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https://issues.apache.org/jira/browse/SPARK-19115?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xiaochen Ouyang reopened SPARK-19115:
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spark2.x unsupports the sql command: create external table if not exists
gen_tbl like src_tbl location '/warehouse/gen_tbl'
> SparkSQL unsupports the command " create external table if not exist new_tbl
> like old_tbl location '/warehouse/new_tbl' "
> --------------------------------------------------------------------------------------------------------------------------
>
> Key: SPARK-19115
> URL: https://issues.apache.org/jira/browse/SPARK-19115
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.0.1
> Environment: spark2.0.1 hive1.2.1
> Reporter: Xiaochen Ouyang
>
> spark2.0.1 unsupports the command " create external table if not exist
> new_tbl like old_tbl location '/warehouse/new_tbl' "
> we tried to modify the sqlbase.g4 file,change
> " | CREATE TABLE (IF NOT EXISTS)? target=tableIdentifier
> LIKE source=tableIdentifier
> #createTableLike"
> to
> " | CREATE EXTERNAL? TABLE (IF NOT EXISTS)? target=tableIdentifier
> LIKE source=tableIdentifier locationSpec?
> #createTableLike"
> modify method 'visitCreateTableLike' in scala file 'SparkSqlParser.scala'
> and update case class CreateTableLikeCommand in 'tables.scala' file
> finally we compiled spark and replaced the jars as follow:
> 'spark-catalyst-2.0.1.jar','spark-sql_2.11-2.0.1.jar', and run the command
> 'create external table if not exist new_tbl like old_tbl location
> '/warehouse/new_tbl' successfully .
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