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Aggregate small number of text items in overviews

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Instead of nulling text fields for non-singleton aggregated records
concatenate distinct text values when they're few (5 or less).
Fixes #231
This commit is contained in:
Javier Goizueta
2016-04-15 12:37:16 +02:00
parent 20989e2f28
commit 45f063d469
2 changed files with 29 additions and 12 deletions
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4
test/CDB_OverviewsTest_expect
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@@ -12,8 +12,8 @@ SELECT 1114
{_vovw_2_base_bare_t,_vovw_1_base_bare_t,_vovw_0_base_bare_t}
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number,int_number,name,start
SUM(number*1)/count(*)::double precision AS number,SUM(int_number*1)/count(*)::integer AS int_number,CASE count(*) WHEN 1 THEN MIN(name) ELSE NULL END::text AS name,CASE count(*) WHEN 1 THEN MIN(start) ELSE NULL END::date AS start
SUM(tab.number*1)/count(*)::double precision AS number,SUM(tab.int_number*1)/count(*)::integer AS int_number,CASE count(*) WHEN 1 THEN MIN(tab.name) ELSE NULL END::text AS name,CASE count(*) WHEN 1 THEN MIN(tab.start) ELSE NULL END::date AS start
SUM(number*1)/count(*)::double precision AS number,SUM(int_number*1)/count(*)::integer AS int_number,CASE WHEN count(*) = 1 THEN MIN(name) WHEN count(*) < 5 THEN string_agg(distinct name,' / ') ELSE '*' END::text AS name,CASE count(*) WHEN 1 THEN MIN(start) ELSE NULL END::date AS start
SUM(tab.number*1)/count(*)::double precision AS number,SUM(tab.int_number*1)/count(*)::integer AS int_number,CASE WHEN count(*) = 1 THEN MIN(tab.name) WHEN count(*) < 5 THEN string_agg(distinct tab.name,' / ') ELSE '*' END::text AS name,CASE count(*) WHEN 1 THEN MIN(tab.start) ELSE NULL END::date AS start
{_vovw_2_base_t,_vovw_1_base_t,_vovw_0_base_t}
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