For query: ```SQL CREATE VIEW v0 ( v1 ) AS SELECT CAST ( 0 AS VARCHAR(1) ); CREATE VIEW v2 ( v3 ) AS SELECT * FROM v0 UNION ALL SELECT ( v1 IN ( 10) ) from v0; SELECT * FROM v2 NATURAL JOIN v2; SELECT COUNT(*) FROM v2 NATURAL JOIN v2; ``` The expected answer should be: 00 2. However, the actual output is: 0000 2. This problem seems to be introduced by de9ed6293de53e89b7c37e7de9a8697d86d7f619