davidm-db commented on code in PR #49445:
URL: https://github.com/apache/spark/pull/49445#discussion_r1918845297
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/ColumnResolutionHelper.scala:
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@@ -251,9 +251,19 @@ trait ColumnResolutionHelper extends Logging with
DataTypeErrorsBase {
}
}
+ /**
+ * Look up variable by nameParts. If in SQL Script, first check local
variables,
+ * if not found fall back to session variables,
+ * unless in EXECUTE IMMEDIATE or specified otherwise by
sessionVariablesOnlyOpt.
+ * @param nameParts NameParts of the variable.
+ * @param sessionVariablesOnlyOpt If None - include local variables unless
in EXECUTE IMMEDIATE.
+ * If Some(false) - include local variables.
+ * If Some(true) - exclude local variables.
+ * @return Reference to the variable.
+ */
def lookupVariable(
nameParts: Seq[String],
- sessionVariablesOnly: Boolean = false): Option[VariableReference] = {
+ sessionVariablesOnlyOpt: Option[Boolean] = None):
Option[VariableReference] = {
Review Comment:
Yup, my first thought as well. It's not pure use of Option, rather
`quick/hacky` way to have 3 states.
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