fix incorrect expression conversion: Days should be DayOfMonth.

add wget retry in github workflows.

Author: zhangli20

.github/workflows/tpcds-reusable.yml

@@ -73,7 +73,15 @@ jobs:
       - name: Setup ${{ inputs.sparkver }}
         if: steps.cache-spark.outputs.cache-hit != 'true'
         run: |
-          wget -c ${{ inputs.sparkurl }}
+          wget_retry=0  # wget with retry
+          while ! wget -c ${{ inputs.sparkurl }}; do
+            if [ $wget_retry -ge 5 ]; then
+              exit 1
+            fi
+            let wget_retry+=1
+            sleep 5
+          done
+
           mkdir -p spark-bin-${{ inputs.sparkver }}
           cd spark-bin-${{ inputs.sparkver }} && tar -xf ../spark-*.tgz --strip-component=1
 

spark-extension/src/main/scala/org/apache/spark/sql/blaze/NativeConverters.scala

@@ -51,7 +51,7 @@ import org.apache.spark.sql.catalyst.plans.LeftSemi
 import org.apache.spark.sql.catalyst.plans.RightOuter
 import org.apache.spark.sql.catalyst.util.ArrayData
 import org.apache.spark.sql.catalyst.InternalRow
-import org.apache.spark.sql.catalyst.expressions.Days
+import org.apache.spark.sql.catalyst.expressions.DayOfMonth
 import org.apache.spark.sql.catalyst.expressions.GetJsonObject
 import org.apache.spark.sql.catalyst.expressions.LeafExpression
 import org.apache.spark.sql.catalyst.expressions.Month
@@ -875,7 +875,7 @@ object NativeConverters extends Logging {
 
       case Year(child) => buildExtScalarFunction("Year", child :: Nil, DateType)
       case Month(child) => buildExtScalarFunction("Month", child :: Nil, DateType)
-      case Days(child) => buildExtScalarFunction("Day", child :: Nil, DateType)
+      case DayOfMonth(child) => buildExtScalarFunction("Day", child :: Nil, DateType)
 
       // startswith is converted to scalar function in pruning-expr mode
       case StartsWith(expr, Literal(prefix, StringType)) if isPruningExpr =>