SOLR-8514, SOLR-8502: Implement StatementImpl.execute(String sql), StatementImpl.getResultSet(), and StatementImpl.getUpdateCount()

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1725662 13f79535-47bb-0310-9956-ffa450edef68

solr/solrj/src/java/org/apache/solr/client/solrj/io/sql/StatementImpl.java

@@ -45,6 +45,8 @@ class StatementImpl implements Statement {
   private final ConnectionImpl connection;
   private SolrStream solrStream;
   private boolean closed;
+  private String currentSQL;
+  private ResultSetImpl currentResultSet;
 
   StatementImpl(ConnectionImpl connection) {
     this.connection = connection;
@@ -56,14 +58,22 @@ class StatementImpl implements Statement {
 
   @Override
   public ResultSet executeQuery(String sql) throws SQLException {
+
     try {
+      if(this.currentResultSet != null) {
+        this.currentResultSet.close();
+        this.currentResultSet = null;
+        this.solrStream.close();
+      }
+
       closed = false;  // If closed reopen so Statement can be reused.
       this.solrStream = constructStream(sql);
       StreamContext context = new StreamContext();
       context.setSolrClientCache(this.connection.getSolrClientCache());
       this.solrStream.setStreamContext(context);
       this.solrStream.open();
-      return new ResultSetImpl(this);
+      this.currentResultSet = new ResultSetImpl(this);
+      return this.currentResultSet;
     } catch(Exception e) {
       throw new SQLException(e);
     }
@@ -183,17 +193,30 @@ class StatementImpl implements Statement {
 
   @Override
   public boolean execute(String sql) throws SQLException {
-    throw new UnsupportedOperationException();
+
+    if(this.currentResultSet != null) {
+      this.currentResultSet.close();
+      this.currentResultSet = null;
+    }
+
+    // TODO Add logic when update statements are added to JDBC.
+    this.currentSQL = sql;
+    return true;
   }
 
   @Override
   public ResultSet getResultSet() throws SQLException {
-    throw new UnsupportedOperationException();
+    return this.executeQuery(this.currentSQL);
   }
 
   @Override
   public int getUpdateCount() throws SQLException {
-    throw new UnsupportedOperationException();
+    if(isClosed()) {
+      throw new SQLException("Statement is closed");
+    }
+
+    // TODO Add logic when update statements are added to JDBC.
+    return -1;
   }
 
   @Override

solr/solrj/src/test/org/apache/solr/client/solrj/io/sql/JdbcTest.java

@@ -22,6 +22,7 @@ import java.sql.Connection;
 import java.sql.DatabaseMetaData;
 import java.sql.DriverManager;
 import java.sql.ResultSet;
+import java.sql.ResultSetMetaData;
 import java.sql.Statement;
 import java.util.Properties;
 
@@ -324,8 +325,41 @@ public class JdbcTest extends AbstractFullDistribZkTestBase {
 
         try (ResultSet rs = statement.executeQuery(sql)) {
           assertEquals(statement, rs.getStatement());
+
+          checkResultSetMetadata(rs);
+          checkResultSet(rs);
+        }
+
+        assertTrue(statement.execute(sql));
+        assertEquals(-1, statement.getUpdateCount());
+
+        try (ResultSet rs = statement.getResultSet()) {
+          assertEquals(statement, rs.getStatement());
+
+          checkResultSetMetadata(rs);
+          checkResultSet(rs);
         }
       }
     }
   }
+
+  private void checkResultSetMetadata(ResultSet rs) throws Exception {
+    ResultSetMetaData resultSetMetaData = rs.getMetaData();
+
+    assertNotNull(resultSetMetaData);
+  }
+
+  private void checkResultSet(ResultSet rs) throws Exception {
+    assertTrue(rs.next());
+    assertEquals(14, rs.getLong("a_i"));
+    assertEquals("hello0", rs.getString("a_s"));
+    assertEquals(10, rs.getDouble("a_f"), 0);
+
+    assertTrue(rs.next());
+    assertEquals(13, rs.getLong("a_i"));
+    assertEquals("hello3", rs.getString("a_s"));
+    assertEquals(9, rs.getDouble("a_f"), 0);
+
+    assertFalse(rs.next());
+  }
 }