GitHub user WeichenXu123 opened a pull request:
https://github.com/apache/spark/pull/12987
[spark-15212][SQL]CSV file reader when read file with first line schema do
not filter blank in schema column name
## What changes were proposed in this pull request?
When load csv file with schema, add schema column name string trim to avoid
blank problem.
## How was this patch tested?
construct csv data file contains schema definition with column blank such
as:
csv data file containsï¼
----------------------------------------------------------
col1, col2,col3,col4,col5
1997,Ford,E350,"ac, abs, moon",3000.00
....
------------------------------------------------------------
notice there is a blank before col2,
test command:
val sqlContext = new org.apache.spark.sql.SQLContext(sc);
var reader = sqlContext.read
reader.option("header", true)
var df = reader.csv("path/to/csvfile")
df.select("col2");//check if OK
df.registerTempTable("tab1");
sqlContext.sql("select col2 from tab1"); //check if OK.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/WeichenXu123/spark bugfix-15212
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/12987.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #12987
----
commit 56cc34f37c712d172df6fbc27b2823a571160cda
Author: WeichenXu <weichenxu...@outlook.com>
Date: 2016-05-08T12:52:09Z
fix bug: spark-15212
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