asked Jan 22 '18 at 15:40. roh roh. Log In. Export. Priority: Major . To unsubscribe from this group and stop receiving emails from it, send an email to impala-user+unsubscribe@cloudera.org. 1 Impala 2.0 Update Sho Shimauchi, Cloudera 2014/10/31 2. Static and Dynamic Partitioning Clauses. Although, there is much more to learn about using Impala WITH Clause. So, in this article, we will discuss the whole concept of Impala WITH Clause. This capability allows convenient access to a storage system that is remotely managed, accessible from anywhere, and integrated with various cloud-based services. For reasons I won't go into we have a need to provide information about the partitions in a table. 115k 12 12 gold badges 79 79 silver badges 165 165 bronze badges. However on Impala, even after : REFRESH elevationP; and. The partition can be one that Impala created and is already aware of, or a new partition … Badges; Users; Groups; Mismatched # of partitions between hive and impala; Sammy Yu. Does anyone know why it would not be finding the data? SHOW PARTITIONS; SHOW TABLE EXTENDED; SHOW TBLPROPERTIES; SHOW FUNCTIONS; SHOW COLUMNS; SHOW CREATE TABLE; SHOW INDEXES; Semantic Differences in Impala Statements vs HiveQL. Hey Community, We are using a couple CDH clusters for our BI platform. The following statement provides that info: show partitions database.table; However that doesn't make the returned dataset queryable. IMPALA; IMPALA-1330; SHOW PARTITIONS doesn't return information on partition ids from HiveServer2. Grokbase › Groups › Hadoop › impala-user › January 2014. Type: Bug Status: Resolved. It is common to use daily, monthly, or yearly partitions. Now my requirement is i want all the tables which will have cust in its name and table should not have quarter2. That means 1500 partitions. Description. Following is an example of the show tables statement. The down side is that if I create a new table in Hive, I have to "invalidate metadata" in Impala for it to be able to see the new table and for existing tables, I have to "refresh" the underlying Hive table before I can run a query in Impala. Export Details. YEAR=2017/MONTH=8/DAY=2), the data shows. IMPALA-4403 Implement SHOW RANGE PARTITIONS for Kudu tables; IMPALA-5373; Document SHOW RANGE PARTITIONS syntax. The following examples show how to make Impala aware of data added to a single partition, after data is loaded into a partition's data directory using some mechanism outside Impala, such as Hive or Spark. Blocked on https://issues.apache.org/jira/browse/KUDU-1153. Mixed in a little bit with new Kudu syntax for ALTER TABLE. 1 ACCEPTED SOLUTION Accepted Solutions Highlighted. Specifying all the partition columns in a SQL statement is called static partitioning, because the statement affects a single predictable partition. Both Apache Hive and Impala, used for running queries on HDFS. Impala 2.0 Update #impalajp 1. I tried to find in impala doc if there is something like show latest partition tableName; as show partitions tableName but no luck on that. Change setting and parameters of an existing partition. If you want to get the list of tables in a particular database, first of all, change the context to the required database and get the list of tables in it using show tables statement as shown below. hive cloudera hiveql cloudera-cdh impala. Support Questions Find answers, ask questions, and share your expertise cancel. OneCricketeer. Fix Version/s: Impala 2.0. Prior to Impala 1.4.0, it was not possible to use the CREATE TABLE LIKE view_name syntax. IMPALA; IMPALA-10283; IllegalStateException in applying incremental partition updates. Dropping it the same way on Impala … Static and Dynamic Partitioning Clauses . SHOW PARTITIONS databaseFoo.tableBar LIMIT 10; -- (Note: Hive 4.0.0 and later) SHOW PARTITIONS databaseFoo.tableBar PARTITION(ds='2010-03-03') LIMIT 10; -- (Note: Hive 4.0.0 and later) SHOW PARTITIONS databaseFoo.tableBar PARTITION(ds='2010-03-03') ORDER BY hr DESC LIMIT 10; -- (Note: Hive 4.0.0 and later) SHOW PARTITIONS databaseFoo.tableBar PARTITION(ds='2010-03-03') WHERE … The following examples show how to make Impala aware of data added to a single partition, after data is loaded into a partition's data directory using some mechanism outside Impala, such as Hive or Spark. MapReduce specific features of SORT BY, DISTRIBUTE BY, or CLUSTER BY are not exposed. share | improve this question | follow | edited Jan 23 '18 at 2:56. So, in this article, “Impala vs Hive” we will compare Impala vs Hive performance on the basis of different features and discuss why Impala is faster than Hive, when to use Impala vs hive. Log In. Export. At that time using Impala WITH Clause, we can define aliases to complex parts and include them in the query. ImpalaTable.column_stats Return results of SHOW COLUMN STATS as a pandas DataFrame. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. I tried using the show table stats command in impala, but I'm getting. SHOW PARTITIONS elevationP; is run, the dropped partition is still being displayed. ImpalaTable.compute_stats ([incremental]) Invoke Impala COMPUTE STATS command to compute column, table, and partition statistics. Real-time Query for Hadoop; mirror of Apache Impala - cloudera/Impala 2,509 Views 0 Kudos 1. Resolution: Fixed Affects Version/s: Impala 1.4.1. I've verifified that the impala user is on the facl lists for these areas. There are times when a query is way too complex. Objective. Details. show tables in bank like '*cust*' It is returning the expected results like, which are the tables has a word cust in its name. Computing stats for groups of partitions: In Impala 2.8 and higher, you can run COMPUTE INCREMENTAL STATS on multiple partitions, instead of the entire table or one partition at a time. show files in sample_table partition (j < 5); show files in sample_table partition (k = 3, l between 1 and 10); show files in sample_table partition (month like 'J%');]]> < note > This statement applies to tables and partitions stored on HDFS, or in the Amazon Simple Storage System (S3). I should point out that if I ignore partitioning and instead just try and build a table on top of data from one day (IE. In Impala 1.4 and later, there is a SHOW PARTITIONS statement that displays information about each partition in a table. Log In. Different syntax and names for query hints. If there are no cache directives in place for that table or partition, the result set displays NOT CACHED. In Impala 1.4.0 and higher, you can create a table with the same column definitions as a view using the CREATE TABLE LIKE technique. Example. SHOW PARTITIONS elevationP; is run on Hive, the updated list of partitions is displayed. I first run. After that, I have some Streaming Analytics to perform with Apache Flink SQL, and I also want permanent fast storage in Apache Kudu queried with Apache Impala. The hive show partition results came back as expected. hadoop hive cloudera impala. Syntax and usage notes for ALTER TABLE, COMPUTE STATS, and SHOW FILES. XML Word Printable JSON. Can someone please help me how to solve this issue. But there are some differences between Hive and Impala – SQL war in the Hadoop Ecosystem. FAQ. A ... Impala also supports cloud storage options such as S3 and ADLS. Reply. You include comparison operators other than = in the PARTITION clause, and the COMPUTE INCREMENTAL STATS statement applies to all partitions that match the comparison expression. Impala should support a SHOW PARTITIONS statement for Kudu tables. 1. The show tables statement in Impala is used to get the list of all the existing tables in the current database.. Priority: Major . Impala SHOW statement: For each table or partition, the SHOW TABLE STATS or SHOW PARTITIONS statement displays the number of bytes currently cached by the HDFS caching feature. Turn on suggestions . Type: Sub-task Status: Resolved. Component/s: None Labels: None. See SHOW Statement for details. ... For time-based data, split out the separate parts into their own columns, because Impala cannot partition based on a TIMESTAMP column. Queries do not need a FROM clause. SHOW PARTITIONS: Displays information about each partition in a table. INVALIDATE METADATA elevationP; when. Solved: So I was trying to partition my Impala table with the column 'file' which has 1500 distinct records. XML Word Printable JSON. 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