private static IParseTreeVisitor <IASTNode> CreateParseTreeVisitor(ISqlParserConfiguration configuration, SqlCommandTypeEnum type)
{
ISqlVisitorFacade visitorFacade = configuration.CreateVisitorFacade();
switch (type)
{
case SqlCommandTypeEnum.DML:
return((IParseTreeVisitor <IASTNode>)visitorFacade.CreateDMLVisitor());
case SqlCommandTypeEnum.DDL:
return((IParseTreeVisitor <IASTNode>)visitorFacade.CreateDDLVisitor());
case SqlCommandTypeEnum.TCL:
return((IParseTreeVisitor <IASTNode>)visitorFacade.CreateTCLVisitor());
case SqlCommandTypeEnum.DCL:
return((IParseTreeVisitor <IASTNode>)visitorFacade.CreateDCLVisitor());
case SqlCommandTypeEnum.DAL:
return((IParseTreeVisitor <IASTNode>)visitorFacade.CreateDALVisitor());
case SqlCommandTypeEnum.RL:
return((IParseTreeVisitor <IASTNode>)visitorFacade.CreateRLVisitor());
default:
throw new ShardingSqlParsingException($"Can not support SQL statement type: `{type}`");
}
}
private static ISqlParser CreateSqlParser(string sql, ISqlParserConfiguration configuration)
{
return(configuration.CreateSqlParser(sql));
}
