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SQL: Enable the InnerAggregates inside PIVOT #65792

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Merged
palesz merged 6 commits into from
Dec 7, 2020
Merged

SQL: Enable the InnerAggregates inside PIVOT #65792

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63ffe2e
SQL: Enable the InnerAggregates inside PIVOT
Nov 30, 2020
a6208fb
Additional, more complicated testcases
Dec 3, 2020
19dc1c6
Test that `PIVOT` and `GROUP BY` has same query
Dec 3, 2020
3867593
Merge remote-tracking branch 'origin/master' into feature/pivot-inner…
Dec 3, 2020
cca0ed7
Utilized SQLFunctionRegistry to look up the `AggregateFunction`s
Dec 4, 2020
8480e39
Merge remote-tracking branch 'origin/master' into feature/pivot-inner…
Dec 4, 2020
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24 changes: 24 additions & 0 deletions x-pack/plugin/sql/qa/server/src/main/resources/pivot.csv-spec
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Original file line number Diff line number Diff line change
Expand Up @@ -201,6 +201,29 @@ null |10044 |Mingsen |F |1994-05-21
// end::sumWithoutSubquery
;

sumWithInnerAggregateSumOfSquares
schema::birth_date:ts|emp_no:i|first_name:s|gender:s|hire_date:ts|last_name:s|1:d|2:d
SELECT * FROM test_emp PIVOT (SUM_OF_SQUARES(salary) FOR languages IN (1, 2)) LIMIT 5;
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@costin costin Dec 3, 2020

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I'd like to see a test with multiple arguments that get folded into compound aggs, such as sum / min / max.

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@palesz palesz Dec 3, 2020

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Do you mean multiple aggregations inside the PIVOT? Currently there is a check that we can only have a single aggregation inside the PIVOT, so we can't have PIVOT(MIN(salary), MAX(salary) FOR ...).

This change only lifts the limitation on the type of that single aggregation within the PIVOT, so aggregations that are translated into an InnerAggregate will be allowed.

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@costin costin Dec 4, 2020

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Is there any validation or check for this (now that PostOptimizerTest has been removed)? this goes beyond the scope of this ticket so please raise a ticket if this functionality is missing or needs to be further investigated.

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@palesz palesz Dec 4, 2020

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The PostOptimizerTests checked that the type of the aggregation cannot be one that results in an InnerAggregate vs the number of the aggregations inside the PIVOT.

There is already a check in the LogicalPlanBuilder that only allows one aggregation inside the PIVOT:

elasticsearch/x-pack/plugin/sql/src/main/java/org/elasticsearch/xpack/sql/parser/LogicalPlanBuilder.java

Line 186 in 2f5ab81

throw new ParsingException(source(pivotClause.aggs), "PIVOT currently supports only one aggregation, found [{}]",

I cannot see it tested in unit tests, but it is there and works. Added: #65894

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@astefan astefan Dec 7, 2020

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This query fails for me in a REST test (using a REST client): it's only returning 3 rows, whereas it should have returned 5. We need to look into why the test passes and/or why the REST call with the same query fails. @palesz please, open an issue for this investigation.

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@palesz palesz Dec 7, 2020

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The JDBC integration tests fetch all the rows and follow the cursor (hence 5 rows shows up there). The tests are valid and successful, no issue there. Created #65982 to investigate this unexpected behaviour related to PIVOT+LIMIT.


birth_date | emp_no | first_name | gender | hire_date | last_name | 1 | 2
---------------------+---------------+---------------+---------------+------------------------+---------------+---------------+---------------
null |10041 |Uri |F |1989-11-12T00:00:00.000Z|Lenart |3.182652225E9 |null
null |10043 |Yishay |M |1990-10-20T00:00:00.000Z|Tzvieli |1.179304281E9 |null
null |10044 |Mingsen |F |1994-05-21T00:00:00.000Z|Casley |1.578313984E9 |null
1952-04-19T00:00:00Z |10009 |Sumant |F |1985-02-18T00:00:00.000Z|Peac |4.378998276E9 |null
1953-01-07T00:00:00Z |10067 |Claudi |M |1987-03-04T00:00:00.000Z|Stavenow |null |2.708577936E9
;

sumWithInnerAggregateKurtosis
schema::client_port:i|'OK':d|'Error':d
SELECT * FROM (SELECT client_port, status, bytes_in FROM logs WHERE client_port IS NULL) PIVOT (KURTOSIS(bytes_in) FOR status IN ('OK', 'Error')) LIMIT 10;

client_port | 'OK' | 'Error'
---------------+------------------+---------------
null |2.0016153277578916|NaN
;


averageWithOneValueAndMath
schema::languages:bt|'F':d
SELECT * FROM (SELECT languages, gender, salary FROM test_emp) PIVOT (ROUND(AVG(salary) / 2) FOR gender IN ('F'));
Expand All @@ -214,3 +237,4 @@ null |31070.0
4 |24646.0
5 |23353.0
;

14 changes: 0 additions & 14 deletions x-pack/plugin/sql/src/main/java/org/elasticsearch/xpack/sql/planner/Verifier.java
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Expand Up @@ -6,9 +6,7 @@
package org.elasticsearch.xpack.sql.planner;

import org.elasticsearch.xpack.ql.common.Failure;
import org.elasticsearch.xpack.ql.expression.function.aggregate.InnerAggregate;
import org.elasticsearch.xpack.sql.plan.physical.PhysicalPlan;
import org.elasticsearch.xpack.sql.plan.physical.PivotExec;
import org.elasticsearch.xpack.sql.plan.physical.Unexecutable;
import org.elasticsearch.xpack.sql.plan.physical.UnplannedExec;

Expand All @@ -32,22 +30,10 @@ static List<Failure> verifyMappingPlan(PhysicalPlan plan) {
}
});
});
// verify Pivot
checkInnerAggsPivot(plan, failures);

return failures;
}

private static void checkInnerAggsPivot(PhysicalPlan plan, List<Failure> failures) {
plan.forEachDown(p -> {
p.pivot().aggregates().forEach(agg -> agg.forEachDown(e -> {
if (e instanceof InnerAggregate) {
failures.add(fail(e, "Aggregation [{}] not supported (yet) by PIVOT", e.sourceText()));
}
}));
}, PivotExec.class);
}

static List<Failure> verifyExecutingPlan(PhysicalPlan plan) {
List<Failure> failures = new ArrayList<>();

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77 changes: 0 additions & 77 deletions ...gin/sql/src/test/java/org/elasticsearch/xpack/sql/planner/PostOptimizerVerifierTests.java
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