DSE SearchAnalytics with Scala error - apache-spark

Question

By refering to this link , I tried to query cassandra table in spark Dataframe
val spark = SparkSession
.builder()
.appName("CassandraSpark")
.config("spark.cassandra.connection.host", "127.0.0.1")
.config("spark.cassandra.connection.port", "9042")
.master("local[2]")
.getOrCreate();
The node which I'm using is SearchAnalytics node
With using this spark session , i tried sql query
val ss = spark.sql("select * from killr_video.videos where solr_query = '{\"q\":\"video_id:1\"}'")
Search indexing is already enabled on that table.
After running the program , here is the error i am getting
Exception in thread "main" org.apache.spark.sql.AnalysisException: Table or view not found: `killr_video`.`videos`; line 1 pos 14;
'Project [*]
+- 'UnresolvedRelation killr_video.videos
at org.apache.spark.sql.catalyst.analysis.package$AnalysisErrorAt.failAnalysis(package.scala:42)
at org.apache.spark.sql.catalyst.analysis.CheckAnalysis$$anonfun$checkAnalysis$1.apply(CheckAnalysis.scala:82)
at org.apache.spark.sql.catalyst.analysis.CheckAnalysis$$anonfun$checkAnalysis$1.apply(CheckAnalysis.scala:78)
at org.apache.spark.sql.catalyst.trees.TreeNode.foreachUp(TreeNode.scala:127)
at org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$foreachUp$1.apply(TreeNode.scala:126)
at org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$foreachUp$1.apply(TreeNode.scala:126)
at scala.collection.immutable.List.foreach(List.scala:392)
at org.apache.spark.sql.catalyst.trees.TreeNode.foreachUp(TreeNode.scala:126)
at org.apache.spark.sql.catalyst.analysis.CheckAnalysis$class.checkAnalysis(CheckAnalysis.scala:78)
at org.apache.spark.sql.catalyst.analysis.Analyzer.checkAnalysis(Analyzer.scala:91)
at org.apache.spark.sql.execution.QueryExecution.assertAnalyzed(QueryExecution.scala:52)
at org.apache.spark.sql.Dataset$.ofRows(Dataset.scala:66)
at org.apache.spark.sql.SparkSession.sql(SparkSession.scala:623)
at org.apache.spark.sql.SQLContext.sql(SQLContext.scala:691)
How can i get Cassandra data into Spark?

Answer 1

From this error message it looks like that you're running your code using the standalone Spark, not via DSE Analytics (via dse spark-submit, or dse spark).
In this case you need to register tables - DSE documentation describes how to do it for all tables, using dse client-tool & spark-sql:
dse client-tool --use-server-config spark sql-schema --all > output.sql
spark-sql --jars byos-5.1.jar -f output.sql
For my example, it looks like following:
USE test;
CREATE TABLE t122
USING org.apache.spark.sql.cassandra
OPTIONS (
keyspace "test",
table "t122",
pushdown "true");
Here is an example of solr_query that just works out of box if I run it in the spark-shell started with dse spark:
scala> val ss = spark.sql("select * from test.t122 where solr_query='{\"q\":\"t:t2\"}'").show
+---+----------+---+
| id|solr_query| t|
+---+----------+---+
| 2| null| t2|
+---+----------+---+
To make your life easier, it's better to use DSE Analytics, not the bring your own spark.