1 | ' odbc.sbp
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2 |
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3 | #require <api_sqlext.sbp>
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4 |
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5 | '===========================================================
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6 | ' IOdbcConnection インターフェイス
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7 |
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8 | Dim IID_IOdbcConnection = [&HE0FC6F3C,&HDD4C,&H40f6,[&H82,&H8F,&H42,&H90,&H67,&H27,&H9C,&HDC]] As GUID
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9 | Interface IOdbcConnection
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10 | Inherits IUnknown
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11 | Function Connect(lpszDataSource As LPSTR) As SQLRETURN
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12 | Function Disconnect() As SQLRETURN
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13 | Function CreateCommand() As *COdbcCommand
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14 | End Interface
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15 |
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16 | Function OdbcConnection_CreateInstance() As *IOdbcConnection
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17 | Dim pobj_OdbcConnection As *COdbcConnection
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18 | pobj_OdbcConnection=New COdbcConnection()
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19 |
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20 | pobj_OdbcConnection->QueryInterface(IID_IOdbcConnection,VarPtr(OdbcConnection_CreateInstance))
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21 | End Function
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22 |
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23 | ' ここまで
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24 | '===========================================================
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25 |
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26 |
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27 |
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28 | Class COdbcConnection
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29 | m_ref As Long '参照カウンタ
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30 |
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31 | hEnv As SQLHENV '環境ハンドル
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32 | hDbc As SQLHDBC '接続ハンドル
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33 |
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34 | Public
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35 | Sub COdbcConnection()
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36 | '環境ハンドルを取得
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37 | SQLAllocHandle( SQL_HANDLE_ENV, 0 , hEnv )
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38 | SQLSetEnvAttr ( hEnv, SQL_ATTR_ODBC_VERSION, SQL_OV_ODBC3 As SQLPOINTER, 0 )
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39 |
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40 | '接続ハンドルを取得
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41 | SQLAllocHandle( SQL_HANDLE_DBC, hEnv, hDbc )
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42 | End Sub
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43 | Sub ~COdbcConnection()
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44 | '切断
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45 | Disconnect()
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46 |
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47 | '接続ハンドルを解放
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48 | SQLFreeHandle( SQL_HANDLE_DBC, hDbc )
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49 |
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50 | '環境ハンドルを解放
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51 | SQLFreeHandle( SQL_HANDLE_ENV, hEnv )
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52 | End Sub
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53 |
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54 |
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55 | Function GetEnvHandle() As SQLHENV
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56 | GetEnvHandle = hEnv
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57 | End Function
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58 | Function GetDbcHandle() As SQLHDBC
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59 | GetDbcHandle = hDbc
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60 | End Function
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61 |
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62 |
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63 |
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64 | '-------------------------------------------------------
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65 | ' COMインターフェイス用IUnknownメソッド
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66 |
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67 | Virtual Function QueryInterface(ByRef riid As IID, ppvObj As *VoidPtr) As HRESULT
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68 | If IsEqualIID(riid,IID_IOdbcConnection)<>0 or IsEqualIID(riid,IID_IUnknown)<>0 Then
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69 | Set_LONG_PTR(ppvObj,VarPtr(This) As LONG_PTR)
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70 | AddRef()
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71 | QueryInterface=S_OK
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72 | Else
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73 | Set_LONG_PTR(ppvObj,0)
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74 | QueryInterface=E_NOINTERFACE
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75 | End If
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76 | End Function
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77 |
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78 | Virtual Function AddRef() As DWord
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79 | m_ref++
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80 | AddRef=m_ref
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81 | End Function
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82 | Virtual Function Release() As DWord
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83 | m_ref--
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84 | If m_ref=0 Then
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85 | Delete VarPtr(This)
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86 | End If
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87 | Release=m_ref
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88 | End Function
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89 |
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90 | ' ここまで
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91 | '-------------------------------------------------------
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92 |
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93 |
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94 | '-------------------------------------------------------
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95 | ' 接続を確立
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96 | '-------------------------------------------------------
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97 | Virtual Function Connect(lpszDataSource As LPSTR) As SQLRETURN
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98 | Dim szConnStrOut[ELM(1024)] As Byte
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99 | Dim cbConnStrOut As SQLSMALLINT
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100 |
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101 | 'データベースへ接続する
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102 | Dim ret As SQLRETURN
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103 | ret=SQLDriverConnect(hDbc,
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104 | 0,
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105 | lpszDataSource,
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106 | SQL_NTS,
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107 | szConnStrOut,
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108 | 1024,
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109 | cbConnStrOut,
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110 | SQL_DRIVER_COMPLETE_REQUIRED)
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111 |
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112 | Connect=ret
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113 | End Function
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114 |
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115 |
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116 | '-------------------------------------------------------
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117 | ' 切断
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118 | '-------------------------------------------------------
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119 | Virtual Function Disconnect() As SQLRETURN
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120 | Disconnect = SQLDisconnect(hDbc)
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121 | End Function
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122 |
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123 |
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124 | '--------------------------------
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125 | ' コマンド インスタンスを生成
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126 | '--------------------------------
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127 |
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128 | Virtual Function CreateCommand() As *COdbcCommand
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129 | Dim pobj_Command As *COdbcCommand
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130 | pobj_Command=New COdbcCommand(VarPtr(This))
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131 |
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132 | Return pobj_Command
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133 | End Function
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134 |
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135 | /*
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136 | Function ExecDirect(lpszSQL As LPSTR) As SQLRETURN
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137 | '前回のステートメントハンドルを解放
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138 | StmtFreeHandle()
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139 |
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140 | 'ステートメントハンドルを取得する
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141 | SQLAllocHandle( SQL_HANDLE_STMT, hDbc, hStmt )
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142 |
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143 | 'SQL文を発行
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144 | ExecDirect = SQLExecDirect( hStmt, lpszSQL, SQL_NTS )
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145 | End Function
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146 |
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147 | Function Prepare(lpszSQL As LPSTR) As SQLRETURN
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148 | '前回のステートメントハンドルを解放
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149 | StmtFreeHandle()
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150 |
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151 | 'ステートメントハンドルを取得する
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152 | SQLAllocHandle( SQL_HANDLE_STMT, hDbc, hStmt )
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153 |
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154 | Prepare = SQLPrepare( hStmt, lpszSQL, SQL_NTS ) 'SQL文を設定する
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155 | End Function
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156 |
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157 | Function Execute() As SQLRETURN
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158 | Execute = SQLExecute( hStmt )
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159 | End Function*/
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160 | End Class
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161 |
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162 |
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163 |
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164 | Class COdbcCommand
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165 | Public
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166 | pobj_Connection As *COdbcConnection
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167 | hStmt As SQLHSTMT
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168 | CommandText As String
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169 |
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170 | Sub COdbcCommand(pobj_Connection As *COdbcConnection)
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171 | This.pobj_Connection=pobj_Connection
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172 | End Sub
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173 | Sub ~COdbcCommand()
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174 | If hStmt Then
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175 | SQLFreeHandle( SQL_HANDLE_STMT, hStmt )
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176 | hStmt=0
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177 | End If
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178 | End Sub
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179 |
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180 |
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181 | Function ExecuteReader() As *COdbcDataReader
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182 | 'DataReaderを構築
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183 | Dim pobj_DataReader As *COdbcDataReader
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184 | pobj_DataReader=New COdbcDataReader(VarPtr(This))
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185 |
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186 | Return pobj_DataReader
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187 | End Function
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188 |
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189 | Function Release() As DWord
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190 | Delete VarPtr(This)
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191 | End Function
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192 | End Class
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193 |
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194 |
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195 | Class COdbcData
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196 | Public
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197 | lpszName As LPSTR
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198 | iType As SQLSMALLINT
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199 | iSize As SQLINTEGER
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200 |
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201 | lpszValue As LPSTR
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202 |
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203 | Sub COdbcData(lpszName As LPSTR, iType As SQLSMALLINT, iSize As SQLINTEGER)
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204 | This.lpszName=malloc(lstrlen(lpszName)+1)
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205 | lstrcpy(This.lpszName,lpszName)
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206 |
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207 | This.iType=iType
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208 |
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209 | This.iSize=iSize
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210 |
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211 | lpszValue=malloc(iSize+1)
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212 | End Sub
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213 | Sub ~COdbcData()
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214 | free(lpszName)
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215 | lpszName=0
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216 |
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217 | free(lpszValue)
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218 | lpszValue=0
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219 | End Sub
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220 | End Class
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221 |
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222 |
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223 | Class COdbcDataReader
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224 | pobj_Command As *COdbcCommand
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225 |
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226 | Item As **COdbcData
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227 | iColNum As SQLSMALLINT
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228 |
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229 | bFirstRead As BOOL
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230 |
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231 | hStmt As SQLHSTMT
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232 |
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233 | Public
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234 |
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235 | Sub COdbcDataReader(pobj_Command As *COdbcCommand)
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236 | This.pobj_Command=pobj_Command
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237 |
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238 |
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239 | 'ステートメントハンドルを取得する
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240 | SQLAllocHandle( SQL_HANDLE_STMT,
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241 | pobj_Command->pobj_Connection->GetDbcHandle(),
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242 | hStmt )
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243 |
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244 | 'SQL文を発行
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245 | SQLExecDirect( hStmt, pobj_Command->CommandText, SQL_NTS )
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246 |
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247 |
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248 | '列数を取得
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249 | SQLNumResultCols(hStmt, iColNum)
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250 |
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251 | '列データ格納領域を確保
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252 | Item=malloc(iColNum*SizeOf(*COdbcData))
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253 |
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254 | Dim i As SQLSMALLINT
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255 | Dim szColName[255] As Byte
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256 | Dim acc_bytes As SQLSMALLINT
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257 | Dim iType As SQLSMALLINT, iSize As SQLINTEGER, scale As SQLSMALLINT, nullable As SQLSMALLINT
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258 | Dim displaysize As SQLINTEGER
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259 | For i=0 To ELM(iColNum)
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260 | '列属性を取得
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261 | SQLDescribeCol(hStmt,
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262 | i+1,
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263 | szColName,255,acc_bytes,
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264 | iType,
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265 | iSize,
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266 | scale,
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267 | nullable)
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268 |
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269 | '文字列に換算したときの長さを取得
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270 | SQLColAttributes (hStmt,
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271 | i+1, SQL_COLUMN_DISPLAY_SIZE, NULL, 0,
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272 | ByVal NULL, displaysize)
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273 |
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274 | If displaysize<lstrlen(szColName) Then
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275 | iSize=lstrlen(szColName)+1
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276 | Else
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277 | iSize=displaysize+1
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278 | End If
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279 |
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280 | '単一データを生成
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281 | Item[i]=New COdbcData(szColName,iType,iSize)
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282 |
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283 | 'バインド
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284 | Dim idummy As SQLLEN
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285 | SQLBindCol(hStmt, i+1, SQL_CHAR, ByVal Item[i]->lpszValue, iSize, idummy)
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286 | Next
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287 |
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288 | bFirstRead=1
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289 | End Sub
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290 | Sub ~COdbcDataReader()
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291 | Dim i As Long
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292 | For i=0 To ELM(iColNum)
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293 | Delete Item[i]
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294 | Next
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295 | free(Item)
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296 | Item=0
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297 |
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298 | If hStmt Then
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299 | SQLFreeHandle( SQL_HANDLE_STMT, hStmt )
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300 | hStmt=0
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301 | End If
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302 | End Sub
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303 |
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304 | Function GetFieldType(i As Long) As SQLSMALLINT
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305 | If i>=iColNum Then Return 0
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306 | Return Item[i]->iType
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307 | End Function
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308 |
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309 | Function GetName(i As Long) As LPSTR
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310 | If i>=iColNum Then Return 0
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311 | Return Item[i]->lpszName
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312 | End Function
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313 |
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314 | Function GetStrPtr(i As Long) As LPSTR
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315 | If i>=iColNum Then Return 0
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316 | Return Item[i]->lpszValue
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317 | End Function
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318 |
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319 | Function Read() As BOOL
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320 | Dim ret As SQLRETURN
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321 | If bFirstRead Then
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322 | '先頭行へ移動する
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323 | SQLFetchScroll( hStmt, SQL_FETCH_FIRST, 0 )
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324 |
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325 | ret = SQLFetch( hStmt )
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326 | If (ret = SQL_NO_DATA) Then Return 0
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327 |
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328 | bFirstRead=0
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329 | Else
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330 | '次の行へ移動する
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331 | ret = SQLFetchScroll( hStmt, SQL_FETCH_NEXT, 0 )
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332 | If (ret = SQL_NO_DATA) Then Return 0
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333 | End If
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334 |
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335 | Return 1
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336 | End Function
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337 |
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338 | Virtual Function Release() As DWord
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339 | Delete VarPtr(This)
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340 | End Function
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341 | End Class
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