[BUG] Exception thrown on CASE WHEN where ELSE literal value is non-numeric

## Environment
- DocumentDB JDBC driver version: 1.4.4
- DocumentDB server version: n/a
- OS: [e.g. MacOS Big Sur 11.5.1, Windows 10 64-bit]: n/a
- BI Tool or client name: n/a
- BI Tool or client version: n/a
- Java version (if known): n/a

---

## Problem Description
1. Steps to reproduce:

```SQL
select c1, coalesce(c1, {ts '1899-12-28 00:00:00'}) as c2
from
(
select CAST(NULL as TIMESTAMP) as c1
from sales.emp
)
group by c1
```

3. Expected behaviour:

`1899-12-28 00:00:00`

5. Actual behaviour:

Exception thrown:
`cannot convert TIMESTAMP literal to class java.math.BigDecimal java.lang.AssertionError: cannot convert TIMESTAMP literal to class java.math.BigDecimal`

7. Error message/stack trace:

```
cannot convert TIMESTAMP literal to class java.math.BigDecimal
java.lang.AssertionError: cannot convert TIMESTAMP literal to class java.math.BigDecimal
at org.apache.calcite.rex.RexLiteral.getValueAs(RexLiteral.java:1143)
at org.apache.calcite.rel.rules.ProjectAggregateMergeRule$1.visitCall(ProjectAggregateMergeRule.java:111)
at org.apache.calcite.rel.rules.ProjectAggregateMergeRule$1.visitCall(ProjectAggregateMergeRule.java:91)
at org.apache.calcite.rex.RexCall.accept(RexCall.java:189)
at org.apache.calcite.rex.RexVisitor.visitList(RexVisitor.java:63)
at org.apache.calcite.rex.RexVisitor.visitList(RexVisitor.java:71)
at org.apache.calcite.rel.rules.ProjectAggregateMergeRule.onMatch(ProjectAggregateMergeRule.java:132)
at org.apache.calcite.plan.AbstractRelOptPlanner.fireRule(AbstractRelOptPlanner.java:337)
at org.apache.calcite.plan.hep.HepPlanner.applyRule(HepPlanner.java:556)
at org.apache.calcite.plan.hep.HepPlanner.applyRules(HepPlanner.java:420)
at org.apache.calcite.plan.hep.HepPlanner.executeRuleInstance(HepPlanner.java:243)
at org.apache.calcite.plan.hep.HepInstruction$RuleInstance$State.execute(HepInstruction.java:178)
at org.apache.calcite.plan.hep.HepPlanner.lambda$executeProgram$0(HepPlanner.java:211)
at com.google.common.collect.ImmutableList.forEach(ImmutableList.java:405)
at org.apache.calcite.plan.hep.HepPlanner.executeProgram(HepPlanner.java:210)
at org.apache.calcite.plan.hep.HepProgram$State.execute(HepProgram.java:118)
at org.apache.calcite.plan.hep.HepPlanner.executeProgram(HepPlanner.java:205)
at org.apache.calcite.plan.hep.HepPlanner.findBestExp(HepPlanner.java:191)
at org.apache.calcite.test.RelOptFixture.checkPlanning(RelOptFixture.java:378)
at org.apache.calcite.test.RelOptFixture.check(RelOptFixture.java:330)
at org.apache.calcite.test.RelOptFixture.checkUnchanged(RelOptFixture.java:322)
at org.apache.calcite.test.RelOptRulesTest.testProjectAggregateMergeNonNumericLiteral(RelOptRulesTest.java:4810)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:725)
at org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60)
at org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:131)
at org.junit.jupiter.engine.extension.TimeoutInvocation.proceed(TimeoutInvocation.java:46)
at org.junit.jupiter.engine.extension.TimeoutExtension.intercept(TimeoutExtension.java:149)
at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestableMethod(TimeoutExtension.java:140)
at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestMethod(TimeoutExtension.java:84)
at org.junit.jupiter.engine.execution.ExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(ExecutableInvoker.java:115)
at org.junit.jupiter.engine.execution.ExecutableInvoker.lambda$invoke$0(ExecutableInvoker.java:105)
at org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:106)
at org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed(InvocationInterceptorChain.java:64)
at org.junit.jupiter.engine.execution.InvocationInterceptorChain.chainAndInvoke(InvocationInterceptorChain.java:45)
at org.junit.jupiter.engine.execution.InvocationInterceptorChain.invoke(InvocationInterceptorChain.java:37)
at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:104)
at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:98)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeTestMethod$7(TestMethodTestDescriptor.java:214)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeTestMethod(TestMethodTestDescriptor.java:210)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:135)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:66)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:151)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141)
at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)
at org.junit.platform.engine.support.hierarchical.ForkJoinPoolHierarchicalTestExecutorService$ExclusiveTask.compute(ForkJoinPoolHierarchicalTestExecutorService.java:185)
at org.junit.platform.engine.support.hierarchical.ForkJoinPoolHierarchicalTestExecutorService.invokeAll(ForkJoinPoolHierarchicalTestExecutorService.java:129)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:155)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141)
at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)
at org.junit.platform.engine.support.hierarchical.ForkJoinPoolHierarchicalTestExecutorService$ExclusiveTask.compute(ForkJoinPoolHierarchicalTestExecutorService.java:185)
at org.junit.platform.engine.support.hierarchical.ForkJoinPoolHierarchicalTestExecutorService.invokeAll(ForkJoinPoolHierarchicalTestExecutorService.java:129)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:155)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141)
at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)
at org.junit.platform.engine.support.hierarchical.ForkJoinPoolHierarchicalTestExecutorService$ExclusiveTask.compute(ForkJoinPoolHierarchicalTestExecutorService.java:185)
at java.base/java.util.concurrent.RecursiveAction.exec(RecursiveAction.java:194)
at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:373)
at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1182)
at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1655)
at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1622)
at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:165)
```

9. Any other details that can be helpful:

This issue resolution is in progress as of the creation of this issue.

[Calcite Issue](https://issues.apache.org/jira/browse/CALCITE-5483)
[Calcite PR](https://github.com/apache/calcite/pull/3038)

The Pull Requests will notify you of new versions for Calcite dependency. You'll need to check to see if the issue and PR are merged into that version. On release of the fix from Calcite, update the dependency version for Calcite.

E.g. if fixed version is `1.34.0`
`implementation group: 'org.apache.calcite', name: 'calcite-core', version: '1.34.0'`

---

## Screenshots
n/a

---

## JDBC log
n/a

Start by reviewing the linked Calcite issue CALCITE-5483 and PR 3038, then check whether the fix is included in a released Calcite version used by the driver. Update the Calcite dependency when the fix is released and verify the reproduced SQL no longer throws the reported exception.

Written by the indexing model from the issue text.