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// In MongoDB 3.4, $graphLookup was introduced. In this file, we test the error cases.
load("jstests/aggregation/extras/utils.js"); // For "assertErrorCode".
(function() {
"use strict";
var local = db.local;
local.drop();
local.insert({});
var pipeline = {
$graphLookup: {
from: "foreign",
startWith: {$const: 0},
connectToField: "a",
connectFromField: "b",
as: "output",
maxDepth: "string"
}
};
assertErrorCode(local, pipeline, 40100, "maxDepth must be numeric");
pipeline = {
$graphLookup: {
from: "foreign",
startWith: {$const: 0},
connectToField: "a",
connectFromField: "b",
as: "output",
maxDepth: -1
}
};
assertErrorCode(local, pipeline, 40101, "maxDepth must be nonnegative");
pipeline = {
$graphLookup: {
from: "foreign",
startWith: {$const: 0},
connectToField: "a",
connectFromField: "b",
as: "output",
maxDepth: 2.3
}
};
assertErrorCode(local, pipeline, 40102, "maxDepth must be representable as a long long");
pipeline = {
$graphLookup: {
from: -1,
startWith: {$const: 0},
connectToField: "a",
connectFromField: "b",
as: "output"
}
};
assertErrorCode(local, pipeline, 40103, "from must be a string");
pipeline = {
$graphLookup: {
from: "foreign",
startWith: {$const: 0},
connectToField: "a",
connectFromField: "b",
as: 0
}
};
assertErrorCode(local, pipeline, 40103, "as must be a string");
pipeline = {
$graphLookup: {
from: "foreign",
startWith: {$const: 0},
connectToField: "a",
connectFromField: "b",
as: "$output"
}
};
assertErrorCode(local, pipeline, 16410, "as cannot be a fieldPath");
pipeline = {
$graphLookup: {
from: "foreign",
startWith: {$const: 0},
connectToField: "a",
connectFromField: 0,
as: "output"
}
};
assertErrorCode(local, pipeline, 40103, "connectFromField must be a string");
pipeline = {
$graphLookup: {
from: "foreign",
startWith: {$const: 0},
connectToField: "a",
connectFromField: "$b",
as: "output"
}
};
assertErrorCode(local, pipeline, 16410, "connectFromField cannot be a fieldPath");
pipeline = {
$graphLookup: {
from: "foreign",
startWith: {$const: 0},
connectToField: 0,
connectFromField: "b",
as: "output"
}
};
assertErrorCode(local, pipeline, 40103, "connectToField must be a string");
pipeline = {
$graphLookup: {
from: "foreign",
startWith: {$const: 0},
connectToField: "$a",
connectFromField: "b",
as: "output"
}
};
assertErrorCode(local, pipeline, 16410, "connectToField cannot be a fieldPath");
pipeline = {
$graphLookup: {
from: "foreign",
startWith: {$const: 0},
connectToField: "a",
connectFromField: "b",
as: "output",
depthField: 0
}
};
assertErrorCode(local, pipeline, 40103, "depthField must be a string");
pipeline = {
$graphLookup: {
from: "foreign",
startWith: {$const: 0},
connectToField: "a",
connectFromField: "b",
as: "output",
depthField: "$depth"
}
};
assertErrorCode(local, pipeline, 16410, "depthField cannot be a fieldPath");
pipeline = {
$graphLookup: {
from: "foreign",
startWith: {$const: 0},
connectToField: "a",
connectFromField: "b",
as: "output",
notAField: "foo"
}
};
assertErrorCode(local, pipeline, 40104, "unknown argument");
pipeline = {
$graphLookup:
{from: "foreign", startWith: {$const: 0}, connectFromField: "b", as: "output"}
};
assertErrorCode(local, pipeline, 40105, "connectToField was not specified");
pipeline = {
$graphLookup:
{from: "foreign", startWith: {$const: 0}, connectToField: "a", as: "output"}
};
assertErrorCode(local, pipeline, 40105, "connectFromField was not specified");
pipeline = {
$graphLookup: {from: "foreign", connectToField: "a", connectFromField: "b", as: "output"}
};
assertErrorCode(local, pipeline, 40105, "startWith was not specified");
pipeline = {
$graphLookup:
{from: "foreign", startWith: {$const: 0}, connectToField: "a", connectFromField: "b"}
};
assertErrorCode(local, pipeline, 40105, "as was not specified");
pipeline = {
$graphLookup:
{startWith: {$const: 0}, connectToField: "a", connectFromField: "b", as: "output"}
};
assertErrorCode(local, pipeline, 40105, "from was not specified");
// $graphLookup can only be performed on a collection that has a unique _id index.
db.createCollection("unindexed", {autoIndexId: false});
pipeline = {
$graphLookup: {
from: "unindexed",
as: "out",
startWith: "tmp",
connectFromField: "x",
connectToField: "y"
}
};
assertErrorCode(local, pipeline, 40106, "foreign collection did not have a unique _id index");
// $graphLookup can only consume at most 100MB of memory.
var foreign = db.foreign;
foreign.drop();
// Here, the visited set exceeds 100MB.
var bulk = foreign.initializeUnorderedBulkOp();
var initial = [];
for (var i = 0; i < 8; i++) {
var obj = {
_id: i
};
obj['longString'] = new Array(14 * 1024 * 1024).join('x');
initial.push(i);
bulk.insert(obj);
}
assert.writeOK(bulk.execute());
pipeline = {
$graphLookup: {
from: "foreign",
startWith: {$literal: initial},
connectToField: "_id",
connectFromField: "notimportant",
as: "graph"
}
};
assertErrorCode(local, pipeline, 40099, "maximum memory usage reached");
// Here, the visited set should grow to approximately 90 MB, and the frontier should push memory
// usage over 100MB.
foreign.drop();
var bulk = foreign.initializeUnorderedBulkOp();
for (var i = 0; i < 14; i++) {
var obj = {
from: 0,
to: 1
};
obj['s'] = new Array(7 * 1024 * 1024).join(' ');
bulk.insert(obj);
}
assert.writeOK(bulk.execute());
pipeline = {
$graphLookup: {
from: "foreign",
startWith: {$literal: 0},
connectToField: "from",
connectFromField: "s",
as: "out"
}
};
assertErrorCode(local, pipeline, 40099, "maximum memory usage reached");
// Here, we test that the cache keeps memory usage under 100MB, and does not cause an error.
foreign.drop();
var bulk = foreign.initializeUnorderedBulkOp();
for (var i = 0; i < 13; i++) {
var obj = {
from: 0,
to: 1
};
obj['s'] = new Array(7 * 1024 * 1024).join(' ');
bulk.insert(obj);
}
assert.writeOK(bulk.execute());
var res = local.aggregate(
{
$graphLookup: {
from: "foreign",
startWith: {$literal: 0},
connectToField: "from",
connectFromField: "to",
as: "out"
}
},
{$unwind: {path: "$out"}}).toArray();
assert.eq(res.length, 13);
}());
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