danny0405 commented on a change in pull request #1381: [CALCITE-3245]
CompileException in Janino when a query contains a division between a Double
and a BigDecimal
URL: https://github.com/apache/calcite/pull/1381#discussion_r314602262
##########
File path:
core/src/main/java/org/apache/calcite/adapter/enumerable/RexImpTable.java
##########
@@ -2278,9 +2278,12 @@ public Expression implement(
final Type returnType =
translator.typeFactory.getJavaClass(call.getType());
- return Types.castIfNecessary(returnType,
- Expressions.makeBinary(expressionType, expressions.get(0),
- expressions.get(1)));
+ final Expression result = Expressions.makeBinary(expressionType,
+ expressions.get(0), expressions.get(1));
+ if (returnType == BigDecimal.class) {
+ return RexToLixTranslator.convert(result, returnType);
+ }
+ return Types.castIfNecessary(returnType, result);
}
Review comment:
I don't think `RexToLixTranslator.convert`,
`RexToLixTranslator.translateCast` and `Types.castIfNecessary` have any
function overlaps, the first 2 are purely about the expression translate, they
just produce the expression you want, but `Types.castIfNecessary` contains
logic to decide if the is any necessity to do the cast, that is why i suggest
you to move the logic.
If you think i'm wrong or other people can do it better, feel free to ignore
this.
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