It converts SQL-like queries into MapReduce jobs for easy execution and processing of extremely large volumes of data. net courses are available immediately for IT professionals and can be taken without disruption of your workplace schedule or processes. When External Partitioned Tables are created, "discover. I think the solution would be this one: update either hive. Read rendered documentation, see the history of any file, and collaborate with contributors on projects across GitHub. Already different formats of data like structured, semi-structured and unstructured were piling up. In the strict mode (i. Kudu allows insert,delete,update on tables in collaboration with impala. A Quick and Efficient Way to Update Hive Tables Using Partitions. Last Update made on March 20, 2018. This article provides the SQL to list table or partition locations from Hive Metastore. Hive Create Table - Create table involves naming the table and defining its columns and each column's data type. GitHub makes it easy to scale back on context switching. ALTER TABLE ADD PARTITION. Keep track of hashrates, online statuses, GPU errors, team activity, pool configurations, power consumption, remote access from anywhere across the globe, troubleshoot and reboot GPUs remotely or perform bulk updates across your entire farm. By default, Hive uses the derby database as its meta store. confwhitelist to include the properties that users can modify. If you create a table in hive and want to query the results in impala, you must run this command after each change to table structures in hive in order to update the metadata about the tables in impala. All your code in one place. Attunity Compose for Hive automates the data pipeline to create analytics-ready data by leveraging the latest innovations in Hadoop such as the new ACID Merge SQL capabilities, available today in Apache Hive (part of the Hortonworks 2. To register the partitions, run the following to generate the partitions: MSCK REPAIR TABLE "". Archive Partition Compression: Wrapping Up Chapter 12 Developing Changing Log4J Properties Connecting a Java Debugger to Hive Building Hive from Source Setting Up Hive and Eclipse Hive in a Maven Project Unit Testing in Hive with hive_test The New Plugin Developer Kit Chapter 13 Functions. This feature is not available right now. Hive: SQL for Hadoop Dean Wampler Wednesday, May 14, 14 I'll argue that Hive is indispensable to people creating "data warehouses" with Hadoop, because it gives them a "similar" SQL interface to their data, making it easier to migrate skills and even apps from existing relational tools to Hadoop. Hive is just an interface above map reduce that help you write SQL like queries that inturn is converted to MR jobs. Previously it was a subproject of Apache® Hadoop® , but has now graduated to become a top-level project of its own. Does EaseUS Partition Master license apply to multiple computers? The license of Partition Master Professional and Server editions can be used on 1 computer only, while that for for the Technician and Unlimited editions can be used on multiple machines. 3 version onwards Hive started supporting CRUD (create, read, update and delete). Subject: Re: update a hive table Hey Richard First, don't treat hive as a database. HDInsignt is a Hadoop cluster on a Windows server. In this case, SELECT * FROM does not return results. The MidnightDBA Star-Times. After creating a partitioned table, Hive does not update metadata about corresponding directories on the file system or object store that you add or drop. Github link. But even the Programming Hive book lacks good information on how to effectively use Hive with JSON records, so I'm cataloging my findings here. 0 onwards, they are displayed separately. Notice: Undefined index: HTTP_REFERER in /home/nuag0mux3hiw/public_html/salutaryfacility. Hive Partition is further subdivided into clusters or. it’s possible to update data in Hive using ORC format. Without partitioning, any query on the table in Hive will read the entire data in the table. When data in your Hive tables need to be changed, whether due to a correction of data, a restatement of existing transaction data, or a deletion due to the end of the data lifecycle, this new feature lets you make the updates without an entire partition rewrite. You can not partition a Hadoop table using a TIMESTAMP type but you can partition a Hadoop table using a DATE type. Advanced Unix (Linux or Mac) users can use dd to write RAW image to disk. Using partitions it's easy to query a portion of data. For example, when the Hive Metadata processor encounters a record that requires a new Hive table, it passes a metadata record to the Hive Metastore destination and the destination creates the table. # Partition Information # col_name data_type year string month string day string hour string I want to run the query on a whole month. This feature is not available right now. mapfiles=true or hive. Adding Columns to an Existing Table in Hive. In this post I am going to provide a very brief overview of couple of challenges we faced to…. Hive stores a list of partitions for each table in its metastore. confwhitelist. With Dynamic partitions we just need a single Insert Overwrite statement to create and load data into all the partitions. Hi George, We have tried this in a regular mapping where the partition column was the last column and specified the hive settings for dynamic partitions and it worked pretty fine, but in our case we have created table with partition column and then imported the table into Informatica. This is supported only for tables created using the Hive format. However, now we can use the IDE we have been using for years for connecting with HDInsight and executing various types of queries such as Hive, Pig and USQL. Hive has this wonderful feature of partitioning — a way of dividing a table into related parts based on the values of certain columns. where day > 01 and day < 31 But the table is VERY big. From Hive 0. However, beginning with Spark 2. Please help me with the options if any to create external partitions and during a reload we are supposed to drop those partitions as well. Row_number() over (partition by order by) – Learn more on the SQLServerCentral forums can anyone please explain to me in plain english what this update statement is doing (mainly the. You can configure Hive to create partitions dynamically and then run a query that creates the related directories on the file system, such as HDFS or S3. Apache Hive. In this blog I will explain how to configure the hive to perform the ACID operation. Users should make sure the actual data conforms with the metadata definition manually. Check the below article on how to dynamically partitions the table. But when I try to see that data loaded in HIVE table through HUE editor the query runs successfully retrieving 0 results. For information about partitioning support offered in MySQL Enterprise Edition binaries, see Chapter 29, MySQL Enterprise Edition. 13, but they only partially fulfill the ACID properties like atomicity, consistency, durability, at the partition level. the command expects a proper URI that can be found either on the local file-system or remotely. PARTITION Maintenance for the Time-Series Case Let's focus on the maintenance task involved in Case #1, as described above. Hive Version used - hive-0. After going through this Apache. Running queries in Hive usually took some time, since Hive scanned all the available data sets, if not specified otherwise. On defining Hive Partition, in other words, it is a sub-directory in the table directory. Subject: Re: update a hive table Hey Richard First, don't treat hive as a database. First create a table in such a way so that you don't have partition column in the table. As of Hive 0. Our thanks to Rakesh Rao of Quaero, for allowing us to re-publish the post below about Quaero's experiences using partitioning in Apache Hive. This is Part 1 of a 2-part series on how to update Hive tables the easy way. They are basically subdirectories in HDFS. on “Tip: OVER and PARTITION BY. Hive metadata helps the driver to keep a track of the data and it is highly crucial. Stay tuned for the next part, coming soon! Historically, keeping data up-to-date in Apache Hive required custom. You can tell a Sqoop job to import data for Hive into a particular partition by specifying the --hive-partition-key and --hive-partition-value arguments. Hive Create Table - Create table involves naming the table and defining its columns and each column's data type. For MDT Task Sequences, the Format and Partition Disk tasks will have custom names such as Format and Partition Disk (UEFI), Format and Partition Disk 6. Below is the sample job config of running Gobblin hive distcp. The benefit of this would be that instead of a paltry 20MB /var partition on the primary system drive to hold everybody’s mail, the admin would now have a ginormous 400MB partition. In order to allow update and delete we need to add additional settings in hive-site. 0 and earlier, no distinction is made between partition columns and non-partition columns while displaying columns for DESCRIBE TABLE. It allows dynamic and both static partitioning of tables. In Hive, since data is stored as files on HDFS, whenever you partition the table it creates sub directories using the partition key. In hive Update and Delete is not done easily, it has some limitations. SQL on Hadoop technologies typically utilize one of two storage engines: … 4 Strategies for Updating Hive Tables Read More ». Partitioned Tables: Hive supports table partitioning as a means of separating data for faster writes and queries. where day > 01 and day < 31 But the table is VERY big. In strict mode we can use dynamic partition only with a Static Partition. The partition data must be part of the "directory name" and not the "filename" because Hive loads data from a directory. Thus, a complex update query in a RDBMS may need many lines of code in Hive. But be careful finding out output disk "of", use fdisk -l to list your partitions. Note that values for the partition columns are not included above. This talk will cover the intended use cases, architecture, and performance of insert, update, and delete in Hive. the difference is , when you drop a table, if it is managed table hive deletes both data and meta data, if it is external table Hive only deletes metadata. It allows dynamic and both static partitioning of tables. This will determine how the data will be stored in the table. How do I get INSERT, UPDATE, DELETE, the Table Data Editor and Import to work with Hive?. confwhitelist. However, depending on on the partition column type, you might not be able to drop those partitions due to restrictions in the Hive code. Hive Partitions is a way to organizes tables into partitions by dividing tables into different parts based on partition keys. In the Format and Partition Disk task, under Volume, for each volume BEFORE the OS volume: Highlight the volume, right click on it, and then choose Properties. For example, Spark, as of version 2. I think the solution would be this one: update either hive. Loading Unsubscribe from itversity? Cancel Unsubscribe. xml and create table with ACID output format support. How to Improve Hive Query Performance With Hadoop The Hive table is divided into a number of partitions and is called Hive Partition. Hive fails when inserting data to dynamically partitioned table 28 Oct 2014. Now we learn few things about these two 1. 0 In Previous Blog we have seen creating and loading data into partition table. If you go the staging table approach, you can use a UDF to parse the correct partition value from the Policy_Timestamp field when inserting into the partitioned table. Make time for life’s best moments with Hive’s family of smart products, working together to turn your home into a smart home. But in our scenario static partitions won't serve the purpose or rather it is too tedious. Add partitions to the table, optionally with a custom location for each partition added. Be in control Everything is at your fingertips. Bucketing in Hive. # Partition Information # col_name data_type year string month string day string hour string I want to run the query on a whole month. Which allows to have ACID properties for a particular hive table and allows to delete and update. Update And Delete For Version 0. This simplifies data loads and improves performance. Updating or deleting data in partition required removing the old partition and adding it back with the new data and it wasn’t possible to do atomically. 7 (see JIRA HIVE-1307 for details). Table Creation by default It is Managed table. Partition keys are basic elements for determining how the data is stored in the table. In managed table both the data an schema in under control of hive but in external table only the schema is under control of Hive. I hope you must not have missed the earlier blogs of our Hadoop Interview Question series. Hive then separates the data into the directories. Hi George, We have tried this in a regular mapping where the partition column was the last column and specified the hive settings for dynamic partitions and it worked pretty fine, but in our case we have created table with partition column and then imported the table into Informatica. The concept of partitioning in Hive is very similar to what we have in RDBMS. hive comes up fine and show tables etc but the hive location is still pointing to old cluster. Check the below article on how to dynamically partitions the table. However, many use cases require periodically updating rows such as slowly changing dimension tables. 14 and later provides different row level transactions such as INSERT, DELETE and UPDATE. Apache Hive Type System. append or hive. I read few blogs - we need to write a script for this to update meta data. Instead, Hive supports a technique for dynamically creating partitions with the INSERT OVERWRITE statement. If you want to store the data into hive partitioned table, first you need to create the hive table with partitions. partition=false; Step 3: Run the command. Creates one or more partition columns for the table. This is supported only for tables created using the Hive format. Step (C) illustrates how you can list or show the indexes created against a particular table. hive> alter table emptable drop. GitHub makes it easy to scale back on context switching. mapfiles=true or hive. 14 were these functions fully added to support complete ACID properties. How to Build Optimal Hive Tables Using ORC, Partitions, and Metastore Statistics May 16, 2018 Landon Robinson Developer Blog , Product Pulse Creating Hive tables is a common experience to all of us that use Hadoop. Active Partition Recovery Key is the most famous data recovery software designed by professionals who recover your account records, PDF files, images etc. Let us use different names for the country and state fields in staged - employees, calling them cnty. I hope you must not have missed the earlier blogs of our Hadoop Interview Question series. Now we will try to update one record using INSERT statement as hive doesnt support UPDATE command. Currently this works only with tables in orc. autoBroadcastJoinThreshold). 13 but were only limited to the partition level. HiveQL, which is an SQL-like language provided by Hive, provides a mechanism to project structure onto the data and query the data. The big difference here is that we are PARTITION’ed on datelocal, which is a date represented as a string. By default, Hive uses the derby database as its meta store. When developing Hive-based applications, developers always have to deal with different HiveQL queries to perform basic CRUD (Create, Read, Update and Delete) and other operations on Hive table data. We know that Hive will create a partition with value “__HIVE_DEFAULT_PARTITION__” when running in dynamic partition mode and the value for the partition key is “null” value. Partitioning allows Hive to run queries on a specific set of data in the table based on the value of partition column used in the query. But be careful finding out output disk "of", use fdisk -l to list your partitions. If you want to store the data into hive partitioned table, first you need to create the hive table with partitions. But even the Programming Hive book lacks good information on how to effectively use Hive with JSON records, so I'm cataloging my findings here. Now a days there is growing need of updating/deleting of data in hive. A) Use the statment ALTER TABLE … ARCHIVE PARTITION to archive partition (This will move that partition file into a Hadoop archive (HAR) file). format (stored as orc) Alternatively, use Hbase with Phoenix as the SQL layer on top. Kudu fill in the gap of hadoop not being able to insert,update,delete records on hive tables. Now we learn few things about these two 1. Until Hive 0. In a relation database we will perform updating the exiting records using unique index/primary key, but in Hive we have to do it in different way. Hive uses the statistics such as number of rows in tables or table partition to generate an optimal query plan. Using this we can understand partition in hive. 1, will perform broadcast joins only if the table size is available in the table statistics stored in the Hive Metastore (see spark. Hive stores the schema of the Hive tables in a Hive Metastore. confwhitelist. This is Part 1 of a 2-part series on how to update Hive tables the easy way. Notice: Undefined index: HTTP_REFERER in /home/nuag0mux3hiw/public_html/salutaryfacility. All HDFS users can connect to hive and if the user is authorized to access to table as per the permissions set in Ranger user can access tables. How do I get INSERT, UPDATE, DELETE, the Table Data Editor and Import to work with Hive?. HI Tom, I have a table with multiple partitions and each partition has 5-10 millions. In this post, we will talk about how we can use the partitioning features available in Hive to improve performance of Hive queries. USER_SUBPARTITION_TEMPLATES. Hive does not provide record-level update, insert, or delete. To get a quick peek at Hudi’s capabilities, we have put together a demo video that showcases this on a docker based setup with all dependent systems running locally. However, when partitions are added directly through metadata-only partitions (either CLI or direct calls to Thrift Metastore) no stats are populated even if hive. However, users can go with CASE statements and built in functions of Hive to satisfy the above DML operations. Users should make sure the actual data conforms with the metadata definition manually. How do I get INSERT, UPDATE, DELETE, the Table Data Editor and Import to work with Hive?. 13 but were only limited to the partition level. Add partitions to the table, optionally with a custom location for each partition added. the difference is , when you drop a table, if it is managed table hive deletes both data and meta data, if it is external table Hive only deletes metadata. Hive partitioning partition Spark Sqoop table alter metastore emr small-files location merge orc parquet hdp-2. In order for this to work, the Hive environment should allow dynamic partitions which by default is set to false. Hive then separates the data into the directories. Actions can be set within the Hive app, and after a new update, can involve unlimited devices within your set-up. 14, users can request an efficient merge of small ORC files together by issuing a CONCATENATE command on their table or partition. You can partition your data by any key. table scans are the norm. Which allows to have ACID properties for a particular hive table and allows to delete and update. default_partition_name - Default partition name from configuration. Let's take the same previous Hive partition table partitioned by a column named. Configuration of Hive is done by placing your hive-site. In order to allow update and delete we need to add additional settings in hive-site. table scans are the norm. In the strict mode (i. PARTITION BY RANGE is an excellent vehicle for such a table. Hive CLI directly interacts with a Hive metastore server. In this post I am going to provide a very brief overview of couple of challenges we faced to…. It was possible to limit the volume of scanned data by specifying the partitions and buckets that Hive had to address. This is supported only for tables created using the Hive format. Note:- To revert at any point of time use UNARCHIVE key word. This will determine how the data will be stored in the table. ALTER TABLE ADD PARTITION. Although assigning a drive letter can help us to access the lost partition in File Explorer, this method cannot solve the problem “partition disappears in Windows 10 Anniversary Update” perfectly. sh, you might need to restart Hive for the updated settings to be reflected on Hive services such as hive-server2 and the metastore. Treasure Data is a CDP that allows users to collect, store, and analyze their data on the cloud. Oozie doesn't make assumptions about where a given workflow is being run. Bucketing in Hive. Metastore is used to hold all the information about the tables and partitions that are in the warehouse. “2014-01-01”. Big Data Testing. –Multi-column partitioning optimally suited for partitioned HIVE tables •Partition pruning and limited partition maintenance –Support of add partition, drop partition, exchange partition USA, … Direct USA, Partners JAPAN, Partners DEFAULT GERMANY, Direct HIVE Partition HIVE Partition HIVE Partition HIVE Partition HIVE Partition. We can use partitioning feature of Hive to divide a table into different partitions. Anyway, that was batch processing. Read rendered documentation, see the history of any file, and collaborate with contributors on projects across GitHub. In Hive, since data is stored as files on HDFS, whenever you partition the table it creates sub directories using the partition key. INTO TABLE status_updates PARTITION (ds='2009-03-20') Each status update record contains the user identifier (userid), the actual status string (status), and the date (ds) when the status update occurred. In this post, we will check Apache Hive table statistics – Hive ANALYZE TABLE command and some examples. Incremental delta loads can be achieved using Spark DF and Spark SQL as described below. While applying above query it shows a semantic Exception. When partitions are created using queries ("insert overwrite" and "insert into") then the StatsTask updates all stats. The queries also vary from one application to another. Merging files in dynamic partition inserts are supported in Hive 0. This talk will describe the intended use cases, architecture of the implementation, new features such as SQL Merge statement and recent improvements. class HiveStatsCollectionOperator (BaseOperator): """ Gathers partition statistics using a dynamically generated Presto query, inserts the stats into a MySql table with this format. Usually Partitioning in Hive offers a way of segregating hive table data into multiple files/directories. The evaulator should update its internal state with the result of performing the agrregation (we are doing sum – see below). reliable is set to true. The following diagram illustrates partitioning a Hive table by the column Year. By partitioning your data, you can restrict the amount of data scanned by each query, thus improving performance and reducing cost. For example, Spark, as of version 2. Short summary¶. SAS update/create hadoop partition; when I get a new text file (monthly basis) is update a partition using SAS. Athena leverages Hive for partitioning data. DualTable: A Hybrid Storage Model for Update Optimization in Hive show that Hive on DualTable is up to 10 times faster than Hive when executing update and delete operations. While applying above query it shows a semantic Exception. Hive is not suitable for OLTP systems because it does not provide insert and update function at the row level. Note that values for the partition columns are not included above. The big difference here is that we are PARTITION'ed on datelocal, which is a date represented as a string. Working Subscribe Subscribed Unsubscribe 46. In hive Update and Delete is not done easily, it has some limitations. txt on HIVE drive. When using the HCatalog Connector, you can get metadata about the tables in the Hive database through several Vertica system tables. If my source tables used in have a partition added to them, will the MATERIALIZED VIEW update for the new partitions efficiently?. Hive SerDe tables: INSERT OVERWRITE doesn't delete partitions ahead, and only overwrite those partitions that have data written into it at runtime. mapfiles=true or hive. The partition value must be a string. hive comes up fine and show tables etc but the hive location is still pointing to old cluster. terminatePartial() – this method is called when Hive wants a result for the partial aggregation. Thankfully, we can use the Windows 8 Recovery Environment Command Prompt to assist us in resolving these types of problems. This should give you some pros and cons to decide whether or not you should update to Hive 3. Each partition of a table is associated with a particular value(s) of partition column(s). Set TBLPROPERTIES to enable ACID transactions on Hive Tables. Hive uses the statistics such as number of rows in tables or table partition to generate an optimal query plan. I am writing this blog for, "How to Insert, Update and Delete records into a Hive table?" Apache hive 0. When External Partitioned Tables are created, "discover. Also, I would like to ask if anyone can provide help with (thanks a lot in advance), I'm trying to have this Hive table backed up by a Parquet file but be able to update the data but writing it in a new folder (like a new version) and once this is done, point the table to the new folder. Apache HBase is an open-source, distributed, versioned, non-relational database modeled after Google's Bigtable: A Distributed Storage System for Structured Data by Chang et al. Hive supports three types of conditional functions. Set TBLPROPERTIES to enable ACID transactions on Hive Tables. Selectively mask or purge data in Hive. “2014-01-01”. I am writing this blog for, "How to Insert, Update and Delete records into a Hive table?" Apache hive 0. autoBroadcastJoinThreshold). Our thanks to Rakesh Rao of Quaero, for allowing us to re-publish the post below about Quaero's experiences using partitioning in Apache Hive. In hive Update and Delete is not done easily, it has some limitations. Let us use different names for the country and state fields in staged - employees, calling them cnty. Hive • Programming framework build on top of Hadoop • Created to make it possible for analysis with strong SQL skills (and little to no Java programming) to run queries on large volumes of data. xml on different clusters (e. We can implement the same on HIVE table using below steps. Each table in the hive can have one or more partition keys to identify a particular partition. With the Hive version 0. By partitioning your data, you can restrict the amount of data scanned by each query, thus improving performance and reducing cost. Hive user: We don’t have any specific command to create a hive user. Earlier I had published a post introducing what we have been doing with Replication V2 in Apache Hive. Running the MSCK statement ensures that the tables are properly populated. farm/install. concurrency, hive. SQL University. PARTITION Maintenance for the Time-Series Case Let's focus on the maintenance task involved in Case #1, as described above. col from tab1 a' Set hive config variables hive ‐e 'select a. Go through the installation process normally until you reach the “Which type of installation do you want?” screen and click the Custom option. For external table we place data directly from source externally so hive doesn't know what partitioned data we dumped and it won't update metadata in meta store. (using SQOOP incremental load) explanation In MYSQL TABLE mysql>describe pt_adt_info_stg;(this is stage table of scdtype-2 implementation in mysql). Actions can be set within the Hive app, and after a new update, can involve unlimited devices within your set-up. Gobblin job constructs and data flow are the same as Gobblin distcp. However, writing the query without understanding the domain can bring great partitions in Hive. Does EaseUS Partition Master license apply to multiple computers? The license of Partition Master Professional and Server editions can be used on 1 computer only, while that for for the Technician and Unlimited editions can be used on multiple machines. To add partition, alter the. Stats overwrite themselves if you rerun the same date/partition. The concept of partitioning in Hive is very similar to what we have in RDBMS. Because Hive has full control of managed tables, Hive can optimize these tables extensively. The problem with hive is that when we apply where clause then even a simple query in Hive reads the entire dataset. partition=false; Step 3: Run the command. Attunity Compose for Hive automates the data pipeline to create analytics-ready data by leveraging the latest innovations in Hadoop such as the new ACID Merge SQL capabilities, available today in Apache Hive (part of the Hortonworks 2. Create Table is a statement used to create a table in Hive. Running the MSCK statement ensures that the tables are properly populated. 1, you can enable impersonation in Drill and configure authorization in Hive version 1. Each partition of a table is associated with a particular value(s) of partition column(s). In general, in any kind of table either Managed table or External table, while reading the data from the table it reads all the data containing into the table. I have install Hadoop, Hive, Hive JD BC. This is supported only for tables created using the Hive format. SAS update/create hadoop partition; when I get a new text file (monthly basis) is update a partition using SAS. Let’s see what happens with existing data if you add new columns and then load new. This api requires you to manually manage object inspectors for the function arguments, and verify the number and types of the arguments you receive. Running queries in Hive usually took some time, since Hive scanned all the available data sets, if not specified otherwise. Partition means dividing a table into coarse grained parts based on the value of a partition column such as a date. or partition. hadoop,hive,partition. Does EaseUS Partition Master license apply to multiple computers? The license of Partition Master Professional and Server editions can be used on 1 computer only, while that for for the Technician and Unlimited editions can be used on multiple machines. Partition is helpful when the table has one or more Partition keys. Anyway, that was batch processing. format (stored as orc) Alternatively, use Hbase with Phoenix as the SQL layer on top. 14 of Hive (hands on explanation). Bootrec console command is confused by multiplicity of System Reserved Partitions, and unable to update BOOT_CONFIGURATION_DATA Registry Hive of System Reserved Partition located on the removable disk, because under normal conditions this hive is supposed to be located on the fixed disk. How To Rebuild System Reserved Partition From Scratch. Apache Hive. The one thing to note here is that see that we moved the “datelocal” column to being last in the SELECT. 0 onwards, they are displayed separately. This matches Apache Hive semantics. The main take away is, if you choose to install under a different directory you'll be fine, but sometimes you may need to update files under different paths. Attunity Compose for Hive automates the data pipeline to create analytics-ready data by leveraging the latest innovations in Hadoop such as the new ACID Merge SQL capabilities, available today in Apache Hive (part of the Hortonworks 2. Configuration of Hive is done by placing your hive-site. If the data is stored in some random order under different folders then accessing data can be slower. But, while it is treated as a Hive table, it is still a file within Hadoop. ALTER TABLE ADD PARTITION. Only through Hive can you access and change the data in managed tables. After going through this Apache. From Hive 0.