CREATE TABLE tbl1 (a integer);
CREATE TABLE tbl2 (a integer);
CREATE TABLE tbl3 (b integer) using columnar;
SELECT *
FROM tbl1
	LEFT JOIN tbl2 ON tbl1.a = tbl2.a
	LEFT JOIN tbl3 ON tbl2.a = tbl3.b;

the server suddenly closed the connection
        Most likely, the server stopped working due to a glitch.
        before or during the execution of the request.
Connection to the server is lost. The recovery attempt failed.
Connection to the server is lost. The recovery attempt failed.
!?> \q