Mihai Budiu created CALCITE-6353:
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Summary: Optimization CoreRules.PROJECT_REDUCE_EXPRESSIONS crashes
while optimizing ARRAY_CONCAT expression
Key: CALCITE-6353
URL: https://issues.apache.org/jira/browse/CALCITE-6353
Project: Calcite
Issue Type: Bug
Components: core
Affects Versions: 1.36.0
Reporter: Mihai Budiu
The following RelOptRulesTest
{code:java}
@Test void testArrayConcat() {
final String sql = "select array_concat(ARRAY [1, 2], ARRAY [3, 4])";
sql(sql).withFactory(
t -> t.withOperatorTable(
opTab ->
SqlLibraryOperatorTableFactory.INSTANCE.getOperatorTable(
SqlLibrary.STANDARD, SqlLibrary.BIG_QUERY)))
.withRule(CoreRules.PROJECT_REDUCE_EXPRESSIONS)
.check();
}
{code}
crashes with the following stack trace:
{code:java}
java.lang.RuntimeException: While compiling [ARRAY_CONCAT(ARRAY(1, 2), ARRAY(3,
4))]
at org.apache.calcite.rex.RexExecutable.compile(RexExecutable.java:73)
at org.apache.calcite.rex.RexExecutable.<init>(RexExecutable.java:53)
at
org.apache.calcite.rex.RexExecutorImpl.reduce(RexExecutorImpl.java:145)
at
org.apache.calcite.rel.rules.ReduceExpressionsRule.reduceExpressionsInternal(ReduceExpressionsRule.java:774)
at
org.apache.calcite.rel.rules.ReduceExpressionsRule.reduceExpressions(ReduceExpressionsRule.java:714)
{code}
It seems that the generated code passed to Janino is invalid:
Line 10, Column 5: Assignment conversion not possible from type
"java.util.ArrayList" to type "java.lang.Object[]"
org.codehaus.commons.compiler.CompileException: Line 10, Column 5: Assignment
conversion not possible from type "java.util.ArrayList" to type
"java.lang.Object[]"
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