/// <summary>
/// Loads the properties from the connected server into a hashtable
/// </summary>
/// <param name="connection"></param>
/// <returns></returns>
private Dictionary <string, string> LoadServerProperties(MyCatConnection connection)
{
// load server properties
Dictionary <string, string> hash = new Dictionary <string, string>();
MyCatCommand cmd = new MyCatCommand("SHOW VARIABLES", connection);
try
{
using (MyCatDataReader reader = cmd.ExecuteReader())
{
while (reader.Read())
{
string key = reader.GetString(0);
string value = reader.GetString(1);
hash[key] = value;
}
}
// Get time zone offset as numerical value
timeZoneOffset = TimeZoneInfo.Local.BaseUtcOffset.Hours;
return(hash);
}
catch (Exception ex)
{
MyCatTrace.LogError(ThreadID, ex.Message);
throw;
}
}
public override void CloseQuery(MyCatConnection connection, int statementId)
{
base.CloseQuery(connection, statementId);
MyCatTrace.TraceEvent(TraceEventType.Information, MyCatTraceEventType.QueryClosed,
Resources.TraceQueryDone, driverId);
}
public ProcedureCacheEntry GetProcedure(MyCatConnection 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)
{
MyCatTrace.LogInformation(conn.ServerThread,
String.Format(Resources.HardProcQuery, spName));
}
}
else
{
conn.PerfMonitor.AddSoftProcedureQuery();
if (conn.Settings.Logging)
{
MyCatTrace.LogInformation(conn.ServerThread,
String.Format(Resources.SoftProcQuery, spName));
}
}
return(proc);
}
public override int PrepareStatement(string sql, ref MyCatField[] parameters)
{
int statementId = base.PrepareStatement(sql, ref parameters);
MyCatTrace.TraceEvent(TraceEventType.Information, MyCatTraceEventType.StatementPrepared,
Resources.TraceStatementPrepared, driverId, sql, statementId);
return(statementId);
}
internal void HandleTimeoutOrThreadAbort(Exception ex)
{
bool isFatal = false;
if (isKillQueryConnection)
{
// Special connection started to cancel a query.
// Abort will prevent recursive connection spawning
Abort();
if (ex is TimeoutException)
{
Throw(new MyCatException(Resources.Timeout, true, ex));
}
else
{
return;
}
}
try
{
// Do a fast cancel.The reason behind small values for connection
// and command timeout is that we do not want user to wait longer
// after command has already expired.
// Microsoft's SqlClient seems to be using 5 seconds timeouts
// here as well.
// Read the error packet with "interrupted" message.
CancelQuery(5);
driver.ResetTimeout(5000);
if (Reader != null)
{
#if NETSTANDARD1_3
foreach (var x in Reader)
{
x.Dispose();
}
#else
foreach (var x in Reader)
{
x.Close();
}
#endif
Reader = null;
}
}
catch (Exception ex2)
{
MyCatTrace.LogWarning(ServerThread, "Could not kill query, " +
" aborting connection. Exception was " + ex2.Message);
Abort();
isFatal = true;
}
if (ex is TimeoutException)
{
Throw(new MyCatException(Resources.Timeout, isFatal, ex));
}
}
public override List <MyCatError> ReportWarnings(MyCatConnection connection)
{
List <MyCatError> warnings = base.ReportWarnings(connection);
foreach (MyCatError warning in warnings)
{
MyCatTrace.TraceEvent(TraceEventType.Warning, MyCatTraceEventType.Warning,
Resources.TraceWarning, driverId, warning.Level, warning.Code, warning.Message);
}
return(warnings);
}
public override void ExecuteStatement(MyCatPacket packetToExecute)
{
base.ExecuteStatement(packetToExecute);
int pos = packetToExecute.Position;
packetToExecute.Position = 1;
int statementId = packetToExecute.ReadInteger(4);
packetToExecute.Position = pos;
MyCatTrace.TraceEvent(TraceEventType.Information, MyCatTraceEventType.StatementExecuted,
Resources.TraceStatementExecuted, driverId, statementId, ThreadID);
}
internal void Abort()
{
try
{
driver.Close();
}
catch (Exception ex)
{
MyCatTrace.LogWarning(ServerThread, String.Concat("Error occurred aborting the connection. Exception was: ", ex.Message));
}
finally
{
this.isInUse = false;
}
SetState(ConnectionState.Closed, true);
}
protected override long GetResult(int statementId, ref long affectedRows, ref long insertedId)
{
try
{
var fieldCount = base.GetResult(statementId, ref affectedRows, ref insertedId);
MyCatTrace.TraceEvent(TraceEventType.Information, MyCatTraceEventType.ResultOpened,
Resources.TraceResult, driverId, fieldCount, affectedRows, insertedId);
return(fieldCount);
}
catch (MyCatException ex)
{
// we got an error so we report it
MyCatTrace.TraceEvent(TraceEventType.Information, MyCatTraceEventType.Error,
Resources.TraceOpenResultError, driverId, ex.Number, ex.Message);
throw ex;
}
}
public override bool FetchDataRow(int statementId, int columns)
{
try
{
bool b = base.FetchDataRow(statementId, columns);
if (b)
{
rowSizeInBytes += (handler as NativeDriver).Packet.Length;
}
return(b);
}
catch (MyCatException ex)
{
MyCatTrace.TraceEvent(TraceEventType.Error, MyCatTraceEventType.Error,
Resources.TraceFetchError, driverId, ex.Number, ex.Message);
throw ex;
}
}
public SystemPerformanceMonitor(MyCatConnection connection) : base(connection)
{
string categoryName = Resources.PerfMonCategoryName;
if (connection.Settings.UsePerformanceMonitor && procedureHardQueries == null)
{
try
{
procedureHardQueries = new PerformanceCounter(categoryName,
"HardProcedureQueries", false);
procedureSoftQueries = new PerformanceCounter(categoryName,
"SoftProcedureQueries", false);
}
catch (Exception ex)
{
MyCatTrace.LogError(connection.ServerThread, ex.Message);
}
}
}
public override ResultSet NextResult(int statementId, bool force)
{
// first let's see if we already have a resultset on this statementId
if (activeResult != null)
{
//oldRS = activeResults[statementId];
if (Settings.UseUsageAdvisor)
{
ReportUsageAdvisorWarnings(statementId, activeResult);
}
MyCatTrace.TraceEvent(TraceEventType.Information, MyCatTraceEventType.ResultClosed,
Resources.TraceResultClosed, driverId, activeResult.TotalRows, activeResult.SkippedRows,
rowSizeInBytes);
rowSizeInBytes = 0;
activeResult = null;
}
activeResult = base.NextResult(statementId, force);
return(activeResult);
}
private Driver TryToGetDriver()
{
int count = Interlocked.Decrement(ref available);
if (count < 0)
{
Interlocked.Increment(ref available);
return(null);
}
try
{
Driver driver = GetPooledConnection();
return(driver);
}
catch (Exception ex)
{
MyCatTrace.LogError(-1, ex.Message);
Interlocked.Increment(ref available);
throw;
}
}
/// <summary>
/// Loads all the current character set names and ids for this server
/// into the charSets hashtable
/// </summary>
private void LoadCharacterSets(MyCatConnection connection)
{
MyCatCommand cmd = new MyCatCommand("SHOW COLLATION", connection);
// now we load all the currently active collations
try
{
using (MyCatDataReader 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)
{
MyCatTrace.LogError(ThreadID, ex.Message);
throw;
}
}
public override void SendQuery(MyCatPacket p)
{
rowSizeInBytes = 0;
string cmdText = Encoding.GetString(p.Buffer, 5, p.Length - 5);
string normalized_query = null;
if (cmdText.Length > 300)
{
QueryNormalizer normalizer = new QueryNormalizer();
normalized_query = normalizer.Normalize(cmdText);
cmdText = cmdText.Substring(0, 300);
}
base.SendQuery(p);
MyCatTrace.TraceEvent(TraceEventType.Information, MyCatTraceEventType.QueryOpened,
Resources.TraceQueryOpened, driverId, ThreadID, cmdText);
if (normalized_query != null)
{
MyCatTrace.TraceEvent(TraceEventType.Information, MyCatTraceEventType.QueryNormalized,
Resources.TraceQueryNormalized, driverId, ThreadID, normalized_query);
}
}
public override void SetDatabase(string dbName)
{
base.SetDatabase(dbName);
MyCatTrace.TraceEvent(TraceEventType.Information, MyCatTraceEventType.NonQuery,
Resources.TraceSetDatabase, driverId, dbName);
}
private void ReportUsageAdvisorWarnings(int statementId, ResultSet rs)
{
#if !RT
if (!Settings.UseUsageAdvisor)
{
return;
}
if (HasStatus(ServerStatusFlags.NoIndex))
{
MyCatTrace.TraceEvent(TraceEventType.Warning, MyCatTraceEventType.UsageAdvisorWarning,
Resources.TraceUAWarningNoIndex, driverId, UsageAdvisorWarningFlags.NoIndex);
}
else if (HasStatus(ServerStatusFlags.BadIndex))
{
MyCatTrace.TraceEvent(TraceEventType.Warning, MyCatTraceEventType.UsageAdvisorWarning,
Resources.TraceUAWarningBadIndex, driverId, UsageAdvisorWarningFlags.BadIndex);
}
// report abandoned rows
if (rs.SkippedRows > 0)
{
MyCatTrace.TraceEvent(TraceEventType.Warning, MyCatTraceEventType.UsageAdvisorWarning,
Resources.TraceUAWarningSkippedRows, driverId, UsageAdvisorWarningFlags.SkippedRows, rs.SkippedRows);
}
// report not all fields accessed
if (!AllFieldsAccessed(rs))
{
StringBuilder notAccessed = new StringBuilder("");
string delimiter = "";
for (int i = 0; i < rs.Size; i++)
{
if (!rs.FieldRead(i))
{
notAccessed.AppendFormat("{0}{1}", delimiter, rs.Fields[i].ColumnName);
delimiter = ",";
}
}
MyCatTrace.TraceEvent(TraceEventType.Warning, MyCatTraceEventType.UsageAdvisorWarning,
Resources.TraceUAWarningSkippedColumns, driverId, UsageAdvisorWarningFlags.SkippedColumns,
notAccessed.ToString());
}
// report type conversions if any
if (rs.Fields != null)
{
foreach (MyCatField f in rs.Fields)
{
StringBuilder s = new StringBuilder();
string delimiter = "";
foreach (Type t in f.TypeConversions)
{
s.AppendFormat("{0}{1}", delimiter, t.Name);
delimiter = ",";
}
if (s.Length > 0)
{
MyCatTrace.TraceEvent(TraceEventType.Warning, MyCatTraceEventType.UsageAdvisorWarning,
Resources.TraceUAWarningFieldConversion, driverId, UsageAdvisorWarningFlags.FieldConversion,
f.ColumnName, s.ToString());
}
}
}
#endif
}
public override void Open()
{
base.Open();
MyCatTrace.TraceEvent(TraceEventType.Information, MyCatTraceEventType.ConnectionOpened,
Resources.TraceOpenConnection, driverId, Settings.ConnectionString, ThreadID);
}
public override void Close()
{
base.Close();
MyCatTrace.TraceEvent(TraceEventType.Information, MyCatTraceEventType.ConnectionClosed,
Resources.TraceCloseConnection, driverId);
}
public override void CloseStatement(int id)
{
base.CloseStatement(id);
MyCatTrace.TraceEvent(TraceEventType.Information, MyCatTraceEventType.StatementClosed,
Resources.TraceStatementClosed, driverId, id);
}
