Julian Hyde created CALCITE-759:
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Summary: Add DayOfWeek and other missing date/time functions
Key: CALCITE-759
URL: https://issues.apache.org/jira/browse/CALCITE-759
Project: Calcite
Issue Type: Bug
Reporter: Julian Hyde
Assignee: Julian Hyde
Calcite implements EXTRACT, FLOOR, CEIL, CAST, +, - on date/time values and
much can be accomplished with these. But there are other useful functions in
other databases.
For example MySQL has DayOfWeek. See
https://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html. It is
tricky to achieve the same in Calcite (you'd need to subtract the epoch and
take the interval modulo 7).
We need to review the date/time functions in MySQL, Postgres and Oracle, and
add functions to ensure that you can accomplish the same things in Calcite
fairly easily.
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