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postgresql/src/test/regress/sql/psql.sql
Alvaro Herrera c09b18f21c Support \crosstabview in psql 
\crosstabview is a completely different way to display results from a
query: instead of a vertical display of rows, the data values are placed
in a grid where the column and row headers come from the data itself,
similar to a spreadsheet.

The sort order of the horizontal header can be specified by using
another column in the query, and the vertical header determines its
ordering from the order in which they appear in the query.

This only allows displaying a single value in each cell.  If more than
one value correspond to the same cell, an error is thrown.  Merging of
values can be done in the query itself, if necessary.  This may be
revisited in the future.

Author: Daniel Verité
Reviewed-by: Pavel Stehule, Dean Rasheed
2016-04-08 20:23:18 -03:00

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--
-- Tests for psql features that aren't closely connected to any
-- specific server features
--
-- \gset
select 10 as test01, 20 as test02, 'Hello' as test03 \gset pref01_
\echo :pref01_test01 :pref01_test02 :pref01_test03
-- should fail: bad variable name
select 10 as "bad name"
\gset
-- multiple backslash commands in one line
select 1 as x, 2 as y \gset pref01_ \\ \echo :pref01_x
select 3 as x, 4 as y \gset pref01_ \echo :pref01_x \echo :pref01_y
select 5 as x, 6 as y \gset pref01_ \\ \g \echo :pref01_x :pref01_y
select 7 as x, 8 as y \g \gset pref01_ \echo :pref01_x :pref01_y
-- NULL should unset the variable
\set var2 xyz
select 1 as var1, NULL as var2, 3 as var3 \gset
\echo :var1 :var2 :var3
-- \gset requires just one tuple
select 10 as test01, 20 as test02 from generate_series(1,3) \gset
select 10 as test01, 20 as test02 from generate_series(1,0) \gset
-- \gset should work in FETCH_COUNT mode too
\set FETCH_COUNT 1
select 1 as x, 2 as y \gset pref01_ \\ \echo :pref01_x
select 3 as x, 4 as y \gset pref01_ \echo :pref01_x \echo :pref01_y
select 10 as test01, 20 as test02 from generate_series(1,3) \gset
select 10 as test01, 20 as test02 from generate_series(1,0) \gset
\unset FETCH_COUNT
-- \gexec
create temporary table gexec_test(a int, b text, c date, d float);
select format('create index on gexec_test(%I)', attname)
from pg_attribute
where attrelid = 'gexec_test'::regclass and attnum > 0
order by attnum
\gexec
-- \gexec should work in FETCH_COUNT mode too
-- (though the fetch limit applies to the executed queries not the meta query)
\set FETCH_COUNT 1
select 'select 1 as ones', 'select x.y, x.y*2 as double from generate_series(1,4) as x(y)'
union all
select 'drop table gexec_test', NULL
union all
select 'drop table gexec_test', 'select ''2000-01-01''::date as party_over'
\gexec
\unset FETCH_COUNT
-- show all pset options
\pset
-- test multi-line headers, wrapping, and newline indicators
prepare q as select array_to_string(array_agg(repeat('x',2*n)),E'\n') as "ab
c", array_to_string(array_agg(repeat('y',20-2*n)),E'\n') as "a
bc" from generate_series(1,10) as n(n) group by n>1 ;
\pset linestyle ascii
\pset expanded off
\pset columns 40
\pset border 0
\pset format unaligned
execute q;
\pset format aligned
execute q;
\pset format wrapped
execute q;
\pset border 1
\pset format unaligned
execute q;
\pset format aligned
execute q;
\pset format wrapped
execute q;
\pset border 2
\pset format unaligned
execute q;
\pset format aligned
execute q;
\pset format wrapped
execute q;
\pset expanded on
\pset columns 20
\pset border 0
\pset format unaligned
execute q;
\pset format aligned
execute q;
\pset format wrapped
execute q;
\pset border 1
\pset format unaligned
execute q;
\pset format aligned
execute q;
\pset format wrapped
execute q;
\pset border 2
\pset format unaligned
execute q;
\pset format aligned
execute q;
\pset format wrapped
execute q;
\pset linestyle old-ascii
\pset expanded off
\pset columns 40
\pset border 0
\pset format unaligned
execute q;
\pset format aligned
execute q;
\pset format wrapped
execute q;
\pset border 1
\pset format unaligned
execute q;
\pset format aligned
execute q;
\pset format wrapped
execute q;
\pset border 2
\pset format unaligned
execute q;
\pset format aligned
execute q;
\pset format wrapped
execute q;
\pset expanded on
\pset columns 20
\pset border 0
\pset format unaligned
execute q;
\pset format aligned
execute q;
\pset format wrapped
execute q;
\pset border 1
\pset format unaligned
execute q;
\pset format aligned
execute q;
\pset format wrapped
execute q;
\pset border 2
\pset format unaligned
execute q;
\pset format aligned
execute q;
\pset format wrapped
execute q;
deallocate q;
-- test single-line header and data
prepare q as select repeat('x',2*n) as "0123456789abcdef", repeat('y',20-2*n) as "0123456789" from generate_series(1,10) as n;
\pset linestyle ascii
\pset expanded off
\pset columns 40
\pset border 0
\pset format unaligned
execute q;
\pset format aligned
execute q;
\pset format wrapped
execute q;
\pset border 1
\pset format unaligned
execute q;
\pset format aligned
execute q;
\pset format wrapped
execute q;
\pset border 2
\pset format unaligned
execute q;
\pset format aligned
execute q;
\pset format wrapped
execute q;
\pset expanded on
\pset columns 30
\pset border 0
\pset format unaligned
execute q;
\pset format aligned
execute q;
\pset format wrapped
execute q;
\pset border 1
\pset format unaligned
execute q;
\pset format aligned
execute q;
\pset format wrapped
execute q;
\pset border 2
\pset format unaligned
execute q;
\pset format aligned
execute q;
\pset format wrapped
execute q;
\pset expanded on
\pset columns 20
\pset border 0
\pset format unaligned
execute q;
\pset format aligned
execute q;
\pset format wrapped
execute q;
\pset border 1
\pset format unaligned
execute q;
\pset format aligned
execute q;
\pset format wrapped
execute q;
\pset border 2
\pset format unaligned
execute q;
\pset format aligned
execute q;
\pset format wrapped
execute q;
\pset linestyle old-ascii
\pset expanded off
\pset columns 40
\pset border 0
\pset format unaligned
execute q;
\pset format aligned
execute q;
\pset format wrapped
execute q;
\pset border 1
\pset format unaligned
execute q;
\pset format aligned
execute q;
\pset format wrapped
execute q;
\pset border 2
\pset format unaligned
execute q;
\pset format aligned
execute q;
\pset format wrapped
execute q;
\pset expanded on
\pset border 0
\pset format unaligned
execute q;
\pset format aligned
execute q;
\pset format wrapped
execute q;
\pset border 1
\pset format unaligned
execute q;
\pset format aligned
execute q;
\pset format wrapped
execute q;
\pset border 2
\pset format unaligned
execute q;
\pset format aligned
execute q;
\pset format wrapped
execute q;
deallocate q;
\pset linestyle ascii
prepare q as select ' | = | lkjsafi\\/ /oeu rio)(!@&*#)*(!&@*) \ (&' as " | -- | 012345678 9abc def!*@#&!@(*&*~~_+-=\ \", '11' as "0123456789", 11 as int from generate_series(1,10) as n;
\pset format asciidoc
\pset expanded off
\pset border 0
execute q;
\pset border 1
execute q;
\pset border 2
execute q;
\pset expanded on
\pset border 0
execute q;
\pset border 1
execute q;
\pset border 2
execute q;
deallocate q;
\pset format aligned
\pset expanded off
\pset border 1
-- SHOW_CONTEXT
\set SHOW_CONTEXT never
do $$
begin
raise notice 'foo';
raise exception 'bar';
end $$;
\set SHOW_CONTEXT errors
do $$
begin
raise notice 'foo';
raise exception 'bar';
end $$;
\set SHOW_CONTEXT always
do $$
begin
raise notice 'foo';
raise exception 'bar';
end $$;
--
-- \crosstabview
--
CREATE TABLE ctv_data (v, h, c, i, d) AS
VALUES
('v1','h2','foo', 3, '2015-04-01'::date),
('v2','h1','bar', 3, '2015-01-02'),
('v1','h0','baz', NULL, '2015-07-12'),
('v0','h4','qux', 4, '2015-07-15'),
('v0','h4','dbl', -3, '2014-12-15'),
('v0',NULL,'qux', 5, '2014-07-15'),
('v1','h2','quux',7, '2015-04-04');
-- running \crosstabview after query uses query in buffer
SELECT v, EXTRACT(year FROM d), count(*)
FROM ctv_data
GROUP BY 1, 2
ORDER BY 1, 2;
-- basic usage with 3 columns
\crosstabview
-- ordered months in horizontal header, quoted column name
SELECT v, to_char(d, 'Mon') AS "month name", EXTRACT(month FROM d) AS num,
count(*) FROM ctv_data GROUP BY 1,2,3 ORDER BY 1
\crosstabview v "month name":num 4
-- ordered months in vertical header, ordered years in horizontal header
SELECT EXTRACT(year FROM d) AS year, to_char(d,'Mon') AS "month name",
EXTRACT(month FROM d) AS month,
format('sum=%s avg=%s', sum(i), avg(i)::numeric(2,1))
FROM ctv_data
GROUP BY EXTRACT(year FROM d), to_char(d,'Mon'), EXTRACT(month FROM d)
ORDER BY month
\crosstabview "month name" year:year format
-- combine contents vertically into the same cell (V/H duplicates)
SELECT v, h, string_agg(c, E'\n') FROM ctv_data GROUP BY v, h ORDER BY 1,2,3
\crosstabview 1 2 3
-- horizontal ASC order from window function
SELECT v,h, string_agg(c, E'\n') AS c, row_number() OVER(ORDER BY h) AS r
FROM ctv_data GROUP BY v, h ORDER BY 1,3,2
\crosstabview v h:r c
-- horizontal DESC order from window function
SELECT v, h, string_agg(c, E'\n') AS c, row_number() OVER(ORDER BY h DESC) AS r
FROM ctv_data GROUP BY v, h ORDER BY 1,3,2
\crosstabview v h:r c
-- horizontal ASC order from window function, NULLs pushed rightmost
SELECT v,h, string_agg(c, E'\n') AS c, row_number() OVER(ORDER BY h NULLS LAST) AS r
FROM ctv_data GROUP BY v, h ORDER BY 1,3,2
\crosstabview v h:r c
-- only null, no column name, 2 columns: error
SELECT null,null \crosstabview
-- only null, no column name, 3 columns: works
SELECT null,null,null \crosstabview
-- null display
\pset null '#null#'
SELECT v,h, string_agg(i::text, E'\n') AS i FROM ctv_data
GROUP BY v, h ORDER BY h,v
\crosstabview v h i
\pset null ''
-- refer to columns by position
SELECT v,h,string_agg(i::text, E'\n'), string_agg(c, E'\n')
FROM ctv_data GROUP BY v, h ORDER BY h,v
\crosstabview 2 1 4
-- refer to columns by positions and names mixed
SELECT v,h, string_agg(i::text, E'\n') AS i, string_agg(c, E'\n') AS c
FROM ctv_data GROUP BY v, h ORDER BY h,v
\crosstabview 1 "h" 4
-- error: bad column name
SELECT v,h,c,i FROM ctv_data
\crosstabview v h j
-- error: bad column number
SELECT v,h,i,c FROM ctv_data
\crosstabview 2 1 5
-- error: same H and V columns
SELECT v,h,i,c FROM ctv_data
\crosstabview 2 h 4
-- error: too many columns
SELECT a,a,1 FROM generate_series(1,3000) AS a
\crosstabview
-- error: only one column
SELECT 1 \crosstabview
DROP TABLE ctv_data;
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