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Spark reads all columns in filtering when using scala syntax

score 129 · Answer 1 · 2023-10-04T22:55:57.317000

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Spark reads all columns in filtering when using scala syntax

129 views Asked by jack At 04 October 2023 at 22:55

score 471 · Answer 2 · 2023-01-24T01:52:38.110000

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

471 views Asked by RyanCheu At 24 January 2023 at 01:52

score 281 · Answer 3 · 2022-12-17T21:54:20.930000

How to structure large queries in spark

281 views Asked by Zelazny7 At 17 December 2022 at 21:54

score 92 · Answer 4 · 2022-12-13T19:27:28.063000

Does Spark SQL optimize lower() on both sides?

92 views Asked by Kathmandude At 13 December 2022 at 19:27

score 109 · Answer 5 · 2022-04-22T13:23:38.403000

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

109 views Asked by wpunter At 22 April 2022 at 13:23

score 168 · Answer 6 · 2021-12-07T21:14:52.450000

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

168 views Asked by dpolaczanski At 07 December 2021 at 21:14

score 115 · Answer 7 · 2021-09-24T09:39:23.260000

Apache Spark What is the difference between requiredChildDistribution and outputPartitioning?

115 views Asked by Arjunlal M.A At 24 September 2021 at 09:39

score 384 · Answer 8 · 2021-07-20T07:18:30.553000

Apache Spark dataframe lineage trimming via RDD and role of cache

384 views Asked by alexanoid At 20 July 2021 at 07:18

score 3973 · Answer 9 · 2021-04-21T03:29:14.713000

What is the role of Catalyst optimizer and Project Tungsten

3.9k views Asked by Surendiran Balasubramanian At 21 April 2021 at 03:29

score 2787 · Answer 10 · 2021-02-24T17:55:36.513000

Dataframe API vs Spark.sql

2.7k views Asked by Vijaya Bhaskar At 24 February 2021 at 17:55

score 1685 · Answer 11 · 2020-06-09T15:26:25.853000

Export a spark logical/physical plan?

1.6k views Asked by Hamza EL KAROUI At 09 June 2020 at 15:26

score 57 · Answer 12 · 2020-04-29T01:23:10.673000

Is it possible to outperform the Catalyst optimizer on highly skewed data using only RDDs

57 views Asked by Allen Han At 29 April 2020 at 01:23

score 786 · Answer 13 · 2020-04-29T00:24:07.443000

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

786 views Asked by Allen Han At 29 April 2020 at 00:24

score 131 · Answer 14 · 2020-02-10T17:54:59.597000

steps in spark physical plan not assigned to DAG step

131 views Asked by user276537 At 10 February 2020 at 17:54

score 241 · Answer 15 · 2020-01-30T04:30:56.080000

Spark internals: benefits of Project

241 views Asked by Alon At 30 January 2020 at 04:30

score 83 · Answer 16 · 2020-01-22T19:24:16.453000

Long linear queries in Spark against a graph stored in Hive tables

83 views Asked by Anthony Arrascue At 22 January 2020 at 19:24

score 486 · Answer 17 · 2020-01-21T11:13:49.567000

Rewrite LogicalPlan to push down udf from aggregate

486 views Asked by adream307 At 21 January 2020 at 11:13

score 475 · Answer 18 · 2019-09-28T13:40:13.157000

What happened to the ability to visualize query plans in a Databricks notebook?

475 views Asked by mauna At 28 September 2019 at 13:40

score 702 · Answer 19 · 2019-09-01T20:11:58.440000

Spark optimize "DataFrame.explain" / Catalyst

702 views Asked by BiS At 01 September 2019 at 20:11

score 1064 · Answer 20 · 2019-08-22T09:34:28.713000

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

1k views Asked by cozos At 22 August 2019 at 09:34

TechQA.

List Question

Spark reads all columns in filtering when using scala syntax

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

How to structure large queries in spark

Does Spark SQL optimize lower() on both sides?

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

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

Apache Spark What is the difference between requiredChildDistribution and outputPartitioning?

Apache Spark dataframe lineage trimming via RDD and role of cache

What is the role of Catalyst optimizer and Project Tungsten

Dataframe API vs Spark.sql

Export a spark logical/physical plan?

Is it possible to outperform the Catalyst optimizer on highly skewed data using only RDDs

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

steps in spark physical plan not assigned to DAG step

Spark internals: benefits of Project

Long linear queries in Spark against a graph stored in Hive tables

Rewrite LogicalPlan to push down udf from aggregate

What happened to the ability to visualize query plans in a Databricks notebook?

Spark optimize "DataFrame.explain" / Catalyst

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

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