized view on a table
Returns a CQL query that can be used to recreate this function.
If formatted is set to True, extra whitespace will
be added to make the query more readable.
A representation of a vertex on a table
A representation of an edge on a table
Information about the layout of the ring.
Abstract class representing a token.
A token for Murmur3Partitioner.
token is an int or string representing the token.
A token for RandomPartitioner.
A token for ByteOrderedPartitioner.
token_string should be the string representation from the server.
alias of cassandra.metadata._ReplicationStrategy
Represent the replication factor of a keyspace.
Returns a string version of these replication options which are suitable for use in a CREATE KEYSPACE statement.
The replication factor for this keyspace.
For backward compatibility, this returns the
cassandra.metadata.ReplicationFactor.full_replicas value of
cassandra.metadata.SimpleStrategy.replication_factor_info.
Returns a string version of these replication options which are suitable for use in a CREATE KEYSPACE statement.
Returns a string version of these replication options which are suitable for use in a CREATE KEYSPACE statement.
Returns a dict with the keys grouped per host. This can be
used to more accurately group by IN clause or to batch the keys per host.
If a valid replica is not found for a particular key it will be grouped under
NO_VALID_REPLICA
Example usage:
>>> result = group_keys_by_replica(
... session, "system", "peers",
... (("127.0.0.1", ), ("127.0.0.2", )))
cassandra - Exceptions and Enumscassandra.cluster - Clusters and Sessionscassandra.policies - Load balancing and Failure Handling Policiescassandra.auth - Authenticationcassandra.graph - Graph Statements, Options, and Row Factoriescassandra.metadata - Schema and Ring Topologycassandra.metrics - Performance Metricscassandra.query - Prepared Statements, Batch Statements, Tracing, and Row Factoriescassandra.pool - Hosts and Connection Poolscassandra.protocol - Protocol Featurescassandra.encoder - Encoders for non-prepared Statementscassandra.decoder - Data Return Formatscassandra.concurrent - Utilities for Concurrent Statement Executioncassandra.connection - Low Level Connection Infocassandra.util - Utilitiescassandra.timestamps - Timestamp Generationcassandra.io.asyncioreactor - asyncio Event Loopcassandra.io.asyncorereactor - asyncore Event Loopcassandra.io.eventletreactor - eventlet-compatible Connectioncassandra.io.libevreactor - libev Event Loopcassandra.io.geventreactor - gevent-compatible Event Loopcassandra.io.twistedreactor - Twisted Event Loopcassandra.cqlengine.models - Table models for object mappingcassandra.cqlengine.columns - Column types for object mapping modelscassandra.cqlengine.query - Query and filter model objectscassandra.cqlengine.connection - Connection management for cqlenginecassandra.cqlengine.management - Schema management for cqlenginecassandra.cqlengine.usertype - Model classes for User Defined Typescassandra.datastax.graph - Graph Statements, Options, and Row Factoriescassandra.datastax.graph.fluentcassandra.datastax.graph.fluent.querycassandra.datastax.graph.fluent.predicates