[ASTERIXDB-2399] Rename COLL_* aggregate functions into STRICT_*

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.9.3
• Fix Version/s: 0.9.5
• Component/s: *DB - AsterixDB, DOC - Documentation, FUN - Functions, SQL - Translator SQL++
• Assignee: Till Westmann
• Reporter: Till Westmann
• Created: 06/Jun/18 23:40
• Updated: 31/Oct/18 20:15
• Resolved: 12/Jun/18 01:36

Description

There are 2 kinds of aggregation functions in SQL++ right now:

1. those with the prefix ARRAY_ (which share SQL's behavior or ignoring NULL) and
2. those with the prefix COLL_ (which return NULL, if one of the values is NULL).

To reduce the confusion about which functions implement a strict NULL handling we should rename to COLL_ functions to use the prefix STRICT_ instead.