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Posted to reviews@spark.apache.org by GitBox <gi...@apache.org> on 2020/03/12 19:28:55 UTC

[GitHub] [spark] dongjoon-hyun opened a new pull request #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax

dongjoon-hyun opened a new pull request #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax
URL: https://github.com/apache/spark/pull/27894
 
 
   ### What changes were proposed in this pull request?
   
   This PR (SPARK-31136) is created to see how many tests are affected.
   
   ### Why are the changes needed?
   
   This aims to comply the new community policy.
   
   ### Does this PR introduce any user-facing change?
   
   Yes. This restores the existing behavior to avoid breaking the existing user pipeline.
   
   ### How was this patch tested?
   
   Pass the Jenkins.
   

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[GitHub] [spark] AmplabJenkins commented on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax

Posted by GitBox <gi...@apache.org>.
AmplabJenkins commented on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax
URL: https://github.com/apache/spark/pull/27894#issuecomment-600458489
 
 
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[GitHub] [spark] dongjoon-hyun edited a comment on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax

Posted by GitBox <gi...@apache.org>.
dongjoon-hyun edited a comment on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax
URL: https://github.com/apache/spark/pull/27894#issuecomment-598534823
 
 
   I'm not looking at the number of failures. Since the UT had better be independent to the global conf changes, we had better add guards with `withSQLConf` at least.
   
   The following is not a cost at all. The users already know that the vectorization is only enabled in case of native tables, do they? There exist user groups who have some reasons why they choose a vanilla Hive table. Not only for that, some users prefer `hive` ORC implementation to avoid Spark's `CHAR/VARCHAR` behavior difference.
   > On the other hand, the "cost to maintain" is losing Spark's perf benefits: 
   
   Please see the old mail thread.
   - https://lists.apache.org/thread.html/96b004331d9762e356053b5c8c97e953e398e489d15e1b49e775702f%40%3Cdev.spark.apache.org%3E

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Posted by GitBox <gi...@apache.org>.
AmplabJenkins removed a comment on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax
URL: https://github.com/apache/spark/pull/27894#issuecomment-600460129
 
 
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[GitHub] [spark] SparkQA commented on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax

Posted by GitBox <gi...@apache.org>.
SparkQA commented on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax
URL: https://github.com/apache/spark/pull/27894#issuecomment-598472888
 
 
   **[Test build #119729 has started](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/119729/testReport)** for PR 27894 at commit [`7765675`](https://github.com/apache/spark/commit/7765675190ddbd8ddc96eb4f136113682ee13e63).

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[GitHub] [spark] HyukjinKwon commented on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax

Posted by GitBox <gi...@apache.org>.
HyukjinKwon commented on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax
URL: https://github.com/apache/spark/pull/27894#issuecomment-598543190
 
 
   Looks coherent to revert it per @marmbrus's policy and reverts made so far, although I personally are not really convinced that we should revert.
   
   Reverting this change discourages users to leverage Spark's new features and edge optimizations, and let users more stick to Hive. What's your thought @marmbrus?

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[GitHub] [spark] dongjoon-hyun edited a comment on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax

Posted by GitBox <gi...@apache.org>.
dongjoon-hyun edited a comment on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax
URL: https://github.com/apache/spark/pull/27894#issuecomment-598502732
 
 
   A lot of failures remains.
   ```
    org.apache.spark.sql.SQLQueryTestSuite.sql	1.1 sec	1
    org.apache.spark.sql.SQLQueryTestSuite.sql	3.2 sec	1
    org.apache.spark.sql.connector.DataSourceV2SQLSuite.CreateTable: without USING clause	2 ms	1
    org.apache.spark.sql.connector.DataSourceV2SQLSuite.CreateTableAsSelect: without USING clause	4 ms	1
    org.apache.spark.sql.execution.command.DDLParserSuite.Test CTAS #3	2 ms	1
    org.apache.spark.sql.execution.command.DDLParserSuite.create table - basic	1 ms	1
    org.apache.spark.sql.execution.command.DDLParserSuite.create table - with database name	2 ms	1
    org.apache.spark.sql.execution.command.DDLParserSuite.create table - temporary	2 ms	1
    org.apache.spark.sql.execution.command.DDLParserSuite.create table - external	2 ms	1
    org.apache.spark.sql.execution.command.DDLParserSuite.create table - if not exists	2 ms	1
    org.apache.spark.sql.execution.command.DDLParserSuite.create table - comment	3 ms	1
    org.apache.spark.sql.execution.command.DDLParserSuite.create table - partitioned columns	3 ms	1
    org.apache.spark.sql.execution.command.DDLParserSuite.create table - clustered by	2 ms	1
    org.apache.spark.sql.execution.command.DDLParserSuite.create table - properties	1 ms	1
    org.apache.spark.sql.sources.InsertSuite.SPARK-29174 Support LOCAL in INSERT OVERWRITE DIRECTORY to data source
   ```

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[GitHub] [spark] SparkQA removed a comment on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax

Posted by GitBox <gi...@apache.org>.
SparkQA removed a comment on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax
URL: https://github.com/apache/spark/pull/27894#issuecomment-598444555
 
 
   **[Test build #119728 has started](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/119728/testReport)** for PR 27894 at commit [`da991af`](https://github.com/apache/spark/commit/da991af705370d0f82e4212de4f5f9e21dee1d62).

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URL: https://github.com/apache/spark/pull/27894#issuecomment-598377847
 
 
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[GitHub] [spark] AmplabJenkins commented on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax

Posted by GitBox <gi...@apache.org>.
AmplabJenkins commented on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax
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[GitHub] [spark] dongjoon-hyun edited a comment on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax

Posted by GitBox <gi...@apache.org>.
dongjoon-hyun edited a comment on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax
URL: https://github.com/apache/spark/pull/27894#issuecomment-598534823
 
 
   I'm not looking at the number of failures. Since the UT had better be independent to the global conf changes, we had better add guards with `withSQLConf` at least.

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[GitHub] [spark] AmplabJenkins commented on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax

Posted by GitBox <gi...@apache.org>.
AmplabJenkins commented on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax
URL: https://github.com/apache/spark/pull/27894#issuecomment-598419125
 
 
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AmplabJenkins removed a comment on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax
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[GitHub] [spark] AmplabJenkins removed a comment on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax

Posted by GitBox <gi...@apache.org>.
AmplabJenkins removed a comment on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax
URL: https://github.com/apache/spark/pull/27894#issuecomment-598491197
 
 
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[GitHub] [spark] AmplabJenkins commented on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax

Posted by GitBox <gi...@apache.org>.
AmplabJenkins commented on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax
URL: https://github.com/apache/spark/pull/27894#issuecomment-598419129
 
 
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[GitHub] [spark] dongjoon-hyun commented on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax

Posted by GitBox <gi...@apache.org>.
dongjoon-hyun commented on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax
URL: https://github.com/apache/spark/pull/27894#issuecomment-598502732
 
 
   A lot of failures are remaining.
   ```
    org.apache.spark.sql.SQLQueryTestSuite.sql	1.1 sec	1
    org.apache.spark.sql.SQLQueryTestSuite.sql	3.2 sec	1
    org.apache.spark.sql.connector.DataSourceV2SQLSuite.CreateTable: without USING clause	2 ms	1
    org.apache.spark.sql.connector.DataSourceV2SQLSuite.CreateTableAsSelect: without USING clause	4 ms	1
    org.apache.spark.sql.execution.command.DDLParserSuite.Test CTAS #3	2 ms	1
    org.apache.spark.sql.execution.command.DDLParserSuite.create table - basic	1 ms	1
    org.apache.spark.sql.execution.command.DDLParserSuite.create table - with database name	2 ms	1
    org.apache.spark.sql.execution.command.DDLParserSuite.create table - temporary	2 ms	1
    org.apache.spark.sql.execution.command.DDLParserSuite.create table - external	2 ms	1
    org.apache.spark.sql.execution.command.DDLParserSuite.create table - if not exists	2 ms	1
    org.apache.spark.sql.execution.command.DDLParserSuite.create table - comment	3 ms	1
    org.apache.spark.sql.execution.command.DDLParserSuite.create table - partitioned columns	3 ms	1
    org.apache.spark.sql.execution.command.DDLParserSuite.create table - clustered by	2 ms	1
    org.apache.spark.sql.execution.command.DDLParserSuite.create table - properties	1 ms	1
    org.apache.spark.sql.sources.InsertSuite.SPARK-29174 Support LOCAL in INSERT OVERWRITE DIRECTORY to data source
   ```

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Posted by GitBox <gi...@apache.org>.
AmplabJenkins commented on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax
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Posted by GitBox <gi...@apache.org>.
SparkQA removed a comment on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax
URL: https://github.com/apache/spark/pull/27894#issuecomment-598472888
 
 
   **[Test build #119729 has started](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/119729/testReport)** for PR 27894 at commit [`7765675`](https://github.com/apache/spark/commit/7765675190ddbd8ddc96eb4f136113682ee13e63).

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[GitHub] [spark] SparkQA commented on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax

Posted by GitBox <gi...@apache.org>.
SparkQA commented on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax
URL: https://github.com/apache/spark/pull/27894#issuecomment-598418962
 
 
   **[Test build #119724 has finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/119724/testReport)** for PR 27894 at commit [`be16bf5`](https://github.com/apache/spark/commit/be16bf514dae5e52806de9decc6b37e37ad81a7b).
    * This patch **fails Spark unit tests**.
    * This patch merges cleanly.
    * This patch adds no public classes.

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[GitHub] [spark] dongjoon-hyun commented on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax

Posted by GitBox <gi...@apache.org>.
dongjoon-hyun commented on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax
URL: https://github.com/apache/spark/pull/27894#issuecomment-598432083
 
 
   As expected, it fails. But, unfortunately, it failed at the first failure.

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[GitHub] [spark] SparkQA commented on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax

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SparkQA commented on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax
URL: https://github.com/apache/spark/pull/27894#issuecomment-598491144
 
 
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[GitHub] [spark] dongjoon-hyun commented on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax

Posted by GitBox <gi...@apache.org>.
dongjoon-hyun commented on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax
URL: https://github.com/apache/spark/pull/27894#issuecomment-598544462
 
 
   It just became a correctness issue due to the another example of `CHAR` type.

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[GitHub] [spark] dongjoon-hyun edited a comment on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax

Posted by GitBox <gi...@apache.org>.
dongjoon-hyun edited a comment on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax
URL: https://github.com/apache/spark/pull/27894#issuecomment-598534823
 
 
   I'm not looking at the number of failures. Since the UT had better be independent to the global conf changes, we had better add guards with `withSQLConf` at least.
   
   The following is not a cost at all. The users already know that the vectorization is only enabled in case of native tables, don't they? There exist user groups who have some reasons why they choose a vanilla Hive table. Not only for that, some users prefer `hive` Parquet/ORC implementation to avoid Spark's `CHAR/VARCHAR` behavior difference.
   > On the other hand, the "cost to maintain" is losing Spark's perf benefits: 
   
   Please see the old mail thread.
   - https://lists.apache.org/thread.html/96b004331d9762e356053b5c8c97e953e398e489d15e1b49e775702f%40%3Cdev.spark.apache.org%3E
   
   This will also break the query result on `CHAR` type.

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[GitHub] [spark] SparkQA commented on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax

Posted by GitBox <gi...@apache.org>.
SparkQA commented on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax
URL: https://github.com/apache/spark/pull/27894#issuecomment-600318272
 
 
   **[Test build #119948 has finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/119948/testReport)** for PR 27894 at commit [`1a68632`](https://github.com/apache/spark/commit/1a6863218577e4aa340c754539ec679644402e75).
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    * This patch **does not merge cleanly**.
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[GitHub] [spark] dongjoon-hyun edited a comment on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax

Posted by GitBox <gi...@apache.org>.
dongjoon-hyun edited a comment on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax
URL: https://github.com/apache/spark/pull/27894#issuecomment-598534823
 
 
   I'm not looking at the number of failures. Since the UT had better be independent to the global conf changes, we had better add guards with `withSQLConf` at least.
   
   The following is not a cost at all. The users already know that the vectorization is only enabled in case of native tables, don't they? There exist user groups who have some reasons why they choose a vanilla Hive table. Not only for that, some users prefer `hive` ORC implementation to avoid Spark's `CHAR/VARCHAR` behavior difference.
   > On the other hand, the "cost to maintain" is losing Spark's perf benefits: 
   
   Please see the old mail thread.
   - https://lists.apache.org/thread.html/96b004331d9762e356053b5c8c97e953e398e489d15e1b49e775702f%40%3Cdev.spark.apache.org%3E
   
   This will also break the query result on `CHAR` type.

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[GitHub] [spark] dongjoon-hyun commented on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax

Posted by GitBox <gi...@apache.org>.
dongjoon-hyun commented on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax
URL: https://github.com/apache/spark/pull/27894#issuecomment-598540663
 
 
   Hi, All. I marked SPARK-31136 as a correctness issue and added the example.

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[GitHub] [spark] dongjoon-hyun closed pull request #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax

Posted by GitBox <gi...@apache.org>.
dongjoon-hyun closed pull request #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax
URL: https://github.com/apache/spark/pull/27894
 
 
   

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[GitHub] [spark] SparkQA commented on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax

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SparkQA commented on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax
URL: https://github.com/apache/spark/pull/27894#issuecomment-600577959
 
 
   **[Test build #119971 has finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/119971/testReport)** for PR 27894 at commit [`9bff392`](https://github.com/apache/spark/commit/9bff39245269a60b32c9c4f9911b7d0c3a8b6b8a).
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[GitHub] [spark] dongjoon-hyun commented on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax

Posted by GitBox <gi...@apache.org>.
dongjoon-hyun commented on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax
URL: https://github.com/apache/spark/pull/27894#issuecomment-600458469
 
 
   Retest this please

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[GitHub] [spark] cloud-fan commented on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax

Posted by GitBox <gi...@apache.org>.
cloud-fan commented on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax
URL: https://github.com/apache/spark/pull/27894#issuecomment-598534428
 
 
   I agree that we should evaluate the "cost to break", but looking at unit tests may not be a good idea. They heavily rely on internal assumptions and changing the table format will definitely break a lot of unit tests.
   
   Ideally, table format only decides how the table is stored and should be a performance thing, but hive table is a bit different. IMO, the "cost to break" is losing hive compatibility a bit: Now the tables created without USING may not be readable to hive, and some hive specific commands like LOAD TABLE doesn't work for them.
   
   On the other hand, the "cost to maintain" is losing Spark's perf benefits: Many users just run `CREATE TABLE` like they do in other databases, which creates a hive table before 3.0. This means all the features we build for our native readers are not available, like the vectorized reader, nested column pruning, nested field filter pushdown (@dbtsai is working on it), bucketed table, etc.
   
   I think in this case the "cost to maintain" is more serious and we should accept this change. cc @marmbrus @srowen  @maropu @viirya @HyukjinKwon 

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   cc @rxin too

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[GitHub] [spark] dongjoon-hyun edited a comment on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax

Posted by GitBox <gi...@apache.org>.
dongjoon-hyun edited a comment on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax
URL: https://github.com/apache/spark/pull/27894#issuecomment-598534823
 
 
   I'm not looking at the number of failures. Since the UT had better be independent to the global conf changes, we had better add guards with `withSQLConf` at least.
   
   The following is not a cost at all. The users already know that the vectorization is only enabled in case of native tables, don't they? There exist user groups who have some reasons why they choose a vanilla Hive table. As a side note, some users prefer `hive` Parquet/ORC implementation to avoid Spark's `CHAR/VARCHAR` behavior difference.
   > On the other hand, the "cost to maintain" is losing Spark's perf benefits: 
   
   Please see the old mail thread.
   - https://lists.apache.org/thread.html/96b004331d9762e356053b5c8c97e953e398e489d15e1b49e775702f%40%3Cdev.spark.apache.org%3E
   
   This will also break the query result on `CHAR` type.

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[GitHub] [spark] cloud-fan edited a comment on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax

Posted by GitBox <gi...@apache.org>.
cloud-fan edited a comment on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax
URL: https://github.com/apache/spark/pull/27894#issuecomment-598534428
 
 
   I agree that we should evaluate the "cost to break", but looking at unit tests may not be a good idea. They heavily rely on internal assumptions and changing the table format will definitely break a lot of unit tests.
   
   Ideally, table format only decides how the table is stored and should be a performance thing, but hive table is a bit different. IMO, the "cost to break" is losing hive compatibility a bit: Now the tables created without USING may not be readable to hive, and some hive specific commands like LOAD TABLE doesn't work for them.
   
   On the other hand, the "cost to maintain" is losing Spark's perf benefits: Many users just run `CREATE TABLE` like they do in other databases, which creates a hive table before 3.0. This means all the features we build for our native readers are not available, like the vectorized reader, nested column pruning, nested field filter pushdown (@dbtsai is working on it), bucketed table, etc.
   
   I think in this case the "cost to maintain" is more serious and we should accept that change and don't revert it. cc @marmbrus @srowen  @maropu @viirya @HyukjinKwon 
   
   UPDATED to make my opinion more clear.

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[GitHub] [spark] dongjoon-hyun edited a comment on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax

Posted by GitBox <gi...@apache.org>.
dongjoon-hyun edited a comment on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax
URL: https://github.com/apache/spark/pull/27894#issuecomment-598534823
 
 
   I'm not looking at the number of failures. Since the UT had better be independent to the global conf changes, we had better add guards with `withSQLConf` at least.
   
   The following is not a cost at all. The users already know that the vectorization is only enabled in case of native tables, do they? There exist user groups who have some reasons why they choose a vanilla Hive table. Not only for that, some users prefer `hive` ORC implementation to avoid Spark's `CHAR/VARCHAR` behavior difference.
   > On the other hand, the "cost to maintain" is losing Spark's perf benefits: 

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[GitHub] [spark] AmplabJenkins commented on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax

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[GitHub] [spark] dongjoon-hyun edited a comment on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax

Posted by GitBox <gi...@apache.org>.
dongjoon-hyun edited a comment on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax
URL: https://github.com/apache/spark/pull/27894#issuecomment-598534823
 
 
   I'm not looking at the number of failures. Since the UT had better be independent to the global conf changes, we had better add guards with `withSQLConf` at least.
   
   The following is not a cost at all. The users already know that the vectorization is only enabled in case of native tables, do they? There exist user groups who have some reasons why they choose a vanilla Hive table. Not only for that, some users prefer `hive` ORC implementation to avoid Spark's `CHAR/VARCHAR` behavior difference.
   > On the other hand, the "cost to maintain" is losing Spark's perf benefits: 
   
   Please see the old mail thread.
   - https://lists.apache.org/thread.html/96b004331d9762e356053b5c8c97e953e398e489d15e1b49e775702f%40%3Cdev.spark.apache.org%3E
   
   This will also break the query result on `CHAR` type.

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[GitHub] [spark] dongjoon-hyun commented on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax

Posted by GitBox <gi...@apache.org>.
dongjoon-hyun commented on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax
URL: https://github.com/apache/spark/pull/27894#issuecomment-601535039
 
 
   Thank you all! I'm going to close this PR because this is discussed explicitly.

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[GitHub] [spark] SparkQA removed a comment on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax

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URL: https://github.com/apache/spark/pull/27894#issuecomment-600248835
 
 
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[GitHub] [spark] dongjoon-hyun edited a comment on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax

Posted by GitBox <gi...@apache.org>.
dongjoon-hyun edited a comment on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax
URL: https://github.com/apache/spark/pull/27894#issuecomment-598534823
 
 
   I'm not looking at the number of failures. Since the UT had better be independent to the global conf changes, we had better add guards with `withSQLConf` at least.
   
   The following is not a cost at all. The users already know that the vectorization is only enabled in case of native tables, do they? There exists user groups who has a reason why they choose a vanilla table. Not only for that, some users prefer `hive` ORC implementation to avoid Spark's `CHAR/VARCHAR` behavior difference.
   > On the other hand, the "cost to maintain" is losing Spark's perf benefits: 

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[GitHub] [spark] AmplabJenkins commented on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax

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[GitHub] [spark] dongjoon-hyun commented on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax

Posted by GitBox <gi...@apache.org>.
dongjoon-hyun commented on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax
URL: https://github.com/apache/spark/pull/27894#issuecomment-598534823
 
 
   > I'm not looking at the number of failures.
   
   Since the UT had better be independent to the global conf changes, we had better add guards with `withSQLConf` at least.

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[GitHub] [spark] dongjoon-hyun edited a comment on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax

Posted by GitBox <gi...@apache.org>.
dongjoon-hyun edited a comment on issue #27894: [SPARK-31136] Revert SPARK-30098 Use default datasource as provider for CREATE TABLE syntax
URL: https://github.com/apache/spark/pull/27894#issuecomment-598534823
 
 
   I'm not looking at the number of failures. Since the UT had better be independent to the global conf changes, we had better add guards with `withSQLConf` at least.
   
   The following is not a cost at all. The users already know that the vectorization is only enabled in case of native tables, do they? There exist user groups who has a reason why they choose a vanilla table. Not only for that, some users prefer `hive` ORC implementation to avoid Spark's `CHAR/VARCHAR` behavior difference.
   > On the other hand, the "cost to maintain" is losing Spark's perf benefits: 

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