SQLcl versions 26.1.0 and 26.1.2 produces the below invalid view on project deploy onto my version 19.24.0.0.0 clean environment (empty schema). Column names appear as both lowercase and uppercase, leading to ORA-00957: duplicate column name.
CREATE OR REPLACE VIEW DATABASECHANGELOG_DETAILS AS
SELECT da.deployment_id,
da.id,
da.author,
da.filename,
da.sequence,
da.dateexecuted,
da.status,
da.md5sum,
da.description,
da.comments,
d.liquibase,
da.contexts,
da.labels,
da.sql,
da.sxml,
da.EXECTYPE,
da.DESCRIPTION,
da.COMMENTS,
da.TAG,
da.CONTEXTS,
da.LABELS
FROM MYSCHEMA.DATABASECHANGELOG d
LEFT JOIN MYSCHEMA.DATABASECHANGELOG_ACTIONS da
ON d.id = da.id
AND d.author = da.author
AND d.filename = da.filename
ORDER BY 1, 7;
(Formatted for readability)