// test that or duplicates are dropped in certain special cases
t = db.jstests_orc;
t.drop();

// The goal here will be to ensure the full range of valid values is scanned for each or clause, in order to ensure that
// duplicates are eliminated properly in the cases below when field range elimination is not employed.  The deduplication
// of interest will occur on field a.  The range specifications for fields b and c are such that (in the current
// implementation) field range elimination will not occur between the or clauses, meaning that the full range of valid values
// will be scanned for each clause and deduplication will be forced.

// NOTE This test uses some tricks to avoid or range elimination, but in future implementations these tricks may not apply.
// Perhaps it would be worthwhile to create a mode where range elimination is disabled so it will be possible to write a more
// robust test.

t.ensureIndex( {a:-1,b:1,c:1} );

// sanity test
t.save( {a:null,b:4,c:4} );
assert.eq( 1, t.count( {$or:[{a:null,b:{$gte:0,$lte:5},c:{$gte:0,$lte:5}},{a:null,b:{$gte:3,$lte:8},c:{$gte:3,$lte:8}}]} ) );

// from here on is SERVER-2245
t.remove({});
t.save( {b:4,c:4} );
assert.eq( 1, t.count( {$or:[{a:null,b:{$gte:0,$lte:5},c:{$gte:0,$lte:5}},{a:null,b:{$gte:3,$lte:8},c:{$gte:3,$lte:8}}]} ) );

//t.remove({});
//t.save( {a:[],b:4,c:4} );
//printjson( t.find( {$or:[{a:[],b:{$gte:0,$lte:5},c:{$gte:0,$lte:5}},{a:[],b:{$gte:3,$lte:8},c:{$gte:3,$lte:8}}]} ).explain() );
//assert.eq( 1, t.count( {$or:[{a:[],b:{$gte:0,$lte:5},c:{$gte:0,$lte:5}},{a:[],b:{$gte:3,$lte:8},c:{$gte:3,$lte:8}}]} ) );