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e10b437712
This change renames function to approximate_row_count() and adds support for regular tables. Return a row count estimate for a table instead of a table list.
175 lines
9.5 KiB
SQL
175 lines
9.5 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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\ir include/insert_two_partitions.sql
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SELECT * FROM hypertable_detailed_size('"public"."two_Partitions"');
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SELECT * FROM hypertable_index_size('"public"."two_Partitions_device_id_timeCustom_idx"');
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SELECT * FROM hypertable_index_size('"public"."two_Partitions_timeCustom_device_id_idx"');
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SELECT * FROM hypertable_index_size('"public"."two_Partitions_timeCustom_idx"');
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SELECT * FROM hypertable_index_size('"public"."two_Partitions_timeCustom_series_0_idx"');
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SELECT * FROM hypertable_index_size('"public"."two_Partitions_timeCustom_series_1_idx"');
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SELECT * FROM hypertable_index_size('"public"."two_Partitions_timeCustom_series_2_idx"');
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SELECT * FROM hypertable_index_size('"public"."two_Partitions_timeCustom_series_bool_idx"');
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SELECT * FROM chunks_detailed_size('"public"."two_Partitions"') order by chunk_name;
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CREATE TABLE timestamp_partitioned(time TIMESTAMP, value TEXT);
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SELECT * FROM create_hypertable('timestamp_partitioned', 'time', 'value', 2);
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INSERT INTO timestamp_partitioned VALUES('2004-10-19 10:23:54', '10');
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INSERT INTO timestamp_partitioned VALUES('2004-12-19 10:23:54', '30');
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SELECT * FROM chunks_detailed_size('timestamp_partitioned') order by chunk_name;
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CREATE TABLE timestamp_partitioned_2(time TIMESTAMP, value CHAR(9));
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SELECT * FROM create_hypertable('timestamp_partitioned_2', 'time', 'value', 2);
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INSERT INTO timestamp_partitioned_2 VALUES('2004-10-19 10:23:54', '10');
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INSERT INTO timestamp_partitioned_2 VALUES('2004-12-19 10:23:54', '30');
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SELECT * FROM chunks_detailed_size('timestamp_partitioned_2') order by chunk_name;
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CREATE TABLE toast_test(time TIMESTAMP, value TEXT);
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-- Set storage type to EXTERNAL to prevent PostgreSQL from compressing my
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-- easily compressable string and instead store it with TOAST
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ALTER TABLE toast_test ALTER COLUMN value SET STORAGE EXTERNAL;
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SELECT * FROM create_hypertable('toast_test', 'time');
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INSERT INTO toast_test VALUES('2004-10-19 10:23:54', $$
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this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k. this must be over 2k.
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$$);
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SELECT * FROM chunks_detailed_size('toast_test');
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-- Tests for approximate_row_count()
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--
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-- Regular table
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--
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CREATE TABLE approx_count(time TIMESTAMP, value int);
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INSERT INTO approx_count VALUES('2004-01-01 10:00:01', 1);
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INSERT INTO approx_count VALUES('2004-01-01 10:00:02', 2);
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INSERT INTO approx_count VALUES('2004-01-01 10:00:03', 3);
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INSERT INTO approx_count VALUES('2004-01-01 10:00:04', 4);
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INSERT INTO approx_count VALUES('2004-01-01 10:00:05', 5);
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INSERT INTO approx_count VALUES('2004-01-01 10:00:06', 6);
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INSERT INTO approx_count VALUES('2004-01-01 10:00:07', 7);
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SELECT * FROM approximate_row_count('approx_count');
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ANALYZE approx_count;
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SELECT count(*) FROM approx_count;
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SELECT * FROM approximate_row_count('approx_count');
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DROP TABLE approx_count;
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-- Regular table with basic inheritance
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--
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CREATE TABLE approx_count(id int);
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CREATE TABLE approx_count_child(id2 int) INHERITS (approx_count);
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INSERT INTO approx_count_child VALUES(0);
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INSERT INTO approx_count VALUES(1);
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SELECT count(*) FROM approx_count;
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SELECT * FROM approximate_row_count('approx_count');
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ANALYZE approx_count;
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SELECT * FROM approximate_row_count('approx_count');
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ANALYZE approx_count_child;
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SELECT * FROM approximate_row_count('approx_count');
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DROP TABLE approx_count CASCADE;
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-- Regular table with nested inheritance
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--
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CREATE TABLE approx_count(id int);
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CREATE TABLE approx_count_a(id2 int) INHERITS (approx_count);
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CREATE TABLE approx_count_b(id3 int) INHERITS (approx_count_a);
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CREATE TABLE approx_count_c(id4 int) INHERITS (approx_count_b);
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INSERT INTO approx_count_a VALUES(0);
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INSERT INTO approx_count_b VALUES(1);
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INSERT INTO approx_count_c VALUES(2);
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INSERT INTO approx_count VALUES(3);
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SELECT * FROM approximate_row_count('approx_count');
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ANALYZE approx_count_a;
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ANALYZE approx_count_b;
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ANALYZE approx_count_c;
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ANALYZE approx_count;
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SELECT count(*) FROM approx_count;
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SELECT * FROM approximate_row_count('approx_count');
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SELECT count(*) FROM approx_count_a;
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SELECT * FROM approximate_row_count('approx_count_a');
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SELECT count(*) FROM approx_count_b;
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SELECT * FROM approximate_row_count('approx_count_b');
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SELECT count(*) FROM approx_count_c;
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SELECT * FROM approximate_row_count('approx_count_c');
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DROP TABLE approx_count CASCADE;
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-- Regular table with declarative partitioning
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--
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CREATE TABLE approx_count_dp(time TIMESTAMP, value int) PARTITION BY RANGE(time);
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CREATE TABLE approx_count_dp0 PARTITION OF approx_count_dp
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FOR VALUES FROM ('2004-01-01 00:00:00') TO ('2005-01-01 00:00:00');
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CREATE TABLE approx_count_dp1 PARTITION OF approx_count_dp
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FOR VALUES FROM ('2005-01-01 00:00:00') TO ('2006-01-01 00:00:00');
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CREATE TABLE approx_count_dp2 PARTITION OF approx_count_dp
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FOR VALUES FROM ('2006-01-01 00:00:00') TO ('2007-01-01 00:00:00');
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INSERT INTO approx_count_dp VALUES('2004-01-01 10:00:00', 1);
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INSERT INTO approx_count_dp VALUES('2004-01-01 11:00:00', 1);
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INSERT INTO approx_count_dp VALUES('2004-01-01 12:00:01', 1);
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INSERT INTO approx_count_dp VALUES('2005-01-01 10:00:00', 1);
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INSERT INTO approx_count_dp VALUES('2005-01-01 11:00:00', 1);
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INSERT INTO approx_count_dp VALUES('2005-01-01 12:00:01', 1);
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INSERT INTO approx_count_dp VALUES('2006-01-01 10:00:00', 1);
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INSERT INTO approx_count_dp VALUES('2006-01-01 11:00:00', 1);
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INSERT INTO approx_count_dp VALUES('2006-01-01 12:00:01', 1);
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SELECT count(*) FROM approx_count_dp;
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SELECT count(*) FROM approx_count_dp0;
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SELECT count(*) FROM approx_count_dp1;
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SELECT count(*) FROM approx_count_dp2;
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SELECT * FROM approximate_row_count('approx_count_dp');
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ANALYZE approx_count_dp;
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SELECT * FROM approximate_row_count('approx_count_dp');
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SELECT * FROM approximate_row_count('approx_count_dp0');
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SELECT * FROM approximate_row_count('approx_count_dp1');
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SELECT * FROM approximate_row_count('approx_count_dp2');
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-- Hypertable
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--
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CREATE TABLE approx_count(time TIMESTAMP, value int);
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SELECT * FROM create_hypertable('approx_count', 'time');
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INSERT INTO approx_count VALUES('2004-01-01 10:00:01', 1);
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INSERT INTO approx_count VALUES('2004-01-01 10:00:02', 2);
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INSERT INTO approx_count VALUES('2004-01-01 10:00:03', 3);
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INSERT INTO approx_count VALUES('2004-01-01 10:00:04', 4);
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INSERT INTO approx_count VALUES('2004-01-01 10:00:05', 5);
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INSERT INTO approx_count VALUES('2004-01-01 10:00:06', 6);
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INSERT INTO approx_count VALUES('2004-01-01 10:00:07', 7);
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INSERT INTO approx_count VALUES('2004-01-01 10:00:08', 8);
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INSERT INTO approx_count VALUES('2004-01-01 10:00:09', 9);
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INSERT INTO approx_count VALUES('2004-01-01 10:00:10', 10);
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SELECT count(*) FROM approx_count;
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SELECT * FROM approximate_row_count('approx_count');
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ANALYZE approx_count;
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SELECT * FROM approximate_row_count('approx_count');
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\set ON_ERROR_STOP 0
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SELECT * FROM approximate_row_count('unexisting');
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SELECT * FROM approximate_row_count();
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SELECT * FROM approximate_row_count(NULL);
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\set ON_ERROR_STOP 1
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SELECT * FROM chunks_detailed_size(NULL);
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SELECT * FROM hypertable_detailed_size(NULL);
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SELECT * FROM hypertable_index_size(NULL);
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-- tests with tables that are not hypertables
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CREATE TABLE regtab( a integer, b integer);
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CREATE INDEX regtab_idx ON regtab( a);
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SELECT * FROM hypertable_index_size('regtab_idx');
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