zjffdu commented on a change in pull request #3301: ZEPPELIN-3975. Add limit
local property for SparkInterpreter and JdbcInterpreter
URL: https://github.com/apache/zeppelin/pull/3301#discussion_r255384380
##########
File path:
spark/spark1-shims/src/main/scala/org/apache/zeppelin/spark/Spark1Shims.java
##########
@@ -56,23 +56,27 @@ public String showDataFrame(Object obj, int maxResult) {
if (obj instanceof DataFrame) {
DataFrame df = (DataFrame) obj;
String[] columns = df.columns();
+ // fetch maxResult+1 rows so that we can check whether it is larger than
zeppelin.spark.maxResult
List<Row> rows = df.takeAsList(maxResult + 1);
-
StringBuilder msg = new StringBuilder();
msg.append("%table ");
msg.append(StringUtils.join(columns, "\t"));
msg.append("\n");
+ boolean isLargerThanMaxResult = rows.size() > maxResult;
+ if (isLargerThanMaxResult) {
+ rows = rows.subList(0, maxResult);
+ }
for (Row row : rows) {
for (int i = 0; i < row.size(); ++i) {
msg.append(row.get(i));
- if (i != row.size() - 1) {
+ if (i != row.size() -1) {
Review comment:
fixed
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