SAP DB:ODBC Guida di Installazione Pagina 169
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8. Data Types supported by mxODBC
8.4 Python Type Input Binding
The following mappings are used for input variables in Python type input binding
mode -
cursor.bindmethod (inherited from connection.bindmethod) set to
BIND_USING_PYTHONTYPE. The table shows how the different Python types are
converted to SQL types.
Python Type SQL Type Comments
String SQL.VARCHAR,
SQL.LONGVARCHAR,
SQL.VARBINARY,
SQL.LONGVARBINARY
(char *)
The conversion truncates the string at the SQL
field length. If the string contains binary data,
SQL.VARBINARY is used for passing the data to
the ODBC driver/manager.
The long variants are used for strings longer
than 256 characters.
Unicode SQL.WVARCHAR,
SQL.WLONGVARCHAR
(wchar_t *)
The conversion truncates the string at the SQL
field length. Note that not all ODBC
drivers/managers support Unicode data at C
level.
This binding is used for all cursors which do
not have the
.stringformat attribute set
to
EIGHTBIT_STRINGFORMAT or
UNICODE_STRINGFORMAT.
In
EIGHTBIT_STRINGFORMAT mode
(default) and
UNICODE_STRINGFORMAT
mode, Unicode objects are converted to a 8-bit
strings first and then passed to the ODBC
driver/manager.
The long variant is used for Unicode data
longer than 256 code points.
buffer or
memoryview
SQL.VARBINARY,
SQL.LONGVARBINARY
(char *)
The conversion truncates the string at the SQL
field length. The string may contain binary
data.
If the ODBC driver/manager doesn't support
processing binary data using strings, wrap the
data object using Python buffers (via the
buffer() constructor) or Python memory
views (via the
memoryview()constructor)
to have mxODBC use a binary SQL type for
interfacing to the driver/manager. The Oracle
ODBC drivers usually need this.
The long variant is used for binary data longer
than 256 bytes.
Integer SQL.SLONG Conversion from the signed long to the SQL
column type is left to the ODBC
147
- ODBC Database Interface 1
- Contents 3
- 1.2 Features 24
- 1.3 Requirements 26
- Mac OS X 27
- 2. Installation 28
- Operating System Platform 29
- Python Build Version 29
- 2.2.1 Prerequisites 30
- 2.2.2 Before You Start 30
- License Files 31
- Step 1 31
- 2.2.4 Uninstall 32
- 2.3.2 Before You Start 33
- Step 2 34
- Step 3 35
- Step 4 35
- 2.4.1 Before You Start 36
- 2.3.4 Uninstall 36
- 2.4.3 Uninstall 38
- Manual Uninstall 39
- 3.1 ODBC Application Stack 40
- [Microsoft][ODBC Driver 42
- Windows Registry Keys 43
- 3.2.6 DSN-less Connections 45
- [ODBC Data Sources] 49
- [ODBC Drivers] 50
- ODBCINI 50
- ODBCINSTINI 50
- 3.3.7 DSN-less Connections 52
- DNS-less Connection String 53
- 4.1 MS SQL Server 54
- Driver Limitations 58
- [MONET] 60
- 4.1.2 General Notes 61
- Access Violations 63
- Kerberos on Linux 64
- 4.2 MS Access Database 65
- 4.3 Oracle 65
- Driver Notes 66
- 4.4 IBM DB2 68
- 4.4.2 General Notes 69
- Linker Paths 70
- 4.5 Sybase ASE 71
- 4.6 PostgreSQL 73
- 4.7 MySQL 75
- .rownumber to the 76
- .rownumber 76
- 4.8 SAP MaxDB / SAPDB 77
- 4.9 Teradata 78
- ORDER BY clause to 80
- 4.10 Netezza 81
- Netezza and Unicode 82
- 4.11 Other Databases 83
- 5. mxODBC Overview 85
- 5.1.2 Extensions 86
- 5.3 Supported ODBC Versions 87
- 5.5 Transaction Support 88
- 5.5.2 Manual Commit 89
- 5.6 Stored Procedures 90
- Methods 91
- parametertypes Parameter 93
- 5.7 Introspection 98
- 5.8 ODBC Cursor Types 100
- 5.8.2 Default Cursor Type 101
- MS SQL Server 102
- Oracle 102
- Factory Functions 103
- Predefined Row Factories 105
- 5.10 mxODBC Subpackages 107
- 6.2 Connection Type Object 109
- 6.1 Subpackage Support 109
- 6.6 Unicode/ANSI Connections 113
- # string 114
- 7. mxODBC Cursor Objects 124
- 7.2 Subpackage Support 125
- 7.4 Cursor Type Object 125
- 7.6 Cursor Object Methods 126
- 7.6.1 Catalog Methods 135
- Common Interface 136
- Result Set Layouts 136
- Search Pattern Parameters 136
- Unicode 137
- Available Catalog Methods 137
- SQLBindCol() 138
- SQLGetData() and 138
- 7. mxODBC Cursor Objects 139
- .gettypeinfo(sqltype) 142
- 7.7 Cursor Object Attributes 156
- Per-Statement Binding Mode 164
- 8.3 SQL Type Input Binding 165
- UNICODE_STRINGFORMAT 166
- None singleton is 168
- 8.5 Output Conversions 171
- EIGHTBIT_STRINGFORMAT 172
- 8.7 Auto-Conversions 175
- 8.9 Additional Comments 177
- Handling 180
- 10.2 SQL Error Mappings 182
- 10.4 Error Handlers 183
- 10.4.2 Examples 184
- 10.5 Warning Classes 185
- 10.6 Database Warnings 185
- 11. mxODBC Functions 188
- 11.2 mx.ODBC Functions 189
- Classes 193
- Functions 193
- Driver Manager 195
- 14.4 mx.ODBC.iODBC 197
- Manager 197
- 14.5.1 Notes 199
- 64-bit Platforms 200
- 14.7 ODBC Driver Subpackages 202
- Running mxODBC with mod_wsgi 204
- Freezing mxODBC using py2exe 205
- 16. Examples 207
- 18. mxODBC Package Structure 210
- 19.1.1 211
- Windows ODBC Manager 211
- 19.1.2 iODBC Driver Manager 212
- 20. History & Changes 214
- 21. Copyright & License 215
- Version 1.3.0 216
- 1. Introduction 216
- 2. Terms and Definitions 216
- 3. License Grant 217
- 4. Authorizations 217
- 5. Modifications 218
- 8. NO WARRANTY 218
- 9. LIMITATION OF LIABILITY 218
- 10. Termination 219
- 11. Indemnification 219
- 12. Third Party Rights 219
- 13. High Risk Activities 219
- 14. General 220
- 15. Agreement 220
- 1 CPU License (Example) 221
- 1. License Grant 221
- 2. Covered Software 221
- 3. Authorizations 221
- 4. Proof 222
- 7.2 Redistribution 224
- 8. Proof 224
- 21. Copyright & License 225
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