/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.alibaba.wasp.jdbc.result;
import com.alibaba.wasp.DataType;
import com.alibaba.wasp.FieldKeyWord;
import com.alibaba.wasp.meta.Field;
import java.io.IOException;
/**
* A result set column of a remote result.
*/
public class ResultColumn {
/**
* The column name or null.
*/
final String columnName;
final String family;
final DataType dataType;
/**
* The precision.
*/
final long precision;
/**
* The scale.
*/
final int scale;
/**
* True if this column is nullable.
*/
final int nullable;
/**
* Read an object from the given transfer object.
*
* @param field
* the Field from FTable
*/
ResultColumn(Field field) throws IOException {
family = field.getFamily();
dataType = field.getType();
columnName = field.getName();
precision = Long.MAX_VALUE;
scale = Integer.MAX_VALUE;
FieldKeyWord keyWord = field.getKeyWord();
switch (keyWord) {
case REQUIRED : nullable = 1; break;
default: nullable = 0;
}
}
}