docs/sql-error-conditions-invalid-observed-metrics-error-class.md

---
layout: global
title: INVALID_OBSERVED_METRICS error class
displayTitle: INVALID_OBSERVED_METRICS error class
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[SQLSTATE: 42K0E](sql-error-conditions-sqlstates.html#class-42-syntax-error-or-access-rule-violation)

Invalid observed metrics.

This error class has the following derived error classes:

## AGGREGATE_EXPRESSION_WITH_DISTINCT_UNSUPPORTED

Aggregate expressions with DISTINCT are not allowed in observed metrics, but found: `<expr>`.

## AGGREGATE_EXPRESSION_WITH_FILTER_UNSUPPORTED

Aggregate expression with FILTER predicate are not allowed in observed metrics, but found: `<expr>`.

## MISSING_NAME

The observed metrics should be named: `<operator>`.

## NESTED_AGGREGATES_UNSUPPORTED

Nested aggregates are not allowed in observed metrics, but found: `<expr>`.

## NON_AGGREGATE_FUNC_ARG_IS_ATTRIBUTE

Attribute `<expr>` can only be used as an argument to an aggregate function.

## NON_AGGREGATE_FUNC_ARG_IS_NON_DETERMINISTIC

Non-deterministic expression `<expr>` can only be used as an argument to an aggregate function.

## WINDOW_EXPRESSIONS_UNSUPPORTED

Window expressions are not allowed in observed metrics, but found: `<expr>`.