Wenchen Fan 6c12e801e8 [SPARK-15029] improve error message for Generate ... ## What changes were proposed in this pull request? This PR improve the error message for `Generate` in 3 cases: 1. generator is nested in expressions, e.g. `SELECT explode(list) + 1 FROM tbl` 2. generator appears more than one time in SELECT, e.g. `SELECT explode(list), explode(list) FROM tbl` 3. generator appears in other operator which is not project, e.g. `SELECT * FROM tbl SORT BY explode(list)` ## How was this patch tested? new tests in `AnalysisErrorSuite` Author: Wenchen Fan <wenchen@databricks.com> Closes #12810 from cloud-fan/bug.		2016-05-04 00:10:20 -07:00
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main	[SPARK-15029] improve error message for Generate	2016-05-04 00:10:20 -07:00
test	[SPARK-14237][SQL] De-duplicate partition value appending logic in various buildReader() implementations	2016-05-04 14:16:57 +08:00