MySQL : Open-Source, Relational Database Management System

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Find the neighbouring polygons of a given polygon in a MySQL spatial table in ver < 5.6.1

Finding neighbouring shapes in MySQL spatial table made up of ID and 2D geometry (polygon) fields. I have a table with an ID column and a geometry column (holding a polygon) representing various ...
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169 views

Cumulative Function in MySQL

i have a problem creating cumulative function in mysql database. let say i have a stored procedure which getting data and counting quantity/sum_quantity example A table consist of consumer goods ...
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809 views

Analyzing MySQL crash due to corrupt InnoDB page. Failed page checksum

Lately we have been pestered by infrequent sporadic database crashes on one of our MySQL instances. Each time it is due to a failed page checksum. It happens on a specific database but spans multiple ...
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119 views

Migrate from Interbase to MySQL

I need to migrate a big database from Interbase to MySQL, I'd like to have suggestions about free and non-free tools to perform this task. I've found this one: ...
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Help with Mysql with 100K+ Table

Hi im trying to develop a database design in which its gonna have 100K+ tables residing in it. My major concern here is will Mysql be able to hold that much amount of tables with no performance ...
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141 views

How to use variables in file paths in MySQL statements?

I have now a problem that I have to set paths through variables in queries like load data infile '/my/file/path/to/file.txt' into table database1.table2 fields terminated by '' lines terminated ...
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907 views

Fastest way to perform simple operations on 1 million rows

I have a simple table with more than 1 million rows in an InnoDB MySQL table. Here are the steps that I need to perform on each row: SELECT * FROM tbl where work_done=0 make some data processings ...
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MySQL: What criteria should I base my table column order/arrangement/grouping on?

Does the order, arrangement or grouping of columns with large (such as long text descriptions) and small (such as bit and tinyint) field types have any noticeable impact on MySQL (InnoDB engine) ...
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143 views

problem installing mytop , need a up to date tools for monitoring mysql

so i'm trying to installl mytop to monitor the database i'm following this instruction : http://www.sohailriaz.com/how-to-install-mytop-a-top-clone-for-mysql/ when i try to install it with yum i get ...
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182 views

How to upgrade MySQL 5.0 to 5.5 with master-master replication?

I have to update 2 hosts with SUSE Linux Enterprise 11 from SP2 to SP3 which implies an update from MySQL 5.0.94 to 5.5.31. The release notes state: SLE 11 SP3 introduces the upgrade of the MySQL ...
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Configuring MySQL for Power Failure

I have absolutely no experience with databases and MySql. Now the problem is I have an embedded device running a MySQL database with a web based application. The problem is when I shutdown my embedded ...
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142 views

Mysql replication trouble with event_scheduler

I'm running replication Master-Slave in MySQL 5.5. One day, my replication is broken. The show slave status given me 1032 error: Last_SQL_Error: Could not execute Update_rows event on table ...
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What is the most efficient way to create new MySQL database

I need to setup a development environment for several developers. Each of them needs to test the software with a "fresh" MySQL database. There is a SQL file with many CREATE, ALTER and INSERT queries. ...
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Does MySQL close cursor if stored procedure encounters an exception?

I've seen two different approaches of cursor handling is MySQL stored procedures. Now I'm curious about their stability, due to potential MYSQLEXCEPTION risks in stored routines. Assuming, that ...
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102 views

MS SQL Server: Can Unicode columns include non-unicode values?

I need to convert UNICODE column values from UTF16-LE to UTF-8 to then import into MySQL. Is it safe to assume columns of NVARCHAR, NTEXT, NCHAR, BIT, INT, DECIMAL, FLOAT, and DATETIME all MUST be ...
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MySql Very Slow Writes & Out of memory error

I am having a rds db instance in AWS which is used by Drupal 7 instatllation. I am getting the below error messages in the log: > 130912 11:57:39 [ERROR] /rdsdbbin/mysql/bin/mysqld: Out of memory ...
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456 views

How do I convert unicode data from UTF-16LE to UTF-8 when migrating from SQL Server to MySQL?

Objective: Ensure existing Unicode (UTF-16LE) data is displayed the when moved to MySQL (UTF-8). Background: I'm migrating 1TB from SQL Server to MySQL. The current Collation in SS is ...
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why is this query taking so long?

+----+-------------+-----------+----------+---------+------+----------+--------------------------------------------------------+ | Id | User | Host | db | Command | Time | State | ...
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How to index for a group by with columns from different tables?

Is it possible to create an index from columns of 2 different tables? If not, how do we optimize a query that does a group by on columns of 2 different tables? For example: the following ...
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101 views

MySQL Replication fails - commands received in wrong order?

The other day, I had this issue with one of our MySQL 5.1.60 master and 5.1.61 slave setups: Last_Error: Error 'Can't create table 'foobar.#sql-4b87_2' (errno: 150)' on query. Default database: ...
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What is the smallest encoding?

I am now using latin1 (CHAR 10 column type) and I was wondering if there is more efficient character-set to store password hash consisting of a-z0-9 characters.
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Incorrect information in .frm file after a power outage?

CentOS release 6.3 (Final) x86_64 mysql Ver 14.14 Distrib 5.5.31, for Linux (x86_64) using readline 5.1 SHOW SLAVE STATUS\G: Slave_IO_Running: Yes Slave_SQL_Running: No ...
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Mysql performance issue when selecting text column

I have a performance problem when selecting rows containing text fields: SELECT id FROM message WHERE NOT(message.sender_id = 368352 AND message.is_deleted_sender = 1) AND ...
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285 views

What is the best way to manage user access to MySQL via PHP?

I am working on a web application that requires auditing db queries in MySQL. In every application that I have developed or worked on it is standard practice to store the DB credentials in a protected ...
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mysql.sock missing

I started my MYSQL database this morning but failed. And I tried all means I can think of: chown -R mysql.mysql /var/lib/mysql chmod g+w /var/run/mysqld chgrp mysql /var/run/mysqld chmod -R 755 ...
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MySQL probelm in port: 3306

All websites on my VPS getting very slow, after dedcting the problem found that there are a line take 99.9% of the CPU: /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/mysql \ ...
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Mysql encrypted database contents by proxy?

Forive the amateur nature of this question. I work with Wordpress, often transforming the vanilla flavour into custom made versions for clients. Increasingly clients require more and more marketing ...
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How do I configure MySQL to store specific entire InnoDB tables on a different drive in Windows ( Server )?

After skimming the MySQL ( 5.5 ) docs on Partitioning, that seems to deal with breaking parts of the same table off onto other drives. I'm struggling to find information on how I pinpoint an ...
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290 views

Need to search users by latitude and longitude

I'm still learning SQL and this is a bit more advanced than my capabilities, so I could use some help. I think I need a sub-query or something. In the database I have a table called user with a ...
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MySQL Master-Master Replication Table Row COUNT() Inconsistency

I have two MySQL servers replicating to each other in a Master-Master typology. This has been working fine for several months now. Recently I've noticed some drift in one Master. There is a row ...
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248 views

Fulltext search returning too many rows

Server: MySQL 5.1.66-0+squeeze1 My problem: I have two databases with the same tables. One is for the testing environment and one for production. When I perform a MATCH AGAINST on the prodution ...
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565 views

SELECT + INSERT + Query Cache = MySQL lock up

MySQL server seems to constantly lock up and stop responding on certain types of queries and eventually (after couple of minutes of not responding) give up with an error "MySQL server has gone away", ...
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Delete operation mysql cluster

I am trying to delete some entries from table on a cluster and I get this error ERROR 1297 (HY000): Got temporary error 233 'Out of operation records in transaction coordinator (increase ...
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phpmyadmin Lock Down

I have a client that wants to use myphpadmin to manage his mysql database 5.x on my server. I found this article on how to hide databases from myphpadmin but I don't like this because if I don't ...
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Any drawback to lots of creating and renaming tables at InnoDB?

I'm trying to optimize an important cronjob for my program, and what it basically does is generate a long list of user ids with their score points. I have a table called user_ranks and it will bulk ...
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Deleting the MySQL 'root' user on purpose

I created a new mysql user with all the same privileges as the current 'root' user. For security reasons I thought why not create another user for this so people at least won't know the username of my ...
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Producing an outstanding fees report in MySQL

This question is about a MySQL stored procedure to select the records from two tables by joining them and also do some arithmetic operations in that. I have 3 tables for fees one is to store fee ...
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How to use a database across two availability zones

I have servers in the USA and Japan for my website. At the moment they are both connecting to a MySQL server in the USA, which is obviously perfect for my local USA clients but quite slow for my ...
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How do I safely import MySQL data in a directory to a running MariaDB server?

We're integrating another office into ours. That includes some of their data. I have a new installed MariaDB 5.5 server. The data dir = /home/data/MariaDB. I've done a new/fresh install into that ...
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Is it possible to keep track of changes to tables structure?

Is it somehow possible to keep track of changes made to the STRUCTURE (not the data) made to tables? I mean, i don't want to know when rows are inserted/updated/deleted, what i want is to know when ...
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Mysql key_buffer_size already 16GB but some fulltext searches are still slow

I have a query w/ full text search which takes 5 - 10 secs. key_buffer_size is already 16GB. Table has 15 million records and has a compound fulltext index on fields: categories and company. Table ...
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687 views

Mysql raising intermittent “system error: 32” errors on connect

I'm running mysql 5.6.12 on OSX 10.8 and getting an error like this one constantly: ERROR 2013 (HY000): Lost connection to MySQL server at 'sending authentication information', system error: 32 ...
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140 views

Any solution to fix circular replication fail-over?

I've developed a point-of-sale system for our corporation, which has 25+ branches across the country. Each branch has its own MySQL POS database on a WAMP server. I want every event that occurs in ...
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Duplicate GROUP_CONCAT values

Writing a plugin for Wordpress using a custom post type and an additional alias table to hold repetition of the post events. The problem comes with duplicate post meta values. wp_post_meta table: ...
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innobackupex: What causes Slave_open_temp_tables did not become zero after waiting 15 minutes?

As you might know, in order to assure a consistent replication state, the slave should be backup only when there are no open temporary tables: ...
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554 views

CSV File Into MYSQL Merging - LOAD DATA on Duplicate Key?

Hey Dba Stack Exchange, My question to you is with regards to mysql. Right now I have a medium to small sized csv with 25k lines I need imported into mysql for a client. Problem is, their is only ...
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Can't get rid of filesort on joined query sorting on second table

For some reason, this query: EXPLAIN SELECT * FROM biz as b INNER JOIN listings as l ON b.id = l.biz_id WHERE l.pub_id = 14 AND b.cat_id=310 ORDER BY l.level DESC, l.random DESC LIMIT 5; says it ...
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Import - database not found error

When I issue the following command: mysql -u user -ppassword database_name < /path_to_database.sql I get: sh: database_name: not found And it stops processing. I have created database_name ...
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371 views

Mysql 5.6 and install php5-mysql , mysql-common

I install Mysql 5.6 with this documentaion(in ubuntu 13.04) , now I need to install php5-mysql and mysql-common packages. can I install them with apt-get? I think they will install mysql5.5 ...
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476 views

How to sync mysql remote database daily ?

I have a database that contains orders , products ..etc. I have another system that generates reports based on this database. Due to heavy load i want to separate those systems Where i have the master ...