vertica

In the use of Vertica often encountered in the execution of a time-consuming query when you want to forcibly end or interrupt this operation, at this time can be provided by the Vertica interrupt_statement () function to solve such problems, interrupt_ Statement requires two parameters, the first parameter is session_id, and the second parameter is statement_id, both of which can be obtained from the sessio

Label: Delete primary KEY (the primary key value of the Vertica database is not unique):SELECT analyze_constraints (' Fb_s.c_log '); Locate the key name, and then: ALTER TABLE fb_s.c_log DROP CONSTRAINT c_primary; SELECT analyze_constraints (' Fb_s.user_info '); ALTER TABLE fb_s.user_info DROP CONSTRAINT c_primary; Build Users and schemas: CREATE user fb_s_sql identified by ' password ';CREATE SCHEMA Fb_s_sql; Give permission:GRANT all on the SCHEMA f

This article address: http://blog.csdn.net/kongxx/article/details/7176961 A recent stress test on Vertica found that the following exception occurred when the number of concurrent requests reached 50 + Com.vertica.util.PSQLException:FATAL:New session rejected due to limit, already-sessions active at Com.vertica.core. V3. Connectionfactoryimpl.readstartupmessages (Unknown Source) at Com.vertica.core.v3.ConnectionFactoryImpl.openConnectionImpl (Unknown

Recently upgraded Vertica to 6.1.3, found that the error code is not complete in the 6.1.x document, or perhaps no update, the following is a complete JDBC error code list below: Com/vertica/dsi/core/impl/jdbcmessages.properties # Format is Key = (nativeerrorcode) message. In all translations of this file, # the (Nativeerrorcode) _must_ is unmodified and _must_ be included. Batch_not_empty = (10000) BATCH

Use Vertica to construct a calendar:SELECT to_number (TO_CHAR (ts: DATE, 'yyyymmdd') as day_id,Year (ts: DATE) as year_of_calendar,Month (ts: DATE) as month_of_year,Dayofweek (ts: DATE) as day_of_weekFROM (SELECT '01-01-2013 ': TIMESTAMP as tmUNIONSELECT '12-31-2500 ': TIMESTAMP as tm) As tTIMESERIES ts as '1 Day' OVER (order by tm );Create a calendar in Oracle:Select to_date ('123', 'yyyymmdd') + (level-1) as day_id,EXTRACT (year from (to_date ('2014

Delete primary key (the primary key value for the Vertica database is not unique): SELECT analyze_constraints (' Fb_s.c_log '); Locate the key name, and then: ALTER TABLE fb_s.c_log DROP CONSTRAINT c_primary SELECT analyze_constraints (' Fb_s.user_info '); ALTER TABLE fb_s.user_info DROP CONSTRAINT c_primary; Build users and schemas: CREATE user fb_s_sql identified by ' password '; CREATE SCHEMA Fb_s_sql; gives permission: GRANT all o

Requirements: Build a table on the Vertica database, the table structure originates from the original Oracle database, so it needs to be converted into Vertica database table structure. The actual conversion operation needs to evaluate all the data types used by the source library and the characteristics of the data itself. The following is a summary of the replacement rules under a scenario, for informatio

Tags: dba run too cut OCA tle source load optimizedThe DBD = Database Designer is the primary native tool in the optimization of Vertica databases. First run the AdminTools tool and follow the steps below: 1. Select "6 Configuration Menu"2. Select "2 Run Database Designer"3. "Select a database for design"Select the database you want to analyze4. "Enter directory for Database Designer output:"Enter the output directory of the DBD5. "Designer Name:"Ente

The table structure is as follows: CREATETABLEIFNOTEXISTSpublic. user (idPRIMARYKEY, namevarchar (32) NOTNULLUNIQUE ,......); modify statement altertablepublic. useralternamesetdatatypevarchar (52); due to the constraints of the "UNIQUE" condition,

Three words: strong, big, comprehensive, and strongly recommended SQL statement Query Result select (timestamp '2005-01-17 10:00' - timestamp '2005-01-01'); 16 10:10 select (timestamp '2005-01-17 10:00' -

1. Query the database for waitingSELECT * from Resource_queues where node_name= (select Node_name from Nodes order by Node_name limit 1) Order by queue_entr Y_timestamp desc;2. Check the current database execution SQL (included in the queue waiting)3

RHEL 6.2 CPU 24 memory 128G 8 Node 1. Keep more Event Logs for dc_tuple_mover_events. select SET_DATA_COLLECTOR_POLICY(‘TupleMoverEvents‘, ‘1000‘, ‘100000‘); Default: 1000kb kept in memory, then kb kept on disk. 2. Keep more Event Logs for

# Example: migrate Weibo user data. Because the structure of the source table weiboFriend is not exactly the same as that of the target table weiboUser, the statement must not only strictly arrange the field order, but also use the default (for

That ' s it. I find that there are too few laravel on the Internet. A lot of things need to be done by ourselves. To understand.One of my methods is to go to GitHub to download the Laravel website written by the foreigner, and then take it to run,

This article address: http://blog.csdn.net/kongxx/article/details/6656658 Today upgraded Vertica from 4.0.x to 5.0.4 version, found vertica4x multiple database instance port configuration The method mentioned in the article is no longer applicable, do some research findings can be achieved through the following steps: 1. First stop all the database instances; 2. Create multiple database instances, such as MYDB1 and MYDB2; 3. Edit the/opt/

Vertica7 Native Connection Load Balance, vertica7native Original article: Vertica7 Native Connection Load Balance In versions earlier than Vertica7, Vertica implements Server Load balancer through the Virtual IP address of Linux. However, in Vertica7x, Vertica provides the Server Load balancer function for connections, this function is also very convenient to use. Let's take a look at how to use this funct

MSYQL to Vertica1, MySQL in the Openshop database to select one of the data about 300W tableCREATE TABLE Ip_records_tmp_01AsSELECT * from Ip_records_tmp tWHERE t.datetime2, Vertica CREATE table ip_records_tmp_01, note that the field type and MySQL a little different.The total amount of 2,478,130 data extraction, time consuming 30s, good speed!3, add 972,948 data in MySQL, delete 462,151 data, update 273,427 dataNew:INSERT INTO ip_records_tmp_01SELECT

Tags: flow blog blank results performance Taf mapred Tin HadoopMany of my friends asked if Hadoop was the right time to introduce our own projects and when to use SQL. When to use Hadoop, what are the tradeoffs between them? Aaron Cordova with a picture to answer your question, for different data scenarios, how to choose the right data storage processing tools to describe the specific description. Aaron Cordova is a big data analytics and architecture expert in the United States. Koverse CTO and

Run Echo deadline>/sys/block/sda/queue/schedue Echo 'echo deadline>/sys/block/sda/queue/scheduler '>/etc/rc. local Run /Sbin/blockdev -- setra 2048/dev/sda1 Echo '/sbin/blockdev -- setra 2048/dev/sda1'>/etc/rc. local Vi/etc/selinux/config Change to SELINUX = disabled Run Setenforce 0 Vi/etc/grub. conf Add Transparent_hugepage = never Run If test-f/sys/kernel/mm/redhat_transparent_hugepage/enabled; then Echo never>/sys/kernel/mm/redhat_transparent_hugepage/enabled Fi Copy the package

Many friends ask whether the current full-time Hadoop is suitable for the introduction of our own projects, when to use SQL, when to use Hadoop, how to choose between them? Aaron Cordova to answer your question with a picture, for different data scenarios, how to choose the correct data storage processing tool is described in detail. Aaron Cordova is an expert on big data analytics and architecture in the United States, Koverse CTO and co-founder.The text on Twitter @merv forwarded a blog, "Stat