Refactoring: Breaks Ringo.Generator into small modules.
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module Ringo.Generator.Create (tableDefnSQL, factTableDefnSQL) where
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import Control.Monad.Reader (Reader, asks)
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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.Internal
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import Ringo.Types
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import Ringo.Utils
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tableDefnSQL :: Table -> [Text]
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tableDefnSQL Table {..} =
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tableSQL : concatMap constraintDefnSQL tableConstraints
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where
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columnDefnSQL Column {..} =
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columnName <> " " <> columnType <> " " <> nullableDefnSQL columnNullable
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nullableDefnSQL Null = "NULL"
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nullableDefnSQL NotNull = "NOT NULL"
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tableSQL = "CREATE TABLE " <> tableName <> " (\n"
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<> (joinColumnNames . map columnDefnSQL $ tableColumns)
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<> "\n)"
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constraintDefnSQL constraint =
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let alterTableSQL = "ALTER TABLE ONLY " <> tableName <> " ADD "
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in case constraint of
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PrimaryKey cName -> [ alterTableSQL <> "PRIMARY KEY (" <> cName <> ")" ]
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ForeignKey oTableName cNamePairs ->
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[ alterTableSQL <> "FOREIGN KEY (" <> joinColumnNames (map fst cNamePairs) <> ") REFERENCES "
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<> oTableName <> " (" <> joinColumnNames (map snd cNamePairs) <> ")" ]
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UniqueKey cNames -> ["CREATE UNIQUE INDEX ON " <> tableName <> " (" <> joinColumnNames cNames <> ")"]
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factTableDefnSQL :: Fact -> Table -> Reader Env [Text]
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factTableDefnSQL fact table = do
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Settings {..} <- asks envSettings
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allDims <- extractAllDimensionTables fact
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let factCols = forMaybe (factColumns fact) $ \col -> case col of
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DimTime cName -> Just $ timeUnitColumnName settingDimTableIdColumnName cName settingTimeUnit
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NoDimId cName -> Just cName
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_ -> Nothing
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dimCols = [ factDimFKIdColumnName settingDimPrefix settingDimTableIdColumnName tableName
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| (_, Table {..}) <- allDims ]
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indexSQLs = [ "CREATE INDEX ON " <> tableName table <> " USING btree (" <> col <> ")"
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| col <- factCols ++ dimCols ]
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return $ tableDefnSQL table ++ indexSQLs
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@ -0,0 +1,38 @@
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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 Data.List (find)
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import Data.Maybe (fromMaybe)
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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.Types
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joinColumnNames :: [ColumnName] -> Text
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joinColumnNames = Text.intercalate ",\n"
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fullColumnName :: TableName -> ColumnName -> ColumnName
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fullColumnName tName cName = tName <> "." <> cName
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dimColumnMapping :: Text -> Fact -> TableName -> [(ColumnName, ColumnName)]
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dimColumnMapping dimPrefix fact dimTableName =
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[ (dimColumnName dName cName, cName)
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| DimVal dName cName <- factColumns fact , dimPrefix <> dName == dimTableName]
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coalesceColumn :: TypeDefaults -> TableName -> Column -> Text
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coalesceColumn defaults tName Column{..} =
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if columnNullable == Null
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then "coalesce(" <> fqColName <> ", " <> defVal columnType <> ")"
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else fqColName
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where
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fqColName = fullColumnName tName columnName
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defVal colType =
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fromMaybe (error $ "Default value not known for column type: " ++ Text.unpack colType)
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. fmap 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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@ -0,0 +1,50 @@
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module Ringo.Generator.Populate.Dimension (dimensionTablePopulateSQL) where
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import qualified Data.Text as Text
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#if MIN_VERSION_base(4,8,0)
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#else
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import Control.Applicative ((<$>))
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#endif
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import Control.Monad.Reader (Reader, asks)
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import Data.Maybe (fromJust)
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import Data.Monoid ((<>))
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import Data.Text (Text)
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import Ringo.Generator.Internal
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import Ringo.Types
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import Ringo.Utils
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dimensionTablePopulateSQL :: TablePopulationMode -> Fact -> TableName -> Reader Env Text
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dimensionTablePopulateSQL popMode fact dimTableName = do
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dimPrefix <- settingDimPrefix <$> asks envSettings
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tables <- asks envTables
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defaults <- asks envTypeDefaults
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let factTable = fromJust $ findTable (factTableName fact) tables
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colMapping = dimColumnMapping dimPrefix fact dimTableName
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selectCols = [ coalesceColumn defaults (factTableName fact) col <> " AS " <> cName
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| (_, cName) <- colMapping
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, let col = fromJust . findColumn cName $ tableColumns factTable ]
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baseSelectC = "SELECT DISTINCT\n" <> joinColumnNames selectCols
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<> "\nFROM " <> factTableName fact
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baseWhereC = "(\n"
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<> Text.intercalate "\nOR " [ c <> " IS NOT NULL" | (_, c) <- colMapping ]
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<> "\n)"
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insertC selectC whereCs =
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"INSERT INTO " <> dimTableName
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<> " (\n" <> joinColumnNames (map fst colMapping) <> "\n) "
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<> "SELECT x.* FROM (\n"
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<> selectC <> "\nWHERE " <> Text.intercalate " AND\n" whereCs
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<> ") x"
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timeCol = head [ cName | DimTime cName <- factColumns fact ]
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return $ case popMode of
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FullPopulation -> insertC baseSelectC [baseWhereC]
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IncrementalPopulation ->
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insertC baseSelectC [baseWhereC, timeCol <> " > ?", timeCol <> " <= ?"]
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<> "\nLEFT JOIN " <> dimTableName <> " ON\n"
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<> Text.intercalate " \nAND "
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[ fullColumnName dimTableName c1 <> " = " <> fullColumnName "x" c2
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| (c1, c2) <- colMapping ]
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<> "\nWHERE " <> Text.intercalate " \nAND "
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[ fullColumnName dimTableName c <> " IS NULL" | (c, _) <- colMapping ]
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@ -0,0 +1,197 @@
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module Ringo.Generator.Populate.Fact (factTablePopulateSQL) where
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import qualified Data.Text as Text
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#if MIN_VERSION_base(4,8,0)
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#else
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import Control.Applicative ((<$>))
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#endif
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import Control.Monad.Reader (Reader, asks)
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import Data.List (nub)
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import Data.Maybe (fromJust, fromMaybe, mapMaybe, listToMaybe)
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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.Internal
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import Ringo.Types
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import Ringo.Utils
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data FactTablePopulateSelectSQL = FactTablePopulateSelectSQL
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{ ftpsSelectCols :: ![(Text, Text)]
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, ftpsSelectTable :: !Text
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, ftpsJoinClauses :: ![Text]
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, ftpsWhereClauses :: ![Text]
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, ftpsGroupByCols :: ![Text]
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} deriving (Show, Eq)
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factTableUpdateSQL :: Fact -> Text -> FactTablePopulateSelectSQL -> Reader Env [Text]
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factTableUpdateSQL fact groupByColPrefix populateSelectSQL@FactTablePopulateSelectSQL {..} = do
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Settings {..} <- asks envSettings
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tables <- asks envTables
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let countDistinctCols = [ col | col@(FactCountDistinct _ _) <- factColumns fact]
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fTableName = factTableName fact
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fTable = fromJust . findTable fTableName $ tables
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tablePKColName = head [ cName | PrimaryKey cName <- tableConstraints fTable ]
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extFactTableName =
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extractedFactTableName settingFactPrefix settingFactInfix (factName fact) settingTimeUnit
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return $ for countDistinctCols $ \(FactCountDistinct scName cName) ->
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let unqCol = fullColumnName fTableName (fromMaybe tablePKColName scName) <> "::text"
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bucketSelectCols =
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[ ( "hashtext(" <> unqCol <> ") & "
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<> Text.pack (show $ bucketCount settingFactCountDistinctErrorRate - 1)
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, cName <> "_bnum"
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)
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, ( "31 - floor(log(2, min(hashtext(" <> unqCol <> ") & ~(1 << 31))))::int"
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, cName <> "_bhash"
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)
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]
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selectSQL = toSelectSQL $
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populateSelectSQL
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{ ftpsSelectCols = filter ((`elem` ftpsGroupByCols) . snd) ftpsSelectCols ++ bucketSelectCols
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, ftpsGroupByCols = ftpsGroupByCols ++ [ cName <> "_bnum" ]
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, ftpsWhereClauses = ftpsWhereClauses ++ [ unqCol <> " IS NOT NULL" ]
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}
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aggSelectClause =
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"json_object_agg(" <> cName <> "_bnum, " <> cName <> "_bhash) AS " <> cName
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in "UPDATE " <> extFactTableName
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<> "\nSET " <> cName <> " = " <> fullColumnName "xyz" cName
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<> "\nFROM ("
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<> "\nSELECT " <> joinColumnNames (ftpsGroupByCols ++ [aggSelectClause])
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<> "\nFROM (\n" <> selectSQL <> "\n) zyx"
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<> "\nGROUP BY \n" <> joinColumnNames ftpsGroupByCols
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<> "\n) xyz"
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<> "\n WHERE\n"
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<> Text.intercalate "\nAND "
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[ fullColumnName extFactTableName .fromJust . Text.stripPrefix groupByColPrefix $ col
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<> " = " <> fullColumnName "xyz" col
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| col <- ftpsGroupByCols ]
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where
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bucketCount :: Double -> Integer
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bucketCount errorRate =
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let power :: Double = fromIntegral (ceiling . logBase 2 $ (1.04 / errorRate) ** 2 :: Integer)
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in ceiling $ 2 ** power
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factTablePopulateSQL :: TablePopulationMode -> Fact -> Reader Env [Text]
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factTablePopulateSQL popMode fact = do
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Settings {..} <- asks envSettings
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allDims <- extractAllDimensionTables fact
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tables <- asks envTables
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defaults <- asks envTypeDefaults
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let fTableName = factTableName fact
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fTable = fromJust . findTable fTableName $ tables
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dimIdColName = settingDimTableIdColumnName
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timeUnitColumnInsertSQL cName =
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let colName = timeUnitColumnName dimIdColName cName settingTimeUnit
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in ( colName
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, "extract(epoch from " <> fullColumnName fTableName cName <> ")::bigint/"
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<> Text.pack (show $ timeUnitToSeconds settingTimeUnit)
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, True
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)
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factColMap = concatFor (factColumns fact) $ \col -> case col of
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DimTime cName -> [ timeUnitColumnInsertSQL cName ]
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NoDimId cName ->
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let sCol = fromJust . findColumn cName $ tableColumns fTable
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in [ (cName, coalesceColumn defaults fTableName sCol, True) ]
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FactCount scName cName ->
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[ (cName, "count(" <> maybe "*" (fullColumnName fTableName) scName <> ")", False) ]
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FactSum scName cName ->
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[ (cName, "sum(" <> fullColumnName fTableName scName <> ")", False) ]
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FactAverage scName cName ->
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[ ( cName <> settingAvgCountColumSuffix
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, "count(" <> fullColumnName fTableName scName <> ")"
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, False
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)
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, ( cName <> settingAvgSumColumnSuffix
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, "sum(" <> fullColumnName fTableName scName <> ")"
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, False
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)
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]
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FactCountDistinct _ cName -> [ (cName, "'{}'::json", False)]
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_ -> []
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dimColMap = for allDims $ \(dimFact, factTable@Table {tableName}) -> let
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dimFKIdColName = factDimFKIdColumnName settingDimPrefix dimIdColName tableName
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factSourceTableName = factTableName dimFact
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factSourceTable = fromJust . findTable factSourceTableName $ tables
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dimFKIdColumn = fromJust . findColumn dimFKIdColName $ tableColumns factSourceTable
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dimLookupWhereClauses =
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[ fullColumnName tableName dimColName <> " = " <> coalesceColumn defaults factSourceTableName sourceCol
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| (dimColName, sourceColName) <- dimColumnMapping settingDimPrefix dimFact tableName
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, let sourceCol = fromJust . findColumn sourceColName $ tableColumns factSourceTable ]
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insertSQL = if factTable `elem` tables -- existing dimension table
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then (if columnNullable dimFKIdColumn == Null then coalesceFKId else id)
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$ fullColumnName factSourceTableName dimFKIdColName
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else "SELECT " <> dimIdColName <> " FROM " <> tableName <> "\nWHERE "
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<> Text.intercalate "\n AND " dimLookupWhereClauses
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in (dimFKIdColName, coalesceFKId insertSQL, True)
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colMap = [ (cName, (sql, groupByColPrefix <> cName), addToGroupBy)
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| (cName, sql, addToGroupBy) <- factColMap ++ dimColMap ]
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joinClauses =
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mapMaybe (\tName -> (\p -> "LEFT JOIN " <> tName <> "\nON "<> p) <$> joinClausePreds fTable tName)
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. nub
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. map (factTableName . fst)
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$ allDims
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timeCol = fullColumnName fTableName $ head [ cName | DimTime cName <- factColumns fact ]
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extFactTableName =
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extractedFactTableName settingFactPrefix settingFactInfix (factName fact) settingTimeUnit
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populateSelectSQL =
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FactTablePopulateSelectSQL
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{ ftpsSelectCols = map snd3 colMap
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, ftpsSelectTable = fTableName
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, ftpsJoinClauses = joinClauses
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, ftpsWhereClauses = if popMode == IncrementalPopulation
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then [ timeCol <> " > ?", timeCol <> " <= ?" ]
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else []
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, ftpsGroupByCols = map ((groupByColPrefix <>) . fst3) . filter thd3 $ colMap
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}
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insertIntoSQL = "INSERT INTO " <> extFactTableName
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<> " (\n" <> Text.intercalate ",\n " (map fst3 colMap) <> "\n)\n"
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<> toSelectSQL populateSelectSQL
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updateSQLs <- factTableUpdateSQL fact groupByColPrefix populateSelectSQL
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return $ insertIntoSQL : updateSQLs
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where
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groupByColPrefix = "xxff_"
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joinClausePreds table oTableName =
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Text.intercalate " AND "
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. map (\(c1, c2) -> fullColumnName (tableName table) c1 <> " = " <> fullColumnName oTableName c2)
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<$> listToMaybe [ colPairs | ForeignKey tName colPairs <- tableConstraints table
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, tName == oTableName ]
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coalesceFKId col =
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if "coalesce" `Text.isPrefixOf` col
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then col
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else "coalesce((" <> col <> "), -1)"
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toSelectSQL :: FactTablePopulateSelectSQL -> Text
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toSelectSQL FactTablePopulateSelectSQL {..} =
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"SELECT \n" <> joinColumnNames (map (uncurry asName) ftpsSelectCols)
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<> "\nFROM " <> ftpsSelectTable
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<> (if not . null $ ftpsJoinClauses
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then "\n" <> Text.intercalate "\n" ftpsJoinClauses
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else "")
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<> (if not . null $ ftpsWhereClauses
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then "\nWHERE " <> Text.intercalate "\nAND " ftpsWhereClauses
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else "")
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<> "\nGROUP BY \n"
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<> joinColumnNames ftpsGroupByCols
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where
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asName sql alias = "(" <> sql <> ")" <> " as " <> alias
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