Yu Xu created CALCITE-7187:
------------------------------
Summary: Java UDF byte/Byte array can not mapping to VARBINARY
Key: CALCITE-7187
URL: https://issues.apache.org/jira/browse/CALCITE-7187
Project: Calcite
Issue Type: Bug
Components: core
Affects Versions: 1.40.0
Reporter: Yu Xu
When we customize a Java UDF with a return type of Byte/byte[], for example:
{code:java}
public static class CharacterArrayFunction {
public static byte[] eval(String s) {
if (s == null) {
return null;
}
try {
return s.getBytes(StandardCharsets.UTF_8);
} catch (Exception e) {
return null;
}
}
} {code}
After codegen, the execution may encounter the following compatibility issues.
Currently, Calcite is not compatible with byte/Byte[] to ByteString:
{code:java}
Caused by: org.codehaus.commons.compiler.CompileException: Line 22, Column 65:
Cannot cast "byte[]" to "org.apache.calcite.avatica.util.ByteString" at
org.codehaus.janino.UnitCompiler.compileError(UnitCompiler.java:13228) at
org.codehaus.janino.UnitCompiler.compileGet2(UnitCompiler.java:5311) at
org.codehaus.janino.UnitCompiler.access$8800(UnitCompiler.java:240) at
org.codehaus.janino.UnitCompiler$16.visitCast(UnitCompiler.java:4819) at
org.codehaus.janino.UnitCompiler$16.visitCast(UnitCompiler.java:4800) at
org.codehaus.janino.Java$Cast.accept(Java.java:5283) at
org.codehaus.janino.UnitCompiler.compileGet(UnitCompiler.java:4800) at
org.codehaus.janino.UnitCompiler.compileGetValue(UnitCompiler.java:5945) at
org.codehaus.janino.UnitCompiler.compile2(UnitCompiler.java:2897) at
org.codehaus.janino.UnitCompiler.access$2800(UnitCompiler.java:240) at
org.codehaus.janino.UnitCompiler$6.visitReturnStatement(UnitCompiler.java:1594)
at
org.codehaus.janino.UnitCompiler$6.visitReturnStatement(UnitCompiler.java:1579)
at org.codehaus.janino.Java$ReturnStatement.accept(Java.java:3888) at
org.codehaus.janino.UnitCompiler.compile(UnitCompiler.java:1579) at
org.codehaus.janino.UnitCompiler.compileStatements(UnitCompiler.java:1665)
{code}
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