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4 check-ins related to "avoid-unusable-match"

Have FTS assign extremely high costs to plans that feature unusable MATCH constraints. This discourages the planner from choosing such plans, which lead to "unable to use function MATCH in the requested context" errors. check-in: fa8be488 user: dan tags: trunk
Instead of having the planner ignore plans with unusable MATCH constraints, have FTS assign extremely high costs to such plans in order to discourage the planner from using them. Closed-Leaf check-in: 24f84b38 user: dan tags: avoid-unusable-match
Have the planner detect cases where a MATCH constraint is applied to a virtual table, and ignore any plans that do not allow the virtual table implementation to implement the MATCH filtering. check-in: 19f3208b user: dan tags: avoid-unusable-match
Avoid some unnecessary OP_SCopy operations when inserting into a table with multiple indices. check-in: 429018b1 user: drh tags: trunk