[SPARK-24077] Issue a better error message for `CREATE TEMPORARY FUNCTION IF NOT EXISTS`

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.3.0
• Fix Version/s: 2.3.0
• Component/s: SQL
• Labels: starter
• Assignee: Xiaochen Ouyang
• Reporter: Benedict Jin
• Created: 25/Apr/18 02:42
• Updated: 12/Dec/22 18:10
• Resolved: 01/Oct/19 01:23

Description

The error message of CREATE TEMPORARY FUNCTION IF NOT EXISTS looks confusing:

scala> org.apache.spark.sql.SparkSession.builder().enableHiveSupport.getOrCreate.sql("CREATE TEMPORARY FUNCTION IF NOT EXISTS yuzhouwan as 'org.apache.spark.sql.hive.udf.YuZhouWan'")

org.apache.spark.sql.catalyst.parser.ParseException:
mismatched input 'NOT' expecting \{'.', 'AS'}(line 1, pos 29)

== SQL ==
 CREATE TEMPORARY FUNCTION IF NOT EXISTS yuzhouwan as 'org.apache.spark.sql.hive.udf.YuZhouWan'
 -----------------------------^^^
 at org.apache.spark.sql.catalyst.parser.ParseException.withCommand(ParseDriver.scala:197)
 at org.apache.spark.sql.catalyst.parser.AbstractSqlParser.parse(ParseDriver.scala:99)
 at org.apache.spark.sql.execution.SparkSqlParser.parse(SparkSqlParser.scala:45)
 at org.apache.spark.sql.catalyst.parser.AbstractSqlParser.parsePlan(ParseDriver.scala:53)
 at org.apache.spark.sql.SparkSession.sql(SparkSession.scala:592)
 ... 48 elided