use of org.apache.hadoop.hive.ql.optimizer.calcite.translator.ASTConverter.Schema 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);
}
use of org.apache.hadoop.hive.ql.optimizer.calcite.translator.ASTConverter.Schema in project hive by apache.
the class ExprNodeConverter method getPSpec.
private PartitioningSpec getPSpec(RexWindow window) {
PartitioningSpec partitioning = new PartitioningSpec();
Schema schema = new Schema(tabAlias, inputRowType.getFieldList());
if (window.partitionKeys != null && !window.partitionKeys.isEmpty()) {
PartitionSpec pSpec = new PartitionSpec();
for (RexNode pk : window.partitionKeys) {
PartitionExpression exprSpec = new PartitionExpression();
ASTNode astNode = pk.accept(new RexVisitor(schema));
exprSpec.setExpression(astNode);
pSpec.addExpression(exprSpec);
}
partitioning.setPartSpec(pSpec);
}
if (window.orderKeys != null && !window.orderKeys.isEmpty()) {
OrderSpec oSpec = new OrderSpec();
for (RexFieldCollation ok : window.orderKeys) {
OrderExpression exprSpec = new OrderExpression();
Order order = ok.getDirection() == RelFieldCollation.Direction.ASCENDING ? Order.ASC : Order.DESC;
NullOrder nullOrder;
if (ok.right.contains(SqlKind.NULLS_FIRST)) {
nullOrder = NullOrder.NULLS_FIRST;
} else if (ok.right.contains(SqlKind.NULLS_LAST)) {
nullOrder = NullOrder.NULLS_LAST;
} else {
// Default
nullOrder = ok.getDirection() == RelFieldCollation.Direction.ASCENDING ? NullOrder.NULLS_FIRST : NullOrder.NULLS_LAST;
}
exprSpec.setOrder(order);
exprSpec.setNullOrder(nullOrder);
ASTNode astNode = ok.left.accept(new RexVisitor(schema));
exprSpec.setExpression(astNode);
oSpec.addExpression(exprSpec);
}
partitioning.setOrderSpec(oSpec);
}
return partitioning;
}
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