PostgreSQL - Table Partitioning
Consider a PostgreSQL table partitioned by RANGE on a column 'event_date' with partitions for years 2022 and 2023 only. What occurs if you insert a row with event_date = '2024-05-10'?
Consider a PostgreSQL table partitioned by RANGE on a column 'event_date' with partitions for years 2022 and 2023 only. What occurs if you insert a row with event_date = '2024-05-10'?
medium📝 query result Q4 of 15
Step-by-Step Solution
Solution:
Step 1: Understand range partitions
Range partitions require explicit partitions covering the inserted value's range.Step 2: Check partition coverage
Since partitions exist only for 2022 and 2023, no partition covers 2024-05-10.Step 3: Result of insert
Without a matching partition or default partition, PostgreSQL raises an error on insert.Final Answer:
The insert fails with an error due to missing partition for 2024 -> Option CQuick Check:
Missing partition causes insert failure [OK]
Quick Trick: Range partitions must cover all inserted values [OK]
Common Mistakes:
- Assuming PostgreSQL auto-creates missing partitions
- Believing rows go to nearest existing partition
- Forgetting default partition can catch unmatched rows
Master "Table Partitioning" in PostgreSQL
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