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Using pg_dump/pg_restore for a database with hypertables will back up all internal tables too, which is sometimes not desired. These scripts allow one to backup regular PostgreSQL tables separately and then pick and choose which hypertables to backup and restore. This also provides a forward-compatible way of backing up and restoring hypertables, since data is dumped to CSV and restored by re-creating and re-inserting the data.
64 lines
2.7 KiB
SQL
64 lines
2.7 KiB
SQL
\ir include/create_single_db.sql
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create schema test_schema;
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create table test_schema.test_table(time BIGINT, temp float8, device_id text, device_type text, location text, id int, id2 int);
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\set ON_ERROR_STOP 0
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-- get_create_command should fail since hypertable isn't made yet
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SELECT * FROM _timescaledb_internal.get_create_command('test_table');
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\set ON_ERROR_STOP 1
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\dt "test_schema".*
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select * from create_hypertable('test_schema.test_table', 'time', 'device_id', 2, chunk_time_interval=>_timescaledb_internal.interval_to_usec('1 month'));
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SELECT * FROM _timescaledb_internal.get_create_command('test_table');
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--test adding one more closed dimension
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select add_dimension('test_schema.test_table', 'location', 2);
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select * from _timescaledb_catalog.hypertable where table_name = 'test_table';
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select * from _timescaledb_catalog.dimension;
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\set ON_ERROR_STOP 0
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-- get_create_command only works on tables w/ 1 or 2 dimensions
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SELECT * FROM _timescaledb_internal.get_create_command('test_table');
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\set ON_ERROR_STOP 1
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--test adding one more open dimension
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select add_dimension('test_schema.test_table', 'id', interval_length => 1000);
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select * from _timescaledb_catalog.hypertable where table_name = 'test_table';
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select * from _timescaledb_catalog.dimension;
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\set ON_ERROR_STOP 0
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--adding the same dimension twice should fail
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select add_dimension('test_schema.test_table', 'location', 2);
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--adding dimension with both number_partitions and interval_length should fail
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select add_dimension('test_schema.test_table', 'id2', number_partitions => 2, interval_length => 1000);
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--adding a new dimension on a non-empty table should also fail
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insert into test_schema.test_table values (123456789, 23.8, 'blue', 'type1', 'nyc', 1, 1);
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select add_dimension('test_schema.test_table', 'device_type', 2);
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\set ON_ERROR_STOP 1
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--test partitioning in only time dimension
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create table test_schema.test_1dim(time timestamp, temp float);
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select create_hypertable('test_schema.test_1dim', 'time');
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SELECT * FROM _timescaledb_internal.get_create_command('test_1dim');
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\dt "test_schema".*
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select create_hypertable('test_schema.test_1dim', 'time', if_not_exists => true);
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-- Should error when creating again without if_not_exists set to true
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\set ON_ERROR_STOP 0
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select create_hypertable('test_schema.test_1dim', 'time');
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\set ON_ERROR_STOP 1
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-- if_not_exist should also work with data in the hypertable
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insert into test_schema.test_1dim VALUES ('2004-10-19 10:23:54+02', 1.0);
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select create_hypertable('test_schema.test_1dim', 'time', if_not_exists => true);
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-- Should error when creating again without if_not_exists set to true
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\set ON_ERROR_STOP 0
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select create_hypertable('test_schema.test_1dim', 'time');
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\set ON_ERROR_STOP 1
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