Fix MDEV-12520: Decimal values can be truncated for JDBC tables

  modified:   storage/connect/jdbconn.cpp

Fix bug. Date value was null when retrieved from a json expanded array.
  modified:   storage/connect/tabjson.cpp

storage/connect/jdbconn.cpp

@@ -1235,7 +1235,8 @@ void JDBConn::SetColumnValue(int rank, PSZ name, PVAL val)
 	case 12:          // VARCHAR
 	case -1:          // LONGVARCHAR
 	case 1:           // CHAR
-		if (jb)
+	case 3:           // DECIMAL
+		if (jb && ctyp != 3)
 			cn = (jstring)jb;
 		else if (!gmID(g, chrfldid, "StringField", "(ILjava/lang/String;)Ljava/lang/String;"))
 			cn = (jstring)env->CallObjectMethod(job, chrfldid, (jint)rank, jn);
@@ -1261,7 +1262,7 @@ void JDBConn::SetColumnValue(int rank, PSZ name, PVAL val)
 		break;
 	case 8:           // DOUBLE
 	case 2:           // NUMERIC
-	case 3:           // DECIMAL
+//case 3:           // DECIMAL
 		if (!gmID(g, dblfldid, "DoubleField", "(ILjava/lang/String;)D"))
 			val->SetValue((double)env->CallDoubleMethod(job, dblfldid, rank, jn));
 		else

storage/connect/tabjson.cpp

@@ -1171,6 +1171,7 @@ void JSONCOL::SetJsonValue(PGLOBAL g, PVAL vp, PJVAL val, int n)
       case TYPE_INTG:
 			case TYPE_BINT:
 			case TYPE_DBL:
+			case TYPE_DATE:
         vp->SetValue_pval(val->GetValue());
         break;
       case TYPE_BOOL: