| private MetaDataForSmi ( System.Data.SqlClient.ParameterPeekAheadValue &peekAhead ) : Microsoft.SqlServer.Server.SmiParameterMetaData | ||
| peekAhead | System.Data.SqlClient.ParameterPeekAheadValue | |
| Résultat | Microsoft.SqlServer.Server.SmiParameterMetaData | |
internal MSS.SmiParameterMetaData MetaDataForSmi(out ParameterPeekAheadValue peekAhead)
{
peekAhead = null;
MetaType mt = ValidateTypeLengths();
long actualLen = GetActualSize();
long maxLen = this.Size;
// GetActualSize returns bytes length, but smi expects char length for
// character types, so adjust
if (!mt.IsLong)
{
if (SqlDbType.NChar == mt.SqlDbType || SqlDbType.NVarChar == mt.SqlDbType)
{
actualLen = actualLen / sizeof(char);
}
if (actualLen > maxLen)
{
maxLen = actualLen;
}
}
// Determine maxLength for types that ValidateTypeLengths won't figure out
if (0 == maxLen)
{
if (SqlDbType.Binary == mt.SqlDbType || SqlDbType.VarBinary == mt.SqlDbType)
{
maxLen = MSS.SmiMetaData.MaxBinaryLength;
}
else if (SqlDbType.Char == mt.SqlDbType || SqlDbType.VarChar == mt.SqlDbType)
{
maxLen = MSS.SmiMetaData.MaxANSICharacters;
}
else if (SqlDbType.NChar == mt.SqlDbType || SqlDbType.NVarChar == mt.SqlDbType)
{
maxLen = MSS.SmiMetaData.MaxUnicodeCharacters;
}
}
else if ((maxLen > MSS.SmiMetaData.MaxBinaryLength && (SqlDbType.Binary == mt.SqlDbType || SqlDbType.VarBinary == mt.SqlDbType))
|| (maxLen > MSS.SmiMetaData.MaxANSICharacters && (SqlDbType.Char == mt.SqlDbType || SqlDbType.VarChar == mt.SqlDbType))
|| (maxLen > MSS.SmiMetaData.MaxUnicodeCharacters && (SqlDbType.NChar == mt.SqlDbType || SqlDbType.NVarChar == mt.SqlDbType)))
{
maxLen = -1;
}
int localeId = LocaleId;
if (0 == localeId && mt.IsCharType)
{
object value = GetCoercedValue();
if (value is SqlString && !((SqlString)value).IsNull)
{
localeId = ((SqlString)value).LCID;
}
else
{
localeId = Locale.GetCurrentCultureLcid();
}
}
SqlCompareOptions compareOpts = CompareInfo;
if (0 == compareOpts && mt.IsCharType)
{
object value = GetCoercedValue();
if (value is SqlString && !((SqlString)value).IsNull)
{
compareOpts = ((SqlString)value).SqlCompareOptions;
}
else
{
compareOpts = MSS.SmiMetaData.GetDefaultForType(mt.SqlDbType).CompareOptions;
}
}
string typeSpecificNamePart1 = null;
string typeSpecificNamePart2 = null;
string typeSpecificNamePart3 = null;
if (SqlDbType.Xml == mt.SqlDbType)
{
typeSpecificNamePart1 = this.XmlSchemaCollectionDatabase;
typeSpecificNamePart2 = this.XmlSchemaCollectionOwningSchema;
typeSpecificNamePart3 = this.XmlSchemaCollectionName;
}
else if (SqlDbType.Udt == mt.SqlDbType || (SqlDbType.Structured == mt.SqlDbType && !string.IsNullOrEmpty(this.TypeName)))
{
// Split the input name. The type name is specified as single 3 part name.
// NOTE: ParseTypeName throws if format is incorrect
String[] names;
if (SqlDbType.Udt == mt.SqlDbType)
{
throw ADP.DbTypeNotSupported(SqlDbType.Udt.ToString());
}
else
{
names = ParseTypeName(this.TypeName);
}
if (1 == names.Length)
{
typeSpecificNamePart3 = names[0];
}
else if (2 == names.Length)
{
typeSpecificNamePart2 = names[0];
typeSpecificNamePart3 = names[1];
}
else if (3 == names.Length)
{
typeSpecificNamePart1 = names[0];
typeSpecificNamePart2 = names[1];
typeSpecificNamePart3 = names[2];
}
else
{
throw ADP.ArgumentOutOfRange(nameof(names));
}
if ((!string.IsNullOrEmpty(typeSpecificNamePart1) && TdsEnums.MAX_SERVERNAME < typeSpecificNamePart1.Length)
|| (!string.IsNullOrEmpty(typeSpecificNamePart2) && TdsEnums.MAX_SERVERNAME < typeSpecificNamePart2.Length)
|| (!string.IsNullOrEmpty(typeSpecificNamePart3) && TdsEnums.MAX_SERVERNAME < typeSpecificNamePart3.Length))
{
throw ADP.ArgumentOutOfRange(nameof(names));
}
}
byte precision = GetActualPrecision();
byte scale = GetActualScale();
// precision for decimal types may still need adjustment.
if (SqlDbType.Decimal == mt.SqlDbType)
{
if (0 == precision)
{
precision = TdsEnums.DEFAULT_NUMERIC_PRECISION;
}
}
// Sub-field determination
List<SmiExtendedMetaData> fields = null;
MSS.SmiMetaDataPropertyCollection extendedProperties = null;
if (SqlDbType.Structured == mt.SqlDbType)
{
GetActualFieldsAndProperties(out fields, out extendedProperties, out peekAhead);
}
return new MSS.SmiParameterMetaData(mt.SqlDbType,
maxLen,
precision,
scale,
localeId,
compareOpts,
SqlDbType.Structured == mt.SqlDbType,
fields,
extendedProperties,
this.ParameterNameFixed,
typeSpecificNamePart1,
typeSpecificNamePart2,
typeSpecificNamePart3,
this.Direction);
}
private void WriteSmiParameter(SqlParameter param, int paramIndex, bool sendDefault, TdsParserStateObject stateObj)
{
//
// Determine Metadata
//
ParameterPeekAheadValue peekAhead;
MSS.SmiParameterMetaData metaData = param.MetaDataForSmi(out peekAhead);
if (!_isKatmai)
{
MetaType mt = MetaType.GetMetaTypeFromSqlDbType(metaData.SqlDbType, metaData.IsMultiValued);
throw ADP.VersionDoesNotSupportDataType(mt.TypeName);
}
//
// Determine value to send
//
object value;
MSS.ExtendedClrTypeCode typeCode;
// if we have an output or default param, set the value to null so we do not send it across to the server
if (sendDefault)
{
// Value for TVP default is empty list, not NULL
if (SqlDbType.Structured == metaData.SqlDbType && metaData.IsMultiValued)
{
value = s_tvpEmptyValue;
typeCode = MSS.ExtendedClrTypeCode.IEnumerableOfSqlDataRecord;
}
else
{
// Need to send null value for default
value = null;
typeCode = MSS.ExtendedClrTypeCode.DBNull;
}
}
else if (param.Direction == ParameterDirection.Output)
{
bool isCLRType = param.ParamaterIsSqlType; // We have to forward the TYPE info, we need to know what type we are returning. Once we null the paramater we will no longer be able to distinguish what type were seeing.
param.Value = null;
value = null;
typeCode = MSS.ExtendedClrTypeCode.DBNull;
param.ParamaterIsSqlType = isCLRType;
}
else
{
value = param.GetCoercedValue();
typeCode = MSS.MetaDataUtilsSmi.DetermineExtendedTypeCodeForUseWithSqlDbType(metaData.SqlDbType, metaData.IsMultiValued, value);
}
//
// Write parameter metadata
//
WriteSmiParameterMetaData(metaData, sendDefault, stateObj);
//
// Now write the value
//
TdsParameterSetter paramSetter = new TdsParameterSetter(stateObj, metaData);
MSS.ValueUtilsSmi.SetCompatibleValueV200(
new MSS.SmiEventSink_Default(), // TDS Errors/events dealt with at lower level for now, just need an object for processing
paramSetter,
0, // ordinal. TdsParameterSetter only handles one parameter at a time
metaData,
value,
typeCode,
param.Offset,
0 < param.Size ? param.Size : -1,
peekAhead);
}
