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ES|QL: Improve field resolution for FORK #128501

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Merged
merged 5 commits into from
May 28, 2025
Merged

ES|QL: Improve field resolution for FORK #128501

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f8f0478
Improve field resolution for FORK
ioanatia May 27, 2025
1474874
Request all fields when FORK is used
ioanatia May 27, 2025
40b9c7e
Merge branch 'main' into fork_field_resolution
ioanatia May 27, 2025
c2fa62f
Remove unused variable
ioanatia May 28, 2025
2e83b97
Merge branch 'main' into fork_field_resolution
ioanatia May 28, 2025
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6 changes: 0 additions & 6 deletions muted-tests.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -453,12 +453,6 @@ tests:
- class: org.elasticsearch.packaging.test.DockerTests
method: test121CanUseStackLoggingConfig
issue: https://github.com/elastic/elasticsearch/issues/128165
- class: org.elasticsearch.xpack.esql.session.IndexResolverFieldNamesTests
method: testForkFieldsWithKeepAfterFork
issue: https://github.com/elastic/elasticsearch/issues/128271
- class: org.elasticsearch.xpack.esql.session.IndexResolverFieldNamesTests
method: testForkWithStatsInAllBranches
issue: https://github.com/elastic/elasticsearch/issues/128272
- class: org.elasticsearch.packaging.test.DockerTests
method: test080ConfigurePasswordThroughEnvironmentVariableFile
issue: https://github.com/elastic/elasticsearch/issues/128075
Expand Down
31 changes: 5 additions & 26 deletions x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/session/EsqlSession.java
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Expand Up @@ -584,38 +584,17 @@ static PreAnalysisResult fieldNames(LogicalPlan parsed, Set<String> enrichPolicy
return result.withFieldNames(IndexResolver.ALL_FIELDS);
}

Holder<Boolean> projectAll = new Holder<>(false);
parsed.forEachExpressionDown(UnresolvedStar.class, us -> {// explicit "*" fields selection
if (projectAll.get()) {
return;
}
projectAll.set(true);
});

if (projectAll.get()) {
// TODO: Improve field resolution for FORK - right now we request all fields
if (parsed.anyMatch(p -> p instanceof Fork)) {
return result.withFieldNames(IndexResolver.ALL_FIELDS);
}

Holder<Boolean> projectAfterFork = new Holder<>(false);
Holder<Boolean> hasFork = new Holder<>(false);

parsed.forEachDown(plan -> {
Holder<Boolean> projectAll = new Holder<>(false);
parsed.forEachExpressionDown(UnresolvedStar.class, us -> {// explicit "*" fields selection
if (projectAll.get()) {
return;
}

if (hasFork.get() == false && shouldCollectReferencedFields(plan, inlinestatsAggs)) {
projectAfterFork.set(true);
}

if (plan instanceof Fork fork && projectAfterFork.get() == false) {
hasFork.set(true);
fork.children().forEach(child -> {
if (child.anyMatch(p -> shouldCollectReferencedFields(p, inlinestatsAggs)) == false) {
projectAll.set(true);
}
});
}
projectAll.set(true);
});

if (projectAll.get()) {
Expand Down
54 changes: 15 additions & 39 deletions ...esql/src/test/java/org/elasticsearch/xpack/esql/session/IndexResolverFieldNamesTests.java
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Expand Up @@ -2009,21 +2009,21 @@ public void testForkFieldsWithKeepAfterFork() {
(WHERE d > 1000 AND e == "aaa" | EVAL c = a + 200)
| WHERE x > y
| KEEP a, b, c, d, x
""", Set.of("a", "a.*", "c", "c.*", "d", "d.*", "e", "e.*", "x", "x.*", "y", "y.*"));
""", ALL_FIELDS);
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@ioanatia ioanatia May 27, 2025 •
edited
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technically here what we had before was better
what we do now is that if we detect that a FORK branch requires all fields, we don't look further and we end up requiring all fields from field caps.
I think this is fine for now - we can look into improving this later - but at least the current implementation is less error prone than before.

}

public void testForkFieldsWithKeepBeforeFork() {
assumeTrue("FORK available as snapshot only", EsqlCapabilities.Cap.FORK.isEnabled());

assertFieldNames("""
FROM test
| KEEP a, b, c, d, x
| KEEP a, b, c, d, x, y
| WHERE a > 2000
| EVAL b = a + 100
| FORK (WHERE c > 1 AND a < 10000 | EVAL d = a + 500)
(WHERE d > 1000 AND e == "aaa" | EVAL c = a + 200)
| WHERE x > y
""", Set.of("a", "a.*", "b", "b.*", "c", "c.*", "d", "d.*", "e", "e.*", "x", "x.*", "y", "y.*"));
""", ALL_FIELDS);
}

public void testForkFieldsWithNoProjection() {
Expand Down Expand Up @@ -2056,41 +2056,17 @@ public void testForkFieldsWithEnrichAndLookupJoins() {
assumeTrue("FORK available as snapshot only", EsqlCapabilities.Cap.FORK.isEnabled());
assumeTrue("LOOKUP JOIN available as snapshot only", EsqlCapabilities.Cap.JOIN_LOOKUP_V12.isEnabled());

assertFieldNames(
"""
FROM test
| KEEP a, b, abc, def, z, xyz
| ENRICH enrich_policy ON abc
| EVAL b = a + 100
| LOOKUP JOIN my_lookup_index ON def
| FORK (WHERE c > 1 AND a < 10000 | EVAL d = a + 500)
(STATS x = count(*), y=min(z))
| LOOKUP JOIN my_lookup_index ON xyz
| WHERE x > y OR _fork == "fork1"
""",
Set.of(
"x",
"y",
"_fork",
"a",
"c",
"abc",
"b",
"def",
"z",
"xyz",
"def.*",
"_fork.*",
"y.*",
"x.*",
"xyz.*",
"z.*",
"abc.*",
"a.*",
"c.*",
"b.*"
)
);
assertFieldNames("""
FROM test
| KEEP a, b, abc, def, z, xyz
| ENRICH enrich_policy ON abc
| EVAL b = a + 100
| LOOKUP JOIN my_lookup_index ON def
| FORK (WHERE c > 1 AND a < 10000 | EVAL d = a + 500)
(STATS x = count(*), y=min(z))
| LOOKUP JOIN my_lookup_index ON xyz
| WHERE x > y OR _fork == "fork1"
""", ALL_FIELDS);
}

public void testForkWithStatsInAllBranches() {
Expand All @@ -2104,7 +2080,7 @@ public void testForkWithStatsInAllBranches() {
(EVAL z = a * b | STATS m = max(z))
(STATS x = count(*), y=min(z))
| WHERE x > y
""", Set.of("a", "a.*", "b", "b.*", "c", "c.*", "z", "z.*"));
""", ALL_FIELDS);
}

public void testForkWithStatsAndWhere() {
Expand Down