diff options
| author | James Wahlin <james.wahlin@mongodb.com> | 2019-10-18 13:13:38 +0000 |
|---|---|---|
| committer | evergreen <evergreen@mongodb.com> | 2019-10-18 13:13:38 +0000 |
| commit | 6ca9be706ce03a2c79d29feac3cfd294cc09445d (patch) | |
| tree | 647b25156fd48d8dd5cc736cf0ec3c264f1976e7 /src/mongo/db/query/query_planner_tree_test.cpp | |
| parent | dab2ae229660af56a786a084ebc36666c4dd6a91 (diff) | |
| download | mongo-6ca9be706ce03a2c79d29feac3cfd294cc09445d.tar.gz | |
SERVER-41872 PlanEnumerator AndAssignment::choices ordering not stable and is relevant to set of plans generated
Diffstat (limited to 'src/mongo/db/query/query_planner_tree_test.cpp')
| -rw-r--r-- | src/mongo/db/query/query_planner_tree_test.cpp | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/src/mongo/db/query/query_planner_tree_test.cpp b/src/mongo/db/query/query_planner_tree_test.cpp index 1e82fd1fb1d..e875163254d 100644 --- a/src/mongo/db/query/query_planner_tree_test.cpp +++ b/src/mongo/db/query/query_planner_tree_test.cpp @@ -2307,6 +2307,68 @@ TEST_F(QueryPlannerTest, ContainedOrPushdownIndexedExpr) { assertSolutionExists("{cscan: {dir: 1}}}}"); } +// SERVER-41872 fixed a case where variable "choice" ordering in the PlanEnumerator memo could lead +// to different sets of solutions generated for the same input. This would occur in the case where +// we only enumerate a subset of possible plans due to reaching internal limits and enumerate plans +// in a non-stable order. With the fix for SERVER-41872, PlanEnumerator ordering is stable and +// expected to always return the same set of solutions for a given input. +TEST_F(QueryPlannerTest, SolutionSetStableWhenOrEnumerationLimitIsReached) { + params.options = QueryPlannerParams::NO_TABLE_SCAN; + addIndex(BSON("d" << 1)); + addIndex(BSON("e" << 1)); + addIndex(BSON("f" << 1)); + addIndex(BSON("f" << 1 << "y" << 1)); + addIndex(BSON("a" << 1)); + addIndex(BSON("b" << 1)); + addIndex(BSON("c" << 1)); + addIndex(BSON("c" << 1 << "x" << 1)); + + runQueryAsCommand( + fromjson("{find: 'testns', filter: {$or: [{a: 1, b: 1, c: 1}, {d: 1, e: 1, f: 1}]}}")); + + assertNumSolutions(10U); + + assertSolutionExists( + "{or: {nodes: [{fetch: {filter: {b: {$eq: 1}, c: {$eq: 1} }, node: {ixscan: {pattern: {a: " + "1}}}}}, {fetch: {filter: {e: {$eq: 1}, f: {$eq: 1} }, node: {ixscan: {pattern: {d: " + "1}}}}}]}}"); + assertSolutionExists( + "{or: {nodes: [{fetch: {filter: {a: {$eq: 1}, c: {$eq: 1} }, node: {ixscan: {pattern: {b: " + "1}}}}}, {fetch: {filter: {e: {$eq: 1}, f: {$eq: 1} }, node: {ixscan: {pattern: {d: " + "1}}}}}]}}"); + assertSolutionExists( + "{or: {nodes: [{fetch: {filter: {a: {$eq: 1}, b: {$eq: 1} }, node: {ixscan: {pattern: {c: " + "1}}}}}, {fetch: {filter: {e: {$eq: 1}, f: {$eq: 1} }, node: {ixscan: {pattern: {d: " + "1}}}}}]}}"); + assertSolutionExists( + "{or: {nodes: [{fetch: {filter: {a: {$eq: 1}, b: {$eq: 1} }, node: {ixscan: {pattern: {c: " + "1, x: 1}}}}}, {fetch: {filter: {e: {$eq: 1}, f: {$eq: 1} }, node: {ixscan: {pattern: {d: " + "1}}}}}]}}"); + assertSolutionExists( + "{or: {nodes: [{fetch: {filter: {b: {$eq: 1}, c: {$eq: 1} }, node: {ixscan: {pattern: {a: " + "1}}}}}, {fetch: {filter: {d: {$eq: 1}, f: {$eq: 1} }, node: {ixscan: {pattern: {e: " + "1}}}}}]}}"); + assertSolutionExists( + "{or: {nodes: [{fetch: {filter: {a: {$eq: 1}, c: {$eq: 1} }, node: {ixscan: {pattern: {b: " + "1}}}}}, {fetch: {filter: {d: {$eq: 1}, f: {$eq: 1} }, node: {ixscan: {pattern: {e: " + "1}}}}}]}}"); + assertSolutionExists( + "{or: {nodes: [{fetch: {filter: {a: {$eq: 1}, b: {$eq: 1} }, node: {ixscan: {pattern: {c: " + "1}}}}}, {fetch: {filter: {d: {$eq: 1}, f: {$eq: 1} }, node: {ixscan: {pattern: {e: " + "1}}}}}]}}"); + assertSolutionExists( + "{or: {nodes: [{fetch: {filter: {a: {$eq: 1}, b: {$eq: 1} }, node: {ixscan: {pattern: {c: " + "1, x: 1}}}}}, {fetch: {filter: {d: {$eq: 1}, f: {$eq: 1} }, node: {ixscan: {pattern: {e: " + "1}}}}}]}}"); + assertSolutionExists( + "{or: {nodes: [{fetch: {filter: {b: {$eq: 1}, c: {$eq: 1} }, node: {ixscan: {pattern: {a: " + "1}}}}}, {fetch: {filter: {d: {$eq: 1}, e: {$eq: 1} }, node: {ixscan: {pattern: {f: " + "1}}}}}]}}"); + assertSolutionExists( + "{or: {nodes: [{fetch: {filter: {a: {$eq: 1}, c: {$eq: 1} }, node: {ixscan: {pattern: {b: " + "1}}}}}, {fetch: {filter: {d: {$eq: 1}, e: {$eq: 1} }, node: {ixscan: {pattern: {f: " + "1}}}}}]}}"); +} } // namespace } // namespace mongo |