TAJO-1627 Rest API should support this type of query "select 1"

[charsyam]

Currently, Tajo Rest API supports well "select * from table" or "select count from table" <-- normal type but, Tajo Rest API couldn't support this type of query like "select 1" <-- direct return type to solve this, queries api should support resultset also. so I suggest this. queries return 201 Created when it is normal type of query and query is direct query type and return 200 with result like this (direct return type) {"resultCode":"OK","schema":{"fields":[{"name":"?number","typeDesc":{"dataType": {"type":"INT4"} }}],"fieldsByQualifiedName": {"?number":0} ,"fieldsByName":{"?number":[0]}},"serializedTupes":["AAAAAAE\u003d"]}

[hyunsik]

Hi @charsyam,

The proposal looks good to me. I have one suggestion. The JSON schema for Tajo schema looks different from those of other APIs. It would be great if they are consistent.