[GH-2640] Simplify warning messages of SedonaContext.create() (#2698)

Author: jiayuasu

spark/common/src/main/scala/org/apache/sedona/sql/RasterRegistrator.scala

@@ -31,9 +31,13 @@ object RasterRegistrator {
   def registerAll(sparkSession: SparkSession): Unit = {
     if (isGeoToolsAvailable) {
       RasterUdtRegistratorWrapper.registerAll(gridClassName)
-      sparkSession.udf.register(
-        RasterUdafCatalog.rasterAggregateExpression.getClass.getSimpleName,
-        functions.udaf(RasterUdafCatalog.rasterAggregateExpression))
+      val functionName = RasterUdafCatalog.rasterAggregateExpression.getClass.getSimpleName
+      val functionIdentifier = FunctionIdentifier(functionName)
+      if (!sparkSession.sessionState.functionRegistry.functionExists(functionIdentifier)) {
+        sparkSession.udf.register(
+          functionName,
+          functions.udaf(RasterUdafCatalog.rasterAggregateExpression))
+      }
     }
   }
 

spark/common/src/main/scala/org/apache/spark/sql/sedona_sql/UDT/RasterUdtRegistratorWrapper.scala

@@ -23,6 +23,8 @@ import org.apache.spark.sql.types.UDTRegistration
 object RasterUdtRegistratorWrapper {
 
   def registerAll(gridClassName: String): Unit = {
-    UDTRegistration.register(gridClassName, classOf[RasterUDT].getName)
+    if (!UDTRegistration.exists(gridClassName)) {
+      UDTRegistration.register(gridClassName, classOf[RasterUDT].getName)
+    }
   }
 }

spark/common/src/main/scala/org/apache/spark/sql/sedona_sql/UDT/UdtRegistratorWrapper.scala

@@ -26,8 +26,14 @@ import org.locationtech.jts.index.SpatialIndex
 object UdtRegistratorWrapper {
 
   def registerAll(): Unit = {
-    UDTRegistration.register(classOf[Geometry].getName, classOf[GeometryUDT].getName)
-    UDTRegistration.register(classOf[Geography].getName, classOf[GeographyUDT].getName)
-    UDTRegistration.register(classOf[SpatialIndex].getName, classOf[IndexUDT].getName)
+    registerIfNotExists(classOf[Geometry].getName, classOf[GeometryUDT].getName)
+    registerIfNotExists(classOf[Geography].getName, classOf[GeographyUDT].getName)
+    registerIfNotExists(classOf[SpatialIndex].getName, classOf[IndexUDT].getName)
+  }
+
+  private def registerIfNotExists(userClass: String, udtClass: String): Unit = {
+    if (!UDTRegistration.exists(userClass)) {
+      UDTRegistration.register(userClass, udtClass)
+    }
   }
 }

spark/common/src/main/scala/org/apache/spark/sql/sedona_viz/UDT/UdtRegistratorWrapper.scala

@@ -24,9 +24,13 @@ import org.apache.spark.sql.types.UDTRegistration
 
 object UdtRegistratorWrapper {
   def registerAll(): Unit = {
-    UDTRegistration.register(
-      classOf[ImageSerializableWrapper].getName,
-      classOf[ImageWrapperUDT].getName)
-    UDTRegistration.register(classOf[Pixel].getName, classOf[PixelUDT].getName)
+    if (!UDTRegistration.exists(classOf[ImageSerializableWrapper].getName)) {
+      UDTRegistration.register(
+        classOf[ImageSerializableWrapper].getName,
+        classOf[ImageWrapperUDT].getName)
+    }
+    if (!UDTRegistration.exists(classOf[Pixel].getName)) {
+      UDTRegistration.register(classOf[Pixel].getName, classOf[PixelUDT].getName)
+    }
   }
 }