Rodrigo Rueda created CALCITE-6593:
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Summary: NPE when joining tables with many fields and one table is
empty
Key: CALCITE-6593
URL: https://issues.apache.org/jira/browse/CALCITE-6593
Project: Calcite
Issue Type: Bug
Components: core
Affects Versions: 1.38.0
Reporter: Rodrigo Rueda
Fix For: 1.38.0
The fix for CALCITE-3094 started generating the following code for a join when
the resulting field count is >= 100.
{code:java}
public Object[] apply(Object[] left, Object[] right) {
Object[] outputArray = new Object[102];
System.arraycopy(left, 0, outputArray, 0, 94);
System.arraycopy(right, 0, outputArray, 94, 8);
return outputArray;
} {code}
But left or right might be null if one of the sides of the join is empty, which
leads to a NPE:
{code:java}
java.lang.NullPointerException
at java.base/java.lang.System.arraycopy(Native Method)
at Baz$3.apply(Unknown Source)
at Baz$3.apply(Unknown Source)
at Baz$3.apply(Unknown Source)
at
org.apache.calcite.linq4j.EnumerableDefaults$12$1.current(EnumerableDefaults.java:2078)
at Baz$4$1.current(Unknown Source) {code}
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