PostgreSQL Error 2202H: Invalid TABLESAMPLE Argument

PostgreSQL error 2202H (invalid_tablesample_argument) occurs when you pass an out-of-range or otherwise invalid argument to a TABLESAMPLE method. The two built-in methods, BERNOULLI and SYSTEM , both require a percentage value strictly between 0 and 100 (inclusive boundaries vary by implementation). This error frequently catches developers off-guard when building dynamic sampling queries or migrating code from other databases.

Top 3 Causes

1. Sampling percentage is out of the valid range (0–100)

The most common cause is passing a value greater than 100 or less than or equal to 0.…