How to Achieve Pruning When Querying by Non-Partitioned Columns in PostgreSQL
Read OriginalThis article explores how to achieve partition pruning in PostgreSQL even when querying by non-partition key columns, challenging conventional wisdom. It covers table partitioning basics, pruning for partition keys, local and global indexes, and the constraint_exclusion parameter. The author demonstrates practical tricks using outlier handling and gaps-and-islands patterns to optimize queries on partitioned tables, particularly for event logging systems. Aimed at database developers and DBAs, the guide provides SQL examples and strategies to improve query performance without changing the partition key.
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