sqlite3KeyInfoAlloc(). Always allocate enough space so that
sqlite3VdbeRecordCompare() can avoid checking boundaries and hence
run faster.
FossilOrigin-Name: 7301bedd94c8610568349953b18ff3575203e1b2
This is the first step toward adding an optimization that will omit tables
from a join that do not contribute to the result.
FossilOrigin-Name: 2c2577e69ccb47f1af674a755e71221e2ca0b322
sqliteInt.h and into where.c. This will facilitate future refactoring
of the internal query planner data structures.
FossilOrigin-Name: 1574653b9b4522b489d4c62d9cf70166bb3bddfd
comparison collations before using the merge algorithm for compound
SELECT statements. Candidate fix for ticket [6709574d2a8d8].
FossilOrigin-Name: fc3630cdef6e2cdbfb4e7b373d1a094753e55016
([https://bugzilla.mozilla.org/show_bug.cgi?id=840377])
describes an infinite recursion. We are unable to reproduce the problem.
Nevertheless, this check-in should prevent the problem from ever occurring
again.
FossilOrigin-Name: b7222a2bd035e7a32dc9416b25a488d9d017aad1
complex queries involving deeply nested views of UNION ALL compounds.
Ticket [db4d96798da8]. Secondary to ticket [d58ccbb3f1b7].
FossilOrigin-Name: 497ee36cb8d07c936e6896135163c5cd7e94bdde
if the number of references to a table exceeds the maximum due to nested
UNION views. Fix for ticket [d58ccbb3f1].
FossilOrigin-Name: c2462a95ed8e1e69886681400d673207d906bf1b
itself inside parentheses. Generate code as if the parentheses did not
exist, rather than the old behavior of manifesting the parenthesized table
into a transient table. Also, tag every FROM-clause SELECT subquery that is
generated by a parenthesized FROM-clause expression using the SF_NestedFrom
flag. The new SF_NestedFrom flag is not yet used for anything.
FossilOrigin-Name: 7fecced466d86a66b0b751c5b5608141e134fe2d
The Expr.pColl field is removed from the Expr object. The COLLATE operator
now becomes a separate instance of Expr in the expression tree. The code
generator looks up the correct collating function as needed, rather than
referring to Expr.pColl.
FossilOrigin-Name: 8542e6180d4321d45b34f33e481658908ce1430d
This fixes the test script "shared9.test", though there is still a memory leak.
And there are other problems. Consider this a work-in-progress.
FossilOrigin-Name: fd011cb22f2d899d94ec7ce22641d7a8f5e19972
built-in test. Add specific bit patterns to disable ORDER BY using an
index in general and for joins. Use macros to test for bits in the
disabled-optimization bit vector, in order to make the code clearer.
FossilOrigin-Name: d2fcba1e143beca8c45724d2108870657c269e17
to make it easier to extend to support optimizing out ORDER BY on joins.
No actual behavior changes, yet.
FossilOrigin-Name: 96496ddae12a239b30a1fc997fbea43e3a75bfe7
code. Reduce the number of OP_Column operations needed to perform a
WHERE_DISTINCT_ORDERED.
FossilOrigin-Name: 79e922f7ae29bbe06d639d648fbd72523cf9a28e
"distinct" to "distinctTab". Generate cleaner code w/o unnecessary P4
and P5 values on the OP_Null for WHERE_DISTINCT_ORDERED.
FossilOrigin-Name: 0cda241a2bcb3c6f2ae6c48f522780bc4eddfc02
