PostgreSQL 22027 Error: Causes and Solutions Complete Guide

PostgreSQL Error 22027: Trim Error — Causes, Fixes, and Prevention

PostgreSQL error code 22027 (trim_error) occurs when the TRIM(), BTRIM(), LTRIM(), or RTRIM() functions receive invalid or incompatible arguments during execution. This error commonly surfaces during data cleansing operations, ETL pipelines, or when user-supplied input is passed directly into SQL without proper validation. Understanding its root causes can save significant debugging time in production environments.

Top 3 Causes

1. Passing Invalid or Empty Trim Characters

Supplying an empty string or NULL as the trim character set leads to unexpected behavior or a direct 22027 error.