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ASF GitHub Bot commented on FLINK-3849: --------------------------------------- Github user godfreyhe commented on a diff in the pull request: https://github.com/apache/flink/pull/3520#discussion_r105811515 --- Diff: flink-libraries/flink-table/src/main/scala/org/apache/flink/table/plan/nodes/dataset/DataSetCalc.scala --- @@ -42,63 +41,40 @@ class DataSetCalc( traitSet: RelTraitSet, input: RelNode, rowRelDataType: RelDataType, - private[flink] val calcProgram: RexProgram, // for tests + calcProgram: RexProgram, ruleDescription: String) - extends SingleRel(cluster, traitSet, input) + extends Calc(cluster, traitSet, input, calcProgram) with CommonCalc with DataSetRel { - override def deriveRowType() = rowRelDataType + override def deriveRowType(): RelDataType = rowRelDataType - override def copy(traitSet: RelTraitSet, inputs: java.util.List[RelNode]): RelNode = { - new DataSetCalc( - cluster, - traitSet, - inputs.get(0), - getRowType, - calcProgram, - ruleDescription) + override def copy(traitSet: RelTraitSet, child: RelNode, program: RexProgram): Calc = { + new DataSetCalc(cluster, traitSet, child, getRowType, program, ruleDescription) } override def toString: String = calcToString(calcProgram, getExpressionString) override def explainTerms(pw: RelWriter): RelWriter = { - super.explainTerms(pw) - .item("select", selectionToString(calcProgram, getExpressionString)) - .itemIf("where", - conditionToString(calcProgram, getExpressionString), - calcProgram.getCondition != null) + pw.input("input", getInput) + .item("select", selectionToString(calcProgram, getExpressionString)) --- End diff -- two spaces for indention > Add FilterableTableSource interface and translation rule > -------------------------------------------------------- > > Key: FLINK-3849 > URL: https://issues.apache.org/jira/browse/FLINK-3849 > Project: Flink > Issue Type: New Feature > Components: Table API & SQL > Reporter: Fabian Hueske > Assignee: Kurt Young > > Add a {{FilterableTableSource}} interface for {{TableSource}} implementations > which support filter push-down. > The interface could look as follows > {code} > def trait FilterableTableSource { > // returns unsupported predicate expression > def setPredicate(predicate: Expression): Expression > } > {code} > In addition we need Calcite rules to push a predicate (or parts of it) into a > TableScan that refers to a {{FilterableTableSource}}. We might need to tweak > the cost model as well to push the optimizer in the right direction. -- This message was sent by Atlassian JIRA (v6.3.15#6346)