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[ZEPPELIN-2245] documentation for usage of precode

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Tinkoff DWH 2017-03-12 23:59:32 +05:00
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docs/interpreter/jdbc.md
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@ -222,6 +222,67 @@ SELECT name, country, performer
FROM demo.performers
WHERE name='{{"{{performer=Sheryl Crow|Doof|Fanfarlo|Los Paranoia"}}}}'
```
### Usage `precode`
You can set `precode` for each data source. Code runs once while opening the connection.
##### Properties
<table class="table-configuration">
<tr>
<th>Property Name</th>
<th>Value</th>
</tr>
<tr>
<td>default.driver</td>
<td>org.postgresql.Driver</td>
</tr>
<tr>
<td>default.password</td>
<td>1</td>
</tr>
<tr>
<td>default.url</td>
<td>jdbc:postgresql://localhost:5432/</td>
</tr>
<tr>
<td>default.user</td>
<td>postgres</td>
</tr>
<tr>
<td>default.precode</td>
<td>set search_path='test_path'</td>
</tr>
<tr>
<td>mysql.driver</td>
<td>com.mysql.jdbc.Driver</td>
</tr>
<tr>
<td>mysql.password</td>
<td>1</td>
</tr>
<tr>
<td>mysql.url</td>
<td>jdbc:mysql://localhost:3306/</td>
</tr>
<tr>
<td>mysql.user</td>
<td>root</td>
</tr>
<tr>
<td>mysql.precode</td>
<td>set @v=12</td>
</tr>
</table>
##### Usage
```sql
%jdbc
show search_path
```
```sql
%jdbc(mysql)
select @v
```
## Examples
Here are some examples you can refer to. Including the below connectors, you can connect every databases as long as it can be configured with it's JDBC driver.