public void AlterColumn(string columnName, Action <AlterColumnCommand> column = null)
{
var command = new AlterColumnCommand(Name, columnName);
column?.Invoke(command);
TableCommands.Add(command);
}
public void AlterColumn(string columnName, Action <AlterColumnCommand> column = null)
{
var command = new AlterColumnCommand(Name, columnName);
if (column != null)
{
column(command);
}
TableCommands.Add(command);
}
public override void Run(StringBuilder builder, AlterColumnCommand command)
{
builder.AppendFormat("alter table {0} modify column {1} ",
_dialect.QuoteForTableName(command.TableName),
_dialect.QuoteForColumnName(command.ColumnName));
var initLength = builder.Length;
// type
if (command.DbType != DbType.Object)
{
builder.Append(_dialect.GetTypeName(command.DbType, command.Length, command.Precision, command.Scale));
}
else
{
if (command.Length > 0 || command.Precision > 0 || command.Scale > 0)
{
throw new Exception("Error while executing data migration: you need to specify the field's type in order to change its properties");
}
}
// [default value]
var builder2 = new StringBuilder();
builder2.AppendFormat("alter table {0} alter column {1} ",
_dialect.QuoteForTableName(command.TableName),
_dialect.QuoteForColumnName(command.ColumnName));
var initLength2 = builder2.Length;
if (command.Default != null)
{
builder2.Append(" set default ").Append(_dialect.GetSqlValue(command.Default)).Append(" ");
}
// result
var result = new List<string>();
if (builder.Length > initLength)
{
result.Add(builder.ToString());
}
if (builder2.Length > initLength2)
{
result.Add(builder2.ToString());
}
}
public virtual void Run(StringBuilder builder, AlterColumnCommand command)
{
builder.AppendFormat("alter table {0} alter column {1} ",
_dialect.QuoteForTableName(command.TableName),
_dialect.QuoteForColumnName(command.ColumnName));
// type
if (command.DbType != DbType.Object)
{
builder.Append(_dialect.GetTypeName(command.DbType, command.Length, command.Precision, command.Scale));
}
else
{
if (command.Length > 0 || command.Precision > 0 || command.Scale > 0)
{
throw new Exception("Error while executing data migration: you need to specify the field's type in order to change its properties");
}
}
// [default value]
if (command.Default != null)
{
builder.Append(" set default ").Append(_dialect.GetSqlValue(command.Default)).Append(Space);
}
}
