mirror of https://github.com/mongodb/mongo
17 lines
450 B
JavaScript
17 lines
450 B
JavaScript
// Check that optimal query plans do not contain empty but unindexed ranges.
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t = db.jstests_indexz;
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t.drop();
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t.ensureIndex( {a:1} );
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t.ensureIndex( {a:1,b:1} );
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t.save( {a:1,b:[1,3]} );
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// The plan for single key index {a:1} is not marked optimal because a constraint exists on field
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// {b:1}.
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explain = t.find( {a:1,b:{$gt:2,$lt:2}} ).explain(true);
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assert.eq( 'BtreeCursor a_1_b_1', explain.cursor );
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assert.eq( 1, explain.allPlans.length );
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