CREATE TABLE T1( REAL,  JSON, c3     );
CREATE TABLE T2(c1 );
CREATE TABLE T3(c1 , c2 );
INSERT INTO T1     VALUES (933, '{"k": 4}', 131);
INSERT INTO T3    VALUES (564, 406);
SELECT  c.   c1  FROM T1   LEFT JOIN T2  b ON  c3 = b.c1 LEFT JOIN T3  c ON b.c1    WHERE c.c1   