Yifeng-Wang commented on code in PR #9107:
URL: https://github.com/apache/incubator-gluten/pull/9107#discussion_r2453798522
##########
gluten-substrait/src/main/scala/org/apache/gluten/expression/ExpressionConverter.scala:
##########
@@ -144,6 +144,66 @@ object ExpressionConverter extends SQLConfHelper with
Logging {
DecimalArithmeticExpressionTransformer(substraitName, leftChild,
rightChild, resultType, b)
}
+ private def replaceStaticInvokeWithExpressionTransformer(
+ i: StaticInvoke,
+ attributeSeq: Seq[Attribute],
+ expressionsMap: Map[Class[_], String]): ExpressionTransformer = {
+ def validateAndTransform(
+ exprName: String,
+ childTransformers: => Seq[ExpressionTransformer]):
ExpressionTransformer = {
+ if (!BackendsApiManager.getValidatorApiInstance.doExprValidate(exprName,
i)) {
+ throw new GlutenNotSupportException(
+ s"Not supported to map current ${i.getClass} call on function:
${i.functionName}.")
+ }
+ GenericExpressionTransformer(exprName, childTransformers, i)
+ }
+
+ i.functionName match {
+ case "encode" | "decode" if i.objectName.endsWith("UrlCodec") =>
+ validateAndTransform(
+ "url_" + i.functionName,
+ Seq(replaceWithExpressionTransformer0(i.arguments.head,
attributeSeq, expressionsMap))
+ )
+
+ case "isLuhnNumber" =>
+ validateAndTransform(
+ ExpressionNames.LUHN_CHECK,
+ Seq(replaceWithExpressionTransformer0(i.arguments.head,
attributeSeq, expressionsMap))
+ )
+
+ case "encode" | "decode" if i.objectName.endsWith("Base64") =>
+ if
(!BackendsApiManager.getValidatorApiInstance.doExprValidate(ExpressionNames.BASE64,
i)) {
+ throw new GlutenNotSupportException(
+ s"Not supported to map current ${i.getClass} call on function:
${i.functionName}.")
+ }
Review Comment:
Hi rui-mo, thanks for mentioning this. Apologize for such a long context
within this PR.
This `doExprValidate` call on validator instance was added deliberately to
ensure backend actually supports.
Technically this was from my earlier findings (if you scroll up a bit, on
Mar 26) , and currently it ensures that:
- An explicit call on `doExprValidate`.
- `CH_BLACKLIST_SCALAR_FUNCTION` is looked through during e.g.,
CHValidatorApi::doExprValidate so that the functions which are only supported
at Velox side, won't cause "Unknown function parser" for clickhouse BE(in CI
tests).
- Intercept at Gluten with `GlutenNotSupportException`, instead of sending
to actual unsupported (ClickHouse) backend.
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