The tag <call> also supports execution of R and Javascript. It can execute code stored in catalogue tables or code can be embedded in the <body> tag. Catalog tables are:
- wic_dbscripts_js for Javascript code
- wic_dbscripts_r for R code
Both catlog tables can be reached via the wic menu:
Business Logic > Server JS/R codeNew in 2019.1
This capability is available in versions 2019.1 onwards. Previous releases do not support execution of R and Javascript
1 call
Executes a javascript or R script on the server. Javascripts are stored in wic_dbscripts_js and R scripts in wic_dbscripts_r table
<call
name='name'
code='code'
type='type'
>
<args> ?
<arg /> *
</args>
<body /> ?
</call>
| Attributes | |||||
|---|---|---|---|---|---|
| Name | Type | Required | Default | Description | |
| Aname | string | Name of the function to invoke. The script must define a function with the same name as this attribute. | |||
| Acode | string |
Code of the catalogued script used the retrieve the source code of the script.
Javascripts are retrieved from wic_dbscripts_js whereas R Scripts are retrieved from wic_dbscripts_r.
If this attribute is null, then a body argument must be used.
|
|||
| Atype | string | Accepted values are js or r. | |||
| Arguments | |||||
|---|---|---|---|---|---|
| Name | Type | Required | Unique | Nullable | Description |
| Eargs | Arguments passed to the function invoked | ||||
| Earg | Argument | ||||
| Ebody | Código javascript. Éste debe estar contenido en una función que será invocada son los argumentos informados. | ||||
| Returns | |
|---|---|
| Type | Description |
| Resultado de la ejecución del script. Los tipos javascript son mapeados a tipos java. En particular, ls Arrays JS son mapeados java.util.List y los objetos JS són mapeados a java.util.Map. | |
Example
The following xsql script calls an embedded JS script and an embedded R script.
Copy
<xsql-script name='hello_world'>
<body>
<set name="m_result_js">
<call type="js" name='sayHiFromJS'>
<args>
<arg>Earth</arg>
</args>
<body><![CDATA[
function sayHiFromJS(name) {
return "Hello " + name + " from JS";
}
]]>
</body>
</call>
</set>
<set name="m_result_r">
<call type="r" name="sayHiFromR">
<args>
<arg>Mars</arg>
</args>
<body><![CDATA[
sayHiFromR <- function(name) {
d <- c("Hello", name, "from R")
return(paste(d, collapse=" "))
}
]]>
</body>
</call>
</set>
<println>
<m_result_js />
<m_result_r />
</println>
</body>
</xsql-script>
Hello Earth from JS
Hello Mars from R
Example
Execute a catalogued script:
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<xsql-script >
<body>
<println>
<return>
<call name='fibonacci' type="js">
<args>
<arg>10</arg>
</args>
</call>
</return>
</println>
</body>
</xsql-script>
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