hetu-core/hetu-docs/en/sql/call.md

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CALL
====
Synopsis
--------
``` sql
CALL procedure_name ( [ name => ] expression [, ...] )
```
Description
-----------
Call a procedure.
Procedures can be provided by connectors to perform data manipulation or administrative tasks. For example, the `/connector/system` defines a procedure for killing a running query.
Some connectors, such as the [PostgreSQL Connector](../connector/postgresql.md), are for systems that have their own stored procedures. These stored procedures are separate from the connector-defined procedures discussed here and thus are not directly callable via `CALL`.
See connector documentation for details on available procedures.
Examples
--------
Call a procedure using positional arguments:
CALL test(123, 'apple');
Call a procedure using named arguments:
CALL test(name => 'apple', id => 123);
Call a procedure using a fully qualified name:
CALL catalog.schema.test();