Examples with QueryableTable org.apache.calcite.schema.QueryableTable used on opensource projects

Example 6 with QueryableTable

use of org.apache.calcite.schema.QueryableTable in project calcite by apache.

the class RelOptTableImpl method toRel.

public RelNode toRel(ToRelContext context) {
    // RelOptTable by replacing with immutable RelRecordType using the same field list.
    if (this.getRowType().isDynamicStruct()) {
        final RelDataType staticRowType = new RelRecordType(getRowType().getFieldList());
        final RelOptTable relOptTable = this.copy(staticRowType);
        return relOptTable.toRel(context);
    }
    // If there are any virtual columns, create a copy of this table without
    // those virtual columns.
    final List<ColumnStrategy> strategies = getColumnStrategies();
    if (strategies.contains(ColumnStrategy.VIRTUAL)) {
        final RelDataTypeFactory.Builder b = context.getCluster().getTypeFactory().builder();
        for (RelDataTypeField field : rowType.getFieldList()) {
            if (strategies.get(field.getIndex()) != ColumnStrategy.VIRTUAL) {
                b.add(field.getName(), field.getType());
            }
        }
        final RelOptTable relOptTable = new RelOptTableImpl(this.schema, b.build(), this.names, this.table, this.expressionFunction, this.rowCount) {

            @Override
            public <T> T unwrap(Class<T> clazz) {
                if (clazz.isAssignableFrom(InitializerExpressionFactory.class)) {
                    return clazz.cast(NullInitializerExpressionFactory.INSTANCE);
                }
                return super.unwrap(clazz);
            }
        };
        return relOptTable.toRel(context);
    }
    if (table instanceof TranslatableTable) {
        return ((TranslatableTable) table).toRel(context, this);
    }
    final RelOptCluster cluster = context.getCluster();
    if (Hook.ENABLE_BINDABLE.get(false)) {
        return LogicalTableScan.create(cluster, this);
    }
    if (CalcitePrepareImpl.ENABLE_ENUMERABLE && table instanceof QueryableTable) {
        return EnumerableTableScan.create(cluster, this);
    }
    if (table instanceof ScannableTable || table instanceof FilterableTable || table instanceof ProjectableFilterableTable) {
        return LogicalTableScan.create(cluster, this);
    }
    if (CalcitePrepareImpl.ENABLE_ENUMERABLE) {
        return EnumerableTableScan.create(cluster, this);
    }
    throw new AssertionError();
}