Github user hvanhovell commented on a diff in the pull request:
https://github.com/apache/spark/pull/14482#discussion_r73475935
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/rules.scala
---
@@ -154,6 +274,21 @@ private[sql] case class PreWriteCheck(conf: SQLConf,
catalog: SessionCatalog)
def apply(plan: LogicalPlan): Unit = {
plan.foreach {
+ case c @ CreateTable(tableDesc, mode, query) if c.resolved =>
+ // Since we are saving table metadata to metastore, we should make
sure the table name
+ // and database name don't break some common restrictions, e.g.
special chars except
+ // underscore are not allowed.
+ val pattern = Pattern.compile("[\\w_]+")
--- End diff --
Compiling a pattern can be expensive and the `Pattern` produced is
reusable; that is all.
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