There is a table in redshift, which is causing a problem to complete a run as it has huge data set. So I need to replace the table with another table. This table is present in few stored procedure code. But here is a challenge. There are around 300+ stored procedure in the database. So, anyone please help me to write with a query, like what are list of procedures that using the particular table.
You could query the catalog pg_proc like this to find out if <particular table> is used in a stored procedure:
SELECT n.nspname as schema_name,
u.usename as sp_owner,
p.proname as stored_procedure_name,
p.prosrc as procedure_source
FROM pg_catalog.pg_namespace n
JOIN pg_catalog.pg_proc p ON pronamespace = n.oid
JOIN pg_catalog.pg_user u on u.usesysid = p.proowner
where prosrc like '%<particular table>%';
Or you could use PG_PROC_INFO, a Redshift system view built on the PostgreSQL catalog table PG_PROC and the internal catalog table PG_PROC_EXTENDED.
Related
On occasion, I'm interested in getting a list of columns in one of the tables or views in my SQL Server 2008 R2 database. It's useful, for example, if you're building database documentation without using an expensive off-the-shelf product.
What's an easy way to get this information?
In SQL Server 2008 R2 (among other versions), there are system views provided automatically with every database. As long as you are connected to the database where your table resides, you can run a query like this:
DECLARE #TableViewName NVARCHAR(128)
SET #TableViewName=N'MyTableName'
SELECT b.name AS ColumnName, c.name AS DataType,
b.max_length AS Length, c.Precision, c.Scale, d.value AS Description
FROM sys.all_objects a
INNER JOIN sys.all_columns b
ON a.object_id=b.object_id
INNER JOIN sys.types c
ON b.user_type_id=c.user_type_id
LEFT JOIN sys.extended_properties d
ON a.object_id=d.major_id AND b.column_id=d.minor_id AND d.name='MS_Description'
WHERE a.Name=#TableViewName
AND a.type IN ('U','V')
Of course, this is just a starting point. There are many other system views and columns available in every database. You can find them through SQL Server Management Studio under Views > "System Views
Another way is querying the INFORMATION_SCHEMA.columns view as detailed here:
Information_Schema - COLUMNS
This will give you information for all the columns in the current database (and what table/view they belong to) including their datatypes, precision, collation and whether they allow nulls etc
Usefully as well, these views are maintained in multiple DBMS programs too, so you could potentially use the same or similar query to get the same information regarding a MySQL database as you can a SQL Server DB, which could be useful if you are developing on multiple platorms.
sp_columns returns detailed information about each of the columns in the table. SO Answer
sp_columns #tablename
sp_help returns detailed information about the entire table including the columns and constraints. SO Answer
sp_help #tablename
To get a list of Columns of a view with some other information about the column you can use the following:
SELECT * FROM sys.columns c, sys.views v
WHERE c.object_id = v.object_id
AND v.name = 'view_Name'
GO
And if you only want the list of Column Name use this.
SELECT c.name
FROM sys.columns c, sys.views v
WHERE c.object_id = v.object_id
AND v.name = 'view_UserAssessphers'
GO
exec sp_helptext <your view name>
Also works for the view only, blachniet's answer is best if you need details on the columns in the table.
In a new query window, type the name of the view/table, highlight it, and press Alt-F1. This will run sp_help, like blachniet suggested.
simple list of column names without any further information.
SELECT COLUMN_NAME FROM TABLENAME.INFORMATION_SCHEMA.COLUMNS;
Replace TABLENAME with your tables name.
i have used SQL server 2012 and made a huge database with many relations. today i realized using "NCHAR" instead on "NVARCHAR" adds space on end of strings which i don't like it. is there any way to recreate database with relations. I've tried "drop and create" for tables but needs to remove all relations and define them again which is very time consuming.
It's possible to alter only the affected tables? like this:
SELECT 'alter table '+s.name+'.'+t.name+
' alter column '+c.name+' nvarchar('+convert(varchar(11),c.max_length/2)+') go'
FROM sys.tables as T
inner join sys.schemas as s
on T.[schema_id]=s.[schema_id]
inner join sys.columns as C
on T.[object_id]=C.[object_id]
and c.system_type_id=239--nchar type
, and before that don't forget to use the same kind of mechanism to generate an update statement to remove extra spaces.
I have access to a MS SQL Server with MS Access via ODBC and I want to display the table names, their column names and the number of rows per table. The table names are stored in a table named "sys_tables", the column names in "sys_columns". Unfornunately the number of rows per table has to be counted. As I'm not experienced in SQL, my first try is not working:
SELECT t.name, c.name, t.object_id, x.cnt
FROM sys_tables AS t INNER JOIN sys_columns AS c ON t.object_id = c.object_id
LEFT OUTER JOIN (SELECT COUNT(*) AS cnt FROM #t.name AS tbl ON tbl.cnt > 0) AS x
What is the right way to use a computed string in a SELECT as table name? Can I do a sub select that selects all rows without real relation?
You can't use a variable table name in a SQL statement on the server side. You will need to get the table names from SQL Server and then use those to send new queries (one for each table) back to SQL Server. You could also write a stored procedure on the SQL Server to handle this using dynamic SQL (just be sure that you are familiar with injection attacks whenever you are using dynamic SQL).
SQL Server stores some row count information in sysindexes (not to be confused with sys.indexes) in the rowcnt column. This information is not always 100% accurate though.
Finally, you can use the undocumented stored procedure sp_MSForEachTable like so:
EXEC sp_msForEachTable
'SELECT PARSENAME(''?'', 1),
COUNT(*) FROM ?'
Be aware that this last method will return multiple result sets (one for each table), so you need to handle it that way in Access or combine them together in a temporary table and then return them as one result set. You can do all of that in a stored procedure.
You cannot use a variable for a table name. The only workaround is dynamic SQL.
However, I suspect that there's a table somewhere in sys which gives the row count for each table, though it may not be kept perfectly up-to-date.
Can't you do this:
SELECT COUNT(t.name)
FROM sys_tables AS t INNER JOIN sys_columns AS c ON t.object_id = c.object_id
I have created a new database with copies of existing tables but changed the names of these tables, is there a SQL script that I can run (maybe using SysObjects) to change all references to these tables in all stored procedures?
DO NOT RELY ON INFORMATION_SCHEMA.ROUTINES because ROUTINE_DEFINITION is only nvarchar(4000). You need to sys.sql_modules where definition is nvarchar(max)
try any of these to find the procedure that you need to modify:
SELECT DISTINCT
LEFT(s.name+'.'+o.name, 100) AS Object_Name,o.type_desc --, m.definition
FROM sys.sql_modules m
INNER JOIN sys.objects o ON m.object_id=o.object_id
INNER JOIN sys.schemas s ON o.schema_id=s.schema_id
WHERE m.definition Like '%'+#SearchValue+'%'
ORDER BY 1
SELECT
OBJECT_SCHEMA_NAME(m.object_id)+'.'+OBJECT_NAME(m.object_id) --, m.definition
FROM sys.sql_modules m
WHERE m.definition like '%whatever%'
SELECT
OBJECT_SCHEMA_NAME(m.object_id)+'.'+OBJECT_NAME(m.object_id), o.type_desc
--,m.definition
FROM sys.sql_modules m
INNER JOIN sys.objects o ON m.object_id=o.object_id
WHERE m.definition like '%whatever%'
you can uncomment m.definition to list out the content, but I find it better to just ID all the procedures and then review them manually, because you don't want to run UPDATE commands on the system tables. Script out the necessary procedures, make the changes (search/replace or manually), and then run the scripts!!!
No.
I believe SQL Refactor from Redgate has this functionality. Otherwise you could script out all objects and either manually or via code do a search and replace.
SQL Server 2005 also has support for synonyms that might be of some help.
Here is a chunk of SQL that you could use to retrieve the definition of stored procedures that match a certain search criteria. You could simply change it to do a search and replace like Martin had suggested.
Simply change '%TABLE_NAME%' to your search criteria or the table name you would like to change.
SELECT ROUTINE_NAME, ROUTINE_DEFINITION
FROM INFORMATION_SCHEMA.ROUTINES
WHERE ROUTINE_DEFINITION LIKE '%TABLE_NAME%' AND ROUTINE_TYPE='PROCEDURE'
If it's short term (like a testing database), the easier solution may be to make a VIEW for each table that you changed, using the old name. For instance, if you changed the table tests to tests_new you can do:
CREATE VIEW dbo.tests
AS
SELECT * FROM dbo.tests_new
All your procedures will that reference dbo.tests will actually look at the data in dbo.tests_new.
This is a very very bad idea if this will be a permanent/production DB, as it just adds a layer of obfuscation to your structure and will make it a nightmare to maintain.
You can't change the table references in sprocs through the system data dictionary - you will have to get the script that creates the stored procedure and change the table names in the script. If you have the scripts this is a simple search and replace for the most part.
If you don't have the scripts you can get the text of the stored procedure scripts from sys.sql_modules, or retrieve it through SSMS.
I am writing a query that will return
if a table or stored proc exists within a database
if a particular role has been assignned execute permissions to execute that particular stored proc.
I guess I need to query the master database and wiggle thru that to get to the database and the table or stored proc that I am looking for. How can I get a 'true / false' if execute permissions have been assigned to a particular role on that object?
USE YourDatabase
/*To find out if it exists*/
SELECT OBJECT_ID('dbo.spFoo') /*Will be NULL if it doesn't exist or you don't have
permission to see the object*/
/*To find out the permissions on it take a look at the following system views*/
select * from sys.database_permissions p
inner JOIN sys.database_principals dp
on p.grantee_principal_id = dp.principal_id
where major_id=object_id('dbo.spFoo')