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4 Commits

Author SHA1 Message Date
dan c456a76fb3 When generating individual loops for each ORed term of an OR scan, move any 
constant WHERE expressions outside of the loop, as is done for top-level
loops.

FossilOrigin-Name: e4a022be4b069b08cfdfda5295461676b99d28e17bbbedfbcb362dec69de59bd
 2017-06-22 16:51:16 +00:00
drh f46af73720 If the cost of two whereLoop objects is the same in every way except that 
one has fewer expected output rows than the other, then choose the one with
fewer output rows.

FossilOrigin-Name: 79e458ef7acfddbc189163e3e958da529becb130
 2013-08-30 17:35:44 +00:00
drh fd5874d23d Add the "queryplanner" test permutation. Continuing refinements to NGQP. 
FossilOrigin-Name: 25e2cde105a19293bdb9c001b48624e5d7f8c4e5
 2013-06-12 14:52:39 +00:00
drh 782d68a4cd Try to take into account the cost of inner loops when selecting which table 
of a join to use for the outer loop.

FossilOrigin-Name: 942556342a332b04a11169bb04f387d741ef9488
 2012-11-09 17:59:26 +00:00