/*
 * Copyright (c) 2011-2024, baomidou (jobob@qq.com).
 *
 * Licensed 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.baomidou.mybatisplus.generator.config.querys;

/**
 * Gauss 表数据查询
 *
 * @author halower
 * @since 2019-06-27
 */
public class GaussQuery extends AbstractDbQuery {

    @Override
    public String tablesSql() {
        return "SELECT * FROM (SELECT DISTINCT T1.TABLE_NAME,T2.COMMENTS AS TABLE_COMMENT FROM USER_TAB_COLUMNS T1 " +
            "LEFT JOIN USER_TAB_COMMENTS T2 ON T1.TABLE_NAME = T2.TABLE_NAME ) a WHERE 1=1 ";
    }

    @Override
    public String tableFieldsSql() {
        return
            "SELECT T1.COLUMN_NAME,T2.COMMENTS,T1.DATA_TYPE," +
                "CASE WHEN CONSTRAINT_TYPE='P' THEN 'PRI' END AS KEY " +
                "FROM USER_TAB_COLUMNS T1 " +
                "LEFT JOIN USER_COL_COMMENTS T2 ON " +
                "(T1.TABLE_NAME = T2.TABLE_NAME AND T1.COLUMN_NAME = T2.COLUMN_NAME) " +
                "LEFT JOIN (" +
                "SELECT T4.TABLE_NAME,T4.COLUMN_NAME,T5.CONSTRAINT_TYPE FROM USER_CONS_COLUMNS T4,USER_CONSTRAINTS T5 " +
                "WHERE T4.CONSTRAINT_NAME = T5.CONSTRAINT_NAME AND T5.CONSTRAINT_TYPE = 'P'" +
                ")T3 ON (T1.TABLE_NAME = T3.TABLE_NAME AND T1.COLUMN_NAME = T3.COLUMN_NAME) " +
                "WHERE T1.TABLE_NAME = '%s' " +
                "ORDER BY T1.TABLE_NAME,T1.COLUMN_ID";
    }

    @Override
    public String tableName() {
        return "TABLE_NAME";
    }

    @Override
    public String tableComment() {
        return "TABLE_COMMENT";
    }

    @Override
    public String fieldName() {
        return "COLUMN_NAME";
    }

    @Override
    public String fieldType() {
        return "DATA_TYPE";
    }

    @Override
    public String fieldComment() {
        return "COMMENTS";
    }

    @Override
    public String fieldKey() {
        return "KEY";
    }
}
