/// <exception cref="System.IO.IOException"/>
protected internal virtual RecordReader <LongWritable, T> CreateDBRecordReader(DBInputFormat.DBInputSplit
split, Configuration conf)
{
Type inputClass = (Type)(dbConf.GetInputClass());
try
{
// use database product name to determine appropriate record reader.
if (dbProductName.StartsWith("ORACLE"))
{
// use Oracle-specific db reader.
return(new OracleDBRecordReader <T>(split, inputClass, conf, CreateConnection(), GetDBConf
(), conditions, fieldNames, tableName));
}
else
{
if (dbProductName.StartsWith("MYSQL"))
{
// use MySQL-specific db reader.
return(new MySQLDBRecordReader <T>(split, inputClass, conf, CreateConnection(), GetDBConf
(), conditions, fieldNames, tableName));
}
else
{
// Generic reader.
return(new DBRecordReader <T>(split, inputClass, conf, CreateConnection(), GetDBConf
(), conditions, fieldNames, tableName));
}
}
}
catch (SQLException ex)
{
throw new IOException(ex.Message);
}
}
/// <exception cref="System.IO.IOException"/>
protected internal override RecordReader <LongWritable, T> CreateDBRecordReader(DBInputFormat.DBInputSplit
split, Configuration conf)
{
DBConfiguration dbConf = GetDBConf();
Type inputClass = (Type)(dbConf.GetInputClass());
string dbProductName = GetDBProductName();
Log.Debug("Creating db record reader for db product: " + dbProductName);
try
{
// use database product name to determine appropriate record reader.
if (dbProductName.StartsWith("MYSQL"))
{
// use MySQL-specific db reader.
return(new MySQLDataDrivenDBRecordReader <T>(split, inputClass, conf, CreateConnection
(), dbConf, dbConf.GetInputConditions(), dbConf.GetInputFieldNames(), dbConf.GetInputTableName
()));
}
else
{
// Generic reader.
return(new DataDrivenDBRecordReader <T>(split, inputClass, conf, CreateConnection(
), dbConf, dbConf.GetInputConditions(), dbConf.GetInputFieldNames(), dbConf.GetInputTableName
(), dbProductName));
}
}
catch (SQLException ex)
{
throw new IOException(ex.Message);
}
}
/// <exception cref="System.IO.IOException"/>
protected internal override RecordReader <LongWritable, T> CreateDBRecordReader(DBInputFormat.DBInputSplit
split, Configuration conf)
{
DBConfiguration dbConf = GetDBConf();
Type inputClass = (Type)(dbConf.GetInputClass());
try
{
// Use Oracle-specific db reader
return(new OracleDataDrivenDBRecordReader <T>(split, inputClass, conf, CreateConnection
(), dbConf, dbConf.GetInputConditions(), dbConf.GetInputFieldNames(), dbConf.GetInputTableName
()));
}
catch (SQLException ex)
{
throw new IOException(ex.Message);
}
}
