MSSQL doesn't support TRUE/FALSE keywords in its Join predicate

CREATE TABLE t1 (c11 int, c12 int);
INSERT INTO t1 VALUES (1,10), (2,20), (3,30);
CREATE TABLE t2 (c21 int, c22 int);
SELECT * FROM t1 LEFT OUTER JOIN t2 ON TRUE;

Msg 4145, Level 15, State 1, Server a08c6f7cfc77, Line 9
An expression of non-boolean type specified in a context where a condition is expected, near ';'.

TRUE/FALSE are not supported in MSSQL (but it is supported in most DBs). 

The MSSQL way would be to write the query as :

SELECT * FROM t1 LEFT OUTER JOIN t2 ON 1=1;

MSSQL dialect should support this syntax.