Use backticks instead of double quotes for delimited identifiers in SQL++. Change-Id: I2db58d68e8e28befa4105504c261b101fa0285af Reviewed-on: https://asterix-gerrit.ics.uci.edu/909 Reviewed-by: Jenkins <firstname.lastname@example.org> Tested-by: Jenkins <email@example.com> Reviewed-by: Till Westmann <firstname.lastname@example.org>
ASTERIXDB-1228: Add MISSING into the data model. 1. MISSING repsents the value of a non-existing field in a record or an out-of-bound index access of a collection; 2. NULL represents that the value of an optional field in a record is unknown or the value of existing collection entry is unknown. 3. Unit tests for all missing/null-in-missing/null-out scalar functions.