58 lines
2.5 KiB
Haskell
58 lines
2.5 KiB
Haskell
module Ringo.Extractor
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( extractDimensionTables
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, extractAllDimensionTables
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, extractFactTable
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) where
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import Control.Monad.Reader (Reader, asks)
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import Data.Maybe (fromJust)
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import Data.Monoid ((<>))
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import Ringo.Extractor.Internal
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import Ringo.Types
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import Ringo.Utils
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extractFactTable :: Fact -> Reader Env Table
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extractFactTable fact = do
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Settings {..} <- asks envSettings
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allDims <- extractAllDimensionTables fact
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table <- asks $ fromJust . findTable (factTableName fact) . envTables
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let countColType = settingFactCountColumnType
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dimIdColName = settingDimTableIdColumnName
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sourceColumnType colName = columnType . fromJust . findColumn colName . tableColumns $ table
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columns = concatFor (factColumns fact) $ \col -> case col of
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DimTime cName ->
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[ Column (timeUnitColumnName dimIdColName cName settingTimeUnit) "integer" NotNull ]
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NoDimId cName -> [ fromJust . findColumn cName . tableColumns $ table]
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FactCount cName -> [ Column cName countColType NotNull ]
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FactSum scName cName -> [ Column cName (sourceColumnType scName) NotNull ]
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FactAverage scName cName ->
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[ Column (cName <> settingAvgCountColumSuffix) countColType NotNull
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, Column (cName <> settingAvgSumColumnSuffix) (sourceColumnType scName) NotNull
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]
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FactCountDistinct cName ->
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[ Column (cName <> settingCountDistinctColumSuffix) (countColType <> "[]") NotNull ]
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_ -> []
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fks = for allDims $ \(_, Table {..}) ->
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let colName = factDimFKIdColumnName settingDimPrefix dimIdColName tableName
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colType = idColTypeToFKIdColType settingDimTableIdColumnType
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colNullable = if any ((== Null) . columnNullable) tableColumns then Null else NotNull
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in ( Column colName colType colNullable , ForeignKey tableName [(colName, dimIdColName)] )
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ukColNames =
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(++ map (columnName . fst) fks)
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. forMaybe (factColumns fact) $ \col -> case col of
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DimTime cName -> Just (timeUnitColumnName dimIdColName cName settingTimeUnit)
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NoDimId cName -> Just cName
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_ -> Nothing
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return Table
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{ tableName =
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extractedFactTableName settingFactPrefix settingFactInfix (factName fact) settingTimeUnit
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, tableColumns = columns ++ map fst fks
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, tableConstraints = UniqueKey ukColNames : map snd fks
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}
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