trait SupportsDelete extends AnyRef

A mix-in interface for Table delete support. Data sources can implement this interface to provide the ability to delete data from tables that matches filter expressions.

Since

3.0.0

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Abstract Value Members

  1. abstract def deleteWhere(filters: Array[Filter]): Unit

    Delete data from a data source table that matches filter expressions.

    Delete data from a data source table that matches filter expressions. Note that this method will be invoked only if #canDeleteWhere(Filter[]) returns true.

    Rows are deleted from the data source iff all of the filter expressions match. That is, the expressions must be interpreted as a set of filters that are ANDed together.

    Implementations may reject a delete operation if the delete isn't possible without significant effort. For example, partitioned data sources may reject deletes that do not filter by partition columns because the filter may require rewriting files without deleted records. To reject a delete implementations should throw IllegalArgumentException with a clear error message that identifies which expression was rejected.

    filters

    filter expressions, used to select rows to delete when all expressions match

    Exceptions thrown

    IllegalArgumentException If the delete is rejected due to required effort

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  1. final def !=(arg0: Any): Boolean
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  5. def canDeleteWhere(filters: Array[Filter]): Boolean

    Checks whether it is possible to delete data from a data source table that matches filter expressions.

    Checks whether it is possible to delete data from a data source table that matches filter expressions.

    Rows should be deleted from the data source iff all of the filter expressions match. That is, the expressions must be interpreted as a set of filters that are ANDed together.

    Spark will call this method at planning time to check whether #deleteWhere(Filter[]) would reject the delete operation because it requires significant effort. If this method returns false, Spark will not call #deleteWhere(Filter[]) and will try to rewrite the delete operation and produce row-level changes if the data source table supports deleting individual records.

    filters

    filter expressions, used to select rows to delete when all expressions match

    returns

    true if the delete operation can be performed

    Since

    3.1.0

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