Github user alexliu68 commented on a diff in the pull request:
https://github.com/apache/spark/pull/3941#discussion_r22755728
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala ---
@@ -178,10 +178,23 @@ class SqlParser extends AbstractSparkSQLParser {
joinedRelation | relationFactor
protected lazy val relationFactor: Parser[LogicalPlan] =
- ( ident ~ (opt(AS) ~> opt(ident)) ^^ {
- case tableName ~ alias => UnresolvedRelation(None, tableName,
alias)
+ (
+ ident ~ ("." ~> ident) ~ ("." ~> ident) ~ ("." ~> ident) ~ (opt(AS)
~> opt(ident)) ^^ {
+ case reserveName1 ~ reserveName2 ~ dbName ~ tableName ~ alias =>
+ UnresolvedRelation(IndexedSeq(tableName, dbName, reserveName2,
reserveName1), alias)
}
- | ("(" ~> start <~ ")") ~ (AS.? ~> ident) ^^ { case s ~ a =>
Subquery(a, s) }
+ | ident ~ ("." ~> ident) ~ ("." ~> ident) ~ (opt(AS) ~> opt(ident))
^^ {
+ case reserveName1 ~ dbName ~ tableName ~ alias =>
+ UnresolvedRelation(IndexedSeq(tableName, dbName, reserveName1),
alias)
+ }
+ | ident ~ ("." ~> ident) ~ (opt(AS) ~> opt(ident)) ^^ {
+ case dbName ~ tableName ~ alias =>
+ UnresolvedRelation(IndexedSeq(tableName, dbName), alias)
+ }
+ | ident ~ (opt(AS) ~> opt(ident)) ^^ {
+ case tableName ~ alias =>
UnresolvedRelation(IndexedSeq(tableName), alias)
--- End diff --
I change it to rep1sep(ident, ".")
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