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Data metric functions

INVALID_NUMERIC_TYPE_CAST_PERCENT (system data metric function)¶

Returns the percentage of non-NULL column values that cannot be parsed as numeric. 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_NUMERIC_TYPE_CAST_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 values in the quantity_str column that cannot be cast to a number:

SELECT SNOWFLAKE.CORE.INVALID_NUMERIC_TYPE_CAST_PERCENT(
  SELECT
    quantity_str
  FROM staging.tables.csv_imports
);