| private SetToNullOfType ( StorageType storageType ) : void | ||
| storageType | StorageType | |
| Результат | void | |
private static void GetNullOutputParameterSmi(SmiMetaData metaData, SqlBuffer targetBuffer, ref object result) {
if (SqlDbType.Udt == metaData.SqlDbType) {
result = NullUdtInstance(metaData);
}
else {
SqlBuffer.StorageType stype = SqlDbTypeToStorageType(metaData.SqlDbType);
if ( SqlBuffer.StorageType.Empty == stype ) {
result = DBNull.Value;
}
else if (SqlBuffer.StorageType.SqlBinary == stype) {
// special case SqlBinary, 'cause tds parser never sets SqlBuffer to null, just to empty!
targetBuffer.SqlBinary = SqlBinary.Null;
}
else if (SqlBuffer.StorageType.SqlGuid == stype) {
targetBuffer.SqlGuid = SqlGuid.Null;
}
else {
targetBuffer.SetToNullOfType( stype );
}
}
}
internal object GetNullSqlValue(SqlBuffer nullVal, SqlMetaDataPriv md)
{
switch (md.type)
{
case SqlDbType.Real:
nullVal.SetToNullOfType(SqlBuffer.StorageType.Single);
break;
case SqlDbType.Float:
nullVal.SetToNullOfType(SqlBuffer.StorageType.Double);
break;
case SqlDbType.Udt:
case SqlDbType.Binary:
case SqlDbType.VarBinary:
case SqlDbType.Image:
nullVal.SqlBinary = SqlBinary.Null;
break;
case SqlDbType.UniqueIdentifier:
nullVal.SqlGuid = SqlGuid.Null;
break;
case SqlDbType.Bit:
nullVal.SetToNullOfType(SqlBuffer.StorageType.Boolean);
break;
case SqlDbType.TinyInt:
nullVal.SetToNullOfType(SqlBuffer.StorageType.Byte);
break;
case SqlDbType.SmallInt:
nullVal.SetToNullOfType(SqlBuffer.StorageType.Int16);
break;
case SqlDbType.Int:
nullVal.SetToNullOfType(SqlBuffer.StorageType.Int32);
break;
case SqlDbType.BigInt:
nullVal.SetToNullOfType(SqlBuffer.StorageType.Int64);
break;
case SqlDbType.Char:
case SqlDbType.VarChar:
case SqlDbType.NChar:
case SqlDbType.NVarChar:
case SqlDbType.Text:
case SqlDbType.NText:
nullVal.SetToNullOfType(SqlBuffer.StorageType.String);
break;
case SqlDbType.Decimal:
nullVal.SetToNullOfType(SqlBuffer.StorageType.Decimal);
break;
case SqlDbType.DateTime:
case SqlDbType.SmallDateTime:
nullVal.SetToNullOfType(SqlBuffer.StorageType.DateTime);
break;
case SqlDbType.Money:
case SqlDbType.SmallMoney:
nullVal.SetToNullOfType(SqlBuffer.StorageType.Money);
break;
case SqlDbType.Variant:
// DBNull.Value will have to work here
nullVal.SetToNullOfType(SqlBuffer.StorageType.Empty);
break;
case SqlDbType.Xml:
nullVal.SqlCachedBuffer = SqlCachedBuffer.Null;
break;
case SqlDbType.Date:
nullVal.SetToNullOfType(SqlBuffer.StorageType.Date);
break;
case SqlDbType.Time:
nullVal.SetToNullOfType(SqlBuffer.StorageType.Time);
break;
case SqlDbType.DateTime2:
nullVal.SetToNullOfType(SqlBuffer.StorageType.DateTime2);
break;
case SqlDbType.DateTimeOffset:
nullVal.SetToNullOfType(SqlBuffer.StorageType.DateTimeOffset);
break;
case SqlDbType.Timestamp:
break;
default:
Debug.Assert(false, "unknown null sqlType!" + md.type.ToString());
break;
}
return nullVal;
}
internal static object GetNullSqlValue(
SqlBuffer nullVal,
SqlMetaDataPriv md,
SqlCommandColumnEncryptionSetting columnEncryptionSetting,
SqlInternalConnectionTds connection) {
SqlDbType type = md.type;
if (type == SqlDbType.VarBinary && // if its a varbinary
md.isEncrypted &&// and encrypted
ShouldHonorTceForRead(columnEncryptionSetting, connection)){
type = md.baseTI.type; // the use the actual (plaintext) type
}
switch (type) {
case SqlDbType.Real:
nullVal.SetToNullOfType(SqlBuffer.StorageType.Single);
break;
case SqlDbType.Float:
nullVal.SetToNullOfType(SqlBuffer.StorageType.Double);
break;
case SqlDbType.Udt:
case SqlDbType.Binary:
case SqlDbType.VarBinary:
case SqlDbType.Image:
nullVal.SqlBinary = SqlBinary.Null;
break;
case SqlDbType.UniqueIdentifier:
nullVal.SqlGuid = SqlGuid.Null;
break;
case SqlDbType.Bit:
nullVal.SetToNullOfType(SqlBuffer.StorageType.Boolean);
break;
case SqlDbType.TinyInt:
nullVal.SetToNullOfType(SqlBuffer.StorageType.Byte);
break;
case SqlDbType.SmallInt:
nullVal.SetToNullOfType(SqlBuffer.StorageType.Int16);
break;
case SqlDbType.Int:
nullVal.SetToNullOfType(SqlBuffer.StorageType.Int32);
break;
case SqlDbType.BigInt:
nullVal.SetToNullOfType(SqlBuffer.StorageType.Int64);
break;
case SqlDbType.Char:
case SqlDbType.VarChar:
case SqlDbType.NChar:
case SqlDbType.NVarChar:
case SqlDbType.Text:
case SqlDbType.NText:
nullVal.SetToNullOfType(SqlBuffer.StorageType.String);
break;
case SqlDbType.Decimal:
nullVal.SetToNullOfType(SqlBuffer.StorageType.Decimal);
break;
case SqlDbType.DateTime:
case SqlDbType.SmallDateTime:
nullVal.SetToNullOfType(SqlBuffer.StorageType.DateTime);
break;
case SqlDbType.Money:
case SqlDbType.SmallMoney:
nullVal.SetToNullOfType(SqlBuffer.StorageType.Money);
break;
case SqlDbType.Variant:
// DBNull.Value will have to work here
nullVal.SetToNullOfType(SqlBuffer.StorageType.Empty);
break;
case SqlDbType.Xml:
nullVal.SqlCachedBuffer = SqlCachedBuffer.Null;
break;
case SqlDbType.Date:
nullVal.SetToNullOfType(SqlBuffer.StorageType.Date);
break;
case SqlDbType.Time:
nullVal.SetToNullOfType(SqlBuffer.StorageType.Time);
break;
case SqlDbType.DateTime2:
nullVal.SetToNullOfType(SqlBuffer.StorageType.DateTime2);
break;
case SqlDbType.DateTimeOffset:
nullVal.SetToNullOfType(SqlBuffer.StorageType.DateTimeOffset);
break;
case SqlDbType.Timestamp:
// Dev10 Bug #479607 - this should have been the same as SqlDbType.Binary, but it's a rejected breaking change
// Dev10 Bug #752790 - don't assert when it does happen
break;
default:
Debug.Assert(false, "unknown null sqlType!" + md.type.ToString());
break;
}
return nullVal;
}
private static void GetNullOutputParameterSmi(SmiMetaData metaData, SqlBuffer targetBuffer, ref object result)
{
if (SqlDbType.Udt == metaData.SqlDbType)
{
result = NullUdtInstance(metaData);
}
else
{
SqlBuffer.StorageType storageType = __dbTypeToStorageType[(int) metaData.SqlDbType];
if (storageType == SqlBuffer.StorageType.Empty)
{
result = DBNull.Value;
}
else if (SqlBuffer.StorageType.SqlBinary == storageType)
{
targetBuffer.SqlBinary = SqlBinary.Null;
}
else if (SqlBuffer.StorageType.SqlGuid == storageType)
{
targetBuffer.SqlGuid = SqlGuid.Null;
}
else
{
targetBuffer.SetToNullOfType(storageType);
}
}
}
internal object GetNullSqlValue(SqlBuffer nullVal, SqlMetaDataPriv md)
{
switch (md.type)
{
case SqlDbType.BigInt:
nullVal.SetToNullOfType(SqlBuffer.StorageType.Int64);
return nullVal;
case SqlDbType.Binary:
case SqlDbType.Image:
case SqlDbType.VarBinary:
case SqlDbType.Udt:
nullVal.SqlBinary = SqlBinary.Null;
return nullVal;
case SqlDbType.Bit:
nullVal.SetToNullOfType(SqlBuffer.StorageType.Boolean);
return nullVal;
case SqlDbType.Char:
case SqlDbType.NChar:
case SqlDbType.NText:
case SqlDbType.NVarChar:
case SqlDbType.Text:
case SqlDbType.VarChar:
nullVal.SetToNullOfType(SqlBuffer.StorageType.String);
return nullVal;
case SqlDbType.DateTime:
case SqlDbType.SmallDateTime:
nullVal.SetToNullOfType(SqlBuffer.StorageType.DateTime);
return nullVal;
case SqlDbType.Decimal:
nullVal.SetToNullOfType(SqlBuffer.StorageType.Decimal);
return nullVal;
case SqlDbType.Float:
nullVal.SetToNullOfType(SqlBuffer.StorageType.Double);
return nullVal;
case SqlDbType.Int:
nullVal.SetToNullOfType(SqlBuffer.StorageType.Int32);
return nullVal;
case SqlDbType.Money:
case SqlDbType.SmallMoney:
nullVal.SetToNullOfType(SqlBuffer.StorageType.Money);
return nullVal;
case SqlDbType.Real:
nullVal.SetToNullOfType(SqlBuffer.StorageType.Single);
return nullVal;
case SqlDbType.UniqueIdentifier:
nullVal.SqlGuid = SqlGuid.Null;
return nullVal;
case SqlDbType.SmallInt:
nullVal.SetToNullOfType(SqlBuffer.StorageType.Int16);
return nullVal;
case SqlDbType.Timestamp:
case (SqlDbType.SmallInt | SqlDbType.Int):
case (SqlDbType.Text | SqlDbType.Int):
case (SqlDbType.Xml | SqlDbType.Bit):
case (SqlDbType.TinyInt | SqlDbType.Int):
case SqlDbType.Structured:
return nullVal;
case SqlDbType.TinyInt:
nullVal.SetToNullOfType(SqlBuffer.StorageType.Byte);
return nullVal;
case SqlDbType.Variant:
nullVal.SetToNullOfType(SqlBuffer.StorageType.Empty);
return nullVal;
case SqlDbType.Xml:
nullVal.SqlCachedBuffer = SqlCachedBuffer.Null;
return nullVal;
case SqlDbType.Date:
nullVal.SetToNullOfType(SqlBuffer.StorageType.Date);
return nullVal;
case SqlDbType.Time:
nullVal.SetToNullOfType(SqlBuffer.StorageType.Time);
return nullVal;
case SqlDbType.DateTime2:
nullVal.SetToNullOfType(SqlBuffer.StorageType.DateTime2);
return nullVal;
case SqlDbType.DateTimeOffset:
nullVal.SetToNullOfType(SqlBuffer.StorageType.DateTimeOffset);
return nullVal;
}
return nullVal;
}
