protected virtual string QuoteSingle(string name)
{
string quotedName = name.Replace(OpenQuote.ToString(), new string(OpenQuote, 2));
if (OpenQuote != CloseQuote)
{
quotedName = name.Replace(CloseQuote.ToString(), new string(CloseQuote, 2));
}
return(OpenQuote + quotedName + CloseQuote);
}
public override string Qualify(string catalog, string schema, string table)
{
StringBuilder qualifiedName = new StringBuilder();
bool quoted = false;
if (!string.IsNullOrEmpty(catalog))
{
if (catalog.StartsWith(OpenQuote.ToString()))
{
catalog = catalog.Substring(1, catalog.Length - 1);
quoted = true;
}
if (catalog.EndsWith(CloseQuote.ToString()))
{
catalog = catalog.Substring(0, catalog.Length - 1);
quoted = true;
}
qualifiedName.Append(catalog).Append(StringHelper.Underscore);
}
if (!string.IsNullOrEmpty(schema))
{
if (schema.StartsWith(OpenQuote.ToString()))
{
schema = schema.Substring(1, schema.Length - 1);
quoted = true;
}
if (schema.EndsWith(CloseQuote.ToString()))
{
schema = schema.Substring(0, schema.Length - 1);
quoted = true;
}
qualifiedName.Append(schema).Append(StringHelper.Underscore);
}
if (table.StartsWith(OpenQuote.ToString()))
{
table = table.Substring(1, table.Length - 1);
quoted = true;
}
if (table.EndsWith(CloseQuote.ToString()))
{
table = table.Substring(0, table.Length - 1);
quoted = true;
}
string name = qualifiedName.Append(table).ToString();
if (quoted)
{
return(OpenQuote + name + CloseQuote);
}
return(name);
}
/// <summary>
/// Quotes a name.
/// </summary>
/// <param name="name">The string that needs to be Quoted.</param>
/// <returns>A QuotedName </returns>
/// <remarks>
/// <p>
/// This method assumes that the name is not already Quoted. So if the name passed
/// in is <c>"name</c> then it will return <c>"""name"</c>. It escapes the first char
/// - the " with "" and encloses the escaped string with OpenQuote and CloseQuote.
/// </p>
/// </remarks>
protected virtual string Quote(string name)
{
string quotedName = name.Replace(OpenQuote.ToString(), new string(OpenQuote, 2));
// in some dbs the Open and Close Quote are the same chars - if they are
// then we don't have to escape the Close Quote char because we already
// got it.
if (OpenQuote != CloseQuote)
{
quotedName = name.Replace(CloseQuote.ToString(), new string(CloseQuote, 2));
}
return(OpenQuote + quotedName + CloseQuote);
}
public override string Qualify(string catalog, string schema, string table)
{
// SQL Server Compact doesn't support Schemas. So join schema name and table name with underscores
// similar to the SQLLite dialect.
var qualifiedName = new StringBuilder();
bool quoted = false;
if (!string.IsNullOrEmpty(catalog))
{
qualifiedName.Append(catalog).Append(StringHelper.Dot);
}
var tableName = new StringBuilder();
if (!string.IsNullOrEmpty(schema))
{
if (schema.StartsWith(OpenQuote.ToString()))
{
schema = schema.Substring(1, schema.Length - 1);
quoted = true;
}
if (schema.EndsWith(CloseQuote.ToString()))
{
schema = schema.Substring(0, schema.Length - 1);
quoted = true;
}
tableName.Append(schema).Append(StringHelper.Underscore);
}
if (table.StartsWith(OpenQuote.ToString()))
{
table = table.Substring(1, table.Length - 1);
quoted = true;
}
if (table.EndsWith(CloseQuote.ToString()))
{
table = table.Substring(0, table.Length - 1);
quoted = true;
}
string name = tableName.Append(table).ToString();
if (quoted)
{
name = OpenQuote + name + CloseQuote;
}
return(qualifiedName.Append(name).ToString());
}
/// <summary>
/// Unquotes and unescapes an already quoted name
/// </summary>
/// <param name="quoted">Quoted string</param>
/// <returns>Unquoted string</returns>
/// <remarks>
/// <p>
/// This method checks the string <c>quoted</c> to see if it is
/// quoted. If the string <c>quoted</c> is already enclosed in the OpenQuote
/// and CloseQuote then those chars are removed.
/// </p>
/// <p>
/// After the OpenQuote and CloseQuote have been cleaned from the string <c>quoted</c>
/// then any chars in the string <c>quoted</c> that have been escaped by doubling them
/// up are changed back to a single version.
/// </p>
/// <p>
/// The following quoted values return these results
/// "quoted" = quoted
/// "quote""d" = quote"d
/// quote""d = quote"d
/// </p>
/// <p>
/// If this implementation is not sufficient for your Dialect then it needs to be overridden.
/// MsSql2000Dialect is an example of where UnQuoting rules are different.
/// </p>
/// </remarks>
public virtual string UnQuote(string quoted)
{
string unquoted;
if (IsQuoted(quoted))
{
unquoted = quoted.Substring(1, quoted.Length - 2);
}
else
{
unquoted = quoted;
}
unquoted = unquoted.Replace(new string(OpenQuote, 2), OpenQuote.ToString());
if (OpenQuote != CloseQuote)
{
unquoted = unquoted.Replace(new string(CloseQuote, 2), CloseQuote.ToString());
}
return(unquoted);
}