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Implement the basic form of UNNEST, ie unnest(anyarray) returns setof

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anyelement.  This lacks the WITH ORDINALITY option, as well as the multiple
input arrays option added in the most recent SQL specs.  But it's still a
pretty useful subset of the spec's functionality, and it is enough to
allow obsoleting contrib/intagg.
This commit is contained in:
Tom Lane
2008-11-14 00:51:47 +00:00
parent 5b9453bcd3
commit c889ebce0a
7 changed files with 193 additions and 6 deletions
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7
src/test/regress/sql/arrays.sql
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@ -402,3 +402,10 @@ select array_agg(nullif(ten, 4)) from tenk1 where unique1 < 15;
select cardinality(array_agg(unique1)) from tenk1 where unique1 < 15;
select array_agg(unique1) from (select * from tenk1 order by unique1 asc) as tab where unique1 < 15;
select array_agg(unique1) from tenk1 where unique1 < -15;
select unnest(array[1,2,3]);
select * from unnest(array[1,2,3]);
select unnest(array[1,2,3,4.5]::float8[]);
select unnest(array[1,2,3,4.5]::numeric[]);
select unnest(array[1,2,3,null,4,null,null,5,6]);
select unnest(array[1,2,3,null,4,null,null,5,6]::text[]);