enable EXTRACT EPOCH/QUARTER from timestamp ------------------------------------------- Key: TEIID-5896 URL: https://issues.redhat.com/browse/TEIID-5896 Project: Teiid Issue Type: Enhancement Components: Grammar Affects Versions: 12.3.1 Reporter: Ken Geis Assignee: Steven Hawkins Priority: Major Fix For: 13.1 Original Estimate: 5 hours Remaining Estimate: 5 hours I am connecting to Teiid from Tableau using the JDBC driver and PostgreSQL dialect. I try to drill into a timestamp field, and I get some complaints parsing the SQL. In particular, it has trouble with: {code:java} EXTRACT(QUARTER FROM the_time) EXTRACT(EPOCH FROM the_time) {code} The docs suggest these datetime components are not supported by Teiid. They are not standard, but supporting them would get me a step closer to running Tableau against Teiid (a killer app!) I was able to work around the QUARTER by dismissing the error, drilling down to month, dismissing the error again, then dragging the quarter out of my drill-down. I worked around the EPOCH by moving a date difference from being calculated in Tableau to calculating it in Teiid with TIMESTAMPDIFF. An alternate I tried was using Tableau's SQL92 dialect, but it issues a "SELECT TOP" clause that is not SQL92 standard and also not supported by Teiid.