Get information on data nodes. This function is specific to running TimescaleDB in a multi-node setup.
Warning
Multi-node support is deprecated.
TimescaleDB v2.13 is the last release that includes multi-node support for PostgreSQL versions 13, 14, and 15.
| Name | Type | Description |
|---|---|---|
node_name | TEXT | Data node name. |
owner | REGCLASS | Oid of the user, who added the data node. |
options | JSONB | Options used when creating the data node. |
Get metadata related to data nodes.
SELECT * FROM timescaledb_information.data_nodes;node_name | owner | options--------------+------------+--------------------------------dn1 | postgres | {host=localhost,port=15431,dbname=test}dn2 | postgres | {host=localhost,port=15432,dbname=test}(2 rows)
Get metadata information about hypertables.
| Name | Type | Description |
|---|---|---|
hypertable_schema | TEXT | Schema name of the hypertable |
hypertable_name | TEXT | Table name of the hypertable |
owner | TEXT | Owner of the hypertable |
num_dimensions | SMALLINT | Number of dimensions |
num_chunks | BIGINT | Number of chunks |
compression_enabled | BOOLEAN | Is compression enabled on the hypertable? |
is_distributed | BOOLEAN | Is the hypertable distributed? |
replication_factor | SMALLINT | Replication factor for a distributed hypertable |
data_nodes | ARRAY | Nodes on which hypertable is distributed |
tablespaces | ARRAY | Tablespaces attached to the hypertable |
Get information about a hypertable.
CREATE TABLE dist_table(time timestamptz, device int, temp float);SELECT create_distributed_hypertable('dist_table', 'time', 'device', replication_factor => 2);SELECT * FROM timescaledb_information.hypertablesWHERE hypertable_name = 'dist_table';-[ RECORD 1 ]-------+-----------hypertable_schema | publichypertable_name | dist_tableowner | postgresnum_dimensions | 2num_chunks | 3compression_enabled | fis_distributed | treplication_factor | 2data_nodes | {node_1, node_2}tablespaces |
Keywords
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