drh
e8c4f03266
In the OP_Column opcode, if the cursor is marked NullRow (due to being the
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right table of a LEFT JOIN that does not match) and the cursor is the table
cursor for an OR-optimization with a covering index, then do not substitute
the covering index cursor, since the covering index cursor does not have
the NullRow flag set. Ticket [aa4378693018aa99]
FossilOrigin-Name: f02030b3403d67734bba471a91ad5bfdb03ddf6fdc3ef14808a04495e43b0470
2020-02-22 13:01:19 +00:00
dan
b40897ab5e
If all branches of an OR optimize scan that is the rhs of a LEFT JOIN use the
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same index, set the index cursor to return NULL values if there are no matches
for a row on the lhs.
FossilOrigin-Name: e7b9bc678ecb75c594d9d3ade12a99a8d551cdc9
2016-10-26 15:46:09 +00:00
dan
eaa6cd87e8
Add tests for the change on this branch.
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FossilOrigin-Name: 7cb697f82932a2581af69350117a29c9c8a2544f
2016-01-29 21:16:13 +00:00
dan
de892d9660
Experimental attempt to make better use of covering indexes within OR queries.
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FossilOrigin-Name: a323ac3a9d42bd5cb38d724c7e1180584b91054c
2016-01-29 19:29:45 +00:00
dan
8aad8c482c
Update tests in whereD.test to account for the change in the previous commit.
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FossilOrigin-Name: da49700ca148d91e1b8863c2eb6ee79144e83ac9
2015-04-11 11:53:39 +00:00
drh
d83cad235a
Modify the OR-clause handling so that it can safely deal with OR-clause
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with 17 or more terms. Fix for ticket [10fb063b1179be53ea0b53bb].
FossilOrigin-Name: a67b5312f63909737c052fe58ab5772d45530d49
2014-04-10 02:24:48 +00:00
drh
6186b30901
Add test cases to verify that ticket [bc1aea7b725f2761] has been fixed in
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the NGQP.
FossilOrigin-Name: 9b97af94ae7b1624ef1f5adee58010593fbb8b1c
2013-06-03 14:15:34 +00:00
mistachkin
6292c01634
Fix duplicate test name in whereD.test.
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FossilOrigin-Name: 1182b54af0fd43d5e6aa6399837e7915aa60a578
2012-10-10 13:59:11 +00:00
drh
90abfd086f
Merge the fix for ticket [d02e1406a58ea02] into trunk.
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FossilOrigin-Name: dd34bec389359845b86f4cc4906ab440f92dcab9
2012-10-09 21:07:23 +00:00
dan
606bb3a54e
Another test for whereD.test.
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FossilOrigin-Name: 29d586178dcfdb99eaf7ce768668ab0aa9898c83
2012-08-24 19:58:18 +00:00
dan
899339154e
Add extra tests to whereD.test.
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FossilOrigin-Name: 7e961eef6b7260dd8deb8b3812218a874c382885
2012-08-24 19:52:25 +00:00
drh
8fea5f3b97
More test cases for OR-optimization covering indices.
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FossilOrigin-Name: e5c3190c27b69dc50f348c849a81b79031b2fb67
2012-08-24 17:52:54 +00:00
drh
2797c21639
Additional test cases for OR-optimization with covering indices, including
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one test case that currently fails.
FossilOrigin-Name: d8b7ab37120ac20e60b6a600cd0e5b34a09cf97a
2012-08-24 15:29:03 +00:00
dan
bfca6a4066
Experimental change to support the covering index optimization for queries with OR terms in the WHERE clause that search a single index more than once.
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FossilOrigin-Name: 1dc8c7c741a82bb98a07f3fdb8142d8bc8d8a98b
2012-08-24 10:52:35 +00:00
