Hi,

in H2 1.1.110 (2009-04-03) - given this setup:

create table "M_1" ( "d1" int, "d2" int, VALUE DOUBLE);
create table "M_2" ( "d1" int, "d2" int, VALUE DOUBLE);
create table "D" ( "id" int);


the following select statement fails (with a "Column D1.ID not
found"):

SELECT "m1"."VALUE" + "m2"."VALUE" "VALUE",
 "D1"."id" "d1", "D2"."id" "d2"
FROM "D" "D1", "D" "D2"
LEFT OUTER JOIN "M_1" "m1" ON "m1"."d1"="D1"."id" AND
"m1"."d2"="D2"."id"
LEFT OUTER JOIN "M_2" "m2" ON "m2"."d1"="D1"."id" AND
"m2"."d2"="D2"."id"


This statement gives an "Ambiguous column name d1"

SELECT "m1"."VALUE" + "m2"."VALUE" "VALUE",
 "D1"."id" "d1", "D2"."id" "d2"
FROM "D" "D1", "D" "D2"
LEFT OUTER JOIN "M_1" "m1" ON "m1"."d1"="d1" AND "m1"."d2"="d2"
LEFT OUTER JOIN "M_2" "m2" ON "m2"."d1"="d1" AND "m2"."d2"="d2"


Actually the first statement runs on HSQLDB, the second not.


So how is the statement to be written to succeed?


Kind regards,
Thilo

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