42 lines
1.4 KiB
Haskell
42 lines
1.4 KiB
Haskell
{-# LANGUAGE OverloadedStrings #-}
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{-# LANGUAGE RecordWildCards #-}
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{-# LANGUAGE GADTs #-}
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module Ringo.Generator.Internal where
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import qualified Data.Map as Map
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import qualified Data.Text as Text
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import Database.HsSqlPpp.Syntax (ScalarExpr)
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import Data.List (find)
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import Data.Monoid ((<>))
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import Data.Text (Text)
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import Ringo.Extractor.Internal
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import Ringo.Generator.Sql
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import Ringo.Types
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dimColumnMapping :: Text -> Fact -> TableName -> [(ColumnName, ColumnName)]
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dimColumnMapping dimPrefix fact dimTableName =
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[ (dimColumnName factColTargetTable factColTargetColumn, factColTargetColumn)
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| FactColumn { factColType = DimVal {..}, ..} <- factColumns fact
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, dimPrefix <> factColTargetTable == dimTableName ]
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coalesceColumn :: TypeDefaults -> TableName -> Column -> ScalarExpr
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coalesceColumn defaults tName Column{..} =
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if columnNullable == Null
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then app "coalesce" [fqColName, num $ defVal columnType]
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else fqColName
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where
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fqColName = eqi tName columnName
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defVal colType =
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maybe (error $ "Default value not known for column type: " ++ Text.unpack colType) snd
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. find (\(k, _) -> k `Text.isPrefixOf` colType)
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. Map.toList
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$ defaults
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suffixTableName :: TablePopulationMode -> Text -> TableName -> TableName
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suffixTableName popMode suffix tableName = case popMode of
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FullPopulation -> tableName <> suffix
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IncrementalPopulation -> tableName
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