Wildcard

What is a Wildcard?

A wildcard is a placeholder character used in queries to match patterns. Examples: shoe* → shoes, shoelace; ?at → cat, hat, mat.

How It Works (quick)

• (asterisk): Matches zero or more characters.
• ? (question mark): Matches exactly one character.
• Index cost: Expensive on large datasets—requires careful optimization.
• Applications: File search, database queries, e-commerce search.

Why It Matters in E-commerce

• Lets shoppers find variations (e.g., tee vs t-shirt).
• Useful for SKU/code matching with patterns.
• Risks overbroad matches → noisy results.

Best Practices

• Restrict wildcards to suffix/prefix positions.
• Limit query length with wildcards.
• Offer safer alternatives: fuzzy search, synonyms, autocomplete.
• Monitor performance and abuse attempts.

Summary

Wildcards are flexible query tools that match patterns. Use with care in e-commerce to help shoppers without overloading the system.