Revision 3056
Added by Aaron Marcuse-Kubitza about 12 years ago
| sql.py | ||
|---|---|---|
| 755 | 755 |
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| 756 | 756 |
return insert_select(db, table, cols, query, *args, **kw_args) |
| 757 | 757 |
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| 758 |
def mk_update(db, table, changes=None, cond=None): |
|
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def mk_update(db, table, changes=None, cond=None, in_place=False):
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''' |
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@param changes [(col, new_value),...] |
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* container can be any iterable type |
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* col: sql_gen.Code|str (for col name) |
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* new_value: sql_gen.Code|literal value |
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@param cond sql_gen.Code WHERE condition. e.g. use sql_gen.*Cond objects. |
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@param in_place If set, locks the table and updates rows in place. |
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This avoids creating dead rows in PostgreSQL. |
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* changes may only change one column |
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* cond must be None |
|
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@return str query |
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''' |
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if in_place: |
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assert len(changes) == 1 |
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assert cond == None |
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query = 'UPDATE '+sql_gen.as_Table(table).to_str(db)+'\nSET\n' |
| 768 | 776 |
query += ',\n'.join((sql_gen.to_name_only_col(col, table).to_str(db)+' = ' |
| 769 | 777 |
+sql_gen.as_Value(new_value).to_str(db) for col, new_value in changes)) |
Also available in: Unified diff
sql.py: mk_update(): Added in_place param