DefaultValueExprDef.java

// 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.
// This file is copied from
// https://github.com/apache/impala/blob/branch-2.9.0/fe/src/main/java/org/apache/impala/ColumnDef.java
// and modified by Doris

package org.apache.doris.analysis;

import org.apache.doris.persist.gson.GsonPostProcessable;

import com.google.gson.annotations.SerializedName;
import org.apache.log4j.LogManager;
import org.apache.log4j.Logger;

import java.io.IOException;

/**
 * This def used for column which defaultValue is an expression.
 */
public class DefaultValueExprDef implements GsonPostProcessable {
    private static final Logger LOG = LogManager.getLogger(DefaultValueExprDef.class);
    @SerializedName("exprName")
    private String exprName;
    @SerializedName("precision")
    private Long precision;


    public DefaultValueExprDef(String exprName) {
        this.exprName = exprName;
    }

    public DefaultValueExprDef(String exprName, Long precision) {
        this.exprName = exprName;
        this.precision = precision;
    }

    public String getSql() {
        StringBuilder sb = new StringBuilder();
        sb.append(exprName);
        sb.append("(");
        if (precision != null && precision != 0) {
            sb.append(precision);
        }
        sb.append(")");
        return sb.toString();
    }

    public String getExprName() {
        return exprName;
    }

    public Long getPrecision() {
        return precision;
    }

    @Override
    public void gsonPostProcess() throws IOException {
        // nothing to do
    }
}