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https://github.com/timescale/timescaledb.git
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0f3e74215a
This simplifies the code and the access to the min/max metadata. Before we used a custom type, but now the min/max are just the same type as the underlying column and stored as two columns. This also removes the custom type that was used before.
149 lines
4.2 KiB
SQL
149 lines
4.2 KiB
SQL
-- This file and its contents are licensed under the Timescale License.
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-- Please see the included NOTICE for copyright information and
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-- LICENSE-TIMESCALE for a copy of the license.
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\c :TEST_DBNAME :ROLE_SUPERUSER
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CREATE OR REPLACE FUNCTION _timescaledb_internal.tsl_segment_meta_min_max_append(internal, ANYELEMENT)
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RETURNS internal
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AS :TSL_MODULE_PATHNAME, 'tsl_segment_meta_min_max_append'
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LANGUAGE C IMMUTABLE PARALLEL SAFE;
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CREATE OR REPLACE FUNCTION _timescaledb_internal.tsl_segment_meta_min_max_finish_max(internal, ANYELEMENT)
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RETURNS anyelement
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AS :TSL_MODULE_PATHNAME, 'tsl_segment_meta_min_max_finish_max'
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LANGUAGE C IMMUTABLE PARALLEL SAFE;
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CREATE OR REPLACE FUNCTION _timescaledb_internal.tsl_segment_meta_min_max_finish_min(internal, ANYELEMENT)
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RETURNS anyelement
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AS :TSL_MODULE_PATHNAME, 'tsl_segment_meta_min_max_finish_min'
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LANGUAGE C IMMUTABLE PARALLEL SAFE;
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CREATE AGGREGATE _timescaledb_internal.segment_meta_min_max_agg_min(ANYELEMENT) (
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STYPE = internal,
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SFUNC = _timescaledb_internal.tsl_segment_meta_min_max_append,
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FINALFUNC = _timescaledb_internal.tsl_segment_meta_min_max_finish_min,
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FINALFUNC_EXTRA
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);
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CREATE AGGREGATE _timescaledb_internal.segment_meta_min_max_agg_max(ANYELEMENT) (
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STYPE = internal,
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SFUNC = _timescaledb_internal.tsl_segment_meta_min_max_append,
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FINALFUNC = _timescaledb_internal.tsl_segment_meta_min_max_finish_max,
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FINALFUNC_EXTRA
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);
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\ir include/rand_generator.sql
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\c :TEST_DBNAME :ROLE_DEFAULT_PERM_USER
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CREATE TABLE metric (i int);
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insert into metric select i from generate_series(1, 10) i;
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\set TYPE int
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\set TABLE metric
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\ir include/compression_test_segment_meta.sql
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----NULL tests
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--First
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truncate metric;
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insert into metric select NULLIF(i,1) from generate_series(1, 10) i;
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\ir include/compression_test_segment_meta.sql
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--Last
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truncate metric;
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insert into metric select NULLIF(i,10) from generate_series(1, 10) i;
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\ir include/compression_test_segment_meta.sql
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--Middle
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truncate metric;
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insert into metric select NULLIF(i,5) from generate_series(1, 10) i;
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\ir include/compression_test_segment_meta.sql
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--All NULLS should return null object
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truncate metric;
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insert into metric select NULL from generate_series(1, 10) i;
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SELECT
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_timescaledb_internal.segment_meta_min_max_agg_min(i) is null,
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_timescaledb_internal.segment_meta_min_max_agg_max(i) is null
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FROM metric;
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--
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--type tests
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--
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--untoasted text
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CREATE TABLE base_texts AS SELECT
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repeat(item::text, 1) as i
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FROM
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(SELECT sub.item from
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(SELECT generate_series(1, 10) item) as sub
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ORDER BY gen_rand_minstd()
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) sub;
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\set TYPE text
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\set TABLE base_texts
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\ir include/compression_test_segment_meta.sql
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--toasted text
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DROP TABLE base_texts;
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CREATE TABLE base_texts AS SELECT
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repeat(item::text, 100000) as i
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FROM
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(SELECT sub.item from
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(SELECT generate_series(1, 10) item) as sub
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ORDER BY gen_rand_minstd()
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) sub;
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--make sure it's toasted
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SELECT pg_total_relation_size(reltoastrelid)
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FROM pg_class c
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WHERE relname = 'base_texts';
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\ir include/compression_test_segment_meta.sql
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--name is a fixed-length pass by reference type
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CREATE TABLE base_name AS SELECT
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item::name as i
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FROM
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(SELECT sub.item from
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(SELECT generate_series(1, 10) item) as sub
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ORDER BY gen_rand_minstd()
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) sub;
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\set TYPE name
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\set TABLE base_name
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\ir include/compression_test_segment_meta.sql
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--array
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CREATE TABLE text_array AS SELECT
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array[item::text, 'abab'] as i
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FROM
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(SELECT sub.item from
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(SELECT generate_series(1, 10) item) as sub
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ORDER BY gen_rand_minstd()
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) sub;
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\set TYPE text[]
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\set TABLE text_array
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\ir include/compression_test_segment_meta.sql
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--Points doesn't have an ordering so make sure it errors
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CREATE TABLE points AS SELECT
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point '(0,1)' as i
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FROM
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(SELECT sub.item from
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(SELECT generate_series(1, 10) item) as sub
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ORDER BY gen_rand_minstd()
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) sub;
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\set ON_ERROR_STOP 0
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SELECT
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_timescaledb_internal.segment_meta_min_max_agg_max(i)
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FROM points;
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SELECT
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_timescaledb_internal.segment_meta_min_max_agg_min(i)
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FROM points;
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\set ON_ERROR_STOP 1
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