wangyum opened a new pull request #24933: [SPARK-28059][SQL][TEST] Port int8.sql URL: https://github.com/apache/spark/pull/24933 ## What changes were proposed in this pull request? This PR is to port int4.sql from PostgreSQL regression tests. https://github.com/postgres/postgres/blob/REL_12_BETA1/src/test/regress/sql/int8.sql The expected results can be found in the link: https://github.com/postgres/postgres/blob/REL_12_BETA1/src/test/regress/expected/int8.out When porting the test cases, found two PostgreSQL specific features that do not exist in Spark SQL: [SPARK-28137](https://issues.apache.org/jira/browse/SPARK-28137): Missing Data Type Formatting Functions [SPARK-28027](https://issues.apache.org/jira/browse/SPARK-28027): Missing some mathematical operators Also, found a bug: [SPARK-28024](https://issues.apache.org/jira/browse/SPARK-28024): Incorrect value when out of range Also, found three inconsistent behavior: [SPARK-27923](https://issues.apache.org/jira/browse/SPARK-27923): Spark SQL insert there bad inputs to NULL [SPARK-28028](https://issues.apache.org/jira/browse/SPARK-28028): Cast numeric to integral type need round [SPARK-2659](https://issues.apache.org/jira/browse/SPARK-2659): HiveQL: Division operator should always perform fractional division, for example: ```sql select 1/2; ``` ## How was this patch tested? N/A
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