[SPARK-15468][SQL] fix some typos

## What changes were proposed in this pull request?

Fix some typos while browsing the codes.

## How was this patch tested?

None and obvious.

Author: Bo Meng <mengbo@hotmail.com>
Author: bomeng <bmeng@us.ibm.com>

Closes #13246 from bomeng/typo.

5 files changed, 6 insertions, 6 deletions

diff --git a/core/src/main/scala/org/apache/spark/util/AccumulatorV2.scala b/core/src/main/scala/org/apache/spark/util/AccumulatorV2.scala
index 21ba46024d..0b9a47c112 100644
--- a/core/src/main/scala/org/apache/spark/util/AccumulatorV2.scala
+++ b/core/src/main/scala/org/apache/spark/util/AccumulatorV2.scala
@@ -55,7 +55,7 @@ abstract class AccumulatorV2[IN, OUT] extends Serializable {
 
   /**
    * Returns true if this accumulator has been registered.  Note that all accumulators must be
-   * registered before ues, or it will throw exception.
+   * registered before use, or it will throw exception.
    */
   final def isRegistered: Boolean =
     metadata != null && AccumulatorContext.get(metadata.id).isDefined
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateSafeProjection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateSafeProjection.scala
index b0b1212553..214dc40641 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateSafeProjection.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateSafeProjection.scala
@@ -48,7 +48,7 @@ object GenerateSafeProjection extends CodeGenerator[Seq[Expression], Projection]
     val tmp = ctx.freshName("tmp")
     val output = ctx.freshName("safeRow")
     val values = ctx.freshName("values")
-    // These expressions could be splitted into multiple functions
+    // These expressions could be split into multiple functions
     ctx.addMutableState("Object[]", values, s"this.$values = null;")
 
     val rowClass = classOf[GenericInternalRow].getName
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/parser/AstBuilder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/parser/AstBuilder.scala
index cace026701..a13c03a529 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/parser/AstBuilder.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/parser/AstBuilder.scala
@@ -771,7 +771,7 @@ class AstBuilder extends SqlBaseBaseVisitor[AnyRef] with Logging {
    * ******************************************************************************************** */
   /**
    * Create an expression from the given context. This method just passes the context on to the
-   * vistor and only takes care of typing (We assume that the visitor returns an Expression here).
+   * visitor and only takes care of typing (We assume that the visitor returns an Expression here).
    */
   protected def expression(ctx: ParserRuleContext): Expression = typedVisit(ctx)
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/planning/patterns.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/planning/patterns.scala
index 0065619135..f42e67ca6e 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/planning/patterns.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/planning/patterns.scala
@@ -227,8 +227,8 @@ object IntegerIndex {
  *  - Unnamed grouping expressions are named so that they can be referred to across phases of
  *    aggregation
  *  - Aggregations that appear multiple times are deduplicated.
- *  - The compution of the aggregations themselves is separated from the final result. For example,
- *    the `count` in `count + 1` will be split into an [[AggregateExpression]] and a final
+ *  - The computation of the aggregations themselves is separated from the final result. For
+ *    example, the `count` in `count + 1` will be split into an [[AggregateExpression]] and a final
  *    computation that computes `count.resultAttribute + 1`.
  */
 object PhysicalAggregation {
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/UDTRegistration.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/types/UDTRegistration.scala
index 0f24e51ed2..20ec75c706 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/UDTRegistration.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/types/UDTRegistration.scala
@@ -27,7 +27,7 @@ import org.apache.spark.util.Utils
  * This object keeps the mappings between user classes and their User Defined Types (UDTs).
  * Previously we use the annotation `SQLUserDefinedType` to register UDTs for user classes.
  * However, by doing this, we add SparkSQL dependency on user classes. This object provides
- * alterntive approach to register UDTs for user classes.
+ * alternative approach to register UDTs for user classes.
  */
 private[spark]
 object UDTRegistration extends Serializable with Logging {