Bug: CREATE EXTERNAL TABLE doesn't work without STORED AS
Status: Resolved | Priority: Major | Resolution: Duplicate
Created: 06/Jan/20 12:17
Affects Version/s: 3.0.0

CREATE EXTERNAL TABLE doesn't work as before since Spark 3.0.0 preview 2. 

SPARK-30098 describes the goal as `spark.sql.source.default` as default provider if there's no explicit "USING provider", but parser rule seems to be modified more than the goal which breaks CREATE EXTERNAL TABLE.
{noformat}
scala> sql("CREATE EXTERNAL TABLE aaa (key INT, value STRING) USING HIVE LOCATION '/tmp/aaa'")
org.apache.spark.sql.catalyst.parser.ParseException:
Operation not allowed: CREATE EXTERNAL TABLE ...(line 1, pos 0)
== SQL ==
CREATE EXTERNAL TABLE aaa (key INT, value STRING) USING HIVE LOCATION '/tmp/aaa'
^^^  at org.apache.spark.sql.catalyst.parser.ParserUtils$.operationNotAllowed(ParserUtils.scala:41)
  at org.apache.spark.sql.catalyst.parser.AstBuilder.$anonfun$visitCreateTable$1(AstBuilder.scala:2669)
  at org.apache.spark.sql.catalyst.parser.ParserUtils$.withOrigin(ParserUtils.scala:108)
  at org.apache.spark.sql.catalyst.parser.AstBuilder.visitCreateTable(AstBuilder.scala:2666)
  at org.apache.spark.sql.execution.SparkSqlAstBuilder.super$visitCreateTable(SparkSqlParser.scala:188)
  at org.apache.spark.sql.execution.SparkSqlAstBuilder.$anonfun$visitCreateTable$1(SparkSqlParser.scala:188)
  at org.apache.spark.sql.catalyst.parser.ParserUtils$.withOrigin(ParserUtils.scala:108)
  at org.apache.spark.sql.execution.SparkSqlAstBuilder.visitCreateTable(SparkSqlParser.scala:184)
  at org.apache.spark.sql.execution.SparkSqlAstBuilder.visitCreateTable(SparkSqlParser.scala:55)
  at org.apache.spark.sql.catalyst.parser.SqlBaseParser$CreateTableContext.accept(SqlBaseParser.java:1537)
  at org.antlr.v4.runtime.tree.AbstractParseTreeVisitor.visit(AbstractParseTreeVisitor.java:18)
  at org.apache.spark.sql.catalyst.parser.AstBuilder.$anonfun$visitSingleStatement$1(AstBuilder.scala:77)
  at org.apache.spark.sql.catalyst.parser.ParserUtils$.withOrigin(ParserUtils.scala:108)
  at org.apache.spark.sql.catalyst.parser.AstBuilder.visitSingleStatement(AstBuilder.scala:77)
  at org.apache.spark.sql.catalyst.parser.AbstractSqlParser.$anonfun$parsePlan$1(ParseDriver.scala:77)
  at org.apache.spark.sql.catalyst.parser.AbstractSqlParser.parse(ParseDriver.scala:113)
  at org.apache.spark.sql.execution.SparkSqlParser.parse(SparkSqlParser.scala:48)
  at org.apache.spark.sql.catalyst.parser.AbstractSqlParser.parsePlan(ParseDriver.scala:76)
  at org.apache.spark.sql.SparkSession.$anonfun$sql$1(SparkSession.scala:605)
  at org.apache.spark.sql.catalyst.QueryPlanningTracker.measurePhase(QueryPlanningTracker.scala:111)
  at org.apache.spark.sql.SparkSession.sql(SparkSession.scala:605)
  ... 47 elided{noformat}
 
{noformat}
scala> sql("CREATE EXTERNAL TABLE aaa (key INT, value STRING) LOCATION '/tmp/aaa'")
org.apache.spark.sql.catalyst.parser.ParseException:
Operation not allowed: CREATE EXTERNAL TABLE ...(line 1, pos 0)== SQL ==
CREATE EXTERNAL TABLE aaa (key INT, value STRING) LOCATION '/tmp/aaa'
^^^  at org.apache.spark.sql.catalyst.parser.ParserUtils$.operationNotAllowed(ParserUtils.scala:41)
  at org.apache.spark.sql.catalyst.parser.AstBuilder.$anonfun$visitCreateTable$1(AstBuilder.scala:2669)
  at org.apache.spark.sql.catalyst.parser.ParserUtils$.withOrigin(ParserUtils.scala:108)
  at org.apache.spark.sql.catalyst.parser.AstBuilder.visitCreateTable(AstBuilder.scala:2666)
  at org.apache.spark.sql.execution.SparkSqlAstBuilder.super$visitCreateTable(SparkSqlParser.scala:188)
  at org.apache.spark.sql.execution.SparkSqlAstBuilder.$anonfun$visitCreateTable$1(SparkSqlParser.scala:188)
  at org.apache.spark.sql.catalyst.parser.ParserUtils$.withOrigin(ParserUtils.scala:108)
  at org.apache.spark.sql.execution.SparkSqlAstBuilder.visitCreateTable(SparkSqlParser.scala:184)
  at org.apache.spark.sql.execution.SparkSqlAstBuilder.visitCreateTable(SparkSqlParser.scala:55)
  at org.apache.spark.sql.catalyst.parser.SqlBaseParser$CreateTableContext.accept(SqlBaseParser.java:1537)
  at org.antlr.v4.runtime.tree.AbstractParseTreeVisitor.visit(AbstractParseTreeVisitor.java:18)
  at org.apache.spark.sql.catalyst.parser.AstBuilder.$anonfun$visitSingleStatement$1(AstBuilder.scala:77)
  at org.apache.spark.sql.catalyst.parser.ParserUtils$.withOrigin(ParserUtils.scala:108)
  at org.apache.spark.sql.catalyst.parser.AstBuilder.visitSingleStatement(AstBuilder.scala:77)
  at org.apache.spark.sql.catalyst.parser.AbstractSqlParser.$anonfun$parsePlan$1(ParseDriver.scala:77)
  at org.apache.spark.sql.catalyst.parser.AbstractSqlParser.parse(ParseDriver.scala:113)
  at org.apache.spark.sql.execution.SparkSqlParser.parse(SparkSqlParser.scala:48)
  at org.apache.spark.sql.catalyst.parser.AbstractSqlParser.parsePlan(ParseDriver.scala:76)
  at org.apache.spark.sql.SparkSession.$anonfun$sql$1(SparkSession.scala:605)
  at org.apache.spark.sql.catalyst.QueryPlanningTracker.measurePhase(QueryPlanningTracker.scala:111)
  at org.apache.spark.sql.SparkSession.sql(SparkSession.scala:605)
  ... 47 elided
{noformat}
 

It requires unique option for Hive table to let parser use the rule for Hive table. For example, STORED AS would work.
{noformat}
scala> sql("CREATE EXTERNAL TABLE aaa (key INT, value STRING) STORED AS parquet LOCATION '/tmp/aaa'")
20/01/06 21:08:36 WARN HiveConf: HiveConf of name hive.stats.jdbc.timeout does not exist
20/01/06 21:08:36 WARN HiveConf: HiveConf of name hive.stats.retries.wait does not exist
20/01/06 21:08:40 WARN ObjectStore: Version information not found in metastore. hive.metastore.schema.verification is not enabled so recording the schema version 2.3.0
20/01/06 21:08:40 WARN ObjectStore: setMetaStoreSchemaVersion called but recording version is disabled: version = 2.3.0, comment = Set by MetaStore jlim@192.168.1.216
20/01/06 21:08:41 WARN SessionState: METASTORE_FILTER_HOOK will be ignored, since hive.security.authorization.manager is set to instance of HiveAuthorizerFactory.
20/01/06 21:08:41 WARN HiveConf: HiveConf of name hive.internal.ss.authz.settings.applied.marker does not exist
20/01/06 21:08:41 WARN HiveConf: HiveConf of name hive.stats.jdbc.timeout does not exist
20/01/06 21:08:41 WARN HiveConf: HiveConf of name hive.stats.retries.wait does not exist
res3: org.apache.spark.sql.DataFrame = []
{noformat}