@Override
protected RelationPlan visitTable(Table node, Void context) {
Query namedQuery = analysis.getNamedQuery(node);
if (namedQuery != null) {
RelationPlan subPlan = process(namedQuery, null);
return new RelationPlan(
subPlan.getRoot(),
analysis.getOutputDescriptor(node),
subPlan.getOutputSymbols(),
subPlan.getSampleWeight());
}
TupleDescriptor descriptor = analysis.getOutputDescriptor(node);
TableHandle handle = analysis.getTableHandle(node);
ImmutableList.Builder<Symbol> outputSymbolsBuilder = ImmutableList.builder();
ImmutableMap.Builder<Symbol, ColumnHandle> columns = ImmutableMap.builder();
for (Field field : descriptor.getAllFields()) {
Symbol symbol = symbolAllocator.newSymbol(field.getName().get(), field.getType());
outputSymbolsBuilder.add(symbol);
columns.put(symbol, analysis.getColumn(field));
}
List<Symbol> planOutputSymbols = outputSymbolsBuilder.build();
Optional<ColumnHandle> sampleWeightColumn =
metadata.getSampleWeightColumnHandle(session, handle);
Symbol sampleWeightSymbol = null;
if (sampleWeightColumn.isPresent()) {
sampleWeightSymbol = symbolAllocator.newSymbol("$sampleWeight", BIGINT);
outputSymbolsBuilder.add(sampleWeightSymbol);
columns.put(sampleWeightSymbol, sampleWeightColumn.get());
}
List<Symbol> nodeOutputSymbols = outputSymbolsBuilder.build();
PlanNode root =
new TableScanNode(
idAllocator.getNextId(),
handle,
nodeOutputSymbols,
columns.build(),
Optional.empty(),
TupleDomain.all(),
null);
return new RelationPlan(
root, descriptor, planOutputSymbols, Optional.ofNullable(sampleWeightSymbol));
}
