[jira] [Commented] (SPARK-31136) Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax

["Apache Spark (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-31136?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17105811#comment-17105811 ] 

Apache Spark commented on SPARK-31136:
--------------------------------------

User 'HeartSaVioR' has created a pull request for this issue:
https://github.com/apache/spark/pull/28517

> Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax
> -----------------------------------------------------------------------------
>
>                 Key: SPARK-31136
>                 URL: https://issues.apache.org/jira/browse/SPARK-31136
>             Project: Spark
>          Issue Type: Sub-task
>          Components: SQL
>    Affects Versions: 3.0.0
>            Reporter: Dongjoon Hyun
>            Priority: Blocker
>
> We need to consider the behavior change of SPARK-30098 .
> This is a placeholder to keep the discussion and the final decision.
> `CREATE TABLE` syntax changes its behavior silently.
> The following is one example of the breaking the existing user data pipelines.
> *Apache Spark 2.4.5*
> {code}
> spark-sql> CREATE TABLE t(a STRING);
> spark-sql> LOAD DATA INPATH '/usr/local/spark/README.md' INTO TABLE t;
> spark-sql> SELECT * FROM t LIMIT 1;
> # Apache Spark
> Time taken: 2.05 seconds, Fetched 1 row(s)
> {code}
> {code}
> spark-sql> CREATE TABLE t(a CHAR(3));
> spark-sql> INSERT INTO TABLE t SELECT 'a ';
> spark-sql> SELECT a, length(a) FROM t;
> a  	3
> {code}
> *Apache Spark 3.0.0-preview2*
> {code}
> spark-sql> CREATE TABLE t(a STRING);
> spark-sql> LOAD DATA INPATH '/usr/local/spark/README.md' INTO TABLE t;
> Error in query: LOAD DATA is not supported for datasource tables: `default`.`t`;
> {code}
> {code}
> spark-sql> CREATE TABLE t(a CHAR(3));
> spark-sql> INSERT INTO TABLE t SELECT 'a ';
> spark-sql> SELECT a, length(a) FROM t;
> a 	2
> {code}



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