Github user sansanichfb commented on a diff in the pull request:
https://github.com/apache/incubator-hawq/pull/1261#discussion_r124894489
--- Diff:
pxf/pxf-api/src/main/java/org/apache/hawq/pxf/api/examples/DummyResolver.java
---
@@ -0,0 +1,29 @@
+package org.apache.hawq.pxf.api.examples;
+
+import org.apache.hawq.pxf.api.OneField;
+import org.apache.hawq.pxf.api.OneRow;
+import org.apache.hawq.pxf.api.ReadResolver;
+import org.apache.hawq.pxf.api.utilities.InputData;
+import org.apache.hawq.pxf.api.utilities.Plugin;
+import java.util.LinkedList;
+import java.util.List;
+import static org.apache.hawq.pxf.api.io.DataType.INTEGER;
+import static org.apache.hawq.pxf.api.io.DataType.VARCHAR;
+
+public class DummyResolver extends Plugin implements ReadResolver {
+ private int rowNumber;
+ public DummyResolver(InputData metaData) {
+ super(metaData);
+ rowNumber = 0;
+ }
+ @Override
+ public List<OneField> getFields(OneRow row) throws Exception {
--- End diff --
This resolver returns static schema with two columns, let's return dynamic
schema, which comes as a BridgeApi parameters. Please refer to
InputData#getColumn(int index) and InputData#getColumns() method to get
requested column's metadata.
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