GitHub user javadba opened a pull request:
https://github.com/apache/spark/pull/1586
SPARK-2686 Add Length support to Spark SQL and HQL and Strlen support to SQL
Syntactic, parsing, and operational support have been added for LEN(GTH)
and STRLEN functions.
Examples:
SQL:
import org.apache.spark.sql._
case class TestData(key: Int, value: String)
val sqlc = new SQLContext(sc)
import sqlc._
val testData: SchemaRDD = sqlc.sparkContext.parallelize(
(1 to 100).map(i => TestData(i, i.toString)))
testData.registerAsTable("testData")
sqlc.sql("select length(key) as key_len from testData order by key_len desc
limit 5").collect
res12: Array[org.apache.spark.sql.Row] = Array([3], [2], [2], [2], [2])
HQL:
val hc = new org.apache.spark.sql.hive.HiveContext(sc)
import hc._
hc.hql
hql("select length(grp) from simplex").collect
res14: Array[org.apache.spark.sql.Row] = Array([6], [6], [6], [6])
As far as codebase changes: they have been purposefully made similar to the
ones made for for adding SUBSTR(ING) from July 17:
SQLParser, Optimizer, Expression, stringOperations, and HiveQL were the
main classes changed. The testing suites affected are ConstantFolding and
ExpressionEvaluation.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/javadba/spark strlen
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/1586.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 #1586
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commit bb252380399c4146bb63b5d6cbc66234609bab11
Author: Stephen Boesch <java...@gmail.com>
Date: 2014-07-12T12:34:58Z
Support hbase-0.96-1.1 in SparkBuild
commit 947007305cb03515daa8738d3ad2063bcd226a3d
Author: Stephen Boesch <java...@gmail.com>
Date: 2014-07-12T12:56:38Z
overwrote sparkbuild
commit 9b6a6471e3c1f087c186a7597c63c7ef2707eaa3
Author: Stephen Boesch <java...@gmail.com>
Date: 2014-07-16T13:24:32Z
update pom.xml for hadoop-2.3-cdh50.0 and hbase 0.96.1.1
commit b04c4cbef3ecb5a6f13297391b55a36317ce957a
Author: Stephen Boesch <java...@gmail.com>
Date: 2014-07-16T13:24:40Z
Merge branch 'master' of https://github.com/apache/spark
commit 5d1cb0a449bbf1ea95272a45f2d030d5cad0195c
Author: Stephen Boesch <java...@gmail.com>
Date: 2014-07-23T04:33:25Z
SPARK-2638 MapOutputTracker concurrency improvement
commit 483479ac8ccb0c937da5d306fc4591aa974ed37b
Author: Stephen Boesch <java...@gmail.com>
Date: 2014-07-23T16:09:26Z
Mesos workaround
commit 30910b2daac974cd2dac82e8a1b20cd60348a632
Author: Stephen Boesch <java...@gmail.com>
Date: 2014-07-23T19:43:59Z
Merge remote-tracking branch 'upstream/master'
commit 7c675f8d8fc63c5f602c5a767e1215118e0f768c
Author: Stephen Boesch <java...@gmail.com>
Date: 2014-07-23T20:03:18Z
Merge branch 'master' of https://github.com/javadba/spark
commit d646a2e1113252d1955185e355da06ddb690b75f
Author: Stephen Boesch <java...@gmail.com>
Date: 2014-07-25T06:26:11Z
SPARK-2686 Add Length support to Spark SQL and HQL and Strlen support to SQL
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