PARAMETERS
Applies to: 
Databricks SQL Databricks Runtime 11.3 LTS and above Unity Catalog only
Preview
This feature is in Public Preview.
INFORMATION_SCHEMA.PARAMETERS lists the routine parameters within the catalog.
The rows returned are limited to the routines the user is privileged to interact with.
Definition
The PARAMETERS relation contains the following columns:
| Name | Data type | Nullable | Standard | Description |
|---|---|---|---|---|
SPECIFIC_CATALOG | STRING | No | Yes | Catalog containing the routine. |
SPECIFIC_SCHEMA | STRING | No | Yes | Database (schema) containing the routine. |
SPECIFIC_NAME | STRING | No | Yes | Schema unique (specific) name of the routine. |
ORDINAL_POSITION | INTEGER | No | Yes | The position (1-based) of the parameter in the routine parameter list. |
PARAMETER_MODE | STRING | No | Yes | Always 'IN'. Reserved for future use. |
IS_RESULT | STRING | No | Yes | Always 'NO'. Reserved for future use. |
AS_LOCATOR | STRING | No | Yes | Always 'NO'. Reserved for future use. |
PARAMETER_NAME | STRING | Yes | Yes | Name of the parameters, NULL if unnamed. |
DATA_TYPE | STRING | No | Yes | The parameter data type name. |
FULL_DATA_TYPE | STRING | No | No | The parameter data type definition, for example 'DECIMAL(10, 4)'. |
CHARACTER_MAXIMUM_LENGTH | INTEGER | Yes | Yes | Always NULL, reserved for future use. |
CHARACTER_OCTET_LENGTH | STRING | Yes | Yes | Always NULL, reserved for future use. |
NUMERIC_PRECISION | INTEGER | Yes | Yes | For base-2 integral numeric types, FLOAT, and DOUBLE, the number of supported bits. For DECIMAL the number of digits, NULL otherwise. |
NUMERIC_PRECISION_RADIX | INTEGER | Yes | Yes | For DECIMAL 10, for all other numeric types 2, NULL otherwise. |
NUMERIC_SCALE | INTEGER | Yes | Yes | For integral numeric types 0, for DECIMAL the number of digits to the right of the decimal point, NULL otherwise. |
DATETIME_PRECISION | INTEGER | Yes | Yes | For DATE 0, for TIMESTAMP, and INTERVAL … SECOND 3, any other INTERVAL 0, NULL otherwise. |
INTERVAL_TYPE | STRING | Yes | Yes | For INTERVAL the unit portion of the interval, e.g. 'YEAR TO MONTH', NULL otherwise. |
INTERVAL_PRECISION | INTERAL | Yes | Yes | Always NULL, reserved for future use. |
MAXIMUM_CARDINALITY | INTEGER | Yes | Yes | Always NULL, reserved for future use. |
PARAMETER_DEFAULT | STRING | Yes | Yes | Always NULL, reserved for future use. |
COMMENT | STRING | Yes | No | An optional comment describing the parameter. |
Constraints
The following constraints apply to the PARAMETERS relation:
| Class | Name | Column List | Description |
|---|---|---|---|
| Primary key | PARAMETERS_PK | SPECIFIC_CATALOG, SPECIFIC_SCHEMA, SPECIFIC_NAME, ORDINAL_POSITION | Uniquely identifies the parameter. |
| Foreign key | PARAMETERS_ROUTINES_FK | SPECIFIC_CATALOG, SPECIFIC_SCHEMA, SPECIFIC_NAME | References ROUTINES_PK |
Examples
SQL
> SELECT parameter_name, data_type
FROM information_schema.parameters
WHERE specific_schema = 'default'
AND specific_name = 'foo'
ORDER BY ordinal_position;