hudi-agent commented on code in PR #19853:
URL: https://github.com/apache/hudi/pull/19853#discussion_r3993635729
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hudi-spark-datasource/hudi-spark/src/main/scala/org/apache/spark/sql/hudi/command/procedures/HoodieProcedureFilterUtils.scala:
##########
@@ -389,6 +416,156 @@ object HoodieProcedureFilterUtils {
}
}
+ // Resolves a function not covered by the hardcoded table above via Spark's
own FunctionRegistry,
+ // then checks the result is actually usable outside a real query plan -
both steps a plain
+ // lookupFunction call skips or can't tell on its own. Anything that isn't
falls through to the
+ // existing rejection path instead of letting eval() throw silently.
+ private def resolveViaFunctionRegistry(unresolvedFunc: UnresolvedFunction,
sparkSession: SparkSession): Expression = {
+ Try {
+ val castedResolved =
applySparkAnalyzerCoercionRules(lookupBuiltin(unresolvedFunc, sparkSession))
+ // Checked here, on the raw wrapper, before unwrapping: a
RuntimeReplaceable wrapper's own
+ // declared input-type contract (nvl needing matching operand types,
split_part needing
+ // string/string/int) is otherwise discarded once unwrapped to a form
with a weaker or
+ // absent contract of its own.
+ if (!castedResolved.checkInputDataTypes().isSuccess) {
+ unresolvedFunc
+ } else {
+ val finalized = finalizeRegistryResolution(castedResolved)
+ if (isUsableOutsideQueryPlan(finalized)) finalized else unresolvedFunc
+ }
+ } match {
+ case Success(resolved) => resolved
+ case Failure(_) => unresolvedFunc
+ }
+ }
+
+ // Runs a handful of the analyzer's own coercion rules on a single
expression, the same rules
+ // lookupFunction skips: ImplicitTypeCasts for nodes declaring a real
input-type contract,
+ // FunctionArgumentConversion/ConcatCoercion/IfCoercion for the builtins
whose argument types get
+ // unified before the type check even sees them (concat(id, 'x') casts the
Int to String via
+ // ConcatCoercion in a real query; without it Concat.checkInputDataTypes
just fails). Order
+ // mirrors TypeCoercion's own rule list - ImplicitTypeCasts last, as a
catch-all. Anything not
+ // covered by one of these four passes through unchanged.
+ private def applySparkAnalyzerCoercionRules(expression: Expression):
Expression = {
+ val engine: TypeCoercionBase = if (SQLConf.get.ansiEnabled)
AnsiTypeCoercion else TypeCoercion
+ Seq(engine.FunctionArgumentConversion, engine.ConcatCoercion,
engine.IfCoercion, engine.ImplicitTypeCasts)
+ .foldLeft(expression) { (expr, rule) => rule.transform.applyOrElse(expr,
identity[Expression]) }
+ }
+
+ // Filter expressions only ever call plain builtins. A db-qualified or 3+
part name (db.func,
+ // catalog.db.func) can only be resolved by guessing which part is the real
function name - that
+ // risks matching an unrelated same-named function, so those are left
unresolved instead.
+ //
+ // Each argument gets widened before the lookup, not just the call's own
result afterward: an
+ // argument like ts + 1 (Long + Int) is still an unresolved Add at this
point, and the wrapper's
+ // checkInputDataTypes right after runs before pass three ever gets a chance
to widen it -
+ // sqrt(ts + 1) would fail that check for the same reason nvl(ts, 0) needed
pre-lookup widening,
+ // while the hardcoded abs(ts + 1) already works because pass three widens
its argument too, just
+ // later in the pipeline.
+ private def lookupBuiltin(unresolvedFunc: UnresolvedFunction, sparkSession:
SparkSession): Expression =
+ unresolvedFunc.nameParts match {
+ case Seq(funcName) =>
+ val widenedArguments =
unresolvedFunc.arguments.map(applyHudiWideningRules)
+ sparkSession.sessionState.functionRegistry
+ .lookupFunction(builtinFunctionIdentifier(funcName),
widenedArguments)
+ case _ => unresolvedFunc
+ }
+
+ // A session's function registry is a clone of FunctionRegistry.builtin,
keyed the same way
+ // builtins are actually registered - a bare name pre-4.2, but the fully
qualified
+ // system.builtin.<name> from 4.2 onward, where a session-level clone
(unlike the builtin
+ // singleton itself) stops auto-qualifying a bare name it's given and
asserts instead.
+ private def builtinFunctionIdentifier(funcName: String): FunctionIdentifier
= {
+ val bareIdentifier = FunctionIdentifier(funcName)
+ if (HoodieSparkUtils.gteqSpark4_2) {
+ // FunctionIdentifier only gained the catalog parameter from Spark 3.4
onward - this file
+ // still compiles against 3.3 too, where the case class has just
funcName/database, so a
+ // direct 3-arg call wouldn't compile there. Reached through reflection
instead, the same way
+ // the With handling below reaches classes that don't exist on every
targeted version.
+ bareIdentifier.getClass
+ .getConstructor(classOf[String], classOf[Option[_]],
classOf[Option[_]])
+ .newInstance(funcName, Some("builtin"), Some("system"))
+ .asInstanceOf[FunctionIdentifier]
+ } else {
+ bareIdentifier
+ }
+ }
+
+ // RuntimeReplaceable placeholders (nvl, ifnull, left, right, ...) need
substitution the analyzer
+ // normally performs but lookupFunction skips, and can themselves unwrap to
another
+ // RuntimeReplaceable (regexp_substr -> NullIf), so the unwrap runs to a
fixed point. Then widens
+ // numeric operands the same way pass three would - nvl(ts, 0) unwraps to
Coalesce(ts, 0), which
+ // needs the same widening the hardcoded coalesce(ts, 0) case gets - so a
registry function and
+ // its hardcoded-table equivalent agree on what counts as resolved.
+ //
+ // A replacement can itself be a With(child, defs) common-subexpression
wrapper from 4.0 onward
+ // (NullIf's, for instance) - Unevaluable like any other holder, so it needs
inlining here too or
+ // isUsableOutsideQueryPlan rejects it outright.
With/CommonExpressionDef/CommonExpressionRef
+ // don't exist before 4.0, so this goes by reflection rather than a direct
import; evaluating a
+ // filter once per row rather than once per query makes the dedup With
exists for irrelevant, so
+ // inlining each reference in place of its definition is exactly equivalent
to keeping it.
+ private def finalizeRegistryResolution(expression: Expression): Expression =
{
+ def unwrapReplacements(expr: Expression): Expression = {
+ val next = expr.transformUp {
+ case r: RuntimeReplaceable => r.replacement
+ case withExpr if isWithNode(withExpr) =>
inlineCommonExpressions(withExpr)
+ }
+ if (next.fastEquals(expr)) next else unwrapReplacements(next)
+ }
+ applyHudiWideningRules(unwrapReplacements(expression))
+ }
+
+ // With/CommonExpressionDef/CommonExpressionRef don't exist before Spark
4.0, so these go by
+ // reflection rather than a direct import to keep this file compiling across
the same 3.3-4.2
+ // range as the rest of it - the single place to update if the class name or
shape ever changes.
+ private def isWithNode(expression: Expression): Boolean =
expression.getClass.getSimpleName == "With"
+
+ private def inlineCommonExpressions(withExpr: Expression): Expression = {
Review Comment:
🤖 nit: the `x.getClass.getMethod("name").invoke(x)` pattern appears five
times here — a tiny `reflectField(expr: AnyRef, name: String)` helper would
make the With/CommonExpressionDef/CommonExpressionRef shape read at a glance.
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quality.</i></sub>
##########
hudi-spark-datasource/hudi-spark/src/test/scala/org/apache/spark/sql/hudi/procedure/TestHoodieProcedureFilterUtils.scala:
##########
@@ -555,4 +653,90 @@ class TestHoodieProcedureFilterUtils extends
HoodieSparkProcedureTestBase {
assertResult(Right(()))(validate("upper(name) = 'A1'"))
}
+
+ test("evaluateFilter resolves deeper nesting and more RuntimeReplaceable
functions") {
+ // Function resolution runs bottom-up, so a registry-resolved argument
(upper(name)) is
+ // already a real expression by the time its enclosing call (instr) is
checked - otherwise
+ // the outer call would look unresolved and get rejected even though both
functions
+ // individually resolve fine. This is the regression case for the
transformUp fix.
Review Comment:
🤖 nit: this PR adds `assertKeeps` for exactly this validate+keep pairing,
but the new tests from here down still spell the pair out by hand — could you
switch them over to `assertKeeps` for consistency?
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quality.</i></sub>
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