update

Author: gengliangwang

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) {
+      if (value == null || !value.changePrecision(precision, value.scale())) {
         setNullAt(ordinal);
         // keep the offset for future update
         Platform.putLong(baseObject, getFieldOffset(ordinal), cursor << 32);