PostgreSQL 02000 Error: Causes and Solutions Complete Guide

PostgreSQL Error 02000: No Data

PostgreSQL SQLSTATE 02000 ("no data") occurs when a query or cursor operation returns no rows in a context where data retrieval was attempted. This is most commonly encountered inside PL/pgSQL functions when using SELECT INTO, FETCH from a cursor, or any operation expecting at least one result row. While not a critical system error, unhandled "no data" conditions can silently corrupt business logic.

Top 3 Causes

1. SELECT INTO with No Matching Rows

When using SELECT INTO inside a PL/pgSQL block, if no rows match the WHERE clause, the target variable is set to NULL. With the STRICT modifier, PostgreSQL explicitly raises a NO_DATA_FOUND (P0002) exception derived from 02000.