Oracle Writer

Data types

Oracle Writer supports most Oracle data types. Make sure that the data types of your database are supported.

Parameters

Configure Oracle Writer by using the codeless UI

1. Configure data sources.
   Configure Source and Target for the synchronization node.

   Parameter	Description
   Connection	The name of the data source to which you want to write data. This parameter is equivalent to the datasource parameter that is described in the preceding section.
   Table	The table to which you want to write data. This parameter is equivalent to the table parameter that is described in the preceding section.
   Statement Run Before Writing	The SQL statement that you want to execute before the synchronization node is run. This parameter is equivalent to the preSql parameter that is described in the preceding section.
   Statement Run After Writing	The SQL statement that you want to execute after the synchronization node is run. This parameter is equivalent to the postSql parameter that is described in the preceding section.
   Solution to Primary Key Violation	The write mode. This parameter is equivalent to the writeMode parameter that is described in the preceding section. You can select the desired write mode.

2. Configure field mapping. This operation is equivalent to setting the column parameter that is described in the preceding section. Fields in the source on the left have a one-to-one mapping with fields in the destination on the right.

   Operation	Description
   Map Fields with the Same Name	Click Map Fields with the Same Name to establish mappings between fields with the same name. The data types of the fields must match.
   Map Fields in the Same Line	Click Map Fields in the Same Line to establish mappings between fields in the same row. The data types of the fields must match.
   Delete All Mappings	Click Delete All Mappings to remove the mappings that are established.
   Auto Layout	Click Auto Layout. Then, the system automatically sorts the fields based on specific rules.

3. Configure channel control policies.

   Parameter	Description
   Expected Maximum Concurrency	The maximum number of parallel threads that the synchronization node uses to read data from the source or write data to the destination. You can configure the parallelism for the synchronization node on the codeless UI.
   Bandwidth Throttling	Specifies whether to enable bandwidth throttling. You can enable bandwidth throttling and specify a maximum transmission rate to prevent heavy read workloads on the source. We recommend that you enable bandwidth throttling and set the maximum transmission rate to an appropriate value based on the configurations of the source.
   Dirty Data Records Allowed	The maximum number of dirty data records allowed.

Configure Oracle Writer by using the code editor

{
    "type":"job",
    "version":"2.0",// The version number. 
    "steps":[
        { 
            "stepType":"stream",
            "parameter":{},
            "name":"Reader",
            "category":"reader"
        },
        {
            "stepType":"oracle",// The writer type. 
            "parameter":{
                "postSql":[],// The SQL statement that you want to execute after the synchronization node is run. 
                "datasource":"",
                "session":[],// The settings of the session to the database. 
                "column":[// The names of the columns to which you want to write data. 
                    "id",
                    "name"
                ],
                "encoding":"UTF-8",// The encoding format. 
                "batchSize":1024,// The number of data records to write at a time. 
                "table":"",// The name of the table to which you want to write data. 
                "preSql":[]// The SQL statement that you want to execute before the synchronization node is run. 
            },
            "name":"Writer",
            "category":"writer"
        }
    ],
    "setting":{
        "errorLimit":{
            "record":"0"// The maximum number of dirty data records allowed. 
        },
        "speed":{
            "throttle":true,// Specifies whether to enable bandwidth throttling. The value false indicates that bandwidth throttling is disabled, and the value true indicates that bandwidth throttling is enabled. The mbps parameter takes effect only when the throttle parameter is set to true.
            "concurrent":1, // The maximum number of parallel threads. 
            "mbps":"12"// The maximum transmission rate.
        }
    },
    "order":{
        "hops":[
            {
                "from":"Reader",
                "to":"Writer"
            }
        ]
    }
}