Revert "[SPARK-32018][SQL][3.0] UnsafeRow.setDecimal should set null …

…with overflowed value"

This reverts commit 9b6bea5.

sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeRow.java

@@ -288,7 +288,7 @@ public void setDecimal(int ordinal, Decimal value, int precision) {
       Platform.putLong(baseObject, baseOffset + cursor, 0L);
       Platform.putLong(baseObject, baseOffset + cursor + 8, 0L);
 
-      if (value == null || !value.changePrecision(precision, value.scale())) {
+      if (value == null) {
         setNullAt(ordinal);
         // keep the offset for future update
         Platform.putLong(baseObject, getFieldOffset(ordinal), cursor << 32);

sql/core/src/test/scala/org/apache/spark/sql/UnsafeRowSuite.scala

@@ -178,14 +178,4 @@ class UnsafeRowSuite extends SparkFunSuite {
     // Makes sure hashCode on unsafe array won't crash
     unsafeRow.getArray(0).hashCode()
   }
-
-  test("SPARK-32018: setDecimal with overflowed value") {
-    val d1 = new Decimal().set(BigDecimal("10000000000000000000")).toPrecision(38, 18)
-    val row = InternalRow.apply(d1)
-    val unsafeRow = UnsafeProjection.create(Array[DataType](DecimalType(38, 18))).apply(row)
-    assert(unsafeRow.getDecimal(0, 38, 18) === d1)
-    val d2 = (d1 * Decimal(10)).toPrecision(39, 18)
-    unsafeRow.setDecimal(0, d2, 38)
-    assert(unsafeRow.getDecimal(0, 38, 18) === null)
-  }
 }