72 lines
5.2 KiB
Markdown
72 lines
5.2 KiB
Markdown
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SHOW EXTERNAL FUNCTION
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======================
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Synopsis
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--------
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``` sql
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SHOW EXTERNAL FUNCTION function_name [ ( parameter_type[, ...] ) ]
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```
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Description
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-----------
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Show the `external function` information which have been registered in our system.
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If parameter type list is omitted, show one row for each signature with the given `function_name`.
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Example
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-------
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Show the `external function` information of `example.default.format(double, integer)`:
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``` sql
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show external function example.default.format(double, integer);
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```
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``` sql
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External Function | Argument Types
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--------------------------------------------------------------------------------------------------------------------------------------------+-----------------
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External FUNCTION example.default.format ( | double, integer
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k double, |
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h integer |
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) |
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RETURNS varchar |
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COMMENT 'format the number ''num'' to a format like''#,###,###.##'', rounded to ''lo'' decimal places, and returns the result as a string' |
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DETERMINISTIC |
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RETURNS NULL ON NULL INPUT |
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EXTERNAL
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```
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Show the `external function` information of `example.default.format`:
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``` sql
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show external function example.default.format;
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```
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``` sql
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External Function | Argument Types
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--------------------------------------------------------------------------------------------------------------------------------------------+-----------------
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External FUNCTION example.default.format ( | double, integer
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k double, |
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h integer |
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) |
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RETURNS varchar |
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COMMENT 'format the number ''num'' to a format like''#,###,###.##'', rounded to ''lo'' decimal places, and returns the result as a string' |
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DETERMINISTIC |
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RETURNS NULL ON NULL INPUT |
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EXTERNAL
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External FUNCTION example.default.format ( | real, integer
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k real, |
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h integer |
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) |
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RETURNS varchar |
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COMMENT 'format the number ''num'' to a format like''#,###,###.##'', rounded to ''lo'' decimal places, and returns the result as a string' |
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DETERMINISTIC |
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RETURNS NULL ON NULL INPUT |
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EXTERNAL
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```
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See Also
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--------
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[Function Namespace Managers](../admin/function-namespace-managers.md) |