Fix error

Author: wangyum

sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/InMemoryTableScanExec.scala

@@ -194,7 +194,7 @@ case class InMemoryTableScanExec(
   }
 
   // Returned filter predicate should return false iff it is impossible for the input expression
-  // to evaluate to `true' based on statistics collected about this partition batch.
+  // to evaluate to `true` based on statistics collected about this partition batch.
   @transient lazy val buildFilter: PartialFunction[Expression, Expression] = {
     case And(lhs: Expression, rhs: Expression)
       if buildFilter.isDefinedAt(lhs) || buildFilter.isDefinedAt(rhs) =>
@@ -241,9 +241,6 @@ case class InMemoryTableScanExec(
     case StartsWith(a: AttributeReference, ExtractableLiteral(l)) =>
       statsFor(a).lowerBound.substr(0, Length(l)) <= l &&
         l <= statsFor(a).upperBound.substr(0, Length(l))
-    case StartsWith(ExtractableLiteral(l), a: AttributeReference) =>
-      statsFor(a).lowerBound.substr(0, Length(l)) <= l &&
-        l <= statsFor(a).upperBound.substr(0, Length(l))
   }
 
   lazy val partitionFilters: Seq[Expression] = {

sql/core/src/test/scala/org/apache/spark/sql/execution/columnar/PartitionBatchPruningSuite.scala

@@ -171,12 +171,13 @@ class PartitionBatchPruningSuite
   }
 
   // Support `StartsWith` predicate
-  checkBatchPruning("SELECT CAST(s AS INT) FROM pruningStringData WHERE s like '18%'", 1, 1) {
+  checkBatchPruning("SELECT CAST(s AS INT) FROM pruningStringData WHERE s like '18%'", 1, 1)(
     180 to 189
-  }
-  checkBatchPruning("SELECT CAST(s AS INT) FROM pruningStringData WHERE s like '%'", 5, 11) {
+  )
+  checkBatchPruning("SELECT CAST(s AS INT) FROM pruningStringData WHERE s like '%'", 5, 11)(
     100 to 200
-  }
+  )
+  checkBatchPruning("SELECT CAST(s AS INT) FROM pruningStringData WHERE '18%' like s", 5, 11)(Seq())
 
   // With disable IN_MEMORY_PARTITION_PRUNING option
   test("disable IN_MEMORY_PARTITION_PRUNING") {