dongjoon-hyun opened a new pull request #23458: [SPARK-26540][SQL] Support 
PostgreSQL numeric arrays without precision/scale
URL: https://github.com/apache/spark/pull/23458
 
 
   ## What changes were proposed in this pull request?
   
   Currently, Spark cannot handle `numeric[]` type with decimal data because 
both precision and scale are considered as 0.
   
   ```
   postgres=# CREATE TABLE t (v numeric[], d  numeric);
   CREATE TABLE
   postgres=# INSERT INTO t VALUES('{1111.222,2222.332}', 222.4555);
   INSERT 0 1
   ```
   
   ## How was this patch tested?
   
   TBD

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