7662ec23bb
It's a bug while do query like: ```sql select d from (select explode(array(1,1)) d from src limit 1) t ``` And it will throws exception like: ``` org.apache.spark.sql.AnalysisException: cannot resolve 'd' given input columns _c0; line 1 pos 7 at org.apache.spark.sql.catalyst.analysis.package$AnalysisErrorAt.failAnalysis(package.scala:42) at org.apache.spark.sql.catalyst.analysis.CheckAnalysis$$anonfun$apply$3$$anonfun$apply$1.applyOrElse(CheckAnalysis.scala:48) at org.apache.spark.sql.catalyst.analysis.CheckAnalysis$$anonfun$apply$3$$anonfun$apply$1.applyOrElse(CheckAnalysis.scala:45) at org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$transformUp$1.apply(TreeNode.scala:250) at org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$transformUp$1.apply(TreeNode.scala:250) at org.apache.spark.sql.catalyst.trees.CurrentOrigin$.withOrigin(TreeNode.scala:50) at org.apache.spark.sql.catalyst.trees.TreeNode.transformUp(TreeNode.scala:249) at org.apache.spark.sql.catalyst.plans.QueryPlan.org$apache$spark$sql$catalyst$plans$QueryPlan$$transformExpressionUp$1(QueryPlan.scala:103) at org.apache.spark.sql.catalyst.plans.QueryPlan$$anonfun$2$$anonfun$apply$2.apply(QueryPlan.scala:117) at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:244) at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:244) at scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59) at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:47) at scala.collection.TraversableLike$class.map(TraversableLike.scala:244) at scala.collection.AbstractTraversable.map(Traversable.scala:105) at org.apache.spark.sql.catalyst.plans.QueryPlan$$anonfun$2.apply(QueryPlan.scala:116) at scala.collection.Iterator$$anon$11.next(Iterator.scala:328) ``` To solve the bug, it requires code refactoring for UDTF The major changes are about: * Simplifying the UDTF development, UDTF will manage the output attribute names any more, instead, the `logical.Generate` will handle that properly. * UDTF will be asked for the output schema (data types) during the logical plan analyzing. Author: Cheng Hao <hao.cheng@intel.com> Closes #4602 from chenghao-intel/explode_bug and squashes the following commits: c2a5132 [Cheng Hao] add back resolved for Alias 556e982 [Cheng Hao] revert the unncessary change 002c361 [Cheng Hao] change the rule of resolved for Generate 04ae500 [Cheng Hao] add qualifier only for generator output 5ee5d2c [Cheng Hao] prepend the new qualifier d2e8b43 [Cheng Hao] Update the code as feedback ca5e7f4 [Cheng Hao] shrink the commits |
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