renamed outer_* to *_outer in ExpressionToSQLSuite

Author: Bogdan Raducanu

sql/hive/src/test/scala/org/apache/spark/sql/catalyst/ExpressionToSQLSuite.scala

@@ -93,6 +93,7 @@ class ExpressionToSQLSuite extends SQLBuilderTest with SQLTestUtils {
     checkSqlGeneration("SELECT array(1,2,3)")
     checkSqlGeneration("SELECT coalesce(null, 1, 2)")
     checkSqlGeneration("SELECT explode(array(1,2,3))")
+    checkSqlGeneration("SELECT explode_outer(array())")
     checkSqlGeneration("SELECT greatest(1,null,3)")
     checkSqlGeneration("SELECT if(1==2, 'yes', 'no')")
     checkSqlGeneration("SELECT isnan(15), isnan('invalid')")
@@ -102,9 +103,8 @@ class ExpressionToSQLSuite extends SQLBuilderTest with SQLTestUtils {
     checkSqlGeneration("SELECT map(1, 'a', 2, 'b')")
     checkSqlGeneration("SELECT named_struct('c1',1,'c2',2,'c3',3)")
     checkSqlGeneration("SELECT nanvl(a, 5), nanvl(b, 10), nanvl(d, c) from t2")
-    checkSqlGeneration("SELECT outer_explode(array())")
-    checkSqlGeneration("SELECT outer_posexplode(array())")
-    checkSqlGeneration("SELECT outer_inline(array(struct('a', 1)))")
+    checkSqlGeneration("SELECT posexplode_outer(array())")
+    checkSqlGeneration("SELECT inline_outer(array(struct('a', 1)))")
     checkSqlGeneration("SELECT rand(1)")
     checkSqlGeneration("SELECT randn(3)")
     checkSqlGeneration("SELECT struct(1,2,3)")