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- // sqlcols.cpp: implementation of the CColumns class
- //
- // This is a part of the Microsoft Foundation Classes C++ library.
- // Copyright (C) 1992-1995 Microsoft Corporation
- // All rights reserved.
- //
- // This source code is only intended as a supplement to the
- // Microsoft Foundation Classes Reference and related
- // electronic documentation provided with the library.
- // See these sources for detailed information regarding the
- // Microsoft Foundation Classes product.
-
-
- #include "stdafx.h"
- #include "columnst.h"
-
- /////////////////////////////////////////////////////////////////////////////
- // CColumns implementation
-
- IMPLEMENT_DYNAMIC(CColumns, CRecordset)
-
- CColumns::CColumns(CDatabase* pDatabase)
- : CRecordset(pDatabase)
- {
- //{{AFX_FIELD_INIT(CColumns)
- m_strQualifier = "";
- m_strOwner = "";
- m_strTableName = "";
- m_strColumnName = "";
- m_nDataType = 0;
- m_strTypeName = "";
- m_lPrecision = 0;
- m_lLength = 0;
- m_nScale = 0;
- m_nRadix = 0;
- m_nFields = 11;
- //}}AFX_FIELD_INIT
- m_strQualifierParam = "";
- m_strOwnerParam = "";
- m_strTableNameParam = "";
- m_strColumnNameParam = "";
- }
-
- BOOL CColumns::Open(UINT nOpenType /* = snapshot */,
- LPCSTR lpszSQL /* = NULL */, DWORD dwOptions /* = none */)
- {
- RETCODE nRetCode;
- ASSERT(lpszSQL == NULL);
-
- nOpenType; // not used in release build
- dwOptions;
- lpszSQL;
-
- // Allocation and opening of database not supported
- if (m_hstmt == SQL_NULL_HSTMT)
- {
- CString strDefaultConnect;
- TRY
- {
- if (m_pDatabase == NULL)
- {
- m_pDatabase = new CDatabase();
- m_bRecordsetDb = TRUE;
- }
-
- strDefaultConnect = GetDefaultConnect();
- // If not already opened, attempt to open
- if (!m_pDatabase->IsOpen() &&
- !m_pDatabase->Open("", FALSE, FALSE, strDefaultConnect))
- return FALSE;
-
- AFX_SQL_SYNC(::SQLAllocStmt(m_pDatabase->m_hdbc, &m_hstmt));
- if (!Check(nRetCode))
- ThrowDBException(SQL_INVALID_HANDLE);
- }
- CATCH_ALL(e)
- {
- #ifdef _DEBUG
- if (afxTraceFlags & 0x20)
- TRACE0("Error: CDatabase create for CRecordset failed\n");
- #endif // _DEBUG
- strDefaultConnect.Empty();
- if (m_bRecordsetDb)
- {
- delete m_pDatabase;
- m_pDatabase = NULL;
- }
- ASSERT(m_hstmt == SQL_NULL_HSTMT);
- THROW_LAST();
- }
- END_CATCH_ALL
- }
-
- TRY
- {
- // set any options, like timeouts, scrolling options
- OnSetOptions(m_hstmt);
-
- // call the ODBC catalog function with data member params
- RETCODE nRetCode;
- AFX_SQL_ASYNC(this, ::SQLColumns(m_hstmt,
- (m_strQualifierParam.IsEmpty()? (UCHAR FAR *)NULL: (UCHAR FAR *)(const char*)m_strQualifierParam), SQL_NTS,
- (m_strOwnerParam.IsEmpty()? (UCHAR FAR *)NULL: (UCHAR FAR *)(const char*)m_strOwnerParam), SQL_NTS,
- (m_strTableNameParam.IsEmpty()? (UCHAR FAR *)NULL: (UCHAR FAR *)(const char*)m_strTableNameParam), SQL_NTS,
- NULL, SQL_NTS));
- if (!Check(nRetCode))
- {
- AfxThrowDBException(nRetCode, m_pDatabase, m_hstmt);
- }
- // load first record
- MoveFirst();
- }
- CATCH_ALL(e)
- {
- Close();
- THROW_LAST();
- }
- END_CATCH_ALL
- return TRUE;
- }
-
- CString CColumns::GetDefaultConnect()
- {
- // this minimal connect string will cause ODBC login dialog to be brought up
- return "ODBC;";
- }
-
- CString CColumns::GetDefaultSQL()
- {
- // there is no default SQL - a direct ODBC call is made instead
- ASSERT(FALSE);
- return "!";
- }
-
- void CColumns::DoFieldExchange(CFieldExchange* pFX)
- {
- //{{AFX_FIELD_MAP(CColumns)
- pFX->SetFieldType(CFieldExchange::outputColumn);
- RFX_Text(pFX, "table_qualifier", m_strQualifier);
- RFX_Text(pFX, "table_owner", m_strOwner);
- RFX_Text(pFX, "table_name", m_strTableName);
- RFX_Text(pFX, "column_name", m_strColumnName);
- RFX_Int(pFX, "data_type", m_nDataType);
- RFX_Text(pFX, "type_name", m_strTypeName);
- RFX_Long(pFX, "precision", m_lPrecision);
- RFX_Long(pFX, "length", m_lLength);
- RFX_Int(pFX, "scale", m_nScale);
- RFX_Int(pFX, "radix", m_nRadix);
- RFX_Int(pFX, "nullable", m_nNullable);
- //}}AFX_FIELD_MAP
- }
-