这个官方例子中，怎么知道哪些数据会写到["id", "name"]这两列？？

```
{
"job": {
"setting": {
"speed": {
"channel": 1
}
},
"content": [
{
"reader": {
"name": "streamreader",
"parameter": {
"column" : [
{
"value": "DataX",
"type": "string"
},
{
"value": 19880808,
"type": "long"
},
{
"value": "1988-08-08 08:08:08",
"type": "date"
},
{
"value": true,
"type": "bool"
},
{
"value": "test",
"type": "bytes"
}
],
"sliceRecordCount": 1000
}
},
"writer": {
"name": "postgresqlwriter",
"parameter": {
"username": "xx",
"password": "xx",
"column": [
"id",
"name"
],
"preSql": [
"delete from test"
],
"connection": [
{
"jdbcUrl": "jdbc:postgresql://127.0.0.1:3002/datax",
"table": [
"test"
]
}
]
}
}
}
]
}
}

```

Start with the official example in the issue and its postgresqlwriter configuration, then determine how the reader's column values correspond to the writer's column entries. Done means the example or accompanying documentation clearly explains which input values are written to id and name, including the ordering or mapping rule.

Written by the indexing model from the issue text.