docs/sql-error-conditions-not-null-constraint-violation-error-class.md

---
layout: global
title: NOT_NULL_CONSTRAINT_VIOLATION error class
displayTitle: NOT_NULL_CONSTRAINT_VIOLATION error class
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[SQLSTATE: 42000](sql-error-conditions-sqlstates.html#class-42-syntax-error-or-access-rule-violation)

Assigning a NULL is not allowed here.

This error class has the following derived error classes:

## ARRAY_ELEMENT

The array `<columnPath>` is defined to contain only elements that are NOT NULL.

## MAP_VALUE

The map `<columnPath>` is defined to contain only values that are NOT NULL.