Description
Indexes present:
CREATE INDEX `idx` ON `default`(`_id`,(`join_yr`[0]))
CREATE INDEX `idx_cover_desc` ON `default`(`_id` DESC,((`VMs`[0]).`RAM`) DESC)
Below results are always consistent:
Query issued:
explain select min(_id) from default use index(idx) where _id is not missing;
{
|
"plan": { |
"#operator": "Sequence", |
"~children": [ |
{
|
"#operator": "IndexScan2", |
"covers": [ |
"cover ((`default`.`_id`))", |
"cover (((`default`.`join_yr`)[0]))", |
"cover ((meta(`default`).`id`))" |
],
|
"index": "idx", |
"index_id": "f3da0dc1748af4c5", |
"index_projection": { |
"entry_keys": [ |
0 |
]
|
},
|
"keyspace": "default", |
"limit": "1", |
"namespace": "default", |
"spans": [ |
{
|
"exact": true, |
"range": [ |
{
|
"inclusion": 0, |
"low": "null" |
}
|
]
|
}
|
],
|
"using": "gsi" |
},
|
{
|
"#operator": "Parallel", |
"maxParallelism": 1, |
"~child": { |
"#operator": "Sequence", |
"~children": [ |
{
|
"#operator": "Filter", |
"condition": "(cover ((`default`.`_id`)) is not missing)" |
},
|
{
|
"#operator": "InitialGroup", |
"aggregates": [ |
"min(cover ((`default`.`_id`)))" |
],
|
"group_keys": [] |
}
|
]
|
}
|
},
|
{
|
"#operator": "IntermediateGroup", |
"aggregates": [ |
"min(cover ((`default`.`_id`)))" |
],
|
"group_keys": [] |
},
|
{
|
"#operator": "FinalGroup", |
"aggregates": [ |
"min(cover ((`default`.`_id`)))" |
],
|
"group_keys": [] |
},
|
{
|
"#operator": "Parallel", |
"maxParallelism": 1, |
"~child": { |
"#operator": "Sequence", |
"~children": [ |
{
|
"#operator": "InitialProject", |
"result_terms": [ |
{
|
"expr": "min(cover ((`default`.`_id`)))" |
}
|
]
|
},
|
{
|
"#operator": "FinalProject" |
}
|
]
|
}
|
}
|
]
|
},
|
|
explain select min(_id) from default where _id is not missing;
{
|
"plan": { |
"#operator": "Sequence", |
"~children": [ |
{
|
"#operator": "IndexScan2", |
"covers": [ |
"cover ((`default`.`_id`))", |
"cover ((((`default`.`VMs`)[0]).`RAM`))", |
"cover ((meta(`default`).`id`))" |
],
|
"index": "idx_cover_desc", |
"index_id": "815302bac3c810b5", |
"index_projection": { |
"entry_keys": [ |
0 |
]
|
},
|
"keyspace": "default", |
"namespace": "default", |
"spans": [ |
{
|
"exact": true, |
"range": [ |
{
|
"inclusion": 0, |
"low": "null" |
}
|
]
|
}
|
],
|
"using": "gsi" |
},
|
{
|
"#operator": "Parallel", |
"~child": { |
"#operator": "Sequence", |
"~children": [ |
{
|
"#operator": "Filter", |
"condition": "(cover ((`default`.`_id`)) is not missing)" |
},
|
{
|
"#operator": "InitialGroup", |
"aggregates": [ |
"min(cover ((`default`.`_id`)))" |
],
|
"group_keys": [] |
}
|
]
|
}
|
},
|
{
|
"#operator": "IntermediateGroup", |
"aggregates": [ |
"min(cover ((`default`.`_id`)))" |
],
|
"group_keys": [] |
},
|
{
|
"#operator": "FinalGroup", |
"aggregates": [ |
"min(cover ((`default`.`_id`)))" |
],
|
"group_keys": [] |
},
|
{
|
"#operator": "Parallel", |
"~child": { |
"#operator": "Sequence", |
"~children": [ |
{
|
"#operator": "InitialProject", |
"result_terms": [ |
{
|
"expr": "min(cover ((`default`.`_id`)))" |
}
|
]
|
},
|
{
|
"#operator": "FinalProject" |
}
|
]
|
}
|
}
|
]
|
},
|
Attachments
Issue Links
- duplicates
-
MB-24008 [n1ql ASC/DESC] Query is not using the same index consistenty.
-
- Closed
-