Phaneesh phaneesh
phaneesh
/ hiveQueryOptimizationTechniques.txt
Created
October 28, 2023 11:52
— forked from thanoojgithub/hiveQueryOptimizationTechniques.txt
hive query optimization techniques
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| https://github.com/Thomas-George-T/Movies-Analytics-in-Spark-and-Scala | |
| Change execution engine = Tez, spark ( set Tez/Spark client jars into HADOOP_CLASSPATH) | |
| Partitioning - PARTITIONED BY clause is used to divide the table into buckets. | |
| Buckting - CLUSTERED BY clause is used to divide the table into buckets. | |
| Map-Side join, Bucket-Map-Side join, Sorted Bucket-Map-Side join | |
| Usage of suitable file format = ORC(Optimized Row Columnar) file formate | |
| Indexing | |
| Vectorization along with ORC | |
| CBO |