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3 Commits
Author SHA1 Message Date
Aditya Manthramurthy e463386921 Add JSON Path expression evaluation support (#7315) 
- Includes support for FROM clause JSON path
 2019-03-09 08:13:37 -08:00
Aditya Manthramurthy f04f8bbc78 Add support for Timestamp data type in SQL Select (#7185) 
This change adds support for casting strings to Timestamp via CAST:
`CAST('2010T' AS TIMESTAMP)`

It also implements the following date-time functions:
  - UTCNOW()
  - DATE_ADD()
  - DATE_DIFF()
  - EXTRACT()

For values passed to these functions, date-types are automatically
inferred.
 2019-02-04 20:54:45 -08:00
Aditya Manthramurthy 2786055df4 Add new SQL parser to support S3 Select syntax (#7102) 
- New parser written from scratch, allows easier and complete parsing
  of the full S3 Select SQL syntax. Parser definition is directly
  provided by the AST defined for the SQL grammar.

- Bring support to parse and interpret SQL involving JSON path
  expressions; evaluation of JSON path expressions will be
  subsequently added.

- Bring automatic type inference and conversion for untyped
  values (e.g. CSV data).
 2019-01-28 17:59:48 -08:00