Examples with Scope com.facebook.presto.sql.analyzer.Scope used on opensource projects

Example 6 with Scope

use of com.facebook.presto.sql.analyzer.Scope in project presto by prestodb.

the class RelationPlanner method visitTable.

@Override
protected RelationPlan visitTable(Table node, Void context) {
    Query namedQuery = analysis.getNamedQuery(node);
    Scope scope = analysis.getScope(node);
    if (namedQuery != null) {
        RelationPlan subPlan = process(namedQuery, null);
        // Add implicit coercions if view query produces types that don't match the declared output types
        // of the view (e.g., if the underlying tables referenced by the view changed)
        Type[] types = scope.getRelationType().getAllFields().stream().map(Field::getType).toArray(Type[]::new);
        RelationPlan withCoercions = addCoercions(subPlan, types);
        return new RelationPlan(withCoercions.getRoot(), scope, withCoercions.getFieldMappings());
    }
    TableHandle handle = analysis.getTableHandle(node);
    ImmutableList.Builder<Symbol> outputSymbolsBuilder = ImmutableList.builder();
    ImmutableMap.Builder<Symbol, ColumnHandle> columns = ImmutableMap.builder();
    for (Field field : scope.getRelationType().getAllFields()) {
        Symbol symbol = symbolAllocator.newSymbol(field.getName().get(), field.getType());
        outputSymbolsBuilder.add(symbol);
        columns.put(symbol, analysis.getColumn(field));
    }
    List<Symbol> outputSymbols = outputSymbolsBuilder.build();
    PlanNode root = new TableScanNode(idAllocator.getNextId(), handle, outputSymbols, columns.build(), Optional.empty(), TupleDomain.all(), null);
    return new RelationPlan(root, scope, outputSymbols);
}

Example 7 with Scope

use of com.facebook.presto.sql.analyzer.Scope in project presto by prestodb.

the class QueryPlanner method plan.

public DeleteNode plan(Delete node) {
    RelationType descriptor = analysis.getOutputDescriptor(node.getTable());
    TableHandle handle = analysis.getTableHandle(node.getTable());
    ColumnHandle rowIdHandle = metadata.getUpdateRowIdColumnHandle(session, handle);
    Type rowIdType = metadata.getColumnMetadata(session, handle, rowIdHandle).getType();
    // add table columns
    ImmutableList.Builder<Symbol> outputSymbols = ImmutableList.builder();
    ImmutableMap.Builder<Symbol, ColumnHandle> columns = ImmutableMap.builder();
    ImmutableList.Builder<Field> fields = ImmutableList.builder();
    for (Field field : descriptor.getAllFields()) {
        Symbol symbol = symbolAllocator.newSymbol(field.getName().get(), field.getType());
        outputSymbols.add(symbol);
        columns.put(symbol, analysis.getColumn(field));
        fields.add(field);
    }
    // add rowId column
    Field rowIdField = Field.newUnqualified(Optional.empty(), rowIdType);
    Symbol rowIdSymbol = symbolAllocator.newSymbol("$rowId", rowIdField.getType());
    outputSymbols.add(rowIdSymbol);
    columns.put(rowIdSymbol, rowIdHandle);
    fields.add(rowIdField);
    // create table scan
    PlanNode tableScan = new TableScanNode(idAllocator.getNextId(), handle, outputSymbols.build(), columns.build(), Optional.empty(), TupleDomain.all(), null);
    Scope scope = Scope.builder().withRelationType(new RelationType(fields.build())).build();
    RelationPlan relationPlan = new RelationPlan(tableScan, scope, outputSymbols.build());
    TranslationMap translations = new TranslationMap(relationPlan, analysis, lambdaDeclarationToSymbolMap);
    translations.setFieldMappings(relationPlan.getFieldMappings());
    PlanBuilder builder = new PlanBuilder(translations, relationPlan.getRoot(), analysis.getParameters());
    if (node.getWhere().isPresent()) {
        builder = filter(builder, node.getWhere().get(), node);
    }
    // create delete node
    Symbol rowId = builder.translate(new FieldReference(relationPlan.getDescriptor().indexOf(rowIdField)));
    List<Symbol> outputs = ImmutableList.of(symbolAllocator.newSymbol("partialrows", BIGINT), symbolAllocator.newSymbol("fragment", VARBINARY));
    return new DeleteNode(idAllocator.getNextId(), builder.getRoot(), new DeleteHandle(handle, metadata.getTableMetadata(session, handle).getTable()), rowId, outputs);
}