Fix duplicate TABLE_TYPE listing for view from system.jdbc.tables

Author: agrawalreetika

presto-jdbc/src/test/java/com/facebook/presto/jdbc/TestJdbcConnection.java

@@ -187,6 +187,41 @@ public void testResetAutoCommit()
         }
     }
 
+    @Test
+    public void testTableType()
+            throws SQLException
+    {
+        try (Connection connection = createConnection()) {
+            assertThat(connection.getCatalog()).isEqualTo("hive");
+            assertThat(connection.getSchema()).isEqualTo("default");
+
+            try (Statement statement = connection.createStatement()) {
+                statement.execute("CREATE TABLE test_table_type (x bigint)");
+                statement.execute("CREATE VIEW table_type_view AS SELECT * FROM test_table_type");
+                ResultSet rs = statement.executeQuery("SELECT TABLE_NAME, TABLE_TYPE FROM system.jdbc.tables WHERE TABLE_SCHEM = 'default' AND TABLE_NAME = 'table_type_view'");
+                int rowCount = 0;
+                while (rs.next()) {
+                    assertEquals(rs.getString("TABLE_NAME"), "table_type_view");
+                    assertEquals(rs.getString("TABLE_TYPE"), "VIEW");
+                    rowCount++;
+                }
+                assertEquals(rowCount, 1);
+
+                rowCount = 0;
+                rs = statement.executeQuery("SELECT TABLE_NAME, TABLE_TYPE FROM system.jdbc.tables WHERE TABLE_SCHEM = 'default' AND TABLE_NAME = 'test_table_type'");
+                while (rs.next()) {
+                    assertEquals(rs.getString("TABLE_NAME"), "test_table_type");
+                    assertEquals(rs.getString("TABLE_TYPE"), "TABLE");
+                    rowCount++;
+                }
+                assertEquals(rowCount, 1);
+
+                statement.execute("DROP TABLE test_table_type");
+                statement.execute("DROP VIEW table_type_view");
+            }
+        }
+    }
+
     @Test
     public void testRollback()
             throws SQLException

presto-main/src/main/java/com/facebook/presto/connector/system/jdbc/TableJdbcTable.java

@@ -25,10 +25,12 @@
 import com.facebook.presto.spi.SchemaTableName;
 import com.facebook.presto.spi.connector.ConnectorTransactionHandle;
 import com.facebook.presto.spi.security.AccessControl;
+import com.google.common.collect.ImmutableSet;
 
 import javax.inject.Inject;
 
 import java.util.Optional;
+import java.util.Set;
 
 import static com.facebook.presto.common.type.VarcharType.createUnboundedVarcharType;
 import static com.facebook.presto.connector.system.SystemConnectorSessionUtil.toSession;
@@ -88,15 +90,19 @@ public RecordCursor cursor(ConnectorTransactionHandle transactionHandle, Connect
         for (String catalog : filter(listCatalogs(session, metadata, accessControl).keySet(), catalogFilter)) {
             QualifiedTablePrefix prefix = tablePrefix(catalog, schemaFilter, tableFilter);
 
-            if (FilterUtil.emptyOrEquals(typeFilter, "TABLE")) {
-                for (SchemaTableName name : listTables(session, metadata, accessControl, prefix)) {
-                    table.addRow(tableRow(catalog, name, "TABLE"));
+            Set<SchemaTableName> views = ImmutableSet.of();
+            if (FilterUtil.emptyOrEquals(typeFilter, "VIEW")) {
+                views = ImmutableSet.copyOf(listViews(session, metadata, accessControl, prefix));
+                for (SchemaTableName name : views) {
+                    table.addRow(tableRow(catalog, name, "VIEW"));
                 }
             }
 
-            if (FilterUtil.emptyOrEquals(typeFilter, "VIEW")) {
-                for (SchemaTableName name : listViews(session, metadata, accessControl, prefix)) {
-                    table.addRow(tableRow(catalog, name, "VIEW"));
+            if (FilterUtil.emptyOrEquals(typeFilter, "TABLE")) {
+                for (SchemaTableName name : listTables(session, metadata, accessControl, prefix)) {
+                    if (!views.contains(name)) {
+                        table.addRow(tableRow(catalog, name, "TABLE"));
+                    }
                 }
             }
         }