mybatis-flex/mybatis-flex-codegen/src/main/java/com/mybatisflex/codegen/dialect/IDialect.java

/**
 * Copyright (c) 2022-2023, Mybatis-Flex (fuhai999@gmail.com).
 * <p>
 * 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
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * 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.mybatisflex.codegen.dialect;

import com.mybatisflex.codegen.config.GlobalConfig;
import com.mybatisflex.codegen.entity.Table;

import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.ResultSet;
import java.sql.SQLException;

public interface IDialect {

    IDialect DEFAULT = new JdbcDialect() {
        @Override
        String forBuildColumnsSql(String tableName) {
            return "SELECT * FROM " + tableName + " WHERE 1 = 2";
        }

        @Override
        public ResultSet getTablesResultSet(DatabaseMetaData dbMeta, Connection conn, String[] types) throws SQLException {
            return dbMeta.getTables(conn.getCatalog(), null, null, types);
        }
    };


    IDialect ORACLE = new JdbcDialect() {
        @Override
        public String forBuildColumnsSql(String tableName) {
            return "SELECT * FROM \"" + tableName + "\" WHERE rownum < 1";
        }

        @Override
        public ResultSet getTablesResultSet(DatabaseMetaData dbMeta, Connection conn, String[] types) throws SQLException {
            return dbMeta.getTables(conn.getCatalog(), dbMeta.getUserName(), null, types);
        }
    };

    IDialect SQLITE = new SqliteDialect();


    void buildTableColumns(Table table, GlobalConfig globalConfig, DatabaseMetaData dbMeta, Connection conn) throws SQLException;

    ResultSet getTablesResultSet(DatabaseMetaData dbMeta, Connection conn, String[] types) throws SQLException;
}