vladimirg-db commented on code in PR #53570:
URL: https://github.com/apache/spark/pull/53570#discussion_r2685556320
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala:
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@@ -78,10 +79,17 @@ trait FunctionRegistryBase[T] {
/* Create or replace a temporary function. */
final def createOrReplaceTempFunction(
name: String, builder: FunctionBuilder, source: String): Unit = {
- registerFunction(
- FunctionIdentifier(name),
- builder,
- source)
+ // Internal functions (source="internal") are NOT qualified with
+ // CatalogManager.SESSION_NAMESPACE database because they use a separate
+ // internal registry and are resolved differently
+ val identifier = if (source == "internal") {
+ FunctionIdentifier(name)
+ } else {
+ // Regular temporary functions are qualified with
CatalogManager.SESSION_NAMESPACE
+ // to enable coexistence with builtin functions of the same name
+ FunctionIdentifier(name, Some(CatalogManager.SESSION_NAMESPACE))
Review Comment:
`ResolverGuard`'s `checkUnresolvedFunction` also depends on the fact that
built-in functions have one-part name.
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