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https://issues.apache.org/jira/browse/IMPALA-9822?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Quanlong Huang reassigned IMPALA-9822:
--------------------------------------
Assignee: Shikha Asrani (was: Fucun Chu)
> Impala does not notify user that row format delimited fields is only logical
> when using STORED AS TEXTFILE
> ----------------------------------------------------------------------------------------------------------
>
> Key: IMPALA-9822
> URL: https://issues.apache.org/jira/browse/IMPALA-9822
> Project: IMPALA
> Issue Type: Improvement
> Components: Frontend
> Affects Versions: Impala 3.4.0
> Reporter: Alexandra Dunai
> Assignee: Shikha Asrani
> Priority: Minor
> Labels: newbie, ramp-up, usability
>
> When creating a table with added "ROW FORMAT DELIMITED FIELDS", Impala does
> not alert the user that this is only logical when using STORED AS TEXTFILE.
> You only discover that you made a mistake after trying to run a select from
> the table.
> Table creation:
> {code:bash}
> [adunai-1.adunai.root.hwx.site:21000] default> CREATE EXTERNAL TABLE
> sales_fact_1997(product_id INT,time_id INT,customer_id INT,promotion_id
> INT,store_id INT,store_sales DECIMAL(10,4),store_cost
> DECIMAL(10,4),unit_sales DECIMAL(10,4))
> > row format delimited fields terminated by '\011' STORED AS PARQUET
> > location '/user/impala/mondrian/sales_fact_1997';
> Query: CREATE EXTERNAL TABLE sales_fact_1997(product_id INT,time_id
> INT,customer_id INT,promotion_id INT,store_id INT,store_sales
> DECIMAL(10,4),store_cost DECIMAL(10,4),unit_sales DECIMAL(10,4))row format
> delimited fields terminated by '\011' STORED AS PARQUET location
> '/user/impala/mondrian/sales_fact_1997'
>
> +-------------------------+
> | summary |
> +-------------------------+
> | Table has been created. |
> +-------------------------+
> Fetched 1 row(s) in 0.10s
> {code}
>
> Select:
> {code:bash}
> [adunai-1.adunai.root.hwx.site:21000] mondrian> select count(*) from
> agg_c_10_sales_fact_1997;
> Query: select count(*) from agg_c_10_sales_fact_1997
> Query submitted at: 2020-06-03 11:55:06 (Coordinator:
> http://adunai-1.adunai.root.hwx.site:25000)
> Query progress can be monitored at:
> http://adunai-1.adunai.root.hwx.site:25000/query_plan?query_id=d547fafd0162da4e:872a95c100000000
> ERROR: File
> 'hdfs://adunai-2.adunai.root.hwx.site:8020/user/impala/mondrian/agg_c_10_sales_fact_1997/agg_c_10_sales_fact_1997.tsv'
> has an invalid Parquet version number: 717. Please check that it is a valid
> Parquet file. This error can also occur due to stale metadata. If you believe
> this is a valid Parquet file, try running "refresh
> mondrian.agg_c_10_sales_fact_1997".{code}
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