[GitHub] [iceberg] pan3793 commented on issue #2348: Iceberg Extensions Parser Should Allow Generic Expressions as Call Args

[GitBox <gi...@apache.org>]

pan3793 commented on issue #2348:
URL: https://github.com/apache/iceberg/issues/2348#issuecomment-873822252


   > ... currently only support a very limited set of Spark expressions as call arguments.
   
   Hi, @RussellSpitzer, before finding the final solution to support generic expressions as call args, could you please list the supported expressions now? 
   
   The examples in documents still not work now (iceberg master branch with spark 3.1).
   
   ```
   E, statement: CALL iceberg.system.expire_snapshots(table => 'cdc_wenjuan.member', older_than => now(), retain_last => 1), time taken: 0.004 seconds
   Error: Error operating EXECUTE_STATEMENT: org.apache.spark.sql.catalyst.parser.extensions.IcebergParseException:
   mismatched input '(' expecting STRING(line 1, pos 85)
   
   == SQL ==
   CALL iceberg.system.expire_snapshots(table => 'cdc_wenjuan.member', older_than => now(), retain_last => 1)
   -------------------------------------------------------------------------------------^^^
   
   	at org.apache.spark.sql.catalyst.parser.extensions.IcebergParseException.withCommand(IcebergSparkSqlExtensionsParser.scala:294)
   	at org.apache.spark.sql.catalyst.parser.extensions.IcebergSparkSqlExtensionsParser.parse(IcebergSparkSqlExtensionsParser.scala:158)
   ```


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