Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/11563#discussion_r55260262
--- Diff:
sql/hive/src/main/scala/org/apache/spark/sql/hive/SQLBuilder.scala ---
@@ -297,6 +322,31 @@ class SQLBuilder(logicalPlan: LogicalPlan, sqlContext:
SQLContext) extends Loggi
)
}
+ /* This function handles the SQL generation when generators are
specified in the
+ * LATERAL VIEW clause. SQL generation of generators specified in
projection lists
+ * are handled in projectToSQL.
+ * sample plan :
+ * +- Project [mycol2#192]
+ * +- Generate explode(myCol#191), true, false, Some(mytable2),
[mycol2#192]
+ * +- Generate explode(array(array(1, 2, 3))), true, false,
Some(mytable), [mycol#191]
+ * +- MetastoreRelation default, src, None
+ *
+ */
+ private def generateToSQL(plan: Generate): String = {
+ val columnAliases = plan.generatorOutput.map(a =>
quoteIdentifier(a.name)).mkString(",")
+ val generatorAlias = if (plan.qualifier.isEmpty) "" else
plan.qualifier.get
+ val outerClause = if (plan.outer) "OUTER" else ""
+ build(
+ toSQL(plan.child),
+ "LATERAL VIEW ",
--- End diff --
```
"LATERAL VIEW "
```
->
```
"LATERAL VIEW"
```
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