mirror of https://github.com/citusdata/citus.git
59 lines
1.5 KiB
SQL
59 lines
1.5 KiB
SQL
--
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-- MULTI_AVERAGE_EXPRESSION_ORDER
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--
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-- This test checks that the group-by columns don't need to be above an average
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-- expression, and can be anywhere in the projection order. This is in response
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-- to a bug we had due to the average expression introducing new columns.
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ALTER SEQUENCE pg_catalog.pg_dist_shardid_seq RESTART 450000;
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ALTER SEQUENCE pg_catalog.pg_dist_jobid_seq RESTART 450000;
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SELECT
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sum(l_quantity) as sum_qty,
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sum(l_extendedprice) as sum_base_price,
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sum(l_extendedprice * (1 - l_discount)) as sum_disc_price,
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sum(l_extendedprice * (1 - l_discount) * (1 + l_tax)) as sum_charge,
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avg(l_quantity) as avg_qty,
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avg(l_extendedprice) as avg_price,
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avg(l_discount) as avg_disc,
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count(*) as count_order,
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l_returnflag,
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l_linestatus
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FROM
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lineitem
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WHERE
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l_shipdate <= date '1998-12-01' - interval '90 days'
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GROUP BY
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l_returnflag,
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l_linestatus
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ORDER BY
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l_returnflag,
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l_linestatus;
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-- These tests check that distributed averages only consider non-null input
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-- values. This is in response to a bug we had due to the distributed average
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-- using sum(expression)/count(*) to calculate avg(expression). We now use the
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-- correct form sum(expression)/count(expression) for average calculations.
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-- Run avg() on an expression that contains some null values
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SELECT
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avg(case
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when l_quantity > 20
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then l_quantity
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end)
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FROM
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lineitem;
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-- Run avg() on an expression that contains only null values
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SELECT
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avg(case
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when l_quantity > 5000
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then l_quantity
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end)
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FROM
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lineitem;
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