1 files changed, 148 insertions, 0 deletions
diff --git a/sql/hive-thriftserver/src/main/java/org/apache/hive/service/cli/operation/GetFunctionsOperation.java b/sql/hive-thriftserver/src/main/java/org/apache/hive/service/cli/operation/GetFunctionsOperation.java
new file mode 100644
index 0000000000..6df1e8a227
--- /dev/null
+++ b/sql/hive-thriftserver/src/main/java/org/apache/hive/service/cli/operation/GetFunctionsOperation.java
@@ -0,0 +1,148 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.hive.service.cli.operation;
+
+import java.sql.DatabaseMetaData;
+import java.util.List;
+import java.util.Set;
+
+import org.apache.hadoop.hive.metastore.IMetaStoreClient;
+import org.apache.hadoop.hive.metastore.api.MetaException;
+import org.apache.hadoop.hive.ql.exec.FunctionInfo;
+import org.apache.hadoop.hive.ql.exec.FunctionRegistry;
+import org.apache.hadoop.hive.ql.security.authorization.plugin.HiveOperationType;
+import org.apache.hadoop.hive.ql.security.authorization.plugin.HivePrivilegeObject;
+import org.apache.hadoop.hive.ql.security.authorization.plugin.HivePrivilegeObjectUtils;
+import org.apache.hive.service.cli.CLIServiceUtils;
+import org.apache.hive.service.cli.FetchOrientation;
+import org.apache.hive.service.cli.HiveSQLException;
+import org.apache.hive.service.cli.OperationState;
+import org.apache.hive.service.cli.OperationType;
+import org.apache.hive.service.cli.RowSet;
+import org.apache.hive.service.cli.RowSetFactory;
+import org.apache.hive.service.cli.TableSchema;
+import org.apache.hive.service.cli.Type;
+import org.apache.hive.service.cli.session.HiveSession;
+import org.apache.thrift.TException;
+
+/**
+ * GetFunctionsOperation.
+ *
+ */
+public class GetFunctionsOperation extends MetadataOperation {
+  private static final TableSchema RESULT_SET_SCHEMA = new TableSchema()
+  .addPrimitiveColumn("FUNCTION_CAT", Type.STRING_TYPE,
+      "Function catalog (may be null)")
+  .addPrimitiveColumn("FUNCTION_SCHEM", Type.STRING_TYPE,
+      "Function schema (may be null)")
+  .addPrimitiveColumn("FUNCTION_NAME", Type.STRING_TYPE,
+      "Function name. This is the name used to invoke the function")
+  .addPrimitiveColumn("REMARKS", Type.STRING_TYPE,
+      "Explanatory comment on the function")
+  .addPrimitiveColumn("FUNCTION_TYPE", Type.INT_TYPE,
+      "Kind of function.")
+  .addPrimitiveColumn("SPECIFIC_NAME", Type.STRING_TYPE,
+      "The name which uniquely identifies this function within its schema");
+
+  private final String catalogName;
+  private final String schemaName;
+  private final String functionName;
+
+  private final RowSet rowSet;
+
+  public GetFunctionsOperation(HiveSession parentSession,
+      String catalogName, String schemaName, String functionName) {
+    super(parentSession, OperationType.GET_FUNCTIONS);
+    this.catalogName = catalogName;
+    this.schemaName = schemaName;
+    this.functionName = functionName;
+    this.rowSet = RowSetFactory.create(RESULT_SET_SCHEMA, getProtocolVersion());
+  }
+
+  @Override
+  public void runInternal() throws HiveSQLException {
+    setState(OperationState.RUNNING);
+    if (isAuthV2Enabled()) {
+      // get databases for schema pattern
+      IMetaStoreClient metastoreClient = getParentSession().getMetaStoreClient();
+      String schemaPattern = convertSchemaPattern(schemaName);
+      List<String> matchingDbs;
+      try {
+        matchingDbs = metastoreClient.getDatabases(schemaPattern);
+      } catch (TException e) {
+        setState(OperationState.ERROR);
+        throw new HiveSQLException(e);
+      }
+      // authorize this call on the schema objects
+      List<HivePrivilegeObject> privObjs = HivePrivilegeObjectUtils
+          .getHivePrivDbObjects(matchingDbs);
+      String cmdStr = "catalog : " + catalogName + ", schemaPattern : " + schemaName;
+      authorizeMetaGets(HiveOperationType.GET_FUNCTIONS, privObjs, cmdStr);
+    }
+
+    try {
+      if ((null == catalogName || "".equals(catalogName))
+          && (null == schemaName || "".equals(schemaName))) {
+        Set<String> functionNames =  FunctionRegistry
+            .getFunctionNames(CLIServiceUtils.patternToRegex(functionName));
+        for (String functionName : functionNames) {
+          FunctionInfo functionInfo = FunctionRegistry.getFunctionInfo(functionName);
+          Object rowData[] = new Object[] {
+              null, // FUNCTION_CAT
+              null, // FUNCTION_SCHEM
+              functionInfo.getDisplayName(), // FUNCTION_NAME
+              "", // REMARKS
+              (functionInfo.isGenericUDTF() ?
+                  DatabaseMetaData.functionReturnsTable
+                  : DatabaseMetaData.functionNoTable), // FUNCTION_TYPE
+             functionInfo.getClass().getCanonicalName()
+          };
+          rowSet.addRow(rowData);
+        }
+      }
+      setState(OperationState.FINISHED);
+    } catch (Exception e) {
+      setState(OperationState.ERROR);
+      throw new HiveSQLException(e);
+    }
+  }
+
+
+  /* (non-Javadoc)
+   * @see org.apache.hive.service.cli.Operation#getResultSetSchema()
+   */
+  @Override
+  public TableSchema getResultSetSchema() throws HiveSQLException {
+    assertState(OperationState.FINISHED);
+    return RESULT_SET_SCHEMA;
+  }
+
+  /* (non-Javadoc)
+   * @see org.apache.hive.service.cli.Operation#getNextRowSet(org.apache.hive.service.cli.FetchOrientation, long)
+   */
+  @Override
+  public RowSet getNextRowSet(FetchOrientation orientation, long maxRows) throws HiveSQLException {
+    assertState(OperationState.FINISHED);
+    validateDefaultFetchOrientation(orientation);
+    if (orientation.equals(FetchOrientation.FETCH_FIRST)) {
+      rowSet.setStartOffset(0);
+    }
+    return rowSet.extractSubset((int)maxRows);
+  }
+}