PostgreSQL's TABLESAMPLE Error: Validation Pitfalls and Quick Fixes

PostgreSQL's Error 2202H frequently catches developers off-guard when building dynamic TABLESAMPLE queries or migrating code from other databases. Understanding the three common causes—out-of-range sampling percentages, unvalidated user input, and custom method argument mismatches—is critical for reliable data sampling. Implementing input validation and reusable wrapper functions can prevent this error entirely at runtime.