internal void Parse(NpgsqlParse parse)
{
CurrentState.Parse(this, parse);
}
public virtual void Parse(NpgsqlConnector context, NpgsqlParse parse)
{
throw new InvalidOperationException("Internal Error! " + this);
}
public override void Parse(NpgsqlConnector context, NpgsqlParse parse)
{
NpgsqlEventLog.LogMethodEnter(LogLevel.Debug, CLASSNAME, "Parse");
parse.WriteToStream(context.Stream);
}
private void PrepareInternal()
{
// Use the extended query parsing...
planName = m_Connector.NextPlanName();
String portalName = "";
preparedCommandText = GetCommandText(true);
NpgsqlParse parse = new NpgsqlParse(planName, preparedCommandText, new Int32[] { });
NpgsqlDescribe statementDescribe = new NpgsqlDescribeStatement(planName);
IEnumerable <IServerResponseObject> responseEnum;
NpgsqlRowDescription returnRowDesc = null;
// Write Parse, Describe, and Sync messages to the wire.
m_Connector.Parse(parse);
m_Connector.Describe(statementDescribe);
m_Connector.Sync();
// Tell to mediator what command is being sent.
m_Connector.Mediator.SetSqlSent(preparedCommandText, NpgsqlMediator.SQLSentType.Parse);
// Flush and wait for response.
responseEnum = m_Connector.ProcessBackendResponsesEnum();
// Look for a NpgsqlRowDescription in the responses, discarding everything else.
foreach (IServerResponseObject response in responseEnum)
{
if (response is NpgsqlRowDescription)
{
returnRowDesc = (NpgsqlRowDescription)response;
}
else if (response is IDisposable)
{
(response as IDisposable).Dispose();
}
}
Int16[] resultFormatCodes;
if (returnRowDesc != null)
{
resultFormatCodes = new Int16[returnRowDesc.NumFields];
for (int i = 0; i < returnRowDesc.NumFields; i++)
{
NpgsqlRowDescription.FieldData returnRowDescData = returnRowDesc[i];
if (returnRowDescData.TypeInfo != null)
{
// Binary format?
// PG always defaults to text encoding. We can fix up the row description
// here based on support for binary encoding. Once this is done,
// there is no need to request another row description after Bind.
returnRowDescData.FormatCode = returnRowDescData.TypeInfo.SupportsBinaryBackendData ? FormatCode.Binary : FormatCode.Text;
resultFormatCodes[i] = (Int16)returnRowDescData.FormatCode;
}
else
{
// Text format (default).
resultFormatCodes[i] = (Int16)FormatCode.Text;
}
}
}
else
{
resultFormatCodes = new Int16[] { 0 };
}
// Save the row description for use with all future Executes.
currentRowDescription = returnRowDesc;
// The Bind and Execute message objects live through multiple Executes.
// Only Bind changes at all between Executes, which is done in BindParameters().
bind = new NpgsqlBind(portalName, planName, new Int16[Parameters.Count], null, resultFormatCodes);
execute = new NpgsqlExecute(portalName, 0);
PrepareStatus = PrepareStatus.Prepared;
}