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Converting String Values to Lowercase¶

Purpose¶

This String function converts the string value to lowercase letters

Prerequisites¶

Save this sample. If there is no syntax error, the following messages would be shown on the console

* Siddhi App StringExtensionSample successfully deployed.

Executing the Sample¶

Start the Siddhi application by clicking on 'Run'.
If the Siddhi application starts successfully, the following messages would be shown on the console.
```
* StringExtensionSample.siddhi - Started Successfully!
```

Testing the Sample¶

You can publish data event to the file, through event simulator. 1. Open event simulator by clicking on the second icon or press Ctrl+Shift+I. 2. In the Single Simulation tab of the panel, select values as follows: * Siddhi App Name: StringExtensionSample * Stream Name: SweetProductionStream 3. Enter following values in the fields and send.

name: CaKe
amount: 55.6

Viewing the Results¶

Messages similar to the following would be shown on the console.

INFO {io.siddhi.core.stream.output.sink.LogSink} - StringExtensionSample : OutputStream : Event{timestamp=1513760993921, data=[cake, 55.6], isExpired=false}

@App:name("StringExtensionSample")
@App:description('Converts the sweet name to lowercase letters.')


define stream SweetProductionStream (name string, amount double);

@sink(type='log')
define stream OutputStream(name string, amount double);

from SweetProductionStream
select str:lower(name) as name, amount
insert into OutputStream;

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