public override ValueTask DescribeAsync(CancellationToken cancellationToken = default)
{
ClearStatusVector();
_fields = new Descriptor(_fields.ActualCount);
var sqlda = XsqldaMarshaler.MarshalManagedToNative(_db.Charset, _fields);
_db.FbClient.isc_dsql_describe(
_statusVector,
ref _handle,
IscCodes.SQLDA_VERSION1,
sqlda);
var descriptor = XsqldaMarshaler.MarshalNativeToManaged(_db.Charset, sqlda);
XsqldaMarshaler.CleanUpNativeData(ref sqlda);
_db.ProcessStatusVector(_statusVector);
_fields = descriptor;
return(ValueTask2.CompletedTask);
}
public override void Describe()
{
lock (this.db)
{
// Update structure
this.fields = new Descriptor(this.fields.ActualCount);
// Marshal structures to pointer
XsqldaMarshaler marshaler = XsqldaMarshaler.Instance;
IntPtr sqlda = marshaler.MarshalManagedToNative(this.db.Charset, fields);
int[] statusVector = ExtConnection.GetNewStatusVector();
int stmtHandle = this.handle;
SafeNativeMethods.isc_dsql_describe(
statusVector,
ref stmtHandle,
IscCodes.SQLDA_VERSION1,
sqlda);
// Marshal Pointer
Descriptor descriptor = marshaler.MarshalNativeToManaged(this.db.Charset, sqlda);
// Free memory
marshaler.CleanUpNativeData(ref sqlda);
// Parse status vector
this.db.ParseStatusVector(statusVector);
// Update field descriptor
this.fields = descriptor;
}
}
public override void Describe()
{
lock (_db)
{
// Clear the status vector
ClearStatusVector();
// Update structure
_fields = new Descriptor(_fields.ActualCount);
// Marshal structures to pointer
IntPtr sqlda = XsqldaMarshaler.MarshalManagedToNative(_db.Charset, _fields);
_db.FbClient.isc_dsql_describe(
_statusVector,
ref _handle,
IscCodes.SQLDA_VERSION1,
sqlda);
// Marshal Pointer
Descriptor descriptor = XsqldaMarshaler.MarshalNativeToManaged(_db.Charset, sqlda);
// Free memory
XsqldaMarshaler.CleanUpNativeData(ref sqlda);
// Parse status vector
_db.ProcessStatusVector(_statusVector);
// Update field descriptor
_fields = descriptor;
}
}
public override ValueTask DescribeParametersAsync(CancellationToken cancellationToken = default)
{
ClearStatusVector();
_parameters = new Descriptor(1);
var sqlda = XsqldaMarshaler.MarshalManagedToNative(_db.Charset, _parameters);
_db.FbClient.isc_dsql_describe_bind(
_statusVector,
ref _handle,
IscCodes.SQLDA_VERSION1,
sqlda);
var descriptor = XsqldaMarshaler.MarshalNativeToManaged(_db.Charset, sqlda);
_db.ProcessStatusVector(_statusVector);
if (descriptor.ActualCount != 0 && descriptor.Count != descriptor.ActualCount)
{
var n = descriptor.ActualCount;
descriptor = new Descriptor(n);
XsqldaMarshaler.CleanUpNativeData(ref sqlda);
sqlda = XsqldaMarshaler.MarshalManagedToNative(_db.Charset, descriptor);
_db.FbClient.isc_dsql_describe_bind(
_statusVector,
ref _handle,
IscCodes.SQLDA_VERSION1,
sqlda);
descriptor = XsqldaMarshaler.MarshalNativeToManaged(_db.Charset, sqlda);
XsqldaMarshaler.CleanUpNativeData(ref sqlda);
_db.ProcessStatusVector(_statusVector);
}
else
{
if (descriptor.ActualCount == 0)
{
descriptor = new Descriptor(0);
}
}
if (sqlda != IntPtr.Zero)
{
XsqldaMarshaler.CleanUpNativeData(ref sqlda);
}
_parameters = descriptor;
return(ValueTask2.CompletedTask);
}
public override async Task DescribeParameters(AsyncWrappingCommonArgs async)
{
ClearStatusVector();
_parameters = new Descriptor(1);
var sqlda = await XsqldaMarshaler.MarshalManagedToNative(_db.Charset, _parameters, async).ConfigureAwait(false);
_db.FbClient.isc_dsql_describe_bind(
_statusVector,
ref _handle,
IscCodes.SQLDA_VERSION1,
sqlda);
var descriptor = XsqldaMarshaler.MarshalNativeToManaged(_db.Charset, sqlda);
_db.ProcessStatusVector(_statusVector);
if (descriptor.ActualCount != 0 && descriptor.Count != descriptor.ActualCount)
{
var n = descriptor.ActualCount;
descriptor = new Descriptor(n);
XsqldaMarshaler.CleanUpNativeData(ref sqlda);
sqlda = await XsqldaMarshaler.MarshalManagedToNative(_db.Charset, descriptor, async).ConfigureAwait(false);
_db.FbClient.isc_dsql_describe_bind(
_statusVector,
ref _handle,
IscCodes.SQLDA_VERSION1,
sqlda);
descriptor = XsqldaMarshaler.MarshalNativeToManaged(_db.Charset, sqlda);
XsqldaMarshaler.CleanUpNativeData(ref sqlda);
_db.ProcessStatusVector(_statusVector);
}
else
{
if (descriptor.ActualCount == 0)
{
descriptor = new Descriptor(0);
}
}
if (sqlda != IntPtr.Zero)
{
XsqldaMarshaler.CleanUpNativeData(ref sqlda);
}
_parameters = descriptor;
}
public override async ValueTask PrepareAsync(string commandText, CancellationToken cancellationToken = default)
{
ClearAll();
ClearStatusVector();
if (State == StatementState.Deallocated)
{
Allocate();
}
_fields = new Descriptor(1);
var sqlda = XsqldaMarshaler.MarshalManagedToNative(_db.Charset, _fields);
var trHandle = _transaction.HandlePtr;
var buffer = _db.Charset.GetBytes(commandText);
_db.FbClient.isc_dsql_prepare(
_statusVector,
ref trHandle,
ref _handle,
(short)buffer.Length,
buffer,
_db.Dialect,
sqlda);
var descriptor = XsqldaMarshaler.MarshalNativeToManaged(_db.Charset, sqlda);
XsqldaMarshaler.CleanUpNativeData(ref sqlda);
_db.ProcessStatusVector(_statusVector);
_fields = descriptor;
if (_fields.ActualCount > 0 && _fields.ActualCount != _fields.Count)
{
Describe();
}
else
{
if (_fields.ActualCount == 0)
{
_fields = new Descriptor(0);
}
}
_fields.ResetValues();
DescribeParameters();
StatementType = await GetStatementTypeAsync(cancellationToken).ConfigureAwait(false);
State = StatementState.Prepared;
}
public override void Execute()
{
if (_state == StatementState.Deallocated)
{
throw new InvalidOperationException("Statment is not correctly created.");
}
ClearStatusVector();
var inSqlda = IntPtr.Zero;
var outSqlda = IntPtr.Zero;
if (_parameters != null)
{
inSqlda = XsqldaMarshaler.MarshalManagedToNative(_db.Charset, _parameters);
}
if (_statementType == DbStatementType.StoredProcedure)
{
Fields.ResetValues();
outSqlda = XsqldaMarshaler.MarshalManagedToNative(_db.Charset, _fields);
}
var trHandle = _transaction.HandlePtr;
_db.FbClient.isc_dsql_execute2(
_statusVector,
ref trHandle,
ref _handle,
IscCodes.SQLDA_VERSION1,
inSqlda,
outSqlda);
if (outSqlda != IntPtr.Zero)
{
var descriptor = XsqldaMarshaler.MarshalNativeToManaged(_db.Charset, outSqlda, true);
var values = new DbValue[descriptor.Count];
for (var i = 0; i < values.Length; i++)
{
values[i] = new DbValue(this, descriptor[i]);
}
_outputParams.Enqueue(values);
}
XsqldaMarshaler.CleanUpNativeData(ref inSqlda);
XsqldaMarshaler.CleanUpNativeData(ref outSqlda);
_db.ProcessStatusVector(_statusVector);
UpdateRecordsAffected();
_state = StatementState.Executed;
}
private void DescribeParameters()
{
ClearStatusVector();
_parameters = new Descriptor(1);
var sqlda = XsqldaMarshaler.MarshalManagedToNative(_db.Charset, _parameters);
_db.FbClient.isc_dsql_describe_bind(
_statusVector,
ref _handle,
IscCodes.SQLDA_VERSION1,
sqlda);
var descriptor = XsqldaMarshaler.MarshalNativeToManaged(_db.Charset, sqlda);
_db.ProcessStatusVector(_statusVector);
if (descriptor.ActualCount != 0 && descriptor.Count != descriptor.ActualCount)
{
var n = descriptor.ActualCount;
descriptor = new Descriptor(n);
XsqldaMarshaler.CleanUpNativeData(ref sqlda);
sqlda = XsqldaMarshaler.MarshalManagedToNative(_db.Charset, descriptor);
_db.FbClient.isc_dsql_describe_bind(
_statusVector,
ref _handle,
IscCodes.SQLDA_VERSION1,
sqlda);
descriptor = XsqldaMarshaler.MarshalNativeToManaged(_db.Charset, sqlda);
XsqldaMarshaler.CleanUpNativeData(ref sqlda);
_db.ProcessStatusVector(_statusVector);
}
else
{
if (descriptor.ActualCount == 0)
{
descriptor = new Descriptor(0);
}
}
if (sqlda != IntPtr.Zero)
{
XsqldaMarshaler.CleanUpNativeData(ref sqlda);
}
_parameters = descriptor;
}
public override void Prepare(string commandText)
{
ClearAll();
ClearStatusVector();
if (_state == StatementState.Deallocated)
{
Allocate();
}
_fields = new Descriptor(1);
IntPtr sqlda = XsqldaMarshaler.MarshalManagedToNative(_db.Charset, _fields);
TransactionHandle trHandle = _transaction.HandlePtr;
byte[] buffer = _db.Charset.GetBytes(commandText);
_db.FbClient.isc_dsql_prepare(
_statusVector,
ref trHandle,
ref _handle,
(short)buffer.Length,
buffer,
_db.Dialect,
sqlda);
Descriptor descriptor = XsqldaMarshaler.MarshalNativeToManaged(_db.Charset, sqlda);
XsqldaMarshaler.CleanUpNativeData(ref sqlda);
_db.ProcessStatusVector(_statusVector);
_fields = descriptor;
if (_fields.ActualCount > 0 && _fields.ActualCount != _fields.Count)
{
Describe();
}
else
{
if (_fields.ActualCount == 0)
{
_fields = new Descriptor(0);
}
}
_fields.ResetValues();
_statementType = GetStatementType();
_state = StatementState.Prepared;
}
private void Describe()
{
ClearStatusVector();
_fields = new Descriptor(_fields.ActualCount);
var sqlda = XsqldaMarshaler.MarshalManagedToNative(_db.Charset, _fields);
_db.FbClient.isc_dsql_describe(
_statusVector,
ref _handle,
IscCodes.SQLDA_VERSION1,
sqlda);
var descriptor = XsqldaMarshaler.MarshalNativeToManaged(_db.Charset, sqlda);
XsqldaMarshaler.CleanUpNativeData(ref sqlda);
_db.ProcessStatusVector(_statusVector);
_fields = descriptor;
}
public override async Task Describe(AsyncWrappingCommonArgs async)
{
ClearStatusVector();
_fields = new Descriptor(_fields.ActualCount);
var sqlda = await XsqldaMarshaler.MarshalManagedToNative(_db.Charset, _fields, async).ConfigureAwait(false);
_db.FbClient.isc_dsql_describe(
_statusVector,
ref _handle,
IscCodes.SQLDA_VERSION1,
sqlda);
var descriptor = XsqldaMarshaler.MarshalNativeToManaged(_db.Charset, sqlda);
XsqldaMarshaler.CleanUpNativeData(ref sqlda);
_db.ProcessStatusVector(_statusVector);
_fields = descriptor;
}
public override void Execute()
{
if (this.state == StatementState.Deallocated)
{
throw new InvalidOperationException("Statment is not correctly created.");
}
lock (this.db)
{
// Marshal structures to pointer
XsqldaMarshaler marshaler = XsqldaMarshaler.Instance;
IntPtr inSqlda = IntPtr.Zero;
IntPtr outSqlda = IntPtr.Zero;
if (this.parameters != null)
{
inSqlda = marshaler.MarshalManagedToNative(this.db.Charset, this.parameters);
}
if (this.statementType == DbStatementType.StoredProcedure)
{
this.Fields.ResetValues();
outSqlda = marshaler.MarshalManagedToNative(this.db.Charset, this.fields);
}
int[] statusVector = ExtConnection.GetNewStatusVector();
int trHandle = this.transaction.Handle;
int stmtHandle = this.handle;
SafeNativeMethods.isc_dsql_execute2(
statusVector,
ref trHandle,
ref stmtHandle,
IscCodes.SQLDA_VERSION1,
inSqlda,
outSqlda);
if (outSqlda != IntPtr.Zero)
{
Descriptor descriptor = marshaler.MarshalNativeToManaged(this.db.Charset, outSqlda);
// This would be an Execute procedure
DbValue[] values = new DbValue[descriptor.Count];
for (int i = 0; i < values.Length; i++)
{
values[i] = new DbValue(this, descriptor[i]);
}
this.outputParams.Enqueue(values);
}
// Free memory
marshaler.CleanUpNativeData(ref inSqlda);
marshaler.CleanUpNativeData(ref outSqlda);
this.db.ParseStatusVector(statusVector);
this.UpdateRecordsAffected();
this.state = StatementState.Executed;
}
}
public override DbValue[] Fetch()
{
DbValue[] row = null;
if (this.state == StatementState.Deallocated)
{
throw new InvalidOperationException("Statement is not correctly created.");
}
if (this.statementType != DbStatementType.Select &&
this.statementType != DbStatementType.SelectForUpdate)
{
return(null);
}
lock (this.db)
{
if (!this.allRowsFetched)
{
// Get the XSQLDA Marshaler
XsqldaMarshaler marshaler = XsqldaMarshaler.Instance;
// Reset actual field values
this.fields.ResetValues();
// Marshal structures to pointer
IntPtr sqlda = marshaler.MarshalManagedToNative(this.db.Charset, fields);
// Creta a new status vector
int[] statusVector = ExtConnection.GetNewStatusVector();
// Statement handle to be passed to the fetch method
int stmtHandle = this.handle;
// Fetch data
int status = SafeNativeMethods.isc_dsql_fetch(statusVector, ref stmtHandle, IscCodes.SQLDA_VERSION1, sqlda);
// Obtain values
Descriptor rowDesc = marshaler.MarshalNativeToManaged(this.db.Charset, sqlda);
if (this.fields.Count == rowDesc.Count)
{
// Try to preserve Array Handle information
for (int i = 0; i < this.fields.Count; i++)
{
if (this.fields[i].IsArray() && this.fields[i].ArrayHandle != null)
{
rowDesc[i].ArrayHandle = this.fields[i].ArrayHandle;
}
}
}
this.fields = rowDesc;
// Free memory
marshaler.CleanUpNativeData(ref sqlda);
// Parse status vector
this.db.ParseStatusVector(statusVector);
if (status == 100)
{
this.allRowsFetched = true;
}
else
{
// Set row values
row = new DbValue[this.fields.ActualCount];
for (int i = 0; i < row.Length; i++)
{
row[i] = new DbValue(this, this.fields[i]);
}
}
}
}
return(row);
}
public override void Execute()
{
EnsureNotDeallocated();
ClearStatusVector();
var inSqlda = IntPtr.Zero;
var outSqlda = IntPtr.Zero;
if (_parameters != null)
{
inSqlda = XsqldaMarshaler.MarshalManagedToNative(_db.Charset, _parameters);
}
if (StatementType == DbStatementType.StoredProcedure)
{
Fields.ResetValues();
outSqlda = XsqldaMarshaler.MarshalManagedToNative(_db.Charset, _fields);
}
var trHandle = _transaction.HandlePtr;
_db.FbClient.isc_dsql_execute2(
_statusVector,
ref trHandle,
ref _handle,
IscCodes.SQLDA_VERSION1,
inSqlda,
outSqlda);
if (outSqlda != IntPtr.Zero)
{
var descriptor = XsqldaMarshaler.MarshalNativeToManaged(_db.Charset, outSqlda, true);
var values = new DbValue[descriptor.Count];
for (var i = 0; i < values.Length; i++)
{
var d = descriptor[i];
var value = d.DbValue.GetValue();
values[i] = new DbValue(this, d, value);
}
OutputParameters.Enqueue(values);
}
XsqldaMarshaler.CleanUpNativeData(ref inSqlda);
XsqldaMarshaler.CleanUpNativeData(ref outSqlda);
_db.ProcessStatusVector(_statusVector);
if (DoRecordsAffected)
{
RecordsAffected = GetRecordsAffected();
}
else
{
RecordsAffected = -1;
}
State = StatementState.Executed;
}
public override void Prepare(string commandText)
{
// Clear data
this.ClearAll();
lock (this.db)
{
if (this.state == StatementState.Deallocated)
{
// Allocate statement
this.Allocate();
}
// Marshal structures to pointer
XsqldaMarshaler marshaler = XsqldaMarshaler.Instance;
// Setup fields structure
this.fields = new Descriptor(1);
IntPtr sqlda = marshaler.MarshalManagedToNative(this.db.Charset, this.fields);
int[] statusVector = ExtConnection.GetNewStatusVector();
int trHandle = this.transaction.Handle;
int stmtHandle = this.handle;
byte[] buffer = this.db.Charset.GetBytes(commandText);
SafeNativeMethods.isc_dsql_prepare(
statusVector,
ref trHandle,
ref stmtHandle,
(short)buffer.Length,
buffer,
this.db.Dialect,
sqlda);
// Marshal Pointer
Descriptor descriptor = marshaler.MarshalNativeToManaged(this.db.Charset, sqlda);
// Free memory
marshaler.CleanUpNativeData(ref sqlda);
// Parse status vector
this.db.ParseStatusVector(statusVector);
// Describe fields
this.fields = descriptor;
if (this.fields.ActualCount > 0 && this.fields.ActualCount != this.fields.Count)
{
this.Describe();
}
else
{
if (this.fields.ActualCount == 0)
{
this.fields = new Descriptor(0);
}
}
// Reset actual field values
this.fields.ResetValues();
// Get Statement type
this.statementType = this.GetStatementType();
// Update state
this.state = StatementState.Prepared;
}
}
public override DbValue[] Fetch()
{
DbValue[] row = null;
if (_state == StatementState.Deallocated)
{
throw new InvalidOperationException("Statement is not correctly created.");
}
if (_statementType == DbStatementType.StoredProcedure && !_allRowsFetched)
{
_allRowsFetched = true;
return(GetOutputParameters());
}
else if (_statementType == DbStatementType.Insert && _allRowsFetched)
{
return(null);
}
else if (_statementType != DbStatementType.Select && _statementType != DbStatementType.SelectForUpdate)
{
return(null);
}
if (!_allRowsFetched)
{
_fields.ResetValues();
if (_fetchSqlDa == IntPtr.Zero)
{
_fetchSqlDa = XsqldaMarshaler.MarshalManagedToNative(_db.Charset, _fields);
}
ClearStatusVector();
var status = _db.FbClient.isc_dsql_fetch(_statusVector, ref _handle, IscCodes.SQLDA_VERSION1, _fetchSqlDa);
var rowDesc = XsqldaMarshaler.MarshalNativeToManaged(_db.Charset, _fetchSqlDa, true);
if (_fields.Count == rowDesc.Count)
{
for (var i = 0; i < _fields.Count; i++)
{
if (_fields[i].IsArray() && _fields[i].ArrayHandle != null)
{
rowDesc[i].ArrayHandle = _fields[i].ArrayHandle;
}
}
}
_fields = rowDesc;
_db.ProcessStatusVector(_statusVector);
if (status == new IntPtr(100))
{
_allRowsFetched = true;
XsqldaMarshaler.CleanUpNativeData(ref _fetchSqlDa);
}
else
{
row = new DbValue[_fields.ActualCount];
for (var i = 0; i < row.Length; i++)
{
row[i] = new DbValue(this, _fields[i]);
}
}
}
return(row);
}
public override async ValueTask <DbValue[]> FetchAsync(CancellationToken cancellationToken = default)
{
EnsureNotDeallocated();
if (StatementType == DbStatementType.StoredProcedure && !_allRowsFetched)
{
_allRowsFetched = true;
return(GetOutputParameters());
}
else if (StatementType == DbStatementType.Insert && _allRowsFetched)
{
return(null);
}
else if (StatementType != DbStatementType.Select && StatementType != DbStatementType.SelectForUpdate)
{
return(null);
}
if (_allRowsFetched)
{
return(null);
}
_fields.ResetValues();
if (_fetchSqlDa == IntPtr.Zero)
{
_fetchSqlDa = XsqldaMarshaler.MarshalManagedToNative(_db.Charset, _fields);
}
ClearStatusVector();
var status = _db.FbClient.isc_dsql_fetch(_statusVector, ref _handle, IscCodes.SQLDA_VERSION1, _fetchSqlDa);
if (status == new IntPtr(100))
{
_allRowsFetched = true;
XsqldaMarshaler.CleanUpNativeData(ref _fetchSqlDa);
return(null);
}
else
{
var rowDesc = XsqldaMarshaler.MarshalNativeToManaged(_db.Charset, _fetchSqlDa, true);
if (_fields.Count == rowDesc.Count)
{
for (var i = 0; i < _fields.Count; i++)
{
if (_fields[i].IsArray() && _fields[i].ArrayHandle != null)
{
rowDesc[i].ArrayHandle = _fields[i].ArrayHandle;
}
}
}
_fields = rowDesc;
_db.ProcessStatusVector(_statusVector);
var row = new DbValue[_fields.ActualCount];
for (var i = 0; i < row.Length; i++)
{
var d = _fields[i];
var value = await d.DbValue.GetValueAsync(cancellationToken).ConfigureAwait(false);
row[i] = new DbValue(this, d, value);
}
return(row);
}
}
public override async ValueTask ExecuteAsync(int timeout, IDescriptorFiller descriptorFiller, CancellationToken cancellationToken = default)
{
EnsureNotDeallocated();
await descriptorFiller.FillAsync(_parameters, 0, cancellationToken).ConfigureAwait(false);
ClearStatusVector();
NativeHelpers.CallIfExists(() =>
{
_db.FbClient.fb_dsql_set_timeout(_statusVector, ref _handle, (uint)timeout);
_db.ProcessStatusVector(_statusVector);
});
ClearStatusVector();
var inSqlda = IntPtr.Zero;
var outSqlda = IntPtr.Zero;
if (_parameters != null)
{
inSqlda = XsqldaMarshaler.MarshalManagedToNative(_db.Charset, _parameters);
}
if (StatementType == DbStatementType.StoredProcedure)
{
Fields.ResetValues();
outSqlda = XsqldaMarshaler.MarshalManagedToNative(_db.Charset, _fields);
}
var trHandle = _transaction.HandlePtr;
_db.FbClient.isc_dsql_execute2(
_statusVector,
ref trHandle,
ref _handle,
IscCodes.SQLDA_VERSION1,
inSqlda,
outSqlda);
if (outSqlda != IntPtr.Zero)
{
var descriptor = XsqldaMarshaler.MarshalNativeToManaged(_db.Charset, outSqlda, true);
var values = new DbValue[descriptor.Count];
for (var i = 0; i < values.Length; i++)
{
var d = descriptor[i];
var value = await d.DbValue.GetValueAsync(cancellationToken).ConfigureAwait(false);
values[i] = new DbValue(this, d, value);
}
OutputParameters.Enqueue(values);
}
XsqldaMarshaler.CleanUpNativeData(ref inSqlda);
XsqldaMarshaler.CleanUpNativeData(ref outSqlda);
_db.ProcessStatusVector(_statusVector);
if (DoRecordsAffected)
{
RecordsAffected = await GetRecordsAffectedAsync(cancellationToken).ConfigureAwait(false);
}
else
{
RecordsAffected = -1;
}
State = StatementState.Executed;
}
public override void Prepare(string commandText)
{
// Clear data
ClearAll();
lock (_db)
{
// Clear the status vector
ClearStatusVector();
// Allocate the statement if needed
if (_state == StatementState.Deallocated)
{
Allocate();
}
// Marshal structures to pointer
// Setup fields structure
_fields = new Descriptor(1);
IntPtr sqlda = XsqldaMarshaler.MarshalManagedToNative(_db.Charset, _fields);
TransactionHandle trHandle = _transaction.HandlePtr;
byte[] buffer = _db.Charset.GetBytes(commandText);
_db.FbClient.isc_dsql_prepare(
_statusVector,
ref trHandle,
ref _handle,
(short)buffer.Length,
buffer,
_db.Dialect,
sqlda);
// Marshal Pointer
Descriptor descriptor = XsqldaMarshaler.MarshalNativeToManaged(_db.Charset, sqlda);
// Free memory
XsqldaMarshaler.CleanUpNativeData(ref sqlda);
// Parse status vector
_db.ProcessStatusVector(_statusVector);
// Describe fields
_fields = descriptor;
if (_fields.ActualCount > 0 && _fields.ActualCount != _fields.Count)
{
Describe();
}
else
{
if (_fields.ActualCount == 0)
{
_fields = new Descriptor(0);
}
}
// Reset actual field values
_fields.ResetValues();
// Get Statement type
_statementType = GetStatementType();
// Update state
_state = StatementState.Prepared;
}
}
public override DbValue[] Fetch()
{
DbValue[] row = null;
if (_state == StatementState.Deallocated)
{
throw new InvalidOperationException("Statement is not correctly created.");
}
if (_statementType != DbStatementType.Select &&
_statementType != DbStatementType.SelectForUpdate)
{
return(null);
}
lock (_db)
{
if (!_allRowsFetched)
{
// Get the XSQLDA Marshaler
// Reset actual field values
_fields.ResetValues();
// Marshal structures to pointer
if (_fetchSqlDa == IntPtr.Zero)
{
_fetchSqlDa = XsqldaMarshaler.MarshalManagedToNative(_db.Charset, _fields);
}
// Clear the status vector
ClearStatusVector();
// Statement handle to be passed to the fetch method
// Fetch data
IntPtr status = _db.FbClient.isc_dsql_fetch(_statusVector, ref _handle, IscCodes.SQLDA_VERSION1, _fetchSqlDa);
// Obtain values
Descriptor rowDesc = XsqldaMarshaler.MarshalNativeToManaged(_db.Charset, _fetchSqlDa, true);
if (_fields.Count == rowDesc.Count)
{
// Try to preserve Array Handle information
for (int i = 0; i < _fields.Count; i++)
{
if (_fields[i].IsArray() && _fields[i].ArrayHandle != null)
{
rowDesc[i].ArrayHandle = _fields[i].ArrayHandle;
}
}
}
_fields = rowDesc;
// Parse status vector
_db.ProcessStatusVector(_statusVector);
if (status == new IntPtr(100))
{
_allRowsFetched = true;
XsqldaMarshaler.CleanUpNativeData(ref _fetchSqlDa);
}
else
{
// Set row values
row = new DbValue[_fields.ActualCount];
for (int i = 0; i < row.Length; i++)
{
row[i] = new DbValue(this, _fields[i]);
}
}
}
}
return(row);
}
public override void DescribeParameters()
{
lock (this.db)
{
// Marshal structures to pointer
XsqldaMarshaler marshaler = XsqldaMarshaler.Instance;
this.parameters = new Descriptor(1);
IntPtr sqlda = marshaler.MarshalManagedToNative(this.db.Charset, parameters);
int[] statusVector = ExtConnection.GetNewStatusVector();
int stmtHandle = this.handle;
SafeNativeMethods.isc_dsql_describe_bind(
statusVector,
ref stmtHandle,
IscCodes.SQLDA_VERSION1,
sqlda);
Descriptor descriptor = marshaler.MarshalNativeToManaged(this.db.Charset, sqlda);
// Parse status vector
this.db.ParseStatusVector(statusVector);
if (descriptor.ActualCount != 0 && descriptor.Count != descriptor.ActualCount)
{
short n = descriptor.ActualCount;
descriptor = new Descriptor(n);
// Fre memory
marshaler.CleanUpNativeData(ref sqlda);
// Marshal new structure
sqlda = marshaler.MarshalManagedToNative(this.db.Charset, descriptor);
SafeNativeMethods.isc_dsql_describe_bind(
statusVector,
ref stmtHandle,
IscCodes.SQLDA_VERSION1,
sqlda);
descriptor = marshaler.MarshalNativeToManaged(this.db.Charset, sqlda);
// Free memory
marshaler.CleanUpNativeData(ref sqlda);
// Parse status vector
this.db.ParseStatusVector(statusVector);
}
else
{
if (descriptor.ActualCount == 0)
{
descriptor = new Descriptor(0);
}
}
// Free memory
if (sqlda != IntPtr.Zero)
{
marshaler.CleanUpNativeData(ref sqlda);
}
// Update parameter descriptor
this.parameters = descriptor;
}
}
public override void DescribeParameters()
{
lock (_db)
{
// Clear the status vector
ClearStatusVector();
// Marshal structures to pointer
_parameters = new Descriptor(1);
IntPtr sqlda = XsqldaMarshaler.MarshalManagedToNative(_db.Charset, _parameters);
_db.FbClient.isc_dsql_describe_bind(
_statusVector,
ref _handle,
IscCodes.SQLDA_VERSION1,
sqlda);
Descriptor descriptor = XsqldaMarshaler.MarshalNativeToManaged(_db.Charset, sqlda);
// Parse status vector
_db.ProcessStatusVector(_statusVector);
if (descriptor.ActualCount != 0 && descriptor.Count != descriptor.ActualCount)
{
short n = descriptor.ActualCount;
descriptor = new Descriptor(n);
// Fre memory
XsqldaMarshaler.CleanUpNativeData(ref sqlda);
// Marshal new structure
sqlda = XsqldaMarshaler.MarshalManagedToNative(_db.Charset, descriptor);
_db.FbClient.isc_dsql_describe_bind(
_statusVector,
ref _handle,
IscCodes.SQLDA_VERSION1,
sqlda);
descriptor = XsqldaMarshaler.MarshalNativeToManaged(_db.Charset, sqlda);
// Free memory
XsqldaMarshaler.CleanUpNativeData(ref sqlda);
// Parse status vector
_db.ProcessStatusVector(_statusVector);
}
else
{
if (descriptor.ActualCount == 0)
{
descriptor = new Descriptor(0);
}
}
// Free memory
if (sqlda != IntPtr.Zero)
{
XsqldaMarshaler.CleanUpNativeData(ref sqlda);
}
// Update parameter descriptor
_parameters = descriptor;
}
}