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* 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.hcatalog.cli.SemanticAnalysis;
import java.io.IOException;
import java.io.Serializable;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.commons.lang.StringUtils;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hive.metastore.api.FieldSchema;
import org.apache.hadoop.hive.ql.exec.DDLTask;
import org.apache.hadoop.hive.ql.exec.Task;
import org.apache.hadoop.hive.ql.metadata.Hive;
import org.apache.hadoop.hive.ql.metadata.HiveException;
import org.apache.hadoop.hive.ql.metadata.HiveStorageHandler;
import org.apache.hadoop.hive.ql.metadata.Table;
import org.apache.hadoop.hive.ql.parse.ASTNode;
import org.apache.hadoop.hive.ql.parse.BaseSemanticAnalyzer;
import org.apache.hadoop.hive.ql.parse.HiveParser;
import org.apache.hadoop.hive.ql.parse.HiveSemanticAnalyzerHookContext;
import org.apache.hadoop.hive.ql.parse.SemanticException;
import org.apache.hadoop.hive.ql.parse.StorageFormat;
import org.apache.hadoop.hive.ql.plan.CreateTableDesc;
import org.apache.hadoop.hive.ql.security.authorization.Privilege;
import org.apache.hive.hcatalog.common.HCatConstants;
import org.apache.hive.hcatalog.common.HCatUtil;
final class CreateTableHook extends HCatSemanticAnalyzerBase {
private String tableName;
@Override
public ASTNode preAnalyze(HiveSemanticAnalyzerHookContext context,
ASTNode ast) throws SemanticException {
Hive db;
try {
db = context.getHive();
} catch (HiveException e) {
throw new SemanticException(
"Couldn't get Hive DB instance in semantic analysis phase.",
e);
}
// Analyze and create tbl properties object
int numCh = ast.getChildCount();
tableName = BaseSemanticAnalyzer.getUnescapedName((ASTNode) ast
.getChild(0));
boolean likeTable = false;
StorageFormat format = new StorageFormat(context.getConf());
for (int num = 1; num < numCh; num++) {
ASTNode child = (ASTNode) ast.getChild(num);
if (format.fillStorageFormat(child)) {
if (org.apache.commons.lang.StringUtils
.isNotEmpty(format.getStorageHandler())) {
return ast;
}
continue;
}
switch (child.getToken().getType()) {
case HiveParser.TOK_QUERY: // CTAS
throw new SemanticException(
"Operation not supported. Create table as " +
"Select is not a valid operation.");
case HiveParser.TOK_ALTERTABLE_BUCKETS:
break;
case HiveParser.TOK_LIKETABLE:
likeTable = true;
break;
case HiveParser.TOK_IFNOTEXISTS:
try {
List<String> tables = db.getTablesByPattern(tableName);
if (tables != null && tables.size() > 0) { // table
// exists
return ast;
}
} catch (HiveException e) {
throw new SemanticException(e);
}
break;
case HiveParser.TOK_TABLEPARTCOLS:
List<FieldSchema> partCols = BaseSemanticAnalyzer
.getColumns((ASTNode) child.getChild(0), false);
for (FieldSchema fs : partCols) {
if (!fs.getType().equalsIgnoreCase("string")) {
throw new SemanticException(
"Operation not supported. HCatalog only " +
"supports partition columns of type string. "
+ "For column: "
+ fs.getName()
+ " Found type: " + fs.getType());
}
}
break;
}
}
if (!likeTable && (format.getInputFormat() == null || format.getOutputFormat() == null)) {
throw new SemanticException(
"STORED AS specification is either incomplete or incorrect.");
}
return ast;
}
@Override
public void postAnalyze(HiveSemanticAnalyzerHookContext context,
List<Task<? extends Serializable>> rootTasks)
throws SemanticException {
if (rootTasks.size() == 0) {
// There will be no DDL task created in case if its CREATE TABLE IF
// NOT EXISTS
return;
}
CreateTableDesc desc = ((DDLTask) rootTasks.get(rootTasks.size() - 1))
.getWork().getCreateTblDesc();
if (desc == null) {
// Desc will be null if its CREATE TABLE LIKE. Desc will be
// contained in CreateTableLikeDesc. Currently, HCat disallows CTLT in
// pre-hook. So, desc can never be null.
return;
}
Map<String, String> tblProps = desc.getTblProps();
if (tblProps == null) {
// tblProps will be null if user didnt use tblprops in his CREATE
// TABLE cmd.
tblProps = new HashMap<String, String>();
}
// first check if we will allow the user to create table.
String storageHandler = desc.getStorageHandler();
if (StringUtils.isEmpty(storageHandler)) {
} else {
try {
HiveStorageHandler storageHandlerInst = HCatUtil
.getStorageHandler(context.getConf(),
desc.getStorageHandler(),
desc.getSerName(),
desc.getInputFormat(),
desc.getOutputFormat());
//Authorization checks are performed by the storageHandler.getAuthorizationProvider(), if
//StorageDelegationAuthorizationProvider is used.
} catch (IOException e) {
throw new SemanticException(e);
}
}
if (desc != null) {
try {
Table table = context.getHive().newTable(desc.getTableName());
if (desc.getLocation() != null) {
table.setDataLocation(new Path(desc.getLocation()));
}
if (desc.getStorageHandler() != null) {
table.setProperty(
org.apache.hadoop.hive.metastore.api.hive_metastoreConstants.META_TABLE_STORAGE,
desc.getStorageHandler());
}
for (Map.Entry<String, String> prop : tblProps.entrySet()) {
table.setProperty(prop.getKey(), prop.getValue());
}
for (Map.Entry<String, String> prop : desc.getSerdeProps().entrySet()) {
table.setSerdeParam(prop.getKey(), prop.getValue());
}
//TODO: set other Table properties as needed
//authorize against the table operation so that location permissions can be checked if any
if (HCatAuthUtil.isAuthorizationEnabled(context.getConf())) {
authorize(table, Privilege.CREATE);
}
} catch (HiveException ex) {
throw new SemanticException(ex);
}
}
desc.setTblProps(tblProps);
context.getConf().set(HCatConstants.HCAT_CREATE_TBL_NAME, tableName);
}
}