public SqlStatement ParseDropTableStatement()
{
DropTableStatement StatementDrop = new DropTableStatement();
Token token = lexer.Get_Token();
Error error = new Error();
if (!(token.TokenType == TokenType.Keyword && token.Lexem == "DROP"))
{
error.expected = "DROP";
error.str = "Drop value expected";
error.type = "Keyword";
result.Errors.Add(error);
}
token = lexer.Get_Token();
if (!(token.TokenType == TokenType.Keyword && token.Lexem == "TABLE"))
{
error.expected = "TABLE";
error.str = "Table value expected";
error.type = "Keyword";
result.Errors.Add(error);
}
token = lexer.Get_Token();
if (token.TokenType != TokenType.ID)
{
error.expected = "Table name";
error.str = "Table title expected";
error.type = "ID";
result.Errors.Add(error);
}
StatementDrop.TableName = token.Lexem;
token = lexer.Get_Token();
if (token.TokenType != TokenType.Semicolon)
{
error.expected = ";";
error.str = "Expected ;";
error.type = "Semicolon";
result.Errors.Add(error);
}
return(StatementDrop);
}
public override void Accept(ref ExecuteVisitor visitor)
{
DropTableStatement DropTableStatement = this;
visitor.visit(ref DropTableStatement);
}
public override void visit(ref DropTableStatement DropStatement)
{
DropStatement.write_data();
}
public abstract void visit(ref DropTableStatement DropStatement);