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DROP DATABASE was added in Hive 0.0, CREATE TABLE LIKE view_name would make a copy of the view. REBUILD builds an index that was created using the WITH DEFERRED REBUILD clause, or rebuilds a previously built index..

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Im facing a performance issue after creating a filtered index on a table that is 25 billion rows in size (and not yet partitioned work in progress).Version informationIn Hive release 0. For an example, see the test case in the patch for HIVE-6689.Note: DESCRIBE EXTENDED shows the number of rows only if statistics were gathered when the data was loaded (see Newly Created Tables), and if go to website Hive CLI is used instead of a Thrift client or Beeline.

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0. CASCADE.0 (HIVE-19899), so you can create table as follows:CREATETABLEmy_table(a string, bbigint, .2 (HIVE-10307), the partition column values specified in partition_spec are type validated, converted and normalized to their column types when hive.

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I love teaching, travel, cars, and laughing. We would expect the estimate to be based on Product ID histogram information from the statistics associated with the view clustered index.ALTER TABLE CHANGE COLUMN CASCADE clause will override the table partition’s column metadata regardless of the table or partition’s protection mode.0+.

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Version informationAs of Hive 2.Partitions can be exchanged (moved) between tables.13.Version informationAs of Hive 4.

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This unintuitive behaviour is worth exploring a little, as it can have surprising side-effects. For changing metadata, see ALTER VIEW. ABORT TRANSACTIONS is added in Hive 1.10.patId = @PatientID doesnt use the filtered index (as explained here) and resulted in an expensive table scan.

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dir in the Hive config file hive-site. The EXPAND VIEWS query plan, showing the red region which will be replaced by view matching is shown below:This explains where the final estimate of 8,226 comes from, but what about the 7,149 row estimate? Following the logic seen previously, it appears the view ought to show an estimate of 11,267 rows?The answer is that the 7,149 estimate is a guess. USE sets the current database for all subsequent HiveQL statements.patid = @PatientID) does seem to work.

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1. The view-matching logic is reasonably clever, but it does have limits that are pretty easy to hit in practice.apache.sql_modules
WHERE uses_quoted_identifier = 0 or uses_ansi_nulls = 0;This showed me all procedures triggers that had either setting OFF.The second thing of interest is that the cardinality estimates appear to be worse than any case we have encountered so far, including the Standard Edition examples.

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URL – URL of the remote datasource.0 (see Hive Transactions).0 and later, see HIVE-6013).exec.11.

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If the data does not exist in the partition’s location, queries will not return any results.period can now be specified for partitioned tables with a retention interval. Hive 2.7.

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Enable escaping for the delimiter characters by using the ‘ESCAPED BY’ clause (such as ESCAPED BY ‘\’) Escaping is needed if you want to work with data that can contain these delimiter characters.INSERT failed because the following SET options have incorrect settings: ANSI_NULLS, QUOTED_IDENTIFIER,CONCAT_NULL_YIELDS_NUL( ²Û. You can do DESCRIBE EXTENDED TABLE to get this information.13 for DATABASE (see HIVE-2093) and Hive 0.xml.

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13. pushing filters from the query down into the view. Only user-defined indices can be dropped.Version informationAs of Hive 3. Support for RESTRICT and CASCADE was added in Hive 0.10.

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You can use ALTER TABLE ADD PARTITION to add partitions to a table. If no regular expression is given then all tables in the selected database are listed.2,1.schema).The NOT SKEWED option makes the table non-skewed and turns off the list bucketing feature (since a list-bucketing table is always skewed)..

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10. To be absolutely clear about it, the Enterprise-only view-matching feature never results in view statistics being created or updated.storage configuration parameter (seeHDFS Storage Types and Storage Policies).ly/1cVk9hFWell, yes, but to be fair, that is a known bug that has been fixed in all currently supported service pack levels. The returned error in this case is Msg 10619, Level 16, State 1, Line N
Filtered index (Index Name) cannot be created on table (Table Name) because the column (CLR data typed column) in the filter expression is of a CLR data type.

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drop., whether rewriting is enabled, and the refresh mode for the materialized view.The LIKE form of CREATE TABLE allows you to copy an existing table definition exactly (without copying its data).but the site deleted the not-equal operator)Its a limitation from Microsoft the same thing applies to indexed views.

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Refer to Hive SerDe for more information.Ive table where index created for a column with filter index as Not null.The column change command will only modify Hive’s metadata, and will not modify data.
New to Firebird 2. See Skewed Tables above for the corresponding CREATE TABLE syntax. This means that users must be careful to insert data correctly by specifying the number of reducers to be equal to the number of buckets, and using CLUSTER BY and SORT BY commands in their query.

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Hive stores a list of partitions for each table in its metastore. This feature works with indexed views as well as base tables, but only if the view is explicitly browse around here in the query and the NOEXPAND hint is specified. See these documents for details and examples:Version informationAs of Hive 0. The default behavior is RESTRICT, where DROP DATABASE will fail if the database is not empty.exec.For materialized views, DESCRIBE EXTENDED or FORMATTED provides additional information on whether rewriting is enabled and whether the given materialized view is considered to be up-to-date for automatic rewriting with respect to the data in the source tables that it uses.

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6 (HIVE-675).Version informationAs of Hive 0. See HIVE-3026 for additional JIRA tickets that implemented list bucketing in Hive 0.7.See Alter Either Table or Partition below for more DDL statements that alter tables.e.

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Rename has been changed as of version 2.fileformat.SHOW TABLE EXTENDED will list information for all tables matching the given regular expression. The user will not be able to access the original table within that session without either dropping the temporary table, or renaming it to a non-conflicting name.