# name: test/sql/update/test_update_from.test
# description: Test updates that use a from clause
# group: [update]

# create a table
statement ok
CREATE TABLE test (a INTEGER);

statement ok
INSERT INTO test VALUES (3)

statement ok
CREATE  TABLE src (a INTEGER);

statement ok
INSERT INTO src VALUES (2)

query I
SELECT * FROM test
----
3

query I
SELECT * FROM src
----
2

# test simple update
statement ok
UPDATE test SET a=test.a+s.a FROM src s

query I
SELECT * FROM test
----
5

# test self join via alias
statement ok
UPDATE test SET a=test.a+t.a FROM test t

query I
SELECT * FROM test
----
10

# test multiple tables
statement ok
UPDATE test SET a=t.a+s.a FROM test t, src s

query I
SELECT * FROM test
----
12

# test subquery
statement ok
UPDATE test SET a=s.q FROM (SELECT a+1 as q FROM src) s

query I
SELECT * FROM test
----
3

# test view
statement ok
CREATE VIEW vt AS (SELECT 17 as v)

statement ok
UPDATE test SET a=v FROM vt

query I
SELECT * FROM test
----
17

# with a where clause on the from table
statement ok
UPDATE test SET a=s.a FROM src s WHERE s.a = 2

query I
SELECT * FROM test
----
2

# with a where clause that involves both tables
statement ok
UPDATE test t SET a=1 FROM src s WHERE s.a = t.a

query I
SELECT * FROM test
----
1

# with a where clause that evaluates to false
statement ok
UPDATE test t SET a=9 FROM src s WHERE s.a=t.a

query I
SELECT * FROM test
----
1

# test with multiple updates per row (which is undefined),
# but in this case the last value in the table will win
# FIXME:
mode skip

statement ok
INSERT INTO src VALUES (7)

statement ok
UPDATE test SET a=s.a FROM src s

query I
SELECT * FROM test
----
7

mode unskip

# test described in issue 1035

statement ok
CREATE TABLE terms(docid INTEGER, term INTEGER);

statement ok
CREATE TABLE docs(id INTEGER, len INTEGER);

statement ok
insert into docs values (1, 0), (2, 0);

statement ok
insert into terms values (1, 1);

statement ok
insert into terms values (2, 1);

statement ok
insert into terms values (2, 2);

statement ok
insert into terms values (2, 3);

statement ok
UPDATE docs
SET len = sq.len
FROM (
    SELECT docid AS id, count(term) AS len
    FROM terms
    GROUP BY docid
    ORDER BY docid
) AS sq
WHERE docs.id = sq.id;

query II
select * from docs;
----
1	1
2	3