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// Check that the explain result count does proper deduping.
t = db.jstests_explain5;
t.drop();
t.ensureIndex( {a:1} );
t.ensureIndex( {b:1} );
t.save( {a:[1,2,3],b:[4,5,6]} );
for( i = 0; i < 10; ++i ) {
t.save( {} );
}
// Check with a single in order plan.
explain = t.find( {a:{$gt:0}} ).explain( true );
assert.eq( 1, explain.n );
assert.eq( 1, explain.allPlans[ 0 ].n );
// Check with a single out of order plan.
explain = t.find( {a:{$gt:0}} ).sort( {z:1} ).hint( {a:1} ).explain( true );
assert.eq( 1, explain.n );
assert.eq( 1, explain.allPlans[ 0 ].n );
// Check with multiple plans.
/* STAGE_MIGRATION:
// As part of 2.7 we plan to rework explain (see SERVER-10448 for details)
// so didn't carry over old behavior from multi_plan_runner into multi_plan stage
// Specifically, missing call to explainMultiPlan, so can't explain.allPlans[1].n below
explain = t.find( {a:{$gt:0},b:{$gt:0}} ).explain( true );
assert.eq( 1, explain.n );
assert.eq( 1, explain.allPlans[ 0 ].n );
assert.eq( 1, explain.allPlans[ 1 ].n );
explain = t.find( {$or:[{a:{$gt:0},b:{$gt:0}},{a:{$gt:-1},b:{$gt:-1}}]} ).explain( true );
assert.eq( 1, explain.n );
// Check 'n' for every alternative query plan.
for (var i = 0; i < explain.allPlans.length; ++i) {
assert.eq( 1, explain.allPlans[i].n );
}
*/
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