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//
// System.Data.Odbc.libodbc
//
// Authors:
// Brian Ritchie (brianlritchie@hotmail.com)
// Sureshkumar T (tsureshkumar@novell.com)
//
//
// Copyright (C) Brian Ritchie, 2002
//
//
//
// Copyright (C) 2004 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System.Data;
using System.Data.Common;
using System.Runtime.InteropServices;
namespace System.Data.Odbc
{
internal enum OdbcHandleType : short {
Env = 1,
Dbc = 2,
Stmt = 3,
Desc = 4
};
internal enum OdbcReturn : short {
Error = -1,
InvalidHandle = -2,
StillExecuting = 2,
NeedData = 99,
Success = 0,
SuccessWithInfo = 1,
NoData=100
}
internal enum OdbcEnv : ushort {
OdbcVersion = 200,
ConnectionPooling = 201,
CPMatch = 202
}
internal enum OdbcConnectionAttribute : int
{
AutoCommit=102,
TransactionIsolation=108,
CurrentCatalog=109
}
internal enum OdbcInfo : ushort
{
DataSourceName = 2,
DriverName = 6,
DriverVersion = 7,
DatabaseName = 16,
DbmsVersion = 18
}
internal enum OdbcInputOutputDirection : short
{
Input=1,
InputOutput=2,
ResultCol=3,
Output=4,
ReturnValue=5
}
internal enum OdbcLengthIndicator : short
{
NoTotal = -4,
NullData = -1
}
// Keep this sorted.
internal enum FieldIdentifier
{
AutoUniqueValue = 11, /* SQL_DESC_AUTO_UNIQUE_VALUE */
BaseColumnName = 22, /* SQL_DESC_BASE_COLUMN_NAME */
BaseTableName = 23, /* SQL_DESC_BASE_TABLE_NAME */
CaseSensitive = 12, /* SQL_DESC_CASE_SENSITIVE */
CatelogName = 17, /* SQL_DESC_CATALOG_NAME */
ConsiseType = 2, /* SQL_DESC_CONCISE_TYPE */
Count = 1001, /* SQL_DESC_COUNT */
DisplaySize = 6, /* SQL_DESC_DISPLAY_SIZE */
FixedPrecScale = 9, /* SQL_DESC_FIXED_PREC_SCALE */
Label = 18, /* SQL_DESC_LABEL */
Length = 1003, /* SQL_DESC_LENGTH */
LiteralPrefix = 27, /* SQL_DESC_LITERAL_PREFIX */
LiteralSuffix = 28, /* SQL_DESC_LITERAL_SUFFIX */
LocalTypeName = 29, /* SQL_DESC_LOCAL_TYPE_NAME */
Name = 1011, /* SQL_DESC_NAME */
Nullable = 1008, /* SQL_DESC_NULLABLE */
NumPrecRadix = 32, /* SQL_DESC_NUM_PREC_RADIX */
OctetLength = 1013, /* SQL_DESC_OCTET_LENGTH */
Precision = 1005, /* SQL_DESC_PRECISION */
Scale = 1006, /* SQL_DESC_SCALE */
SchemaName = 16, /* SQL_DESC_SCHEMA_NAME */
Searchable = 13, /* SQL_DESC_SEARCHABLE */
TableName = 15, /* SQL_DESC_TABLE_NAME */
Type = 1002, /* SQL_DESC_TYPE */
TypeName = 14, /* SQL_DESC_TYPE_NAME */
Unnamed = 1012, /* SQL_DESC_UNNAMED */
Unsigned = 8, /* SQL_DESC_UNSIGNED */
Updatable = 10 /* SQL_DESC_UPDATABLE */
}
[StructLayout(LayoutKind.Sequential)]
internal struct OdbcTimestamp
{
internal short year;
internal ushort month;
internal ushort day;
internal ushort hour;
internal ushort minute;
internal ushort second;
internal ulong fraction;
}
// sealed internal class libodbc
internal class libodbc
{
#region global constants
internal const int SQL_OV_ODBC2 = 2;
internal const int SQL_OV_ODBC3 = 3;
internal const string SQLSTATE_RIGHT_TRUNC = "01004";
internal const char C_NULL = '\0';
internal const short SQL_TRUE = 1;
internal const short SQL_FALSE = 0;
// SQLStatistics
internal const short SQL_INDEX_UNIQUE = 0;
internal const short SQL_INDEX_ALL = 1;
internal const short SQL_QUICK = 0;
internal const short SQL_ENSURE = 1;
// SQLColumnAttribute
internal const short SQL_NO_NULLS = 0;
internal const short SQL_NULLABLE = 1;
internal const short SQL_NULLABLE_UNKNOWN = 2;
internal const short SQL_ATTR_READONLY = 0;
internal const short SQL_ATTR_WRITE = 1;
internal const short SQL_ATTR_READWRITE_UNKNOWN = 2;
#endregion
internal static OdbcInputOutputDirection ConvertParameterDirection(
ParameterDirection dir)
{
switch (dir)
{
case ParameterDirection.Input:
return OdbcInputOutputDirection.Input;
case ParameterDirection.InputOutput:
return OdbcInputOutputDirection.InputOutput;
case ParameterDirection.Output:
return OdbcInputOutputDirection.Output;
case ParameterDirection.ReturnValue:
return OdbcInputOutputDirection.ReturnValue;
default:
return OdbcInputOutputDirection.Input;
}
}
[DllImport("odbc32.dll")]
internal static extern OdbcReturn SQLAllocHandle (OdbcHandleType HandleType, IntPtr InputHandle, ref IntPtr OutputHandlePtr);
[DllImport("odbc32.dll")]
internal static extern OdbcReturn SQLSetEnvAttr (IntPtr EnvHandle, OdbcEnv Attribute, IntPtr Value, int StringLength);
[DllImport("odbc32.dll")]
internal static extern OdbcReturn SQLConnect (IntPtr ConnectionHandle, string ServerName, short NameLength1, string UserName, short NameLength2, string Authentication, short NameLength3);
[DllImport("odbc32.dll")]
internal static extern OdbcReturn SQLDriverConnect(IntPtr ConnectionHandle, IntPtr WindowHandle, string InConnectionString, short StringLength1, string OutConnectionString, short BufferLength, ref short StringLength2Ptr, ushort DriverCompletion);
[DllImport("odbc32.dll")]
internal static extern OdbcReturn SQLExecDirect (IntPtr StatementHandle, string StatementText, int TextLength);
[DllImport("odbc32.dll")]
internal static extern OdbcReturn SQLRowCount (IntPtr StatementHandle, ref int RowCount);
[DllImport("odbc32.dll")]
internal static extern OdbcReturn SQLNumResultCols (IntPtr StatementHandle, ref short ColumnCount);
[DllImport("odbc32.dll")]
internal static extern OdbcReturn SQLFetch (IntPtr StatementHandle);
[DllImport("odbc32.dll")]
internal static extern OdbcReturn SQLGetData (IntPtr StatementHandle, ushort ColumnNumber, SQL_C_TYPE TargetType, ref bool TargetPtr, int BufferLen, ref int Len);
[DllImport("odbc32.dll")]
internal static extern OdbcReturn SQLGetData (IntPtr StatementHandle, ushort ColumnNumber, SQL_C_TYPE TargetType, ref double TargetPtr, int BufferLen, ref int Len);
[DllImport("odbc32.dll")]
internal static extern OdbcReturn SQLGetData (IntPtr StatementHandle, ushort ColumnNumber, SQL_C_TYPE TargetType, ref long TargetPtr, int BufferLen, ref int Len);
[DllImport("odbc32.dll")]
internal static extern OdbcReturn SQLGetData (IntPtr StatementHandle, ushort ColumnNumber, SQL_C_TYPE TargetType, ref short TargetPtr, int BufferLen, ref int Len);
[DllImport("odbc32.dll")]
internal static extern OdbcReturn SQLGetData (IntPtr StatementHandle, ushort ColumnNumber, SQL_C_TYPE TargetType, ref float TargetPtr, int BufferLen, ref int Len);
[DllImport("odbc32.dll")]
internal static extern OdbcReturn SQLGetData (IntPtr StatementHandle, ushort ColumnNumber, SQL_C_TYPE TargetType, ref OdbcTimestamp TargetPtr, int BufferLen, ref int Len);
[DllImport("odbc32.dll")]
internal static extern OdbcReturn SQLGetData (IntPtr StatementHandle, ushort ColumnNumber, SQL_C_TYPE TargetType, ref int TargetPtr, int BufferLen, ref int Len);
[DllImport("odbc32.dll")]
internal static extern OdbcReturn SQLGetData (IntPtr StatementHandle, ushort ColumnNumber, SQL_C_TYPE TargetType, byte[] TargetPtr, int BufferLen, ref int Len);
[DllImport("odbc32.dll")]
internal static extern OdbcReturn SQLDescribeCol(IntPtr StatementHandle, ushort ColumnNumber, byte[] ColumnName, short BufferLength, ref short NameLength, ref short DataType, ref uint ColumnSize, ref short DecimalDigits, ref short Nullable);
[DllImport("odbc32.dll")]
internal static extern OdbcReturn SQLFreeHandle(ushort HandleType, IntPtr SqlHandle);
[DllImport("odbc32.dll")]
internal static extern OdbcReturn SQLDisconnect(IntPtr ConnectionHandle);
[DllImport("odbc32.dll")]
internal static extern OdbcReturn SQLPrepare(IntPtr StatementHandle, string Statement, int TextLength);
[DllImport("odbc32.dll")]
internal static extern OdbcReturn SQLExecute(IntPtr StatementHandle);
[DllImport("odbc32.dll")]
internal static extern OdbcReturn SQLSetConnectAttr(IntPtr ConnectionHandle, OdbcConnectionAttribute Attribute, IntPtr Value, int Length);
[DllImport("odbc32.dll")]
internal static extern OdbcReturn SQLEndTran(int HandleType, IntPtr Handle, short CompletionType);
[DllImport("odbc32.dll")]
internal static extern OdbcReturn SQLBindParameter(IntPtr StatementHandle, ushort ParamNum,
short InputOutputType, SQL_C_TYPE ValueType, SQL_TYPE ParamType, uint ColSize,
short DecimalDigits, IntPtr ParamValue, int BufLen, IntPtr StrLen);
[DllImport("odbc32.dll")]
internal static extern OdbcReturn SQLCancel(IntPtr StatementHandle);
[DllImport("odbc32.dll")]
internal static extern OdbcReturn SQLCloseCursor(IntPtr StatementHandle);
[DllImport("odbc32.dll")]
internal static extern OdbcReturn SQLError(IntPtr EnvironmentHandle,
IntPtr ConnectionHandle, IntPtr StatementHandle,
byte[] Sqlstate, ref int NativeError,
byte[] MessageText, short BufferLength,
ref short TextLength);
[DllImport("odbc32.dll")]
internal static extern OdbcReturn SQLGetStmtAttr(IntPtr StatementHandle,
int Attribute, ref IntPtr Value, int BufLen, int StrLen);
[DllImport("odbc32.dll")]
internal static extern OdbcReturn SQLSetDescField(IntPtr DescriptorHandle,
short RecNumber, short FieldIdentifier, byte[] Value, int BufLen);
[DllImport("odbc32.dll")]
internal static extern OdbcReturn SQLGetDiagRec (OdbcHandleType HandleType,
IntPtr Handle, ushort RecordNumber,
byte [] Sqlstate, ref int NativeError,
byte [] MessageText, short BufferLength,
ref short TextLength);
[DllImport ("odbc32.dll")]
internal static extern OdbcReturn SQLMoreResults (IntPtr Handle);
internal enum SQLFreeStmtOptions : short
{
Close = 0,
Drop,
Unbind,
ResetParams
}
[DllImport ("odbc32.dll")]
internal static extern OdbcReturn SQLFreeStmt (IntPtr Handle, SQLFreeStmtOptions option);
[DllImport ("odbc32.dll")]
internal static extern OdbcReturn SQLGetInfo (IntPtr connHandle,
OdbcInfo info,
byte [] buffer,
short buffLength,
ref short remainingStrLen);
[DllImport ("odbc32.dll")]
internal static extern OdbcReturn SQLColAttribute (IntPtr StmtHandle,
int column,
FieldIdentifier fieldId,
byte [] charAttributePtr,
int bufferLength,
ref int strLengthPtr,
ref int numericAttributePtr
);
[DllImport ("odbc32.dll")]
internal static extern OdbcReturn SQLPrimaryKeys (IntPtr StmtHandle,
string catalog,
int catalogLength,
string schema,
int schemaLength,
string tableName,
int tableLength
);
[DllImport ("odbc32.dll")]
internal static extern OdbcReturn SQLStatistics (IntPtr StmtHandle,
string catalog,
int catalogLength,
string schema,
int schemaLength,
string tableName,
int tableLength,
short unique,
short Reserved
);
[DllImport ("odbc32.dll")]
internal static extern OdbcReturn SQLBindCol (IntPtr StmtHandle,
int column,
SQL_C_TYPE targetType,
byte [] buffer,
int bufferLength,
ref int indicator
);
[DllImport ("odbc32.dll")]
internal static extern OdbcReturn SQLBindCol (IntPtr StmtHandle,
int column,
SQL_C_TYPE targetType,
ref short value,
int bufferLength,
ref int indicator
);
}
}
|
