Provide a hook to override the generation of an UPDATE..FROM clause. MySQL and MSSQL override this.
(
self, update_stmt, from_table, extra_froms, from_hints, **kw
)
| 6315 | return from_table._compiler_dispatch(self, iscrud=True, **kw) |
| 6316 | |
| 6317 | def update_from_clause( |
| 6318 | self, update_stmt, from_table, extra_froms, from_hints, **kw |
| 6319 | ): |
| 6320 | """Provide a hook to override the generation of an |
| 6321 | UPDATE..FROM clause. |
| 6322 | |
| 6323 | MySQL and MSSQL override this. |
| 6324 | |
| 6325 | """ |
| 6326 | raise NotImplementedError( |
| 6327 | "This backend does not support multiple-table " |
| 6328 | "criteria within UPDATE" |
| 6329 | ) |
| 6330 | |
| 6331 | def visit_update( |
| 6332 | self, |