Linux/TimescaleDB: Difference between revisions
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== Setup == | == Setup == | ||
<blockquote> | |||
<pre> | <pre> | ||
CREATE TABLE sensor_data ( | CREATE TABLE sensor_data ( | ||
time TIMESTAMPTZ NOT NULL, | time TIMESTAMPTZ NOT NULL, | ||
topic TEXT, | |||
value DOUBLE PRECISION | value DOUBLE PRECISION | ||
); | ); | ||
</pre> | </pre> | ||
</blockquote> | |||
<blockquote> | |||
<pre> | |||
SELECT create_hypertable('sensor_data', 'time'); | |||
</pre> | |||
</blockquote> | |||
== Insert data via Node-RED == | |||
<blockquote> | |||
<pre> | |||
INSERT INTO sensor_data (time, topic, value) | |||
VALUES ( | |||
now(), | |||
'{{{ msg.topic }}}', | |||
'{{{ msg.payload }}}' | |||
); | |||
</pre> | |||
</blockquote> | |||
== Get table size == | |||
<blockquote> | |||
<pre> | |||
SELECT hypertable_size('sensor_data'); | |||
</pre> | |||
</blockquote> | |||
[[Category:Linux/Services]] | [[Category:Linux/Services]] | ||
[[Category:Linux]] | [[Category:Linux]] | ||
[[Category:Programming]] | |||
Latest revision as of 15:34, 28 September 2024
Setup
CREATE TABLE sensor_data (
time TIMESTAMPTZ NOT NULL,
topic TEXT,
value DOUBLE PRECISION
);
SELECT create_hypertable('sensor_data', 'time');
Insert data via Node-RED
INSERT INTO sensor_data (time, topic, value)
VALUES (
now(),
'{{{ msg.topic }}}',
'{{{ msg.payload }}}'
);
Get table size
SELECT hypertable_size('sensor_data');