31 lines
767 B
JavaScript
31 lines
767 B
JavaScript
// When an index becomes multikey the query plan cache is cleared. SERVER-5301
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t = db.jstests_queryoptimizer9;
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t.drop();
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function recordQueryPlan() {
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t.find( { a:1, b:1 } ).explain();
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}
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function hasCachedPlan() {
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return !!t.find( { a:1, b:1 } ).explain( true ).oldPlan;
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}
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t.ensureIndex( { a:1 } );
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t.save( { a:1 } );
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recordQueryPlan();
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assert( hasCachedPlan() );
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// While the index is not multikey the cached query plan is not cleared.
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t.save( { a:2 } );
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assert( hasCachedPlan() );
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// When the index becomes multikey the cached query plan is cleared.
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t.save( { a:[ 3, 4 ] } );
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assert( !hasCachedPlan() );
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// When the index remains multikey the cached query plan is not cleared.
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recordQueryPlan();
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t.save( { a:[ 5, 6 ] } );
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assert( hasCachedPlan() );
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