mirror of
https://github.com/timescale/timescaledb.git
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bfe58b61f7
Clean up the table schema to get rid of legacy tables and functionality that makes it more difficult to provide an upgrade path. Notable changes: * Get rid of legacy tables and code * Simplify directory structure for SQL code * Simplify table hierarchy: remove root table and make chunk tables * inherit directly from main table * Change chunk table suffix from _data to _chunk * Simplify schema usage: _timescaledb_internal for internal functions. * _timescaledb_catalog for metadata tables. * Remove postgres_fdw dependency * Improve code comments in sql code
60 lines
2.4 KiB
SQL
60 lines
2.4 KiB
SQL
-- time_bucket returns the left edge of the bucket where ts falls into.
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-- Buckets span an interval of time equal to the bucket_width and are aligned with the epoch.
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CREATE OR REPLACE FUNCTION public.time_bucket(bucket_width INTERVAL, ts TIMESTAMP) RETURNS TIMESTAMP
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AS '$libdir/timescaledb', 'timestamp_bucket' LANGUAGE C IMMUTABLE PARALLEL SAFE;
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-- bucketing of timestamptz happens at UTC time
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CREATE OR REPLACE FUNCTION public.time_bucket(bucket_width INTERVAL, ts TIMESTAMPTZ) RETURNS TIMESTAMPTZ
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AS '$libdir/timescaledb', 'timestamptz_bucket' LANGUAGE C IMMUTABLE PARALLEL SAFE;
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-- If an interval is given as the third argument, the bucket alignment is offset by the interval.
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CREATE OR REPLACE FUNCTION public.time_bucket(bucket_width INTERVAL, ts TIMESTAMP, "offset" INTERVAL)
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RETURNS TIMESTAMP LANGUAGE SQL IMMUTABLE PARALLEL SAFE AS
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$BODY$
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SELECT public.time_bucket(bucket_width, ts-"offset")+"offset";
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$BODY$;
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CREATE OR REPLACE FUNCTION public.time_bucket(bucket_width INTERVAL, ts TIMESTAMPTZ, "offset" INTERVAL)
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RETURNS TIMESTAMPTZ LANGUAGE SQL IMMUTABLE PARALLEL SAFE AS
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$BODY$
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SELECT public.time_bucket(bucket_width, ts-"offset")+"offset";
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$BODY$;
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CREATE OR REPLACE FUNCTION public.time_bucket(bucket_width BIGINT, ts BIGINT)
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RETURNS BIGINT LANGUAGE SQL IMMUTABLE PARALLEL SAFE AS
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$BODY$
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SELECT (ts / bucket_width)*bucket_width;
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$BODY$;
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CREATE OR REPLACE FUNCTION public.time_bucket(bucket_width INT, ts INT)
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RETURNS INT LANGUAGE SQL IMMUTABLE PARALLEL SAFE AS
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$BODY$
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SELECT (ts / bucket_width)*bucket_width;
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$BODY$;
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CREATE OR REPLACE FUNCTION public.time_bucket(bucket_width SMALLINT, ts SMALLINT)
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RETURNS SMALLINT LANGUAGE SQL IMMUTABLE PARALLEL SAFE AS
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$BODY$
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SELECT (ts / bucket_width)*bucket_width;
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$BODY$;
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CREATE OR REPLACE FUNCTION public.time_bucket(bucket_width BIGINT, ts BIGINT, "offset" BIGINT)
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RETURNS BIGINT LANGUAGE SQL IMMUTABLE PARALLEL SAFE AS
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$BODY$
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SELECT (((ts-"offset") / bucket_width)*bucket_width)+"offset";
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$BODY$;
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CREATE OR REPLACE FUNCTION public.time_bucket(bucket_width INT, ts INT, "offset" INT)
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RETURNS INT LANGUAGE SQL IMMUTABLE PARALLEL SAFE AS
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$BODY$
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SELECT (((ts-"offset") / bucket_width)*bucket_width)+"offset";
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$BODY$;
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CREATE OR REPLACE FUNCTION public.time_bucket(bucket_width SMALLINT, ts SMALLINT, "offset" SMALLINT)
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RETURNS SMALLINT LANGUAGE SQL IMMUTABLE PARALLEL SAFE AS
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$BODY$
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SELECT (((ts-"offset") / bucket_width)*bucket_width)+"offset";
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$BODY$;
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