Examples with RexWindow org.apache.calcite.rex.RexWindow used on opensource projects

Example 1 with RexWindow

use of org.apache.calcite.rex.RexWindow in project hive by apache.

the class ExprNodeConverter method visitOver.

@Override
public ExprNodeDesc visitOver(RexOver over) {
    if (!deep) {
        return null;
    }
    final RexWindow window = over.getWindow();
    final WindowSpec windowSpec = new WindowSpec();
    final PartitioningSpec partitioningSpec = getPSpec(window);
    windowSpec.setPartitioning(partitioningSpec);
    final WindowFrameSpec windowFrameSpec = getWindowRange(window);
    windowSpec.setWindowFrame(windowFrameSpec);
    WindowFunctionSpec wfs = new WindowFunctionSpec();
    wfs.setWindowSpec(windowSpec);
    final Schema schema = new Schema(tabAlias, inputRowType.getFieldList());
    final ASTNode wUDAFAst = new ASTConverter.RexVisitor(schema).visitOver(over);
    wfs.setExpression(wUDAFAst);
    ASTNode nameNode = (ASTNode) wUDAFAst.getChild(0);
    wfs.setName(nameNode.getText());
    for (int i = 1; i < wUDAFAst.getChildCount() - 1; i++) {
        ASTNode child = (ASTNode) wUDAFAst.getChild(i);
        wfs.addArg(child);
    }
    if (wUDAFAst.getText().equals("TOK_FUNCTIONSTAR")) {
        wfs.setStar(true);
    }
    String columnAlias = getWindowColumnAlias();
    wfs.setAlias(columnAlias);
    this.windowFunctionSpecs.add(wfs);
    return new ExprNodeColumnDesc(TypeConverter.convert(over.getType()), columnAlias, tabAlias, false);
}