Categories:: Data metric functions

INVALID_JSON_COUNT (system data metric function)¶

Returns the count of non-NULL column values that are not valid JSON. Use this function to validate columns that are expected to contain JSON payloads.

This topic provides the syntax for calling the function directly. To learn how to associate the function with a table or view so it runs at regular intervals, see Associate a DMF.

Syntax¶

SNOWFLAKE.CORE.INVALID_JSON_COUNT(<query>)

Arguments¶

query: Specifies a SQL query that projects a single column.

Allowed data types¶

The column projected by the query must have the VARCHAR data type.

Returns¶

The function returns a NUMBER value. NULL values are excluded from the count.

Example¶

Measure the number of invalid JSON values in the payload column:

SELECT SNOWFLAKE.CORE.INVALID_JSON_COUNT(
  SELECT
    payload
  FROM events.tables.logs
);