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PostgreSQL LIKE vs ILIKE: The Ultimate Guide to Pattern Matching
"Pattern matching is a cornerstone of database querying. Whether you are building a search bar for an e-commerce platform, filtering user accounts by email domain, or generating reports from millions of unstructured text rows, finding specific text patterns is a daily requirement. In PostgreSQL, two of the most frequently used operators for this task are LIKE and ILIKE. While they may look nearly identical on the surface, choosing the wrong one can lead to critical search bugs or severe application performance bottlenecks. Understanding how these operators behave, how they conform to relational database standards, and how they interact with in..."
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