|
| 1 | +# API 参考 |
| 2 | + |
| 3 | +本页根据扩展源码 `src/native/py_Dameng.c`、`src/native/Connection.c`、`src/native/Cursor.c` 汇总公开接口。 |
| 4 | + |
| 5 | +## 模块级对象 |
| 6 | + |
| 7 | +### DB-API 元信息 |
| 8 | + |
| 9 | +- `dmPython.apilevel = "2.0"` |
| 10 | +- `dmPython.threadsafety = 1` |
| 11 | +- `dmPython.paramstyle = "qmark"` |
| 12 | +- `dmPython.version` |
| 13 | +- `dmPython.buildtime` |
| 14 | + |
| 15 | +### 连接入口 |
| 16 | + |
| 17 | +- `dmPython.connect(...)` |
| 18 | +- `dmPython.Connect(...)` |
| 19 | + |
| 20 | +两者均为 `Connection` 类型构造入口。 |
| 21 | + |
| 22 | +### `connect()` 参数 |
| 23 | + |
| 24 | +```python |
| 25 | +dmPython.connect( |
| 26 | + user=None, |
| 27 | + password=None, |
| 28 | + dsn=None, |
| 29 | + host=None, |
| 30 | + server=None, |
| 31 | + port=None, |
| 32 | + access_mode=None, |
| 33 | + autoCommit=None, |
| 34 | + connection_timeout=None, |
| 35 | + login_timeout=None, |
| 36 | + txn_isolation=None, |
| 37 | + app_name=None, |
| 38 | + compress_msg=None, |
| 39 | + use_stmt_pool=None, |
| 40 | + ssl_path=None, |
| 41 | + ssl_pwd=None, |
| 42 | + mpp_login=None, |
| 43 | + ukey_name=None, |
| 44 | + ukey_pin=None, |
| 45 | + rwseparate=None, |
| 46 | + rwseparate_percent=None, |
| 47 | + cursor_rollback_behavior=None, |
| 48 | + lang_id=None, |
| 49 | + local_code=None, |
| 50 | + cursorclass=None, |
| 51 | + schema=None, |
| 52 | + shake_crypto=None, |
| 53 | + catalog=None, |
| 54 | + dmsvc_path=None, |
| 55 | + parse_type=None, |
| 56 | +) |
| 57 | +``` |
| 58 | + |
| 59 | +说明: |
| 60 | + |
| 61 | +- `host` 与 `server` 互斥(只允许设置一个)。 |
| 62 | +- `user` 支持 `user/password@server:port[/schema][?catalog=...]` 形式。 |
| 63 | +- 常量参数建议使用模块常量(如 `DSQL_AUTOCOMMIT_ON`、`ISO_LEVEL_READ_COMMITTED`)。 |
| 64 | + |
| 65 | +### 模块函数 |
| 66 | + |
| 67 | +- `DateFromTicks(ticks)` |
| 68 | +- `TimeFromTicks(ticks)` |
| 69 | +- `TimestampFromTicks(ticks)` |
| 70 | +- `StringFromBytes(bs)` |
| 71 | + |
| 72 | +### 日期时间类型别名 |
| 73 | + |
| 74 | +- `Date` |
| 75 | +- `Time` |
| 76 | +- `Timestamp` |
| 77 | +- `DATETIME` |
| 78 | + |
| 79 | +### 游标类型常量 |
| 80 | + |
| 81 | +- `TupleCursor` |
| 82 | +- `DictCursor` |
| 83 | + |
| 84 | +用于 `connect(cursorclass=...)`。 |
| 85 | + |
| 86 | +## Connection |
| 87 | + |
| 88 | +### 方法 |
| 89 | + |
| 90 | +- `cursor()` |
| 91 | +- `commit()` |
| 92 | +- `rollback()` |
| 93 | +- `close()` |
| 94 | +- `disconnect()`(`close()` 别名) |
| 95 | +- `debug(debug_type=dmPython.DEBUG_OPEN)` |
| 96 | +- `shutdown(shutdown_type=dmPython.SHUTDOWN_DEFAULT)` |
| 97 | +- `explain(statement)` |
| 98 | +- `ping(reconnect=0)` |
| 99 | +- `__enter__()` |
| 100 | +- `__exit__(exc_type, exc_value, exc_traceback)` |
| 101 | + |
| 102 | +### 成员属性(只读) |
| 103 | + |
| 104 | +- `dsn` |
| 105 | +- `server_status` |
| 106 | +- `warning` |
| 107 | + |
| 108 | +### 计算属性(含可写项) |
| 109 | + |
| 110 | +可读写: |
| 111 | + |
| 112 | +- `access_mode` |
| 113 | +- `async_enable` |
| 114 | +- `auto_ipd` |
| 115 | +- `local_code` |
| 116 | +- `lang_id` |
| 117 | +- `app_name` |
| 118 | +- `txn_isolation` |
| 119 | +- `compress_msg` |
| 120 | +- `rwseparate` |
| 121 | +- `rwseparate_percent` |
| 122 | +- `use_stmt_pool` |
| 123 | +- `ssl_path` |
| 124 | +- `mpp_login` |
| 125 | +- `autoCommit` |
| 126 | +- `autocommit` |
| 127 | +- `connection_dead` |
| 128 | +- `connection_timeout` |
| 129 | +- `login_timeout` |
| 130 | +- `packet_size` |
| 131 | +- `port` |
| 132 | + |
| 133 | +只读: |
| 134 | + |
| 135 | +- `server_code` |
| 136 | +- `current_schema` |
| 137 | +- `str_case_sensitive` |
| 138 | +- `max_row_size` |
| 139 | +- `current_catalog` |
| 140 | +- `trx_state` |
| 141 | +- `server_version` |
| 142 | +- `cursor_rollback_behavior` |
| 143 | +- `user` |
| 144 | +- `server` |
| 145 | +- `inst_name` |
| 146 | +- `version` |
| 147 | +- `max_identifier_length` |
| 148 | +- `outputtypehandler` |
| 149 | +- `stmtcachesize` |
| 150 | + |
| 151 | +以上属性多数存在同名 `DSQL_ATTR_*` 别名,例如: |
| 152 | + |
| 153 | +- `connection.autoCommit` <=> `connection.DSQL_ATTR_AUTOCOMMIT` |
| 154 | +- `connection.port` <=> `connection.DSQL_ATTR_LOGIN_PORT` |
| 155 | + |
| 156 | +## Cursor |
| 157 | + |
| 158 | +### 方法 |
| 159 | + |
| 160 | +- `execute(statement, params=None, **kwargs)` |
| 161 | +- `executedirect(statement)` |
| 162 | +- `fetchall()` |
| 163 | +- `fetchone()` |
| 164 | +- `fetchmany(rows=arraysize)` |
| 165 | +- `prepare(statement)` |
| 166 | +- `parse(statement)`(当前实现返回 `NotSupportedError`) |
| 167 | +- `setinputsizes(*args, **kwargs)` |
| 168 | +- `executemany(statement, seq_of_params)` |
| 169 | +- `callproc(name, params=None)` |
| 170 | +- `callfunc(name, params=None)` |
| 171 | +- `setoutputsize(size, column=-1)` |
| 172 | +- `var(typ, size=0, arraysize=cursor.arraysize, inconverter=None, outconverter=None, typename=None, encoding_errors=None, bypass_decode=False, encodingErrors=None)` |
| 173 | +- `arrayvar(...)`(当前实现返回 `NotSupportedError`) |
| 174 | +- `bindnames()`(当前实现返回 `NotSupportedError`) |
| 175 | +- `close()` |
| 176 | +- `next()` |
| 177 | +- `nextset()` |
| 178 | +- `__enter__()` |
| 179 | +- `__exit__(exc_type, exc_value, exc_traceback)` |
| 180 | + |
| 181 | +### 成员属性 |
| 182 | + |
| 183 | +- `arraysize`(可写) |
| 184 | +- `bindarraysize`(可写) |
| 185 | +- `rowcount`(只读) |
| 186 | +- `rownumber`(只读) |
| 187 | +- `with_rows`(只读) |
| 188 | +- `statement`(只读) |
| 189 | +- `connection`(只读) |
| 190 | +- `column_names`(只读) |
| 191 | +- `lastrowid`(只读) |
| 192 | +- `execid`(只读) |
| 193 | +- `_isClosed`(内部) |
| 194 | +- `_statement`(内部) |
| 195 | +- `output_stream`(可写) |
| 196 | +- `description`(只读计算属性) |
| 197 | + |
| 198 | +## 异常层次 |
| 199 | + |
| 200 | +- `Warning` |
| 201 | +- `Error` |
| 202 | + - `InterfaceError` |
| 203 | + - `DatabaseError` |
| 204 | + - `DataError` |
| 205 | + - `OperationalError` |
| 206 | + - `IntegrityError` |
| 207 | + - `InternalError` |
| 208 | + - `ProgrammingError` |
| 209 | + - `NotSupportedError` |
| 210 | + |
| 211 | +此外还提供 `DmError` 对象(包含 `code`、`offset`、`message`、`context`)。 |
| 212 | + |
| 213 | +## 常量 |
| 214 | + |
| 215 | +### 调试与关库 |
| 216 | + |
| 217 | +- `DEBUG_CLOSE` |
| 218 | +- `DEBUG_OPEN` |
| 219 | +- `DEBUG_SWITCH` |
| 220 | +- `DEBUG_SIMPLE` |
| 221 | +- `SHUTDOWN_DEFAULT` |
| 222 | +- `SHUTDOWN_ABORT` |
| 223 | +- `SHUTDOWN_IMMEDIATE` |
| 224 | +- `SHUTDOWN_TRANSACTIONAL` |
| 225 | +- `SHUTDOWN_NORMAL` |
| 226 | + |
| 227 | +### 事务与访问模式 |
| 228 | + |
| 229 | +- `ISO_LEVEL_READ_DEFAULT` |
| 230 | +- `ISO_LEVEL_READ_UNCOMMITTED` |
| 231 | +- `ISO_LEVEL_READ_COMMITTED` |
| 232 | +- `ISO_LEVEL_REPEATABLE_READ` |
| 233 | +- `ISO_LEVEL_SERIALIZABLE` |
| 234 | +- `DSQL_MODE_READ_ONLY` |
| 235 | +- `DSQL_MODE_READ_WRITE` |
| 236 | +- `DSQL_AUTOCOMMIT_ON` |
| 237 | +- `DSQL_AUTOCOMMIT_OFF` |
| 238 | + |
| 239 | +### 编码与语言 |
| 240 | + |
| 241 | +- `PG_UTF8` |
| 242 | +- `PG_GBK` |
| 243 | +- `PG_BIG5` |
| 244 | +- `PG_ISO_8859_9` |
| 245 | +- `PG_EUC_JP` |
| 246 | +- `PG_EUC_KR` |
| 247 | +- `PG_KOI8R` |
| 248 | +- `PG_ISO_8859_1` |
| 249 | +- `PG_SQL_ASCII` |
| 250 | +- `PG_GB18030` |
| 251 | +- `PG_ISO_8859_11` |
| 252 | +- `LANGUAGE_CN` |
| 253 | +- `LANGUAGE_EN` |
| 254 | +- `LANGUAGE_CNT_HK`(条件编译) |
| 255 | + |
| 256 | +### 其他连接行为 |
| 257 | + |
| 258 | +- `DSQL_TRUE` |
| 259 | +- `DSQL_FALSE` |
| 260 | +- `DSQL_RWSEPARATE_ON` |
| 261 | +- `DSQL_RWSEPARATE_OFF` |
| 262 | +- `DSQL_TRX_ACTIVE` |
| 263 | +- `DSQL_TRX_COMPLETE` |
| 264 | +- `DSQL_MPP_LOGIN_GLOBAL` |
| 265 | +- `DSQL_MPP_LOGIN_LOCAL` |
| 266 | +- `DSQL_CB_CLOSE` |
| 267 | +- `DSQL_CB_PRESERVE` |
| 268 | + |
| 269 | +### 数据类型对象 |
| 270 | + |
| 271 | +模块还导出一组数据类型对象,可用于绑定/类型判断: |
| 272 | + |
| 273 | +- `INTERVAL`, `YEAR_MONTH_INTERVAL` |
| 274 | +- `BLOB`, `CLOB`, `LOB` |
| 275 | +- `BFILE`, `exBFILE` |
| 276 | +- `LONG_BINARY`, `LONG_STRING` |
| 277 | +- `DATE`, `TIME`, `TIMESTAMP` |
| 278 | +- `CURSOR` |
| 279 | +- `STRING`, `FIXED_STRING`, `BINARY`, `FIXED_BINARY` |
| 280 | +- `OBJECTVAR`, `objectvar` |
| 281 | +- `NUMBER`, `DOUBLE`, `REAL`, `BOOLEAN`, `DECIMAL` |
| 282 | +- `TIME_WITH_TIMEZONE`, `TIMESTAMP_WITH_TIMEZONE` |
| 283 | +- `BIGINT`, `ROWID` |
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