wangyum opened a new pull request #24862: [WIP][SPARK-28038][SQL][TEST] Port text.sql URL: https://github.com/apache/spark/pull/24862 ## What changes were proposed in this pull request? This PR is to port text.sql from PostgreSQL regression tests. https://github.com/postgres/postgres/blob/REL_12_BETA1/src/test/regress/sql/text.sql The expected results can be found in the link: https://github.com/postgres/postgres/blob/REL_12_BETA1/src/test/regress/expected/text.out When porting the test cases, found a PostgreSQL specific features that do not exist in Spark SQL: [SPARK-28037](https://issues.apache.org/jira/browse/SPARK-28037): Add built-in String Functions: quote_literal Also, found a bug: [SPARK-28033](https://issues.apache.org/jira/browse/SPARK-28033): String concatenation low priority than other operators Also, found two inconsistent behavior: [SPARK-27930](https://issues.apache.org/jira/browse/SPARK-27930): Spark SQL's format_string can not fully support PostgreSQL's format [SPARK-28036](https://issues.apache.org/jira/browse/SPARK-28036): Built-in udf left/right has inconsistent behavior ## How was this patch tested? N/A
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