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c2bfc5d17c
This patch changes DELETE handling for hypertables to have the postgres ModifyTable node be wrapped in a custom HypertableModify node. By itself this does not change DELETE handling for hypertables but instead enables subsequent patches to implement e.g. chunk exclusion for DELETE or DELETE on compressed chunks. Since PG 14 codepath for INSERT is different from previous versions this PR will only change the plan for PG14+. DELETE handling for distributed hypertables is not changed as part of this patch.
50 lines
1.7 KiB
MySQL
50 lines
1.7 KiB
MySQL
-- 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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\o /dev/null
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\ir include/insert_two_partitions.sql
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\o
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SELECT * FROM "two_Partitions" ORDER BY "timeCustom", device_id, series_0, series_1;
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DELETE FROM "two_Partitions" WHERE series_0 = 1.5;
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DELETE FROM "two_Partitions" WHERE series_0 = 100;
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SELECT * FROM "two_Partitions" ORDER BY "timeCustom", device_id, series_0, series_1;
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-- Make sure DELETE isn't optimized if it includes Append plans
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-- Need to turn of nestloop to make append appear the same on PG96 and PG10
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set enable_nestloop = 'off';
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CREATE OR REPLACE FUNCTION series_val()
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RETURNS integer LANGUAGE PLPGSQL STABLE AS
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$BODY$
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BEGIN
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RETURN 5;
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END;
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$BODY$;
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-- ConstraintAwareAppend applied for SELECT
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EXPLAIN (costs off)
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SELECT FROM "two_Partitions"
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WHERE series_1 IN (SELECT series_1 FROM "two_Partitions" WHERE series_1 > series_val());
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-- ConstraintAwareAppend NOT applied for DELETE
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EXPLAIN (costs off)
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DELETE FROM "two_Partitions"
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WHERE series_1 IN (SELECT series_1 FROM "two_Partitions" WHERE series_1 > series_val());
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SELECT * FROM "two_Partitions" ORDER BY "timeCustom", device_id, series_0, series_1;
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BEGIN;
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DELETE FROM "two_Partitions"
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WHERE series_1 IN (SELECT series_1 FROM "two_Partitions" WHERE series_1 > series_val());
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SELECT * FROM "two_Partitions" ORDER BY "timeCustom", device_id, series_0, series_1;
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ROLLBACK;
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BEGIN;
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DELETE FROM "two_Partitions"
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WHERE series_1 IN (SELECT series_1 FROM "two_Partitions" WHERE series_1 > series_val()) RETURNING "timeCustom";
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SELECT * FROM "two_Partitions" ORDER BY "timeCustom", device_id, series_0, series_1;
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ROLLBACK;
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