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Overview
| Comment: | Adjust comments to show that subquery flattening restriction (10) was removed from the code back in 2005. This is a comment change only. |
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| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: | 4ff0eb96bc364baed2d8005c69291ca9 |
| User & Date: | drh 2014-09-15 11:14:50 |
Context
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2014-09-15
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| 14:46 | Do not flatten aggregate subqueries that contain min() or max() functions so that if the min()/max() are discarded by the outer query, they still function and cause non-aggregate expression to be evaluated on the minimal or maximal row. check-in: 0bdf1a08 user: drh tags: trunk | |
| 11:14 | Adjust comments to show that subquery flattening restriction (10) was removed from the code back in 2005. This is a comment change only. check-in: 4ff0eb96 user: drh tags: trunk | |
|
2014-09-12
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| 20:30 | Small performance improvement to the dirty list handling in the pager. check-in: b332a84d user: drh tags: trunk | |
Changes
Changes to src/select.c.
3127 3128 3129 3130 3131 3132 3133 3134 3135 3136 3137 3138 3139 3140 3141 3142 |
** single NULL.
**
** (8) The subquery does not use LIMIT or the outer query is not a join.
**
** (9) The subquery does not use LIMIT or the outer query does not use
** aggregates.
**
** (10) The subquery does not use aggregates or the outer query does not
** use LIMIT.
**
** (11) The subquery and the outer query do not both have ORDER BY clauses.
**
** (**) Not implemented. Subsumed into restriction (3). Was previously
** a separate restriction deriving from ticket #350.
**
** (13) The subquery and outer query do not both use LIMIT.
|
> > | | |
3127 3128 3129 3130 3131 3132 3133 3134 3135 3136 3137 3138 3139 3140 3141 3142 3143 3144 |
** single NULL. ** ** (8) The subquery does not use LIMIT or the outer query is not a join. ** ** (9) The subquery does not use LIMIT or the outer query does not use ** aggregates. ** ** (**) Restriction (10) was removed from the code on 2005-02-05 but we ** accidently carried the comment forward until 2014-09-15. Original ** text: "The subquery does not use aggregates or the outer query does not ** use LIMIT." ** ** (11) The subquery and the outer query do not both have ORDER BY clauses. ** ** (**) Not implemented. Subsumed into restriction (3). Was previously ** a separate restriction deriving from ticket #350. ** ** (13) The subquery and outer query do not both use LIMIT. |