internal ForwardsOnlyDataReader GetReader(CommandBehavior cb)
{
CheckConnectionState();
// Block the notification thread before writing anything to the wire.
using (m_Connector.BlockNotificationThread())
{
IEnumerable <IServerResponseObject> responseEnum;
ForwardsOnlyDataReader reader;
m_Connector.SetBackendCommandTimeout(CommandTimeout);
if (prepared == PrepareStatus.NeedsPrepare)
{
PrepareInternal();
}
if (prepared == PrepareStatus.NotPrepared || prepared == PrepareStatus.V2Prepared)
{
NpgsqlQuery query;
byte[] commandText = GetCommandText();
query = NpgsqlQuery.Create(m_Connector.BackendProtocolVersion, commandText);
// Write the Query message to the wire.
m_Connector.Query(query);
// Tell to mediator what command is being sent.
if (prepared == PrepareStatus.NotPrepared)
{
m_Connector.Mediator.SetSqlSent(commandText, NpgsqlMediator.SQLSentType.Simple);
}
else
{
m_Connector.Mediator.SetSqlSent(preparedCommandText, NpgsqlMediator.SQLSentType.Execute);
}
// Flush and wait for responses.
responseEnum = m_Connector.ProcessBackendResponsesEnum();
// Construct the return reader.
reader = new ForwardsOnlyDataReader(
responseEnum,
cb,
this,
m_Connector.BlockNotificationThread()
);
if (
commandType == CommandType.StoredProcedure &&
reader.FieldCount == 1 &&
reader.GetDataTypeName(0) == "refcursor"
)
{
// When a function returns a sole column of refcursor, transparently
// FETCH ALL from every such cursor and return those results.
StringWriter sw = new StringWriter();
string queryText;
while (reader.Read())
{
sw.WriteLine("FETCH ALL FROM \"{0}\";", reader.GetString(0));
}
reader.Dispose();
queryText = sw.ToString();
if (queryText == "")
{
queryText = ";";
}
// Passthrough the commandtimeout to the inner command, so user can also control its timeout.
// TODO: Check if there is a better way to handle that.
query = NpgsqlQuery.Create(m_Connector.BackendProtocolVersion, queryText);
// Write the Query message to the wire.
m_Connector.Query(query);
// Flush and wait for responses.
responseEnum = m_Connector.ProcessBackendResponsesEnum();
// Construct the return reader.
reader = new ForwardsOnlyDataReader(
responseEnum,
cb,
this,
m_Connector.BlockNotificationThread()
);
}
}
else
{
// Update the Bind object with current parameter data as needed.
BindParameters();
// Write the Bind, Execute, and Sync message to the wire.
m_Connector.Bind(bind);
m_Connector.Execute(execute);
m_Connector.Sync();
// Tell to mediator what command is being sent.
m_Connector.Mediator.SetSqlSent(preparedCommandText, NpgsqlMediator.SQLSentType.Execute);
// Flush and wait for responses.
responseEnum = m_Connector.ProcessBackendResponsesEnum();
// Construct the return reader, possibly with a saved row description from Prepare().
reader = new ForwardsOnlyDataReader(
responseEnum,
cb,
this,
m_Connector.BlockNotificationThread(),
true,
currentRowDescription
);
}
return(reader);
}
}
internal ForwardsOnlyDataReader GetReader(CommandBehavior cb)
{
try
{
CheckConnectionState();
// reset any responses just before getting new ones
Connector.Mediator.ResetResponses();
// Set command timeout.
m_Connector.Mediator.CommandTimeout = CommandTimeout;
using (m_Connector.BlockNotificationThread())
{
ForwardsOnlyDataReader reader;
if (parse == null)
{
reader = new ForwardsOnlyDataReader(m_Connector.QueryEnum(this), cb, this,
m_Connector.BlockNotificationThread(), false);
if (type == CommandType.StoredProcedure
&& reader.FieldCount == 1
&& reader.GetDataTypeName(0) == "refcursor")
{
// When a function returns a sole column of refcursor, transparently
// FETCH ALL from every such cursor and return those results.
StringBuilder sb = new StringBuilder();
while (reader.Read())
{
sb.Append("fetch all from \"").Append(reader.GetString(0)).Append("\";");
}
sb.Append(";"); // Just in case the list of cursors is empty.
reader = new NpgsqlCommand(sb.ToString(), Connection).GetReader(reader._behavior);
}
}
else
{
BindParameters();
reader = new ForwardsOnlyDataReader(m_Connector.ExecuteEnum(new NpgsqlExecute(bind.PortalName, 0)), cb, this,
m_Connector.BlockNotificationThread(), true);
}
return reader;
}
}
catch (IOException ex)
{
throw ClearPoolAndCreateException(ex);
}
}
internal ForwardsOnlyDataReader GetReader(CommandBehavior cb)
{
try
{
CheckConnectionState();
var connector = Connector;
if (PreparedQuery != null)
connector.PrepareOrAdd(PreparedQuery, PreparedParams, text);
// reset any responses just before getting new ones
connector.Mediator.ResetResponses();
// Set command timeout.
connector.Mediator.CommandTimeout = CommandTimeout;
using (connector.BlockNotificationThread())
{
ForwardsOnlyDataReader reader;
if (parse == null)
{
reader = new ForwardsOnlyDataReader(connector.QueryEnum(this), cb, this,
connector.BlockNotificationThread(), false);
if (type == CommandType.StoredProcedure
&& reader.FieldCount == 1
&& reader.GetDataTypeName(0) == "refcursor")
{
// When a function returns a sole column of refcursor, transparently
// FETCH ALL from every such cursor and return those results.
StringBuilder sb = new StringBuilder();
while (reader.Read())
{
sb.Append("fetch all from \"").Append(reader.GetString(0)).Append("\";");
}
sb.Append(";"); // Just in case the list of cursors is empty.
//reader = new NpgsqlCommand(sb.ToString(), Connection).GetReader(reader._behavior);
// Passthrough the commandtimeout to the inner command, so user can also control its timeout.
// TODO: Check if there is a better way to handle that.
NpgsqlCommand c = new NpgsqlCommand(sb.ToString(), Connection);
c.CommandTimeout = this.CommandTimeout;
reader = c.GetReader(reader._behavior);
}
}
else
{
BindParameters();
reader = new ForwardsOnlyDataReader(connector.ExecuteEnum(new NpgsqlExecute(bind.PortalName, 0)), cb, this,
connector.BlockNotificationThread(), true);
}
return reader;
}
}
catch (IOException ex)
{
throw ClearPoolAndCreateException(ex);
}
}
internal ForwardsOnlyDataReader GetReader(CommandBehavior cb)
{
CheckConnectionState();
// Block the notification thread before writing anything to the wire.
using (m_Connector.BlockNotificationThread())
{
IEnumerable<IServerResponseObject> responseEnum;
ForwardsOnlyDataReader reader;
m_Connector.SetBackendCommandTimeout(CommandTimeout);
if (prepared == PrepareStatus.NeedsPrepare)
{
PrepareInternal();
}
if (prepared == PrepareStatus.NotPrepared)
{
NpgsqlQuery query;
byte[] commandText = GetCommandText();
query = new NpgsqlQuery(commandText);
// Write the Query message to the wire.
m_Connector.Query(query);
// Tell to mediator what command is being sent.
if (prepared == PrepareStatus.NotPrepared)
{
m_Connector.Mediator.SetSqlSent(commandText, NpgsqlMediator.SQLSentType.Simple);
}
else
{
m_Connector.Mediator.SetSqlSent(preparedCommandText, NpgsqlMediator.SQLSentType.Execute);
}
// Flush and wait for responses.
responseEnum = m_Connector.ProcessBackendResponsesEnum();
// Construct the return reader.
reader = new ForwardsOnlyDataReader(
responseEnum,
cb,
this,
m_Connector.BlockNotificationThread()
);
if (
commandType == CommandType.StoredProcedure
&& reader.FieldCount == 1
&& reader.GetDataTypeName(0) == "refcursor"
)
{
// When a function returns a sole column of refcursor, transparently
// FETCH ALL from every such cursor and return those results.
StringWriter sw = new StringWriter();
string queryText;
while (reader.Read())
{
sw.WriteLine("FETCH ALL FROM \"{0}\";", reader.GetString(0));
}
reader.Dispose();
queryText = sw.ToString();
if (queryText == "")
{
queryText = ";";
}
// Passthrough the commandtimeout to the inner command, so user can also control its timeout.
// TODO: Check if there is a better way to handle that.
query = new NpgsqlQuery(queryText);
// Write the Query message to the wire.
m_Connector.Query(query);
// Flush and wait for responses.
responseEnum = m_Connector.ProcessBackendResponsesEnum();
// Construct the return reader.
reader = new ForwardsOnlyDataReader(
responseEnum,
cb,
this,
m_Connector.BlockNotificationThread()
);
}
}
else
{
// Update the Bind object with current parameter data as needed.
BindParameters();
// Write the Bind, Execute, and Sync message to the wire.
m_Connector.Bind(bind);
m_Connector.Execute(execute);
m_Connector.Sync();
// Tell to mediator what command is being sent.
m_Connector.Mediator.SetSqlSent(preparedCommandText, NpgsqlMediator.SQLSentType.Execute);
// Flush and wait for responses.
responseEnum = m_Connector.ProcessBackendResponsesEnum();
// Construct the return reader, possibly with a saved row description from Prepare().
reader = new ForwardsOnlyDataReader(
responseEnum,
cb,
this,
m_Connector.BlockNotificationThread(),
true,
currentRowDescription
);
}
return reader;
}
}
internal ForwardsOnlyDataReader GetReader(CommandBehavior cb)
{
CheckConnectionState();
// reset any responses just before getting new ones
Connector.Mediator.ResetResponses();
// Set command timeout.
m_Connector.Mediator.CommandTimeout = CommandTimeout;
// Block the notification thread before writing anything to the wire.
using (m_Connector.BlockNotificationThread())
{
IEnumerable<IServerResponseObject> responseEnum;
ForwardsOnlyDataReader reader;
if (prepared == PrepareStatus.NeedsPrepare)
{
PrepareInternal();
}
if (prepared == PrepareStatus.NotPrepared || prepared == PrepareStatus.V2Prepared)
{
NpgsqlQuery query;
query = new NpgsqlQuery(m_Connector, GetCommandText());
// Write the Query message to the wire.
m_Connector.Query(query);
// Flush and wait for responses.
responseEnum = m_Connector.ProcessBackendResponsesEnum();
// Construct the return reader.
reader = new ForwardsOnlyDataReader(
responseEnum,
cb,
this,
m_Connector.BlockNotificationThread()
);
if (
type == CommandType.StoredProcedure
&& reader.FieldCount == 1
&& reader.GetDataTypeName(0) == "refcursor"
)
{
// When a function returns a sole column of refcursor, transparently
// FETCH ALL from every such cursor and return those results.
StringWriter sw = new StringWriter();
string queryText;
while (reader.Read())
{
sw.WriteLine("FETCH ALL FROM \"{0}\";", reader.GetString(0));
}
reader.Dispose();
queryText = sw.ToString();
if (queryText == "")
{
queryText = ";";
}
// Passthrough the commandtimeout to the inner command, so user can also control its timeout.
// TODO: Check if there is a better way to handle that.
query = new NpgsqlQuery(m_Connector, queryText);
// Write the Query message to the wire.
m_Connector.Query(query);
// Flush and wait for responses.
responseEnum = m_Connector.ProcessBackendResponsesEnum();
// Construct the return reader.
reader = new ForwardsOnlyDataReader(
responseEnum,
cb,
this,
m_Connector.BlockNotificationThread()
);
}
}
else
{
bool sendPortalDescribe = ! portalDescribeSent;
// Update the Bind object with current parameter data as needed.
BindParameters();
// Write the Bind message to the wire.
m_Connector.Bind(bind);
if (sendPortalDescribe)
{
NpgsqlDescribe portalDescribe = new NpgsqlDescribePortal(bind.PortalName);
// Write a Describe message to the wire.
m_Connector.Describe(portalDescribe);
portalDescribeSent = true;
}
// Finally, write the Execute and Sync messages to the wire.
m_Connector.Execute(execute);
m_Connector.Sync();
// Flush and wait for responses.
responseEnum = m_Connector.ProcessBackendResponsesEnum();
// Construct the return reader, possibly with a saved row description.
reader = new ForwardsOnlyDataReader(
responseEnum,
cb,
this,
m_Connector.BlockNotificationThread(),
true,
currentRowDescription
);
if (sendPortalDescribe)
{
// We sent a Describe message. If the query produces a result set,
// PG sent a row description, and the reader has now found it,
currentRowDescription = reader.CurrentDescription;
}
}
return reader;
}
}
