cloud-fan commented on code in PR #38864:
URL: https://github.com/apache/spark/pull/38864#discussion_r1045673103
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sql/catalyst/src/main/antlr4/org/apache/spark/sql/catalyst/parser/SqlBaseParser.g4:
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@@ -40,6 +40,11 @@ options { tokenVocab = SqlBaseLexer; }
* When true, double quoted literals are identifiers rather than STRINGs.
*/
public boolean double_quoted_identifiers = false;
+
+ /**
+ * When true, identifiers that begin from `:` are considered as named
parameters.
+ */
+ public boolean parameters_enabled = false;
Review Comment:
This is a new SQL syntax, it won't break any existing queries. Do we really
need a feature flag?
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