pan3793 commented on code in PR #56263:
URL: https://github.com/apache/spark/pull/56263#discussion_r3339177327
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sql/core/src/main/scala/org/apache/spark/sql/jdbc/JdbcDialects.scala:
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@@ -402,9 +402,12 @@ abstract class JdbcDialect extends Serializable with
Logging {
private[jdbc] class JDBCSQLBuilder extends V2ExpressionSQLBuilder {
// SPARK-53454: Produce portable SQL for AlwaysTrue/AlwaysFalse predicates.
// Some databases (Oracle, DB2) do not support bare TRUE/FALSE in WHERE
clauses.
+ // The result is parenthesized so it stays valid when nested as an operand
of a
+ // larger expression (e.g. `(`a` = 3) = (1 = 1)` or `(1 = 1) IS NOT
NULL`), not
Review Comment:
nit: weird backtick pair
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