Safe Haskell	Safe
Language	Haskell2010

QueryParser

Description

Synopsis

Documentation

QueryExpr represents a SELECT statement

Constructors

Fields

qeSelectList :: [(ValueExpr, Maybe String)]
qeSelectList contains list of selected columns
qefromClause :: ValueExpr
qeFromClause contains table name
qeWhere :: Maybe ValueExpr
qeWhere contains where clause expression
qeGroupBy :: [ValueExpr]
qeGroupBy contains list of groupby expresions
qeHaving :: Maybe ValueExpr
qeHaving contains havingby expression
qeOrderBy :: [ValueExpr]
qeOrderBy contains list of orderby clause expressions

Instances

Eq QueryExpr Source #
Instance details Defined in QueryParser Methods (==) :: QueryExpr -> QueryExpr -> Bool # (/=) :: QueryExpr -> QueryExpr -> Bool #
Show QueryExpr Source #
Instance details Defined in QueryParser Methods showsPrec :: Int -> QueryExpr -> ShowS # show :: QueryExpr -> String # showList :: [QueryExpr] -> ShowS #

queryExpr aggregates all parsers to parse a SELECT statement

makeSelect makes a empty QueryExpr object

evaluateQuery evaluates a query expression First argument is parsed query expression Second argument is Maybe Database instance