attach_tablespace()

Attach a tablespace to a hypertable and use it to store chunks. A [tablespace][postgres-tablespaces] is a directory on the filesystem that allows control over where individual tables and indexes are stored on the filesystem. A common use case is to create a tablespace for a particular storage disk, allowing tables to be stored there. Please review the standard PostgreSQL documentation for more [information on tablespaces][postgres-tablespaces].

TimescaleDB can manage a set of tablespaces for each hypertable, automatically spreading chunks across the set of tablespaces attached to a hypertable. If a hypertable is hash partitioned, TimescaleDB will try to place chunks that belong to the same partition in the same tablespace. Changing the set of tablespaces attached to a hypertable may also change the placement behavior. A hypertable with no attached tablespaces will have its chunks placed in the database’s default tablespace.

Required Arguments

Tablespaces need to be [created][postgres-createtablespace] before being attached to a hypertable. Once created, tablespaces can be attached to multiple hypertables simultaneously to share the underlying disk storage. Associating a regular table with a tablespace using the TABLESPACE option to CREATE TABLE, prior to calling create_hypertable, will have the same effect as calling attach_tablespace immediately following create_hypertable.

Optional Arguments

Sample Usage

Attach the tablespace disk1 to the hypertable conditions:

SELECT attach_tablespace('disk1', 'conditions');
SELECT attach_tablespace('disk2', 'conditions', if_not_attached => true);