information schema : ODBC standard Views of RDBMS MetaData

learn more… | top users | synonyms

10
votes
1answer
11k views

How is INFORMATION_SCHEMA implemented in MySQL?

The INFORMATION_SCHEMA is, in theory, a set of views specified in the SQL standard that allow the user to inspect the system's metadata. How is it this implemented in MySQL? When I connect to a fresh ...
1
vote
1answer
515 views

Is there a way to find the least recently used tables in a schema?

Is there a way to find the least recently used tables in a MySQL schema? Besides going into data directories? I was hoping there was a metadata or status trick-- but Update_Time in STATUS and ...
1
vote
1answer
319 views

mysqldump, preserve update_time and modify_time attributes as listed by show table status from

Does mysqldump preserve the create_time and update_time attributes that are output by show table status from? If not, is there an option that does this? From the manual it looks like mysqldump ...
43
votes
3answers
81k views

How do I list all columns for a specified table

I'm looking for a precise piece of information in a database which I have no knowledge about. It's a 3rd party product, they are slow on answering some questions, and I know the data is lying inside ...
3
votes
1answer
109 views

Query the definition of a materialized view in Postgres

I'm wondering how to query the definition of a materialized view in Postgres. For reference, what I hoped to do is very similar to what you can do for a regular view: SELECT * FROM ...
1
vote
2answers
122 views

mysql information schema database last used datetime

I have a lot of tables in my database, almost 1,000. Most of them I am not using now. Is there any way to know from the information schema tables when I have last used my tables?
1
vote
1answer
322 views

Why are these queries slow in some environments and not others? Can we fix their performance?

The following stored procedures in a MySQL 5.x environment: DELIMITER // CREATE PROCEDURE sp_belongs_to (IN schemaName VARCHAR(100), IN tableName VARCHAR(100)) BEGIN SELECT TABLE_NAME as ...