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simple-sql-parser/tools/Language/SQL/SimpleSQL/GroupBy.lhs

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Here are the tests for the group by component of query exprs
> {-# LANGUAGE OverloadedStrings #-}
> module Language.SQL.SimpleSQL.GroupBy (groupByTests) where
> import Language.SQL.SimpleSQL.TestTypes
> import Language.SQL.SimpleSQL.Syntax
> groupByTests :: TestItem
> groupByTests = Group "groupByTests"
> [simpleGroupBy
> ,newGroupBy
> ,randomGroupBy
> ]
> simpleGroupBy :: TestItem
> simpleGroupBy = Group "simpleGroupBy" $ map (uncurry TestQueryExpr)
> [("select a,sum(b) from t group by a"
> ,makeSelect {qeSelectList = [(Iden "a",Nothing)
> ,(App "sum" [Iden "b"],Nothing)]
> ,qeFrom = [TRSimple "t"]
> ,qeGroupBy = [SimpleGroup $ Iden "a"]
> })
> ,("select a,b,sum(c) from t group by a,b"
> ,makeSelect {qeSelectList = [(Iden "a",Nothing)
> ,(Iden "b",Nothing)
> ,(App "sum" [Iden "c"],Nothing)]
> ,qeFrom = [TRSimple "t"]
> ,qeGroupBy = [SimpleGroup $ Iden "a"
> ,SimpleGroup $ Iden "b"]
> })
> ]
test the new group by (), grouping sets, cube and rollup syntax (not
sure which sql version they were introduced, 1999 or 2003 I think).
> newGroupBy :: TestItem
> newGroupBy = Group "newGroupBy" $ map (uncurry TestQueryExpr)
> [("select * from t group by ()", ms [GroupingParens []])
> ,("select * from t group by grouping sets ((), (a))"
> ,ms [GroupingSets [GroupingParens []
> ,GroupingParens [SimpleGroup $ Iden "a"]]])
> ,("select * from t group by cube(a,b)"
> ,ms [Cube [SimpleGroup $ Iden "a", SimpleGroup $ Iden "b"]])
> ,("select * from t group by rollup(a,b)"
> ,ms [Rollup [SimpleGroup $ Iden "a", SimpleGroup $ Iden "b"]])
> ]
> where
> ms g = makeSelect {qeSelectList = [(Star,Nothing)]
> ,qeFrom = [TRSimple "t"]
> ,qeGroupBy = g}
> randomGroupBy :: TestItem
> randomGroupBy = Group "randomGroupBy" $ map ParseQueryExpr
> ["select * from t GROUP BY a"
> ,"select * from t GROUP BY GROUPING SETS((a))"
> ,"select * from t GROUP BY a,b,c"
> ,"select * from t GROUP BY GROUPING SETS((a,b,c))"
> ,"select * from t GROUP BY ROLLUP(a,b)"
> ,"select * from t GROUP BY GROUPING SETS((a,b),\n\
> \(a),\n\
> \() )"
> ,"select * from t GROUP BY ROLLUP(b,a)"
> ,"select * from t GROUP BY GROUPING SETS((b,a),\n\
> \(b),\n\
> \() )"
> ,"select * from t GROUP BY CUBE(a,b,c)"
> ,"select * from t GROUP BY GROUPING SETS((a,b,c),\n\
> \(a,b),\n\
> \(a,c),\n\
> \(b,c),\n\
> \(a),\n\
> \(b),\n\
> \(c),\n\
> \() )"
> ,"select * from t GROUP BY ROLLUP(Province, County, City)"
> ,"select * from t GROUP BY ROLLUP(Province, (County, City))"
> ,"select * from t GROUP BY ROLLUP(Province, (County, City))"
> ,"select * from t GROUP BY GROUPING SETS((Province, County, City),\n\
> \(Province),\n\
> \() )"
> ,"select * from t GROUP BY GROUPING SETS((Province, County, City),\n\
> \(Province, County),\n\
> \(Province),\n\
> \() )"
> ,"select * from t GROUP BY a, ROLLUP(b,c)"
> ,"select * from t GROUP BY GROUPING SETS((a,b,c),\n\
> \(a,b),\n\
> \(a) )"
> ,"select * from t GROUP BY a, b, ROLLUP(c,d)"
> ,"select * from t GROUP BY GROUPING SETS((a,b,c,d),\n\
> \(a,b,c),\n\
> \(a,b) )"
> ,"select * from t GROUP BY ROLLUP(a), ROLLUP(b,c)"
> ,"select * from t GROUP BY GROUPING SETS((a,b,c),\n\
> \(a,b),\n\
> \(a),\n\
> \(b,c),\n\
> \(b),\n\
> \() )"
> ,"select * from t GROUP BY ROLLUP(a), CUBE(b,c)"
> ,"select * from t GROUP BY GROUPING SETS((a,b,c),\n\
> \(a,b),\n\
> \(a,c),\n\
> \(a),\n\
> \(b,c),\n\
> \(b),\n\
> \(c),\n\
> \() )"
> ,"select * from t GROUP BY CUBE(a,b), ROLLUP(c,d)"
> ,"select * from t GROUP BY GROUPING SETS((a,b,c,d),\n\
> \(a,b,c),\n\
> \(a,b),\n\
> \(a,c,d),\n\
> \(a,c),\n\
> \(a),\n\
> \(b,c,d),\n\
> \(b,c),\n\
> \(b),\n\
> \(c,d),\n\
> \(c),\n\
> \() )"
> ,"select * from t GROUP BY a, ROLLUP(a,b)"
> ,"select * from t GROUP BY GROUPING SETS((a,b),\n\
> \(a) )"
> ,"select * from t GROUP BY Region,\n\
> \ROLLUP(Sales_Person, WEEK(Sales_Date)),\n\
> \CUBE(YEAR(Sales_Date), MONTH (Sales_Date))"
> ,"select * from t GROUP BY ROLLUP (Region, Sales_Person, WEEK(Sales_Date),\n\
> \YEAR(Sales_Date), MONTH(Sales_Date) )"
> ,"SELECT WEEK(SALES_DATE) AS WEEK,\n\
> \DAYOFWEEK(SALES_DATE) AS DAY_WEEK,\n\
> \SALES_PERSON, SUM(SALES) AS UNITS_SOLD\n\
> \FROM SALES\n\
> \WHERE WEEK(SALES_DATE) = 13\n\
> \GROUP BY WEEK(SALES_DATE), DAYOFWEEK(SALES_DATE), SALES_PERSON\n\
> \ORDER BY WEEK, DAY_WEEK, SALES_PERSON"
> ,"SELECT WEEK(SALES_DATE) AS WEEK,\n\
> \DAYOFWEEK(SALES_DATE) AS DAY_WEEK,\n\
> \SALES_PERSON, SUM(SALES) AS UNITS_SOLD\n\
> \FROM SALES\n\
> \WHERE WEEK(SALES_DATE) = 13\n\
> \GROUP BY GROUPING SETS ( (WEEK(SALES_DATE), SALES_PERSON),\n\
> \(DAYOFWEEK(SALES_DATE), SALES_PERSON))\n\
> \ORDER BY WEEK, DAY_WEEK, SALES_PERSON"
> ,"SELECT WEEK(SALES_DATE) AS WEEK,\n\
> \DAYOFWEEK(SALES_DATE) AS DAY_WEEK,\n\
> \SALES_PERSON, SUM(SALES) AS UNITS_SOLD\n\
> \FROM SALES\n\
> \WHERE WEEK(SALES_DATE) = 13\n\
> \GROUP BY ROLLUP ( WEEK(SALES_DATE), DAYOFWEEK(SALES_DATE), SALES_PERSON )\n\
> \ORDER BY WEEK, DAY_WEEK, SALES_PERSON"
> ,"SELECT WEEK(SALES_DATE) AS WEEK,\n\
> \DAYOFWEEK(SALES_DATE) AS DAY_WEEK,\n\
> \SALES_PERSON, SUM(SALES) AS UNITS_SOLD\n\
> \FROM SALES\n\
> \WHERE WEEK(SALES_DATE) = 13\n\
> \GROUP BY CUBE ( WEEK(SALES_DATE), DAYOFWEEK(SALES_DATE), SALES_PERSON )\n\
> \ORDER BY WEEK, DAY_WEEK, SALES_PERSON"
> ,"SELECT SALES_PERSON,\n\
> \MONTH(SALES_DATE) AS MONTH,\n\
> \SUM(SALES) AS UNITS_SOLD\n\
> \FROM SALES\n\
> \GROUP BY GROUPING SETS ( (SALES_PERSON, MONTH(SALES_DATE)),\n\
> \()\n\
> \)\n\
> \ORDER BY SALES_PERSON, MONTH"
> ,"SELECT WEEK(SALES_DATE) AS WEEK,\n\
> \DAYOFWEEK(SALES_DATE) AS DAY_WEEK,\n\
> \SUM(SALES) AS UNITS_SOLD\n\
> \FROM SALES\n\
> \GROUP BY ROLLUP ( WEEK(SALES_DATE), DAYOFWEEK(SALES_DATE) )\n\
> \ORDER BY WEEK, DAY_WEEK"
> ,"SELECT MONTH(SALES_DATE) AS MONTH,\n\
> \REGION,\n\
> \SUM(SALES) AS UNITS_SOLD\n\
> \FROM SALES\n\
> \GROUP BY ROLLUP ( MONTH(SALES_DATE), REGION )\n\
> \ORDER BY MONTH, REGION"
> ,"SELECT WEEK(SALES_DATE) AS WEEK,\n\
> \DAYOFWEEK(SALES_DATE) AS DAY_WEEK,\n\
> \MONTH(SALES_DATE) AS MONTH,\n\
> \REGION,\n\
> \SUM(SALES) AS UNITS_SOLD\n\
> \FROM SALES\n\
> \GROUP BY GROUPING SETS ( ROLLUP( WEEK(SALES_DATE), DAYOFWEEK(SALES_DATE) ),\n\
> \ROLLUP( MONTH(SALES_DATE), REGION ) )\n\
> \ORDER BY WEEK, DAY_WEEK, MONTH, REGION"
> ,"SELECT R1, R2,\n\
> \WEEK(SALES_DATE) AS WEEK,\n\
> \DAYOFWEEK(SALES_DATE) AS DAY_WEEK,\n\
> \MONTH(SALES_DATE) AS MONTH,\n\
> \REGION, SUM(SALES) AS UNITS_SOLD\n\
> \FROM SALES,(VALUES('GROUP 1','GROUP 2')) AS X(R1,R2)\n\
> \GROUP BY GROUPING SETS ((R1, ROLLUP(WEEK(SALES_DATE),\n\
> \DAYOFWEEK(SALES_DATE))),\n\
> \(R2,ROLLUP( MONTH(SALES_DATE), REGION ) ))\n\
> \ORDER BY WEEK, DAY_WEEK, MONTH, REGION"
> {-,"SELECT COALESCE(R1,R2) AS GROUP,\n\
> \WEEK(SALES_DATE) AS WEEK,\n\
> \DAYOFWEEK(SALES_DATE) AS DAY_WEEK,\n\
> \MONTH(SALES_DATE) AS MONTH,\n\
> \REGION, SUM(SALES) AS UNITS_SOLD\n\
> \FROM SALES,(VALUES('GROUP 1','GROUP 2')) AS X(R1,R2)\n\
> \GROUP BY GROUPING SETS ((R1, ROLLUP(WEEK(SALES_DATE),\n\
> \DAYOFWEEK(SALES_DATE))),\n\
> \(R2,ROLLUP( MONTH(SALES_DATE), REGION ) ))\n\
> \ORDER BY GROUP, WEEK, DAY_WEEK, MONTH, REGION"-}
> -- as group - needs more subtle keyword blacklisting
> ,"SELECT MONTH(SALES_DATE) AS MONTH,\n\
> \REGION,\n\
> \SUM(SALES) AS UNITS_SOLD,\n\
> \MAX(SALES) AS BEST_SALE,\n\
> \CAST(ROUND(AVG(DECIMAL(SALES)),2) AS DECIMAL(5,2)) AS AVG_UNITS_SOLD\n\
> \FROM SALES\n\
> \GROUP BY CUBE(MONTH(SALES_DATE),REGION)\n\
> \ORDER BY MONTH, REGION"
> ]