[SPARK-14211][SQL] Remove ANTLR3 based parser

### What changes were proposed in this pull request?

This PR removes the ANTLR3 based parser, and moves the new ANTLR4 based parser into the `org.apache.spark.sql.catalyst.parser package`.

### How was this patch tested?

Existing unit tests.

cc rxin andrewor14 yhuai

Author: Herman van Hovell <hvanhovell@questtec.nl>

Closes #12071 from hvanhovell/SPARK-14211.

1 files changed, 12 insertions, 1 deletions

diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/command/DDLSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/command/DDLSuite.scala
index 47c9a22acd..f148f2d4ea 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/command/DDLSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/command/DDLSuite.scala
@@ -21,11 +21,22 @@ import java.io.File
 
 import org.apache.spark.sql.{AnalysisException, QueryTest, Row}
 import org.apache.spark.sql.catalyst.catalog.CatalogDatabase
-import org.apache.spark.sql.catalyst.parser.ParserUtils._
 import org.apache.spark.sql.test.SharedSQLContext
 
 class DDLSuite extends QueryTest with SharedSQLContext {
 
+  private val escapedIdentifier = "`(.+)`".r
+
+  /**
+   * Strip backticks, if any, from the string.
+   */
+  def cleanIdentifier(ident: String): String = {
+    ident match {
+      case escapedIdentifier(i) => i
+      case plainIdent => plainIdent
+    }
+  }
+
   /**
    * Drops database `databaseName` after calling `f`.
    */