starlitcanopy/simple-sql-parser
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This commit is contained in:
Jake Wheat 2014-09-13 10:45:45 +03:00
parent ba331af24b
commit 3bf4fdbe52
3 changed files with 44 additions and 38 deletions
Language/SQL/SimpleSQL
Parser.lhs

13
Language/SQL/SimpleSQL/Parser.lhs
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@ -1200,6 +1200,10 @@ tref
tref
[on expr | using (...)]
TODO: either use explicit 'operator precedence' parsers or build
expression parser for the 'tref operators' such as joins, lateral,
aliases.
> from :: Parser [TableRef]
> from = keyword_ "from" *> commaSep1 tref
> where
@ -2003,3 +2007,12 @@ different parsers can be used for different dialects
> guardDialect ds = do
> d <- getState
> guard (d `elem` ds)
TODO: the ParseState and the Dialect argument should be turned into a
flags struct. Part (or all?) of this struct is the dialect
information, but each dialect has different versions + a big set of
flags to control syntax variations within a version of a product
dialect (for instance, string and identifier parsing rules vary from
dialect to dialect and version to version, and most or all SQL DBMSs
appear to have a set of flags to further enable or disable variations
for quoting and escaping strings and identifiers).