41 lines
820 B
JavaScript
41 lines
820 B
JavaScript
// @tags: [does_not_support_stepdowns]
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t = db.mr_index;
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t.drop();
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outName = "mr_index_out";
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out = db[outName];
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out.drop();
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t.insert({tags: [1]});
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t.insert({tags: [1, 2]});
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t.insert({tags: [1, 2, 3]});
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t.insert({tags: [3]});
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t.insert({tags: [2, 3]});
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t.insert({tags: [2, 3]});
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t.insert({tags: [1, 2]});
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m = function() {
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for (i = 0; i < this.tags.length; i++)
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emit(this.tags[i], 1);
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};
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r = function(k, vs) {
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return Array.sum(vs);
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};
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ex = function() {
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return out.find().sort({value: 1}).explain("executionStats");
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};
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res = t.mapReduce(m, r, {out: outName});
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assert.eq(3, ex().executionStats.nReturned, "A1");
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out.ensureIndex({value: 1});
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assert.eq(3, ex().executionStats.nReturned, "A2");
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res = t.mapReduce(m, r, {out: outName});
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assert.eq(3, ex().executionStats.nReturned, "B1");
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res.drop();
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