[8.18] ESQL: Fix FieldAttribute name usage in InferNonNullAggConstraint (#128910) #129272
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…stic#128910) * Fix InferNonNullAggConstraint with union types * Begin fixing LucenePushdownPredicates with union types * Introduce a dedicated wrapper record FieldName to be used where field names are really required. The fixes consist of using FieldAttribute.fieldName() instead of .name() or .field().name(). .name() can be some temporary string unrelated to the actual name of the Lucene index field, whereas .field().name() doesn't know about parent fields; .fieldName() gives the full field name (from the root of the document). The biggest offender of such misuse is SearchStats; make this always require a FieldName, not a String - and make FieldAttribute#fieldName handily return an instance of FieldName so users of SearchStats don't accidentally use the return value of FieldAttribute#name. (cherry picked from commit 0850bd7) # Conflicts: # x-pack/plugin/esql/qa/testFixtures/src/main/java/org/elasticsearch/xpack/esql/EsqlTestUtils.java # x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/analysis/Analyzer.java # x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/optimizer/rules/physical/local/LucenePushdownPredicates.java # x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/planner/EsPhysicalOperationProviders.java # x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/stats/SearchContextStats.java # x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/stats/SearchStats.java # x-pack/plugin/esql/src/test/java/org/elasticsearch/xpack/esql/optimizer/LocalLogicalPlanOptimizerTests.java # x-pack/plugin/esql/src/test/java/org/elasticsearch/xpack/esql/optimizer/LocalPhysicalPlanOptimizerTests.java # x-pack/plugin/esql/src/test/java/org/elasticsearch/xpack/esql/optimizer/PhysicalPlanOptimizerTests.java # x-pack/plugin/esql/src/test/java/org/elasticsearch/xpack/esql/planner/TestPhysicalOperationProviders.java # x-pack/plugin/esql/src/test/java/org/elasticsearch/xpack/esql/stats/DisabledSearchStats.java
alex-spies
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This will backport the following commits from
mainto8.18: