information_schema support for ANSI SQL Support
According to https://en.wikipedia.org/wiki/Information_schema
"In relational databases, the information schema (information_schema) is an ANSI-standard set of read-only views which provide information about all of the tables, views, columns, and procedures in a database"
It appears Vertica does not support information_schema (but v_catalog https://www.vertica.com/docs/9.2.x/HTML/Content/Authoring/SQLReferenceManual/SystemTables/CATALOG/V_CATALOGSchema.htm), while it would be great to follow the norm. i would add, it does not require a lot of job to produce an information_schema schema and then some views in it.