/// <summary>
/// Loads all the current character set names and ids for this server
/// into the charSets hashtable
/// </summary>
private void LoadCharacterSets(MySqlConnection connection)
{
MySqlCommand cmd = new MySqlCommand("SHOW COLLATION", connection);
// now we load all the currently active collations
try
{
using (MySqlDataReader reader = cmd.ExecuteReader())
{
charSets = new Dictionary <int, string>();
while (reader.Read())
{
charSets[Convert.ToInt32(reader["id"], NumberFormatInfo.InvariantInfo)] =
reader.GetString(reader.GetOrdinal("charset"));
}
}
}
catch (Exception ex)
{
MySqlTrace.LogError(ThreadID, ex.Message);
throw;
}
}
public virtual MySqlSchemaCollection GetIndexColumns(string[] restrictions)
{
MySqlSchemaCollection dt = new MySqlSchemaCollection("IndexColumns");
dt.AddColumn("INDEX_CATALOG", typeof(string));
dt.AddColumn("INDEX_SCHEMA", typeof(string));
dt.AddColumn("INDEX_NAME", typeof(string));
dt.AddColumn("TABLE_NAME", typeof(string));
dt.AddColumn("COLUMN_NAME", typeof(string));
dt.AddColumn("ORDINAL_POSITION", typeof(int));
dt.AddColumn("SORT_ORDER", typeof(string));
int max = restrictions == null ? 4 : restrictions.Length;
string[] tableRestrictions = new string[Math.Max(max, 4)];
if (restrictions != null)
{
restrictions.CopyTo(tableRestrictions, 0);
}
tableRestrictions[3] = "BASE TABLE";
MySqlSchemaCollection tables = GetTables(tableRestrictions);
foreach (MySqlSchemaRow table in tables.Rows)
{
string sql = String.Format("SHOW INDEX FROM `{0}`.`{1}`",
table["TABLE_SCHEMA"], table["TABLE_NAME"]);
MySqlCommand cmd = new MySqlCommand(sql, connection);
using (MySqlDataReader reader = cmd.ExecuteReader())
{
while (reader.Read())
{
string key_name = GetString(reader, reader.GetOrdinal("KEY_NAME"));
string col_name = GetString(reader, reader.GetOrdinal("COLUMN_NAME"));
if (restrictions != null)
{
if (restrictions.Length >= 4 && restrictions[3] != null &&
key_name != restrictions[3])
{
continue;
}
if (restrictions.Length >= 5 && restrictions[4] != null &&
col_name != restrictions[4])
{
continue;
}
}
MySqlSchemaRow row = dt.AddRow();
row["INDEX_CATALOG"] = null;
row["INDEX_SCHEMA"] = table["TABLE_SCHEMA"];
row["INDEX_NAME"] = key_name;
row["TABLE_NAME"] = GetString(reader, reader.GetOrdinal("TABLE"));
row["COLUMN_NAME"] = col_name;
row["ORDINAL_POSITION"] = reader.GetValue(reader.GetOrdinal("SEQ_IN_INDEX"));
row["SORT_ORDER"] = reader.GetString("COLLATION");
}
}
}
return(dt);
}
