Categories:: Data metric functions

INVALID_JSON_PERCENT (system data metric function)¶

Returns the percentage of non-NULL column values that are not valid JSON. The percentage is computed over the total row count, including NULL values in the denominator.

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_PERCENT(<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 FLOAT value.

Example¶

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

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