asfgit closed pull request #1539: DRILL-6847: Add Query Metadata to RESTful
Interface
URL: https://github.com/apache/drill/pull/1539
This is a PR merged from a forked repository.
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diff --git
a/exec/java-exec/src/main/java/org/apache/drill/exec/server/rest/QueryWrapper.java
b/exec/java-exec/src/main/java/org/apache/drill/exec/server/rest/QueryWrapper.java
index 4e0985852c2..4eb165660e2 100644
---
a/exec/java-exec/src/main/java/org/apache/drill/exec/server/rest/QueryWrapper.java
+++
b/exec/java-exec/src/main/java/org/apache/drill/exec/server/rest/QueryWrapper.java
@@ -115,7 +115,7 @@ public QueryResult run(final WorkManager workManager, final
WebUserConnection we
}
// Return the QueryResult.
- return new QueryResult(queryId, webUserConnection.columns,
webUserConnection.results);
+ return new QueryResult(queryId, webUserConnection,
webUserConnection.results);
}
//Detect possible excess heap
@@ -127,12 +127,15 @@ private float getHeapUsage() {
private final String queryId;
public final Collection<String> columns;
public final List<Map<String, String>> rows;
-
- public QueryResult(QueryId queryId, Collection<String> columns,
List<Map<String, String>> rows) {
- this.queryId = QueryIdHelper.getQueryId(queryId);
- this.columns = columns;
- this.rows = rows;
- }
+ public final List<String> metadata;
+
+ //DRILL-6847: Modified the constructor so that the method has access to
all the properties in webUserConnection
+ public QueryResult(QueryId queryId, WebUserConnection webUserConnection,
List<Map<String, String>> rows) {
+ this.queryId = QueryIdHelper.getQueryId(queryId);
+ this.columns = webUserConnection.columns;
+ this.metadata = webUserConnection.metadata;
+ this.rows = rows;
+ }
public String getQueryId() {
return queryId;
diff --git
a/exec/java-exec/src/main/java/org/apache/drill/exec/server/rest/WebUserConnection.java
b/exec/java-exec/src/main/java/org/apache/drill/exec/server/rest/WebUserConnection.java
index 9d6e7e41f42..b70dc7b8f82 100644
---
a/exec/java-exec/src/main/java/org/apache/drill/exec/server/rest/WebUserConnection.java
+++
b/exec/java-exec/src/main/java/org/apache/drill/exec/server/rest/WebUserConnection.java
@@ -37,10 +37,12 @@
import org.apache.drill.exec.rpc.RpcOutcomeListener;
import org.apache.drill.exec.rpc.user.UserSession;
import org.apache.drill.exec.vector.ValueVector.Accessor;
+import org.apache.drill.exec.record.MaterializedField;
import java.net.SocketAddress;
import java.util.List;
import java.util.Map;
+import java.util.ArrayList;
import java.util.Set;
/**
@@ -64,6 +66,8 @@
public final Set<String> columns = Sets.newLinkedHashSet();
+ public final List<String> metadata = new ArrayList<>();
+
WebUserConnection(WebSessionResources webSessionResources) {
this.webSessionResources = webSessionResources;
}
@@ -106,7 +110,29 @@ public void sendData(RpcOutcomeListener<Ack> listener,
QueryWritableBatch result
// TODO: Clean: DRILL-2933: That load(...) no longer throws
// SchemaChangeException, so check/clean catch clause below.
for (int i = 0; i < loader.getSchema().getFieldCount(); ++i) {
- columns.add(loader.getSchema().getColumn(i).getName());
+ //DRILL-6847: This section adds query metadata to the REST results
+ MaterializedField col = loader.getSchema().getColumn(i);
+ columns.add(col.getName());
+ StringBuilder dataType = new
StringBuilder(col.getType().getMinorType().name());
+
+ //For DECIMAL type
+ if (col.getType().hasPrecision()) {
+ dataType.append("(");
+ dataType.append(col.getType().getPrecision());
+
+ if (col.getType().hasScale()) {
+ dataType.append(", ");
+ dataType.append(col.getType().getScale());
+ }
+
+ dataType.append(")");
+ } else if (col.getType().hasWidth()) {
+ //Case for VARCHAR columns with specified width
+ dataType.append("(");
+ dataType.append(col.getType().getWidth());
+ dataType.append(")");
+ }
+ metadata.add(dataType.toString());
}
ValueVectorElementFormatter formatter = new
ValueVectorElementFormatter(webSessionResources.getSession().getOptions());
for (int i = 0; i < rows; ++i) {
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