internal string GetCacheKey(string spName, ProcedureCacheEntry proc)
{
string retValue = String.Empty;
StringBuilder key = new StringBuilder(spName);
key.Append("(");
string delimiter = "";
if (proc.parameters != null)
{
foreach (MySqlSchemaRow row in proc.parameters.Rows)
{
if (row["ORDINAL_POSITION"].Equals(0))
{
retValue = "?=";
}
else
{
key.AppendFormat(CultureInfo.InvariantCulture, "{0}?", delimiter);
delimiter = ",";
}
}
}
key.Append(")");
return(retValue + key.ToString());
}
public ProcedureCacheEntry GetProcedure(MySqlConnection conn, string spName, string cacheKey)
{
ProcedureCacheEntry proc = null;
if (cacheKey != null)
{
int hash = cacheKey.GetHashCode();
lock (procHash)
{
procHash.TryGetValue(hash, out proc);
}
}
if (proc == null)
{
proc = AddNew(conn, spName);
conn.PerfMonitor.AddHardProcedureQuery();
if (conn.Settings.Logging)
{
MySqlTrace.LogInformation(conn.ServerThread,
String.Format(Resources.HardProcQuery, spName));
}
}
else
{
conn.PerfMonitor.AddSoftProcedureQuery();
if (conn.Settings.Logging)
{
MySqlTrace.LogInformation(conn.ServerThread,
String.Format(Resources.SoftProcQuery, spName));
}
}
return(proc);
}
private ProcedureCacheEntry GetParameters(string procName)
{
string procCacheKey = GetCacheKey(procName);
ProcedureCacheEntry entry = Connection.ProcedureCache.GetProcedure(Connection, procName, procCacheKey);
return(entry);
}
/// <summary>
/// Retrieves parameter information from the stored procedure specified
/// in the MySqlCommand and populates the Parameters collection of the
/// specified MySqlCommand object.
/// This method is not currently supported since stored procedures are
/// not available in MySql.
/// </summary>
/// <param name="command">The MySqlCommand referencing the stored
/// procedure from which the parameter information is to be derived.
/// The derived parameters are added to the Parameters collection of the
/// MySqlCommand.</param>
/// <exception cref="InvalidOperationException">The command text is not
/// a valid stored procedure name.</exception>
public static void DeriveParameters(MySqlCommand command)
{
if (command.CommandType != CommandType.StoredProcedure)
{
throw new InvalidOperationException(Resources.CanNotDeriveParametersForTextCommands);
}
// retrieve the proc definition from the cache.
string spName = command.CommandText;
if (spName.IndexOf(".") == -1)
{
spName = command.Connection.Database + "." + spName;
}
try
{
ProcedureCacheEntry entry = command.Connection.ProcedureCache.GetProcedure(command.Connection, spName, null);
command.Parameters.Clear();
foreach (MySqlSchemaRow row in entry.parameters.Rows)
{
MySqlParameter p = new MySqlParameter();
p.ParameterName = String.Format("@{0}", row["PARAMETER_NAME"]);
if (row["ORDINAL_POSITION"].Equals(0) && p.ParameterName == "@")
{
p.ParameterName = "@RETURN_VALUE";
}
p.Direction = GetDirection(row);
bool unsigned = StoredProcedure.GetFlags(row["DTD_IDENTIFIER"].ToString()).IndexOf("UNSIGNED") != -1;
bool real_as_float = entry.procedure.Rows[0]["SQL_MODE"].ToString().IndexOf("REAL_AS_FLOAT") != -1;
p.MySqlDbType = MetaData.NameToType(row["DATA_TYPE"].ToString(),
unsigned, real_as_float, command.Connection);
if (row["CHARACTER_MAXIMUM_LENGTH"] != null)
{
p.Size = (int)row["CHARACTER_MAXIMUM_LENGTH"];
}
#if NET452 || DNX452 || NETSTANDARD1_3
if (row["NUMERIC_PRECISION"] != null)
{
p.Precision = Convert.ToByte(row["NUMERIC_PRECISION"]);
}
if (row["NUMERIC_SCALE"] != null)
{
p.Scale = Convert.ToByte(row["NUMERIC_SCALE"]);
}
#endif
if (p.MySqlDbType == MySqlDbType.Set || p.MySqlDbType == MySqlDbType.Enum)
{
p.PossibleValues = GetPossibleValues(row);
}
command.Parameters.Add(p);
}
}
catch (InvalidOperationException ioe)
{
throw new MySqlException(Resources.UnableToDeriveParameters, ioe);
}
}
private static ProcedureCacheEntry GetProcData(MySqlConnection connection, string spName)
{
string schema = String.Empty;
string name = spName;
int dotIndex = spName.IndexOf(".");
if (dotIndex != -1)
{
schema = spName.Substring(0, dotIndex);
name = spName.Substring(dotIndex + 1, spName.Length - dotIndex - 1);
}
string[] restrictions = new string[4];
restrictions[1] = schema.Length > 0 ? schema : connection.CurrentDatabase();
restrictions[2] = name;
MySqlSchemaCollection proc = connection.GetSchemaCollection("procedures", restrictions);
if (proc.Rows.Count > 1)
{
throw new MySqlException(Resources.ProcAndFuncSameName);
}
if (proc.Rows.Count == 0)
{
throw new MySqlException(String.Format(Resources.InvalidProcName, name, schema));
}
ProcedureCacheEntry entry = new ProcedureCacheEntry();
entry.procedure = proc;
// we don't use GetSchema here because that would cause another
// query of procedures and we don't need that since we already
// know the procedure we care about.
ISSchemaProvider isp = new ISSchemaProvider(connection);
string[] rest = isp.CleanRestrictions(restrictions);
MySqlSchemaCollection parameters = isp.GetProcedureParameters(rest, proc);
entry.parameters = parameters;
return(entry);
}
private MySqlParameterCollection CheckParameters(string spName)
{
MySqlParameterCollection newParms = new MySqlParameterCollection(command);
MySqlParameter returnParameter = GetReturnParameter();
ProcedureCacheEntry entry = GetParameters(spName);
if (entry.procedure == null || entry.procedure.Rows.Count == 0)
{
throw new InvalidOperationException(String.Format(Resources.RoutineNotFound, spName));
}
bool realAsFloat = entry.procedure.Rows[0]["SQL_MODE"].ToString().IndexOf("REAL_AS_FLOAT") != -1;
foreach (MySqlSchemaRow param in entry.parameters.Rows)
{
newParms.Add(GetAndFixParameter(spName, param, realAsFloat, returnParameter));
}
return(newParms);
}
internal string GetCacheKey(string spName, ProcedureCacheEntry proc)
{
string retValue = String.Empty;
StringBuilder key = new StringBuilder(spName);
key.Append("(");
string delimiter = "";
if (proc.parameters != null)
{
foreach (MySqlSchemaRow row in proc.parameters.Rows)
{
if (row["ORDINAL_POSITION"].Equals(0))
retValue = "?=";
else
{
key.AppendFormat(CultureInfo.InvariantCulture, "{0}?", delimiter);
delimiter = ",";
}
}
}
key.Append(")");
return retValue + key.ToString();
}
private ProcedureCacheEntry AddNew(MySqlConnection connection, string spName)
{
ProcedureCacheEntry procData = GetProcData(connection, spName);
if (maxSize > 0)
{
string cacheKey = GetCacheKey(spName, procData);
int hash = cacheKey.GetHashCode();
lock (procHash)
{
if (procHash.Keys.Count >= maxSize)
{
TrimHash();
}
if (!procHash.ContainsKey(hash))
{
procHash[hash] = procData;
hashQueue.Enqueue(hash);
}
}
}
return(procData);
}
private static ProcedureCacheEntry GetProcData(MySqlConnection connection, string spName)
{
string schema = String.Empty;
string name = spName;
int dotIndex = spName.IndexOf(".");
if (dotIndex != -1)
{
schema = spName.Substring(0, dotIndex);
name = spName.Substring(dotIndex + 1, spName.Length - dotIndex - 1);
}
string[] restrictions = new string[4];
restrictions[1] = schema.Length > 0 ? schema : connection.CurrentDatabase();
restrictions[2] = name;
MySqlSchemaCollection proc = connection.GetSchemaCollection("procedures", restrictions);
if (proc.Rows.Count > 1)
throw new MySqlException(Resources.ProcAndFuncSameName);
if (proc.Rows.Count == 0)
throw new MySqlException(String.Format(Resources.InvalidProcName, name, schema));
ProcedureCacheEntry entry = new ProcedureCacheEntry();
entry.procedure = proc;
// we don't use GetSchema here because that would cause another
// query of procedures and we don't need that since we already
// know the procedure we care about.
ISSchemaProvider isp = new ISSchemaProvider(connection);
string[] rest = isp.CleanRestrictions(restrictions);
MySqlSchemaCollection parameters = isp.GetProcedureParameters(rest, proc);
entry.parameters = parameters;
return entry;
}
