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7 commits

Author SHA1 Message Date
Andy Grove
b379480b7a
Merge pull request #79 from benesch/license 
Standardize license headers
 2019-06-10 19:39:12 -06:00
Nikhil Benesch
b841dccc2c
Properly handle mixed implicit and explicit joins 
Parse a query like

    SELECT * FROM a NATURAL JOIN b, c NATURAL JOIN d

as the SQL specification requires, i.e.:

    from: [
        TableReference {
            relation: TableFactor::Table("a"),
            joins: [Join {
                relation: TableFactor::Table("b"),
                join_operator: JoinOperator::Natural,
            }]
        },
        TableReference {
            relation: TableFactor::Table("c"),
            joins: [Join {
                relation: TableFactor::Table("d"),
                join_operator: JoinOperator::Natural,
            }]
        }
    ]

Previously we were parsing such queries as

    relation: TableFactor::Table("a"),
    joins: [
        Join {
            relation: TableFactor::Table("b"),
            join_operator: JoinOperator::Natural,
        },
        Join {
            relation: TableFactor::Table("c"),
            join_operator: JoinOperator::Implicit,
        },
        Join {
            relation: TableFactor::Table("d"),
            join_operator: JoinOperator::Natural,
        },
    ]

which did not make the join hierarchy clear.
 2019-06-10 11:11:25 -04:00
Nikhil Benesch
e78cf0483e
Standardize license headers 
Standardize the license header, removing the Grove Enterprise copyright
notice where it exists per #58. Also add a CI check to ensure that files
without license headers don't get merged.

Fix #58.
 2019-06-04 10:54:12 -04:00
Nickolay Ponomarev
93c9000102 [mssql] Support single-quoted column aliases 2019-06-02 13:48:14 +03:00
Nickolay Ponomarev
d0a782d8cc [mssql] Support delimited identifiers in [square brackets] 
T-SQL supports non-standard `[...]` quoting in addition to the widely
supported and standard `"..."`:

https://docs.microsoft.com/en-us/sql/relational-databases/databases/database-identifiers?view=sql-server-2017
 2019-06-02 13:48:14 +03:00
Nickolay Ponomarev
67cc880fd1 Add comments to the test files 2019-05-04 02:43:00 +03:00
Nickolay Ponomarev
304710d59a Add MSSQL dialect and fix up the postgres' identifier rules 
The `@@version` test is MS' dialect of SQL, it seems, so test it with
its own dialect.

Update the rules for identifiers in Postresql dialect per documentation,
while we're at it. The current identifier rules in Postgresql dialect
were introduced in this commit - as a copy of generic rules, it seems:
810cd8e6cf (diff-2808df0fba0aed85f9d35c167bd6a5f1L138)
 2019-05-04 01:00:13 +03:00