Major Description
When executing a query like the following:
select s."cust_id", sum(s."prod_id"), sum(s."prod_id_1"), ......, sum(s."prod_id_194"), sum(s."prod_id_195"), sum(s."prod_id_196"), sum(s."prod_id_197"), sum(s."prod_id_198"), sum(s."prod_id_199")
from "foodmart"."table" as s group by s."cust_id"
Calcite reports exception as followed:
Exception in thread "main" java.sql.SQLException: Error while executing SQL
Error while compiling generated Java code:
public static class Record200_0 implements java.io.Serializable {
.....
Caused by: org.codehaus.janino.JaninoRuntimeException: Baz$2.apply(): Operand stack overflow at offset 1195
at org.codehaus.janino.CodeContext.flowAnalysis(CodeContext.java:490)
Tracking down the error in EnumerableAggregate, I found that this is because Calcite generates a class with a constructor which has as many parameters as the aggregated fields, and the auto-generated java code causes error while being compiled.
There is not a certain number of constructor number, since it seems the longest length of constructor parameter also relates to the java type of the parameters.