本文整理汇总了Java中org.apache.drill.exec.planner.physical.ProjectPrel.getChildExps方法的典型用法代码示例。如果您正苦于以下问题：Java ProjectPrel.getChildExps方法的具体用法？Java ProjectPrel.getChildExps怎么用？Java ProjectPrel.getChildExps使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类org.apache.drill.exec.planner.physical.ProjectPrel的用法示例。
在下文中一共展示了ProjectPrel.getChildExps方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: visitProject
import org.apache.drill.exec.planner.physical.ProjectPrel; //导入方法依赖的package包/类
@Override
public Prel visitProject(ProjectPrel node, Object unused) throws RelConversionException {
ProjectPrel project = node;
List<RexNode> exprList = new ArrayList<>();
boolean rewrite = false;
List<RelDataTypeField> relDataTypes = new ArrayList<>();
int i = 0;
RexNode flatttenExpr = null;
for (RexNode rex : project.getChildExps()) {
RexNode newExpr = rex;
if (rex instanceof RexCall) {
RexCall function = (RexCall) rex;
String functionName = function.getOperator().getName();
if (functionName.equalsIgnoreCase("flatten") ) {
rewrite = true;
if (function.getOperands().size() != 1) {
throw new RelConversionException("Flatten expression expects a single input.");
}
newExpr = function.getOperands().get(0);
RexBuilder builder = new RexBuilder(factory);
flatttenExpr = builder.makeInputRef( new RelDataTypeDrillImpl(new RelDataTypeHolder(), factory), i);
}
}
relDataTypes.add(project.getRowType().getFieldList().get(i));
i++;
exprList.add(newExpr);
}
if (rewrite == true) {
// TODO - figure out what is the right setting for the traits
Prel newChild = ((Prel)project.getInput(0)).accept(this, null);
ProjectPrel newProject = new ProjectPrel(node.getCluster(), project.getTraitSet(), newChild, exprList, new RelRecordType(relDataTypes));
FlattenPrel flatten = new FlattenPrel(project.getCluster(), project.getTraitSet(), newProject, flatttenExpr);
return flatten;
}
Prel child = ((Prel)project.getInput()).accept(this, null);
return (Prel) project.copy(project.getTraitSet(), child, exprList, new RelRecordType(relDataTypes));
}
示例2: visitProject
import org.apache.drill.exec.planner.physical.ProjectPrel; //导入方法依赖的package包/类
@Override
public Prel visitProject(ProjectPrel node, Object unused) throws RelConversionException {
ProjectPrel project = node;
List<RexNode> exprList = new ArrayList<>();
boolean rewrite = false;
List<RelDataTypeField> relDataTypes = new ArrayList();
int i = 0;
RexNode flatttenExpr = null;
for (RexNode rex : project.getChildExps()) {
RexNode newExpr = rex;
if (rex instanceof RexCall) {
RexCall function = (RexCall) rex;
String functionName = function.getOperator().getName();
int nArgs = function.getOperands().size();
if (functionName.equalsIgnoreCase("flatten") ) {
rewrite = true;
if (function.getOperands().size() != 1) {
throw new RelConversionException("Flatten expression expects a single input.");
}
newExpr = function.getOperands().get(0);
RexBuilder builder = new RexBuilder(factory);
flatttenExpr = builder.makeInputRef( new RelDataTypeDrillImpl(new RelDataTypeHolder(), factory), i);
}
}
relDataTypes.add(project.getRowType().getFieldList().get(i));
i++;
exprList.add(newExpr);
}
if (rewrite == true) {
// TODO - figure out what is the right setting for the traits
Prel newChild = ((Prel)project.getInput(0)).accept(this, null);
ProjectPrel newProject = new ProjectPrel(node.getCluster(), project.getTraitSet(), newChild, exprList, new RelRecordType(relDataTypes));
FlattenPrel flatten = new FlattenPrel(project.getCluster(), project.getTraitSet(), newProject, flatttenExpr);
return flatten;
}
Prel child = ((Prel)project.getInput()).accept(this, null);
return (Prel) project.copy(project.getTraitSet(), child, exprList, new RelRecordType(relDataTypes));
}