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https://github.com/timescale/timescaledb.git
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89cb73318d
This patch adds full support for window functions to gapfill queries. The targetlist for the gapfill node is built from the final targetlist and pushed down until aggregation node. locf and interpolate function calls will be toplevel function calls in the targetlist of the gapfill node. This patch changes gapfill code to no longer remove the marker function calls from the plans to allow PostgreSQL to properly identify subexpressions in targetlist.
43 lines
2.6 KiB
SQL
43 lines
2.6 KiB
SQL
-- This file and its contents are licensed under the Apache License 2.0.
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-- Please see the included NOTICE for copyright information and
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-- LICENSE-APACHE for a copy of the license.
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CREATE OR REPLACE FUNCTION time_bucket_gapfill(bucket_width SMALLINT, ts SMALLINT, start SMALLINT=NULL, finish SMALLINT=NULL) RETURNS SMALLINT
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AS '@MODULE_PATHNAME@', 'ts_gapfill_int16_bucket' LANGUAGE C VOLATILE PARALLEL SAFE;
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CREATE OR REPLACE FUNCTION time_bucket_gapfill(bucket_width INT, ts INT, start INT=NULL, finish INT=NULL) RETURNS INT
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AS '@MODULE_PATHNAME@', 'ts_gapfill_int32_bucket' LANGUAGE C VOLATILE PARALLEL SAFE;
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CREATE OR REPLACE FUNCTION time_bucket_gapfill(bucket_width BIGINT, ts BIGINT, start BIGINT=NULL, finish BIGINT=NULL) RETURNS BIGINT
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AS '@MODULE_PATHNAME@', 'ts_gapfill_int64_bucket' LANGUAGE C VOLATILE PARALLEL SAFE;
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CREATE OR REPLACE FUNCTION time_bucket_gapfill(bucket_width INTERVAL, ts DATE, start DATE=NULL, finish DATE=NULL) RETURNS DATE
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AS '@MODULE_PATHNAME@', 'ts_gapfill_date_bucket' LANGUAGE C VOLATILE PARALLEL SAFE;
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CREATE OR REPLACE FUNCTION time_bucket_gapfill(bucket_width INTERVAL, ts TIMESTAMP, start TIMESTAMP=NULL, finish TIMESTAMP=NULL) RETURNS TIMESTAMP
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AS '@MODULE_PATHNAME@', 'ts_gapfill_timestamp_bucket' LANGUAGE C VOLATILE PARALLEL SAFE;
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CREATE OR REPLACE FUNCTION time_bucket_gapfill(bucket_width INTERVAL, ts TIMESTAMPTZ, start TIMESTAMPTZ=NULL, finish TIMESTAMPTZ=NULL) RETURNS TIMESTAMPTZ
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AS '@MODULE_PATHNAME@', 'ts_gapfill_timestamptz_bucket' LANGUAGE C VOLATILE PARALLEL SAFE;
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-- locf function
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CREATE OR REPLACE FUNCTION locf(value ANYELEMENT, prev ANYELEMENT=NULL, treat_null_as_missing BOOL=false) RETURNS ANYELEMENT
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AS '@MODULE_PATHNAME@', 'ts_gapfill_marker' LANGUAGE C VOLATILE PARALLEL SAFE;
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-- interpolate functions
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CREATE OR REPLACE FUNCTION interpolate(value SMALLINT,prev RECORD=NULL,next RECORD=NULL) RETURNS SMALLINT
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AS '@MODULE_PATHNAME@', 'ts_gapfill_marker' LANGUAGE C VOLATILE PARALLEL SAFE;
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CREATE OR REPLACE FUNCTION interpolate(value INT,prev RECORD=NULL,next RECORD=NULL) RETURNS INT
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AS '@MODULE_PATHNAME@', 'ts_gapfill_marker' LANGUAGE C VOLATILE PARALLEL SAFE;
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CREATE OR REPLACE FUNCTION interpolate(value BIGINT,prev RECORD=NULL,next RECORD=NULL) RETURNS BIGINT
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AS '@MODULE_PATHNAME@', 'ts_gapfill_marker' LANGUAGE C VOLATILE PARALLEL SAFE;
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CREATE OR REPLACE FUNCTION interpolate(value REAL,prev RECORD=NULL,next RECORD=NULL) RETURNS REAL
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AS '@MODULE_PATHNAME@', 'ts_gapfill_marker' LANGUAGE C VOLATILE PARALLEL SAFE;
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CREATE OR REPLACE FUNCTION interpolate(value FLOAT,prev RECORD=NULL,next RECORD=NULL) RETURNS FLOAT
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AS '@MODULE_PATHNAME@', 'ts_gapfill_marker' LANGUAGE C VOLATILE PARALLEL SAFE;
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