Github user vinodkc commented on a diff in the pull request:
https://github.com/apache/spark/pull/7015#discussion_r33558094
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/AbstractSparkSQLParser.scala
---
@@ -30,12 +30,14 @@ private[sql] abstract class AbstractSparkSQLParser
def parse(input: String): LogicalPlan = {
// Initialize the Keywords.
- lexical.initialize(reservedWords)
+ initLexical
phrase(start)(new lexical.Scanner(input)) match {
case Success(plan, _) => plan
case failureOrError => sys.error(failureOrError.toString)
}
}
+ /* One time initialization of lexical.This avoid reinitialization of
lexical in parse method */
+ protected lazy val initLexical: Unit = lexical.initialize(reservedWords)
--- End diff --
'reservedWords' is generated using reflection. So during non-lazy
'lexical' initialization in constructor, method call to collect reservedWords
will fail as the object construction is still not over.
Coud you suggest any other approach?
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