With MongoDB, null is returned from timestamp functions if the same function is part of WHERE clause ---------------------------------------------------------------------------------------------------- Key: TEIID-5297 URL: https://issues.jboss.org/browse/TEIID-5297 Project: Teiid Issue Type: Bug Components: Misc. Connectors Affects Versions: 8.12.11.6_4 Reporter: Jan Martiska Assignee: Steven Hawkins For example: {noformat} SELECT timestampvalue, second(timestampvalue) as sec FROM bqt1.hugeA WHERE second(timestampvalue) >= 0 {noformat} This will correctly select rows where {{second(timestampvalue) >= 0}}, but the {{sec}} column in the result will contain only nulls. If I remove the WHERE clause: {noformat} SELECT timestampvalue, second(timestampvalue) as sec FROM bqt1.hugeA; {noformat} Then the {{sec}} column will be computed correctly.