Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/1941#discussion_r61735650
--- Diff:
flink-batch-connectors/flink-jdbc/src/main/java/org/apache/flink/api/java/io/jdbc/JDBCInputFormat.java
---
@@ -26,52 +26,69 @@
import java.sql.SQLException;
import java.sql.Statement;
-import org.apache.flink.api.common.io.NonParallelInput;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
import org.apache.flink.api.common.io.DefaultInputSplitAssigner;
import org.apache.flink.api.common.io.RichInputFormat;
import org.apache.flink.api.common.io.statistics.BaseStatistics;
+import org.apache.flink.api.java.io.RangeInputSplit;
+import org.apache.flink.api.java.io.GenericRow;
import org.apache.flink.api.java.tuple.Tuple;
import org.apache.flink.configuration.Configuration;
import org.apache.flink.core.io.GenericInputSplit;
import org.apache.flink.core.io.InputSplit;
import org.apache.flink.core.io.InputSplitAssigner;
-import org.apache.flink.types.NullValue;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
/**
* InputFormat to read data from a database and generate tuples.
* The InputFormat has to be configured using the supplied
InputFormatBuilder.
*
+ * Remark: split (if set) works only if the split column is numeric
+ *
* @param <OUT>
* @see Tuple
* @see DriverManager
*/
-public class JDBCInputFormat<OUT extends Tuple> extends
RichInputFormat<OUT, InputSplit> implements NonParallelInput {
- private static final long serialVersionUID = 1L;
+public class JDBCInputFormat extends RichInputFormat<GenericRow,
InputSplit> {
+ private static final long serialVersionUID = 1L;
private static final Logger LOG =
LoggerFactory.getLogger(JDBCInputFormat.class);
private String username;
private String password;
private String drivername;
private String dbURL;
- private String query;
+ private String queryTemplate;
private int resultSetType;
private int resultSetConcurrency;
private transient Connection dbConn;
private transient Statement statement;
private transient ResultSet resultSet;
-
- private int[] columnTypes = null;
+
+ private String splitColumnName;
+ private long max;
+ private long min;
+ private long fetchSize;
+
+ private boolean hasNext = true;
+
+ private static final String BETWEEN = "(%s BETWEEN %s AND %s)";
+ public static final String CONDITIONS = "$CONDITIONS";
public JDBCInputFormat() {
}
@Override
public void configure(Configuration parameters) {
+ //called once per inputFormat (on open)
+ try {
+ establishConnection();
--- End diff --
Use the new method in `RichInputFormat` (`openInputFormat()` and
`closeInputFormat()`)
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