mirror of https://github.com/mongodb/mongo
53 lines
2.2 KiB
JavaScript
53 lines
2.2 KiB
JavaScript
// Compaction of a v0 index converts it to a v1 index using a v1 index comparator during external
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// sort. SERVER-6499
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t = db.jstests_compact2;
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t.drop();
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/**
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* Assert that the index is of the expected version and its keys are ordered consistently with this
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* version, and that the unique and background fields are set correctly.
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*/
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function assertIndex( expectedVersion, unique, background ) {
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indexSpec = db.system.indexes.findOne( { ns:t.toString(), key:{ date:1 } } );
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// The index version is as expected.
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assert.eq( expectedVersion, indexSpec.v );
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// The index uniqueness is as expected (treat missing and false unique specs as equivalent).
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assert.eq( !unique, !indexSpec.unique );
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// Background is as expected.
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assert.eq( !background, !indexSpec.background );
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// Check that 'date' key ordering is consistent with the index version.
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dates = t.find().hint( { date:1 } ).toArray().map( function( x ) { return x.date; } );
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if ( expectedVersion == 0 ) {
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// Under v0 index comparison, new Date( -1 ) > new Date( 1 ).
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assert.eq( [ new Date( 1 ), new Date( -1 ) ], dates );
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}
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else {
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// Under v1 index comparsion, new Date( -1 ) < new Date( 1 ).
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assert.eq( [ new Date( -1 ), new Date( 1 ) ], dates );
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}
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}
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/** Compact a collection and check the resulting indexes. */
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function checkCompact( originalVersion, unique, background ) {
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t.drop();
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t.save( { date:new Date( 1 ) } );
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t.save( { date:new Date( -1 ) } );
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t.ensureIndex( { date:1 }, { unique:unique, v:originalVersion, background:background } );
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assertIndex( originalVersion, unique, background );
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// Under SERVER-6499, compact fails when a v0 index is converted to a v1 index and key
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// comparisons are inconsistent, as with the date values in this test.
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assert.commandWorked( t.runCommand( "compact" ) );
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assert( !db.getLastError() );
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// Compact built an index with the default index version (v1). Uniqueness is maintained, but
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// background always becomes false.
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assertIndex( 1, unique, false );
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}
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checkCompact( 0, true, true );
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checkCompact( 0, false, false );
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checkCompact( 1, true, false );
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checkCompact( 1, false, true );
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