# Column exists
##  Column exists
### Description
The Column Exists transforms allows you to verify the existence of a specific column in a database table.
| Hop Engine | ✓ |
| ---------- | ------------ |
| Spark | ? |
| Flink | ? |
| Dataflow | ? |
### Options
| Option | Description |
| ------------------- | ---------------------------------------------------------------------- |
| Transform name | Name of the transform; This name has to be unique in a single pipeline |
| Connection | The database connection to use |
| Schema name | (optional) The schema name of the table of the column to check |
| Table name | The name of the table of the column to check |
| Tablename in field? | Enable to read the name of the table in an input field |
| Tablename field | Specify the fieldns containing parameters and the parameter type |
| Columnname field | The name of the column field in the input stream |
| Result fieldname | The name of the resulting boolean flag field |
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