[大数据]flink api校验建表语句的正确性

import org.apache.flink.table.api.EnvironmentSettings;
import org.apache.flink.table.api.SqlDialect;
import org.apache.flink.table.api.TableEnvironment;
import org.apache.flink.table.api.internal.TableEnvironmentImpl;
import org.apache.flink.table.delegation.Parser;
import org.apache.flink.table.operations.Operation;
import org.apache.flink.table.operations.ddl.CreateCatalogOperation;
import org.apache.flink.table.operations.ddl.CreateDatabaseOperation;
public class DDLParser {

    static EnvironmentSettings settings;
    static TableEnvironment tableEnvironment;
    static TableEnvironmentImpl tableEnvironmentImpl;

    static {
        settings = EnvironmentSettings.newInstance()
                .useBlinkPlanner()
                .build();
        tableEnvironment = TableEnvironment.create(settings);
        tableEnvironmentImpl = ((TableEnvironmentImpl) tableEnvironment);
    }

    public static Operation parse(String ddl,SqlDialect dialect){
        tableEnvironmentImpl.getConfig().setSqlDialect(dialect);
        Parser parser = tableEnvironmentImpl.getParser();
        return parser.parse(ddl).get(0);//如果ddl没问题，这里不会抛出异常
    }

    public static Operation parseHive(String ddl){
        return parse(ddl, SqlDialect.HIVE);
    }

    public static Operation parseDefault(String ddl){
        return parse(ddl, SqlDialect.DEFAULT);
    }
}

判断Operation是哪个类型可以用instance of 来判断：

if(operation instanceof CreateDatabaseOperation){
}

if (operation instanceof CreateCatalogOperation){
}

if (operation instanceof CreateTableOperation){
}

//其他。。。。。。。。。。