About system keyspace tables

Provides details about database objects and cluster configuration in the system keyspace tables.

The system keyspace includes a number of tables that contain details about your database objects and cluster configuration.
Table 1. Columns in system tables
Table name Column name Comment
available_ranges keyspace_name, ranges
batches id, mutations, version
batchlog id, data, version, written_at
built_views keyspace_name, view_name Information on materialized views
compaction_history id, bytes_in, bytes_out, columnfamily_name, compacted_at, keyspace_name, rows_merged Information on compaction history
"IndexInfo" table_name, index_name Information on indexes
local key, bootstrapped, broadcast_address, cluster_name, cql_version, data_center, dse_version, gossip_generation, graph, host_id, listen_address, native_protocol_version, partitioner, rack, release_version, rpc_address, schema_version, server_id, thrift_version, tokens, truncated_at, workload, workloads Information on a node has about itself and a superset of gossip.
paxos row_key, cf_id, in_progress_ballot, most_recent_commit, most_recent_commit_at, most_recent_commit_version, proposal, proposal_ballot, proposal_version Information on lightweight Paxos transactions
peers peer, data_center, dse_version, graph, host_id, preferred_ip, rack, release_version, rpc_address, schema_version, server_id, tokens, workload, workloads Each node records what other nodes tell it about themselves over the gossip.
peer_events peer, hints_dropped

prepared_id, logged_keyspace, query_string

Prepared statements used by drivers for queries.
range_xfers token_bytes,requested_at
size_estimates keyspace_name, table_name, range_start, range_end, mean_partition_size, partitions_count Information on partitions
sstable_activity keyspace_name, columnfamily_name, generation, rate_120m, rate_15m
views_builds_in_progress keyspace_name, view_name, generation_number, last_token
Table 2. Columns in system_schema tables
Table name Column name Comment
aggregates keyspace_name, aggregate_name, argument_types, final_func, initcond, return_type, state_func, state_type Information about user-defined aggregates
columns keyspace_name, table_name, column_name, clustering_order, column_name_bytes, kind, position, type Information about table columns
dropped_columns keyspace_name, table_name, column_name, dropped_time, type Information about dropped columns
functions keyspace_name, function_name, argument_types, argument_names, body, called_on_null_input, language, return_type Information on user-defined functions
indexes keyspace_name, table_name, index_name, kind,options Information about indexes
keyspaces keyspace_name, durable_writes, replication Information on keyspace durable writes and replication
tables keyspace_name, table_name, bloom_filter_fp_chance, caching, comment, compaction, compression, crc_check_chance, dclocal_read_repair_chance, default_time_to_live, extensions, flags, gc_grace_seconds, id, max_index_interval, memtable_flush_period_in_ms, min_index_interval, read_repair_chance, speculative_retry Information on columns and column indexes. Used internally for compound primary keys.
triggers keyspace_name, table_name, trigger_name, options Information on triggers
types keyspace_name, type_name, field_names, field_types Information about user-defined types
views keyspace_name, view_name, base_table_id, base_table_name, bloom_filter_fp_chance, caching, comment, compaction, compression, crc_check_chance, dclocal_read_repair_chance, default_time_to_live, extensions, flags,gc_grace_seconds, include_all_columns, max_index_interval, memtable_flush_period_in_ms, min_index_interval, read_repair_chance, speculative_retry, where_clause Information about materialized views
Table 3. Columns in system_distributed tables
Table name Column names Comment
repair_history keyspace_name, columnfamily_name, id, coordinator, exception_message, exception_stacktrace, finished_at, parent_id, participants, range_begin, range_end, started_at, status Contains detailed information on keyspace repair history.

Security keyspaces and tables

Read access to these system tables is implicitly given to every authenticated user because the tables are used by most DSE tools:

system_auth keyspace

Contains authorization and internal authentication data.

Table 4. system_auth tables
Table Columns Description
role_permissions role (PK), resource, permissions Stores the role, resource (for example keyspace_name/table_name), and the permission that the role has to access the resource.
role_members role (PK), member Stores the roles and role members.
roles role (PK), can_login, is_superuser, member_of, salted_hash Stores the role name, whether the role can be used for login, whether the role is a superuser, what other roles the role may be a member of, and a bcrypt salted hash password for the role.

dse_security keyspace

Contains DSE Spark, Kerberos digest data, and role options.

Table 5. dse_security tables
Table Columns Description
role_options role, options Role options.
digest_tokens id, password Kerberos digest tokens when enabled.
spark_security dc, shared_secret Share secret for Spark.