org.apache.hadoop.mapreduce.lib.db
Interface DBSplitter
- All Known Implementing Classes:
- 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.
Method Summary |
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. |
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.
- Throws:
SQLException
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