hbase support

src/main/java/com/alibaba/druid/hbase/HBaseConnection.java

@@ -1,5 +1,6 @@
 package com.alibaba.druid.hbase;
 
+import java.io.IOException;
 import java.sql.Array;
 import java.sql.Blob;
 import java.sql.CallableStatement;
@@ -22,6 +23,7 @@ import java.util.Properties;
 
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.hbase.client.HTable;
+import org.apache.hadoop.hbase.client.HTableInterface;
 import org.apache.hadoop.hbase.client.ResultScanner;
 import org.apache.hadoop.hbase.client.Scan;
 
@@ -244,6 +246,10 @@ public class HBaseConnection extends ConnectionBase implements Connection {
 
         return null;
     }
+    
+    public HTableInterface getHTable(String tableName) throws IOException {
+        return new HTable(config, tableName);
+    }
 
     public ResultSet executeQuery(HBaseStatementInterface jdbcHbaseStmt, String sql, List<Object> parameters) throws SQLException {
         try {
@@ -260,12 +266,12 @@ public class HBaseConnection extends ConnectionBase implements Connection {
             SQLExprTableSource tableSource = (SQLExprTableSource) selectQueryBlock.getFrom();
             String tableName = ((SQLIdentifierExpr) tableSource.getExpr()).getName();
 
-            HTable htable = new HTable(config, tableName);
+            HTableInterface htable = getHTable(tableName);
 
             Scan scan = new Scan();
             ResultScanner scanner = htable.getScanner(scan);
 
-            return new HBaseResultSet(jdbcHbaseStmt, scanner);
+            return new HBaseResultSet(jdbcHbaseStmt, htable, scanner);
         } catch (SQLException ex) {
             throw ex;
         } catch (Exception ex) {

src/main/java/com/alibaba/druid/hbase/HBaseResultSet.java

@@ -5,22 +5,26 @@ import java.sql.ResultSetMetaData;
 import java.sql.SQLException;
 import java.sql.Statement;
 
+import org.apache.hadoop.hbase.client.HTableInterface;
 import org.apache.hadoop.hbase.client.Result;
 import org.apache.hadoop.hbase.client.ResultScanner;
 import org.apache.hadoop.hbase.util.Bytes;
 
 import com.alibaba.druid.common.jdbc.ResultSetBase;
+import com.alibaba.druid.util.JdbcUtils;
 
 public class HBaseResultSet extends ResultSetBase {
 
     private HBaseStatementInterface statement;
     private ResultScanner           scanner;
+    private HTableInterface         htable;
     private Result                  result;
     private byte[]                  family = Bytes.toBytes("d");
 
-    public HBaseResultSet(HBaseStatementInterface statement, ResultScanner scanner){
+    public HBaseResultSet(HBaseStatementInterface statement, HTableInterface htable, ResultScanner scanner){
         super(statement);
         this.statement = statement;
+        this.htable = htable;
         this.scanner = scanner;
     }
 
@@ -67,12 +71,12 @@ public class HBaseResultSet extends ResultSetBase {
         byte[] bytes = getBytes(columnName);
         return Bytes.toString(bytes);
     }
-    
+
     public byte[] getBytes(String columnName) throws SQLException {
         if ("@ROW".equals(columnName)) {
             return result.getRow();
         }
-        
+
         byte[] qualifier = Bytes.toBytes(columnName);
         byte[] value = result.getValue(family, qualifier);
         return value;
@@ -80,8 +84,9 @@ public class HBaseResultSet extends ResultSetBase {
 
     @Override
     public void close() throws SQLException {
+        JdbcUtils.close(scanner);
         try {
-            scanner.close();
+            htable.close();
         } catch (Exception ex) {
             throw new SQLException("close error", ex);
         }

src/main/java/com/alibaba/druid/hbase/exec/ExecutePlan.java

@@ -1,5 +1,9 @@
 package com.alibaba.druid.hbase.exec;
 
-public interface ExecutePlan {
+import java.util.List;
 
+import com.alibaba.druid.hbase.HBaseConnection;
+
+public interface ExecutePlan {
+    void execute(HBaseConnection connection, List<Object> paramerers);
 }

src/main/java/com/alibaba/druid/hbase/exec/SingleTableQueryExecutePlan.java

@@ -1,17 +1,25 @@
 package com.alibaba.druid.hbase.exec;
 
-import org.apache.hadoop.hbase.client.HTableInterface;
+import java.util.List;
+
+import com.alibaba.druid.hbase.HBaseConnection;
+
 
 public class SingleTableQueryExecutePlan implements ExecutePlan {
 
-    private HTableInterface htable;
+    private String tableName;
 
-    public HTableInterface getHtable() {
-        return htable;
+    public String getTableName() {
+        return tableName;
     }
 
-    public void setHtable(HTableInterface htable) {
-        this.htable = htable;
+    public void setTableName(String tableName) {
+        this.tableName = tableName;
+    }
+
+    @Override
+    public void execute(HBaseConnection connection, List<Object> paramerers) {
+        
     }
 
 }