srielau commented on code in PR #49445:
URL: https://github.com/apache/spark/pull/49445#discussion_r1913307900
##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/ResolveCatalogs.scala:
##########
@@ -73,28 +93,39 @@ class ResolveCatalogs(val catalogManager: CatalogManager)
}
}
- private def resolveVariableName(nameParts: Seq[String]): ResolvedIdentifier
= {
- def ident: Identifier =
Identifier.of(Array(CatalogManager.SESSION_NAMESPACE), nameParts.last)
- if (nameParts.length == 1) {
+ private def resolveCreateVariableName(nameParts: Seq[String]):
ResolvedIdentifier = {
+ val ident = catalogManager.scriptingLocalVariableManager
+ .getOrElse(catalogManager.tempVariableManager)
+ .createIdentifier(nameParts.last)
+
+ resolveVariableName(nameParts, ident)
+ }
+
+ private def resolveDropVariableName(nameParts: Seq[String]):
ResolvedIdentifier = {
+ // Only session variables can be dropped, so
catalogManager.scriptingLocalVariableManager
+ // is not checked in the case of DropVariable.
+ val ident =
catalogManager.tempVariableManager.createIdentifier(nameParts.last)
+ resolveVariableName(nameParts, ident)
+ }
+
+ private def resolveVariableName(
+ nameParts: Seq[String],
+ ident: Identifier): ResolvedIdentifier = nameParts.length match {
+ case 1 => ResolvedIdentifier(FakeSystemCatalog, ident)
+
+ // On declare variable, local variables support only unqualified names.
+ // On drop variable, local variables are not supported at all.
+ case 2 if
nameParts.head.equalsIgnoreCase(CatalogManager.SESSION_NAMESPACE) =>
ResolvedIdentifier(FakeSystemCatalog, ident)
- } else if (nameParts.length == 2) {
- if (nameParts.head.equalsIgnoreCase(CatalogManager.SESSION_NAMESPACE)) {
- ResolvedIdentifier(FakeSystemCatalog, ident)
- } else {
- throw QueryCompilationErrors.unresolvedVariableError(
- nameParts, Seq(CatalogManager.SYSTEM_CATALOG_NAME,
CatalogManager.SESSION_NAMESPACE))
- }
- } else if (nameParts.length == 3) {
- if (nameParts(0).equalsIgnoreCase(CatalogManager.SYSTEM_CATALOG_NAME) &&
- nameParts(1).equalsIgnoreCase(CatalogManager.SESSION_NAMESPACE)) {
- ResolvedIdentifier(FakeSystemCatalog, ident)
- } else {
- throw QueryCompilationErrors.unresolvedVariableError(
- nameParts, Seq(CatalogManager.SYSTEM_CATALOG_NAME,
CatalogManager.SESSION_NAMESPACE))
- }
- } else {
+
+ // When there are 3 nameParts the variable must be a fully qualified
session variable
+ // i.e. "system.session.<varName>"
+ case 3 if
nameParts(0).equalsIgnoreCase(CatalogManager.SYSTEM_CATALOG_NAME) &&
+ nameParts(1).equalsIgnoreCase(CatalogManager.SESSION_NAMESPACE) =>
+ ResolvedIdentifier(FakeSystemCatalog, ident)
+
+ case _ =>
throw QueryCompilationErrors.unresolvedVariableError(
- nameParts, Seq(CatalogManager.SYSTEM_CATALOG_NAME,
CatalogManager.SESSION_NAMESPACE))
- }
+ nameParts, Seq(CatalogManager.SYSTEM_CATALOG_NAME,
ident.namespace().head))
Review Comment:
Local variables can only be qualified by a label. Label's themselves are non
qualified.
parameters can be qualified by the procedure name. Procedure names can be
qualified.
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