EC
42P10
PostgreSQLERRORNotableSyntax Error or Access Rule ViolationHIGH confidence

invalid column reference

What this means

SQLSTATE 42P10 is raised when a column reference is used in an invalid position in a query — for example, referencing an outer query column in a context where it is not allowed.

Why it happens
  1. 1Referencing a column from an outer query in a position where subquery correlation is not permitted
  2. 2Using a column reference in an aggregate function context where it is ambiguous
How to reproduce

Invalid correlated column reference.

expected output

ERROR:  invalid column reference

Fix

Restructure the query to use a lateral join or CTE

WHEN When a correlated column reference is needed.

Restructure the query to use a lateral join or CTE
SELECT o.*, latest.amount
FROM orders o
CROSS JOIN LATERAL (
  SELECT amount FROM payments WHERE order_id = o.id ORDER BY created_at DESC LIMIT 1
) latest;

Why this works

LATERAL allows subqueries to reference columns from the outer query, making correlated references valid.

Sources
Official documentation ↗

Class 42 — Syntax Error or Access Rule Violation (Postgres-specific)

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