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How do you inspect candidate logical plans of cost-based SQL optimizer in spark (scala)?

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#sql #apache-spark #cost-based-optimizer #catalyst-optimizer
3.9k
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What is the role of Catalyst optimizer and Project Tungsten

Published on
#apache-spark #apache-spark-sql #catalyst-optimizer
82
Views

Does Spark SQL optimize lower() on both sides?

Published on
#apache-spark #apache-spark-sql #catalyst-optimizer
250
Views

How to structure large queries in spark

Published on
#pyspark #apache-spark-sql #databricks #catalyst-optimizer
93
Views

Apache Spark What is the difference between requiredChildDistribution and outputPartitioning?

Published on
#scala #apache-spark #apache-spark-sql #hdfs #catalyst-optimizer
2.7k
Views

Dataframe API vs Spark.sql

Published on
#dataframe #apache-spark #catalyst-optimizer
1k
Views

How to create custom Spark-Native functions without forking/modifying Spark itself

Published on
#apache-spark #user-defined-functions #catalyst-optimizer
676
Views

Spark optimize "DataFrame.explain" / Catalyst

Published on
#apache-spark #optimization #internals #catalyst-optimizer
245
Views

Query Cassandra from Spark using CassandraSQLContext

Published on
#scala #apache-spark #cassandra #apache-spark-sql #catalyst-optimizer
130
Views

is it possible to avoid second exchange when spark joins two datasets using joinWith?

Published on
#apache-spark #join #apache-spark-dataset #catalyst-optimizer
4.9k
Views

Parquet filter pushdown is not working with Spark Dataset API

Published on
#apache-spark #apache-spark-sql #apache-spark-dataset #catalyst-optimizer
1.6k
Views

Export a spark logical/physical plan?

Published on
#apache-spark #apache-spark-sql #metastore #catalyst-optimizer
439
Views

Why would finding an aggregate of a partition column in Spark 3 take very long time?

Published on
#apache-spark #apache-spark-sql #spark3 #catalyst-optimizer
804
Views

Which optimizations do UDFs not benefit from?

Published on
#apache-spark #apache-spark-sql #catalyst-optimizer
205
Views

Spark internals: benefits of Project

Published on
#apache-spark #internals #catalyst-optimizer
109
Views

steps in spark physical plan not assigned to DAG step

Published on
#apache-spark #hive #cloudera #hortonworks-data-platform #catalyst-optimizer
1k
Views

spark register expression for SQL DSL

Published on
#scala #apache-spark #apache-spark-sql #catalyst-optimizer
219
Views

How can one use spark Catalyst?

Published on
#scala #apache-spark #apache-spark-sql #catalyst-optimizer
349
Views

Apache Spark dataframe lineage trimming via RDD and role of cache

Published on
#dataframe #apache-spark #rdd #data-lineage #catalyst-optimizer
767
Views

For "iterative algorithms," what is the advantage of converting to an RDD then back to a Dataframe

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#apache-spark #apache-spark-sql #rdd #catalyst-optimizer

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