org.apache.hadoop.mapreduce.lib.db

接口 DBSplitter

所有已知实现类:

BigDecimalSplitter, BooleanSplitter, DateSplitter, FloatSplitter, IntegerSplitter, OracleDateSplitter, TextSplitter

@InterfaceAudience.Public
@InterfaceStability.Evolving
public interface DBSplitter

DBSplitter will generate DBInputSplits to use with DataDrivenDBInputFormat. DataDrivenDBInputFormat needs to interpolate between two values that represent the lowest and highest valued records to import. Depending on the data-type of the column, this requires different behavior. DBSplitter implementations should perform this for a data type or family of data types.

方法概要

方法

限定符和类型	方法和说明
List<InputSplit>	split(Configuration conf, ResultSet results, String colName) Given a ResultSet containing one record (and already advanced to that record) with two columns (a low value, and a high value, both of the same type), determine a set of splits that span the given values.

方法详细资料

split

List<InputSplit> split(Configuration conf,
                     ResultSet results,
                     String colName)
                       throws SQLException

Given a ResultSet containing one record (and already advanced to that record) with two columns (a low value, and a high value, both of the same type), determine a set of splits that span the given values.

抛出:

SQLException