**Build scan:**
https://gradle-enterprise.elastic.co/s/fvg2knbi424p4/tests/:x-pack:plugin:esql:test/org.elasticsearch.xpack.esql.expression.function.scalar.conditional.LeastTests/testEvaluateInManyThreads%20%7BTestCase=(%3Ckeyword%3E,%20%3Ckeyword%3E,%20%3Ckeyword%3E,%20%3Ckeyword%3E,%20%3Ckeyword%3E,%20%3Ckeyword%3E,%20%3Ckeyword%3E)%20null%20in%204%7D
**Reproduction lines:**
```
gradlew ':x-pack:plugin:esql:test' --tests "org.elasticsearch.xpack.esql.expression.function.scalar.conditional.GreatestTests.testEvaluateInManyThreads {TestCase=(<mv_integer>) null in 0}" -Dtests.seed=BCCD8A2AFCEA37CB -Dtests.locale=zh -Dtests.timezone=Europe/Guernsey -Druntime.java=21

gradlew ':x-pack:plugin:esql:test' --tests "org.elasticsearch.xpack.esql.expression.function.scalar.conditional.LeastTests.testEvaluateInManyThreads {TestCase=(<keyword>, <keyword>, <keyword>, <keyword>, <keyword>, <keyword>, <keyword>) null in 4}" -Dtests.seed=BCCD8A2AFCEA37CB -Dtests.locale=lt -Dtests.timezone=Indian/Christmas -Druntime.java=21

 gradlew ':x-pack:plugin:esql:test' --tests "org.elasticsearch.xpack.esql.expression.function.scalar.conditional.GreatestTests.testEvaluateInManyThreads {TestCase=(<mv_integer>) null in 0}" -Dtests.seed=BCCD8A2AFCEA37CB -Dtests.locale=zh -Dtests.timezone=Europe/Guernsey -Druntime.java=21
```

**Applicable branches:**
main

**Reproduces locally?:**
Yes

**Failure history:**
https://gradle-enterprise.elastic.co/scans/tests?tests.container=org.elasticsearch.xpack.esql.expression.function.scalar.conditional.LeastTests&tests.test=testEvaluateInManyThreads%20%7BTestCase%3D(%3Ckeyword%3E,%20%3Ckeyword%3E,%20%3Ckeyword%3E,%20%3Ckeyword%3E,%20%3Ckeyword%3E,%20%3Ckeyword%3E,%20%3Ckeyword%3E)%20null%20in%204%7D


**Failure excerpt:**
```
org.elasticsearch.xpack.esql.expression.function.scalar.conditional.GreatestTests > classMethod FAILED
    java.lang.AssertionError: expected:<[boolean, double, integer, ip, keyword, long, text, version]> but was:<[integer]>


```
x-pack/plugin/esql/src/test/java/org/elasticsearch/xpack/esql/expression/function/AbstractFunctionTestCase.java
}
    /**
     * Evaluates a {@link Block} of values, all copied from the input pattern,
     * read from an intermediate operator, using the
     * {@link CrankyCircuitBreakerService} which fails randomly.
     * <p>
     *     Note that this'll sometimes be a {@link Vector} of values if the
     *     input pattern contained only a single value.
     * </p>
     */
    public final void testCrankyEvaluateBlockWithoutNullsFloating() {
        assumeTrue("sometimes the cranky breaker silences warnings, just skip these cases", testCase.getExpectedWarnings() == null);
        try {
            testEvaluateBlock(driverContext().blockFactory(), crankyContext(), false, true);
        } catch (CircuitBreakingException ex) {
            assertThat(ex.getMessage(), equalTo(CrankyCircuitBreakerService.ERROR_MESSAGE));
        }
    }
    /**
     * Evaluates a {@link Block} of values, all copied from the input pattern with
     * some null values inserted between, read directly from the page,
     * using the {@link CrankyCircuitBreakerService} which fails randomly.
     */
    public final void testCrankyEvaluateBlockWithNulls() {
        assumeTrue("sometimes the cranky breaker silences warnings, just skip these cases", testCase.getExpectedWarnings() == null);
        try {
            testEvaluateBlock(driverContext().blockFactory(), crankyContext(), true, false);
        } catch (CircuitBreakingException ex) {
            assertThat(ex.getMessage(), equalTo(CrankyCircuitBreakerService.ERROR_MESSAGE));
        }