.NET / Oracle: How to execute a script with DDL statements programmatically

Question

I want to do some programmatical schema manipulation against an oracle database in C#. Therefore, I struggle with some basic issues.

The ddl sql statements are locat

Answer 1

Simply wrap it inside BEGIN and END and it will work smoothly

var content =string.Format("BEGIN {0} END;", File.ReadAllText("script.sql"));
using (var oracleConnection = new OracleConnection(_connectionString))            
{
  oracleConnection.Open();
  using (var command = new OracleCommand(content) { Connection = oracleConnection })
  {
       command.CommandType = CommandType.Text;
       command.ExecuteNonQuery();
  }
}

Answer 2

Thanks for the semicolon tip!

My final code to run oracle scripts!

1) It accepts: - empty lines / comment ( -- ) lines - Multiline DDl / DML commands ending with ;

2) In case of error it throws an exception with the line number and sql command!

    public async Task ExecuteScript(string _connectionString, string script)
    {
        using (StringReader sr = new StringReader(script))
        {
            var connection = new OracleConnection(_connectionString);
            connection.Open();

            string sqlCommand = "";
            string sqlLine; byte lineNum = 0;

            while ((sqlLine = sr.ReadLine()) != null)
            {
                sqlLine = sqlLine.Trim(); ++lineNum;

                if (sqlLine.Length > 0 && !sqlLine.StartsWith("--"))
                {
                     sqlCommand += (sqlCommand.Length > 0 ? Environment.NewLine : "") + sqlLine;  // Accept multiline SQL

                    if (sqlCommand.EndsWith(";"))
                    {
                        sqlCommand = sqlCommand.Substring(0, sqlCommand.Length - 1);

                        var command = new OracleCommand(sqlCommand, connection);

                        try
                        {
                            await command.ExecuteNonQueryAsync(); 
                        }
                        catch (OracleException ex)
                        {
                            connection.Close();
                            var e2 = new Exception($"{lineNum} - {sqlCommand} <br/> {ex.Message}");
                            throw e2;
                        }
                    }
                }
            }

            connection.Close();

            return;
        }
    }

Answer 3

As @Steve said, the semicolons are causing your error. And you can't wrap the entire file into a single execute immediate command, since that can only execute one statement at a time. You will need to parse your file and execute each command on its own, removing the semicolon that delinates commands. Your parsing will have to deal with string literals, as you noted, which in addition to containing semicolons may also contain doubled single quotes ('') within the single quotes (') that begin and end the string literal.