[IMPALA-9822] Impala does not notify user that row format delimited fields is only logical when using STORED AS TEXTFILE

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: Impala 3.4.0
• Fix Version/s: Impala 4.1.0
• Component/s: Frontend
• Labels: newbie ramp-up usability
• Epic Color: ghx-label-11
• Assignee: Shikha Asrani
• Reporter: Alexandra Dunai
• Created: 03/Jun/20 12:39
• Updated: 27/Mar/23 23:01
• Resolved: 20/Feb/22 07:29

Description

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:

[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

 

Select: 

[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".

Issue Links

• causes: IMPALA-11696 Incorrect warnings when creating text/sequence table with row format delimiters