Which condition in a WHERE clause will most likely enable partition pruning on a table partitioned by a date column?

easy📝 Conceptual Q2 of 15

PostgreSQL - Table Partitioning

AWHERE date_column = '2023-01-01'

BWHERE LOWER(text_column) = 'value'

CWHERE random() > 0.5

DWHERE date_column + INTERVAL '1 day' = '2023-01-02'

Step-by-Step Solution

Solution:

Step 1: Identify pruning-friendly conditions
Partition pruning works best with direct comparisons on partition key columns without functions.
Step 2: Evaluate options
WHERE date_column = '2023-01-01' uses a direct equality on the partitioned date column, enabling pruning. Options B, C, and D use functions or expressions that prevent pruning.
Final Answer:
WHERE date_column = '2023-01-01' -> Option A
Quick Check:
Direct partition key comparison = pruning enabled [OK]

Quick Trick: Use direct comparisons on partition keys for pruning [OK]

Common Mistakes:

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