apache spark - How to set catalog and database with pyspark.sql ...
Oct 18, 2024 · 1 I want to create a spark session w/ pyspark and update the session's catalog and database using the spark config, is this possible? Using config isn't working I tried to update …
How to insert, update rows in database from Spark Dataframe
Nov 17, 2021 · Where (1, 11) was updated (2, 22) was inserted (3, 33) wasn't changed I guess there are two possible solutions: Merge data in new DataFrame and fully rewrite table in …
How to use JDBC source to write and read data in (Py)Spark?
Jun 22, 2015 · How to optimize partitioning when migrating data from JDBC source?, How to improve performance for slow Spark jobs using DataFrame and JDBC connection? How to …
pyspark - Can Apache Spark be used as a database replacement?
Feb 7, 2020 · In fact, even for normal applications' SQL queries, you should prefer a database because Spark can be an inefficient alternative for typical, random access queries (it …
How to see all the databases and Tables in Databricks
Sep 22, 2020 · [ (table.database, table.name) for database in spark.catalog.listDatabases() for table in spark.catalog.listTables(database.name) ] to get the list of database and tables. EDIT: …
apache spark - Using pyspark to connect to PostgreSQL - Stack …
I am trying to connect to a database with pyspark and I am using the following code:
How to Read Data from DB in Spark in parallel - Stack Overflow
Feb 1, 2021 · 9 Saurabh, in order to read in parallel using the standard Spark JDBC data source support you need indeed to use the numPartitions option as you supposed. But you need to …
Read data from Oracle DB through Spark (pySpark)
Oct 15, 2022 · I am trying to read the data using pySpark and writing on to HDFS from Oracle Database. I am trying two different methods: Method 1: Using simple plain query with no …
apache spark - How to show all tables in all databases in …
Aug 30, 2020 · The output is a Spark SQL view which holds database name, table name, and column name. This is for all databases, all tables and all columns. You could extend it to have …
How to list all tables in database using Spark SQL?
Mar 30, 2017 · The answer to this question isn't actually spark specific. You'll just need to load the information_schema.tables. The information schema consists of a set of views that contain …