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From jackylk <...@git.apache.org>
Subject [GitHub] incubator-carbondata pull request #653: [CARBONDATA-769] Added codegen suppo...
Date Tue, 14 Mar 2017 14:22:32 GMT
Github user jackylk commented on a diff in the pull request:

    https://github.com/apache/incubator-carbondata/pull/653#discussion_r105920583
  
    --- Diff: integration/spark2/src/main/scala/org/apache/spark/sql/CarbonDictionaryDecoder.scala
---
    @@ -200,6 +201,123 @@ case class CarbonDictionaryDecoder(
         }
       }
     
    +  override def doConsume(ctx: CodegenContext, input: Seq[ExprCode], row: ExprCode): String
= {
    +
    +    val storePath = CarbonEnv.get.carbonMetastore.storePath
    +    val absoluteTableIdentifiers = relations.map { relation =>
    +      val carbonTable = relation.carbonRelation.carbonRelation.metaData.carbonTable
    +      (carbonTable.getFactTableName, carbonTable.getAbsoluteTableIdentifier)
    +    }.toMap
    +
    +    if (isRequiredToDecode) {
    +      val cacheProvider: CacheProvider = CacheProvider.getInstance
    +      val forwardDictionaryCache: Cache[DictionaryColumnUniqueIdentifier, Dictionary]
=
    +        cacheProvider.createCache(CacheType.FORWARD_DICTIONARY, storePath)
    +      val dicts: Seq[ForwardDictionaryWrapper] = getDictionaryWrapper(absoluteTableIdentifiers,
    +        forwardDictionaryCache, storePath)
    +
    +      val exprs = child.output.map(x =>
    +        ExpressionCanonicalizer.execute(BindReferences.bindReference(x, child.output)))
    +      ctx.currentVars = input
    +      val resultVars = exprs.zipWithIndex.map { e =>
    +        if (dicts(e._2) != null) {
    +          val ev = e._1.genCode(ctx)
    +          val value = ctx.freshName("value")
    +          val valueIntern = ctx.freshName("valueIntern")
    +          val isNull = ctx.freshName("isNull")
    +          val dictsRef = ctx.addReferenceObj("dictsRef", dicts(e._2))
    +          var code =
    +            s"""
    +               |${ev.code}
    +             """.stripMargin
    +          code +=
    +            s"""
    +             |boolean $isNull = false;
    +             |byte[] $valueIntern = $dictsRef.getDictionaryValueForKeyInBytes(${ ev.value
});
    +             |if (java.util.Arrays.equals(org.apache.carbondata.core.constants
    +             |.CarbonCommonConstants.MEMBER_DEFAULT_VAL_ARRAY, $valueIntern)) {
    +             |  $isNull = true;
    +             |}
    +             """.stripMargin
    +
    +            val caseCode = getDictionaryColumnIds(e._2)._3 match {
    +              case DataType.INT =>
    +                s"""
    +                   |int $value = Integer.parseInt(new String($valueIntern,
    +                   |org.apache.carbondata.core.constants.CarbonCommonConstants
    +                   |.DEFAULT_CHARSET_CLASS));
    +                 """.stripMargin
    +              case DataType.SHORT =>
    +                s"""
    +                   |short $value =
    +                   |Short.parseShort(new String($valueIntern,
    +                   |org.apache.carbondata.core.constants.CarbonCommonConstants
    +                   |.DEFAULT_CHARSET_CLASS));
    +                 """.stripMargin
    +              case DataType.DOUBLE =>
    +                s"""
    +                   |double $value =
    +                   |Double.parseDouble(new String($valueIntern,
    +                   |org.apache.carbondata.core.constants.CarbonCommonConstants
    +                   |.DEFAULT_CHARSET_CLASS));
    +                 """.stripMargin
    +              case DataType.LONG =>
    +                s"""
    +                   |long $value =
    +                   |Long.parseLong(new String($valueIntern,
    +                   |org.apache.carbondata.core.constants.CarbonCommonConstants
    +                   |.DEFAULT_CHARSET_CLASS));
    +                 """.stripMargin
    +              case DataType.DECIMAL =>
    +                s"""
    +                   |org.apache.spark.sql.types.Decimal $value =
    +                   |Decimal.apply(new java.math.BigDecimal(
    +                   |new String($valueIntern, org.apache.carbondata.core.constants
    +                   |.CarbonCommonConstants.DEFAULT_CHARSET_CLASS)));
    +                 """.stripMargin
    +              case _ =>
    +                s"""
    +                   | UTF8String $value = UTF8String.fromBytes($valueIntern);
    +                 """.stripMargin
    +            }
    +          code +=
    +            s"""
    +               |$caseCode
    +             """.stripMargin
    --- End diff --
    
    simplify it in one line


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