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Scala example source code file (Relation.scala)
The Scala Relation.scala source code/* __ *\ ** ________ ___ / / ___ Scala API ** ** / __/ __// _ | / / / _ | (c) 2003-2011, LAMP/EPFL ** ** __\ \/ /__/ __ |/ /__/ __ | ** ** /____/\___/_/ |_/____/_/ | | ** ** |/ ** \* */ package scala.dbc package statement; /** A statement that returns a relation. */ @deprecated(DbcIsDeprecated, "2.9.0") abstract class Relation extends Statement { def isCompatibleType: (DataType,DataType)=>Boolean = ((dt,wdt)=>dt.isSubtypeOf(wdt)); def typeCheck (relation: result.Relation): Unit = { val sameType: Boolean = ( relation.metadata.length == fieldTypes.length && (relation.metadata.zip(fieldTypes).forall({case Pair(field,expectedType) => isCompatibleType(field.datatype, expectedType)})) ); if (!sameType) throw new exception.IncompatibleSchema(fieldTypes,relation.metadata.map(field=>field.datatype)); } def fieldTypes: List[DataType]; def sqlTypeString: String = if (fieldTypes.isEmpty) "UNTYPED" else fieldTypes.map(dt=>dt.sqlString).mkString("RELATION (",", ",")"); /** A SQL-99 compliant string representation of the statement. */ def sqlString: String; /** A SQL-99 compliant string representation of the relation sub- * statement. This only has a meaning inside another statement. */ def sqlInnerString: String; /** Executes the statement on the given database. */ def execute (database: scala.dbc.Database): scala.dbc.result.Relation = { database.executeStatement(this); } def execute (database:scala.dbc.Database, debug:Boolean): scala.dbc.result.Relation = { database.executeStatement(this,debug); } } Other Scala examples (source code examples)Here is a short list of links related to this Scala Relation.scala source code file: |
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