* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. For the DB rename to work properly, we need to update three tables in the HMS DB. If property_name already exists, the old value is overwritten with property_value For more information, see ALTER DATABASE Database Mirroring, ALTER DATABASE SET HADR, and ALTER DATABASE Compatibility Level.Database scoped configurations are used to set several database configurations at the individual database level. SET DBPROPERTIES ('property_name'='property_value' [, ...] Specifies a property or properties for the database named property_name and establishes the value for each of the properties respectively as property_value. Contribute to apache/hive development by creating an account on GitHub. The database and schema are interchangeable. will return an empty set. I think the best is to use a script to check that using, and then to call beeline with an external script, HDFS: is value against fs.defaultFS property in core-site.xml ALTER DATABASE TestDB SET OWNER USER cloudera; Database Location: ALTER (DATABASE|SCHEMA) database_name SET LOCATION hdfs_path; Though it is documented that the database location can be changed, however it is not allowing to do so in Hive 1.1.0 in CDH 5.10.0 Database Name: ALTER DATABASE test_db RENAME TO test_db_new; Though this is also documented but renaming a database is not allowed in Hive … The location for external hive database is “/warehouse/tablespace/external/hive/” and the location for manage database is “/warehouse/tablespace/managed/hive”. SCHEMA in ALTER added in Hive 0.14.0. The reason is that the location property is only metadata, telling hive where to look without any effect on said location (except at creation time, where the location will be created if it does not exist for managed tables). Change location in the table properties using the following query ALTER TABLE table_name SET LOCATION "location_in_hdfs" (e.g "hdfs://bighdpope/data/raw/cag/Output") 2.) By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy. It sets the current database to be used for further hive operations. Let’s see how we can change database name without this patch. Is there a cyclic list manipulate function? Can someone explain the SN10 landing failure in layperson's terms? I figured out the error and fixed it. This developer built a…, hive: external partitioned table without location, Create HIVE partitioned table HDFS location assistance. Export ALTER TABLE SET command can also be used for changing the file location and file format for exsisting tables. For more information, see ALTER DATABASE SCOPED CONFIGURATION. Join Stack Overflow to learn, share knowledge, and build your career. SPARK-29260 Enable supported Hive metastore versions once it support altering database location. Create a default directory for managed tables only after limiting CREATE DATABASE and ALTER DATABASE statements to users having the Admin role. The issue was that during the creation of the table i set its location to a non existent path on hdfs. itests/hive-unit/src/test/java/org/apache/hadoop/hive/metastore/TestHiveMetaStore.java, ...hive-unit/src/test/java/org/apache/hadoop/hive/ql/security/TestAuthorizationPreEventListener.java, metastore/src/java/org/apache/hadoop/hive/metastore/HiveMetaStore.java, metastore/src/java/org/apache/hadoop/hive/metastore/ObjectStore.java, metastore/src/java/org/apache/hadoop/hive/metastore/events/PreAlterDatabaseEvent.java, metastore/src/java/org/apache/hadoop/hive/metastore/events/PreEventContext.java, ql/src/java/org/apache/hadoop/hive/ql/exec/DDLTask.java, ql/src/java/org/apache/hadoop/hive/ql/parse/DDLSemanticAnalyzer.java, ql/src/java/org/apache/hadoop/hive/ql/parse/HiveParser.g, ql/src/java/org/apache/hadoop/hive/ql/parse/SemanticAnalyzerFactory.java, ql/src/java/org/apache/hadoop/hive/ql/plan/AlterDatabaseDesc.java, ql/src/java/org/apache/hadoop/hive/ql/plan/HiveOperation.java, ql/src/java/org/apache/hadoop/hive/ql/security/authorization/AuthorizationPreEventListener.java, ql/src/java/org/apache/hadoop/hive/ql/security/authorization/plugin/HiveOperationType.java, ql/src/java/org/apache/hadoop/hive/ql/security/authorization/plugin/sqlstd/Operation2Privilege.java, ...t/src/test/java/org/apache/hadoop/hive/ql/security/TestAuthorizationPreEventListener.java, .../java/org/apache/hadoop/hive/ql/security/authorization/AuthorizationPreEventListener.java, @@ -3279,6 +3280,34 @@ public void testGetTableObjects() throws Exception {, @@ -160,6 +160,10 @@ private void validateDropDb(Database expectedDb, Database actualDb) {, @@ -325,6 +329,19 @@ public void testListener() throws Exception {, @@ -1065,13 +1066,24 @@ public Database get_database_core(final String name) throws NoSuchObjectExceptio, @@ -800,6 +800,12 @@ public boolean alterDatabase(String dbName, Database db), @@ -959,6 +959,26 @@ private int alterDatabase(Hive db, AlterDatabaseDesc alterDbDesc) throws HiveExc, @@ -480,6 +480,9 @@ public void analyzeInternal(ASTNode input) throws SemanticException {, @@ -725,6 +728,14 @@ private void analyzeAlterDatabaseOwner(ASTNode ast) throws SemanticException {. For every successfully created database, the Alteration can be done as per the user requirement. Making statements based on opinion; back them up with references or personal experience. We can set the database on which we need to work with USE command in hive. Here are the illustrated steps to change a custom database location, for instance "dummy.db", along with the contents of the database. You can also manually update or drop a Hive partition directly on HDFS using Hadoop commands, if you do so you need to run the MSCK command to synch up HDFS files with Hive Metastore. No metadata of the existing tables or partitions are changed. Please note that only Hive 3.x … HIVE-8472: Add ALTER DATABASE SET LOCATION (Mithun Radhakrishnan, rev…. What SET LOCATION does is, it changes the parent directory of the Hive database and all the new data is stored in the newly mentioned location. site design / logo © 2021 Stack Exchange Inc; user contributions licensed under cc by-sa. Is it possible to create a "digital seal" to tell if a document has been opened? Stigma of virginity and chastity loophole, I want to turn an equality statement into a function. In Impala 2.6 and higher, Impala automatically handles creating or removing the associated folders when you issue ALTER TABLE statements with the ADD PARTITION or DROP PARTITION clauses. The default database can not be altered in the Hive because it is restricted. mysql> use hive; Get the DB_ID value of the database we want to rename Open Changing location requires 2 steps: 1.) DDL statements create and modify database objects such as tables, indexes, and users. How can I draw the trefoil knot in 3D co-ordinates in Latex using these parametric equations? The resolution: Is there an engine evaluation technique that factors in 'time'? How does the strong force increase in attraction as particles move farther away? Database mirroring, Always On availability groups, and compatibility levels are SET options but are described in separate articles because of their length. What could a getaway driver be charged with? Below example describes about to change the user role to admin in database. I am using MySQL database for hive so let’s connect it first: [admin@host1 ~]$ ps -ef | grep mysql [admin@host1 ~]$ cd /usr/local/mysql/bin [admin@host1 ~]$./mysql -u root -p. Now we are into mysql shell. Doubts related to speed of sound in different mediums, Ancient temple booby traps designed for dragons. Reducing Latency Between US and India/South Asia or Desktop Access on CentOS 7+ GNOME. Hive ALTER TABLE command is used to update or drop a partition from a Hive Metastore and HDFS location (managed table). So, in order to use these commands with all the options described below we need at least hive-0.14.0 release. The partition_spec specifies a column name/value combination in the form partition_col_name = partition_col_value. Is there any official/semi-official standard for music symbol visual appearance? The following table contains the fields of employeetable and it shows the fields to be changed (in bold). In this post, we will discuss about Hive Database Commands (Create/Alter/Use/Drop Database) with some examples for each statement. The following queries rename the column name and column data type using the above data: 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. Only in the Admin role can you ensure that the managed directory restricts permissions to the directory for managed tables to the hive service user. Is this a draw despite the Stockfish evaluation of −5? ALTER DATABASE ALTER TABLE; ALTER VIEW ... ALTER TABLE SET command is used for setting the SERDE or SERDE properties in Hive tables. You signed in with another tab or window. Syntax: ... ALTER DATABASE in Hive. Query to Create Database DATABASE or SCHEMA is same thing in behavior. So when i was trying to alter its location,it wasn't allowing me to do so. This article explains how to rename a database in Hive manually without modifying database locations, as the command: ALTER DATABASE test_db RENAME TO test_db_new; still does not work due to HIVE-4847 is not fixed yet. ALTER SCHEMA was added in Hive 0.14 (HIVE-6601). @@ -329,6 +329,7 @@ TOK_DATABASELOCATION; @@ -1201,6 +1202,7 @@ alterDatabaseStatementSuffix, @@ -1217,6 +1219,13 @@ alterDatabaseSuffixSetOwner, @@ -302,6 +303,7 @@ private static BaseSemanticAnalyzer getInternal(QueryState queryState, ASTNode t, @@ -53,8 +54,8 @@ public AlterDatabaseDesc() {, @@ -64,6 +65,12 @@ public AlterDatabaseDesc(String databaseName, PrincipalDesc ownerPrincipal) {, @@ -91,6 +98,14 @@ public void setOwnerPrincipal(PrincipalDesc ownerPrincipal) {, @@ -163,6 +164,9 @@ public void onEvent(PreEventContext context) throws MetaException, NoSuchObjectE, @@ -257,6 +261,21 @@ private void authorizeDropDatabase(PreDropDatabaseEvent context). If you are working with a more standard Hive setup and only need to change the table locations in the current database instance, you can simplify things with the ALTER TABLE statement. Thanks for contributing an answer to Stack Overflow! rev 2021.3.12.38768, Stack Overflow works best with JavaScript enabled, Where developers & technologists share private knowledge with coworkers, Programming & related technical career opportunities, Recruit tech talent & build your employer brand, Reach developers & technologists worldwide, Hive alter location statement not working, State of the Stack: a new quarterly update on community and product, Podcast 320: Covid vaccine websites are frustrating. If nothing happens to be there, hive … By default, the location for default and custom databases is defined within the value of hive.metastore.warehouse.dir, which is /apps/hive/warehouse. No other metadata about the database can be changed, including its name and directory location: hive> ALTER DATABASE financials SET DBPROPERTIES ('edited-by' = 'Joe Dba'); There is no way to delete or “unset” a DBPROPERTY. Hive DDL stands for (Data Definition Language) which are used to define or change the structure of a Databases and Tables. Alteration on the database is made to change its existing properties or characteristics. Alter Database in Hive You can set key-value pairs in the DBPROPERTIES associated with a database using the ALTER DATABASE command.
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