A function performs some specified work, usually taking parameters as input. In terms of databases these may be specific to SQL or to the database vendor.

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5
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2answers
424 views

Optimize queries from MySQL SP/Triggers/Functions

I have to investigate a MySQL Production server,While investigating I found a DELETE query in "SHOW PROCESSLIST" which was taking more than 400 second in preparing state, I tried to find the query in ...
0
votes
1answer
64 views

How to add up a column depending on data from another column

I have a table which has results and a table that has band_name and band_id. Now I need to create a query which will add up the total points for each band and display the band name and ID, so far I ...
1
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0answers
133 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 ...
3
votes
2answers
830 views

Call multiple functions from trigger?

I run PostgreSQL-9.2.4 Is it possible to call 2 functions from a trigger? Let's say I have two functions for two different tables to be executed if following trigger fires: Trigger: CREATE TRIGGER ...
0
votes
1answer
748 views

Calling another function inside a postgres function

I have a function A and function B. Function A Name is f_a() and the code is: Select id,address from A; Function B Name is f_b() code is: Select C.address,B.name From (Select id,name from B, ...
3
votes
1answer
5k views

Postgres function assign query results to multiple variables

I need to assign values to 2 variable as below in Postgres function. a := select col1 from tbl where ... b := select col2 from tbl where ... How can I assign 2 values to 2 variables in one line ...
1
vote
3answers
382 views

Proper use of database functions for business logic

I have a database in postgres with 147 tables; these tables contain data generated by functions that have most of the logic of the system, for example how to build an accounting entry. These ...
3
votes
1answer
1k views

Table-valued function runs fast, but slow from another function [closed]

Disclaimer: I'm a senior sysadmin who's trying to help our development team speed up the production database. Our users are hurting, bad. Please don't shoot me for not being great with SQL The ...
3
votes
1answer
126 views

PL/pgSQL functions and optimizations fences?

I am newbie on DB stuff. And my DB knowledge is very old (around MSSQL2000). All what I remember is, the stored procedures are faster than ordinary queries because it avoid query compilation and ...
0
votes
1answer
198 views

use function arguments or variable in postgres function

I want to set the default value for the column building and floor in my table points in the below function called test(b,f) Create or replace function test(b text, f text) returns void as $$ Begin ...
1
vote
1answer
469 views

Tree structure hierarchical query sorting

I have the following structure of table. CREATE TABLE table1 ( serial_num integer NOT NULL, parent_num integer, parent_key text, key_ary_num integer[], level integer, rank integer, ...
0
votes
2answers
669 views

Recursive update for tree structure in PostgreSQL

I have the following structure of table. id chNum parentid --- ------ --------- 1 1 NULL 2 1.1 1 3 1.1.1 2 4 2 ...
0
votes
1answer
133 views

Selecting from a function that returns a sys refcursor or an alternative

I have a query that returns a resultset of three columns, namely SSN,PAID_YEAR and PAID_TOTAL. From this query I can: Create a view and then query it. Create a function and return resultset If I ...
0
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0answers
62 views

Postgresql function taking long time on newly restored database

I have developed one function in my PostgreSQL database. It was taking 12-15 seconds to execute. Now I have restored a new PostgreSQL 9.0 dump using following command: pg_restore -hx.x.x.x -p5432 -d ...
1
vote
1answer
4k views

Dynamic SQL is not allowed error for creating function in MySQL

According to this question and answer of Angelo I create a MySQL function as below: DELIMITER $$ CREATE FUNCTION hierarchy_connect_by_parent_eq_prior_id(value INT, reqdTable VARCHAR(50)) RETURNS INT ...
1
vote
0answers
124 views

Inline TVF with One Row Result

I have several times converted scalar functions into inline tvf. Usually this is the basic design I used in inline tvf: CREATE FUNCTION TVF(@ID INT) RETURNS TABLE AS RETURN( WITH BASE AS( ...
1
vote
2answers
917 views

Reducing size of image returned by view

We are storing a list of images in a table in an image column. These are stored as their raw image size so they can be viewed in their details at full resolution. The problem I have is I want to show ...
1
vote
1answer
1k views

How to call an Oracle Function with multi out Parameters though LINKSERVER

I need help as I am facing this problem. when I pass 2 output parameter to a function through a linked server I am getting this error. For 1 out parameter its working fine but when I use two output ...
3
votes
1answer
475 views

Running functions in parallel

This is for SQL Server 2012. We have some import processes for FTP files that are picked up and read into a staging table, from there we massage/check the data before moving into production. One of ...
4
votes
2answers
1k views

Postgresql function to create table

I want to create a function in order to create a table with a specific structure pasing part of the name of the table as an argument so the name of the table is t_ . Similar to this: CREATE OR ...
-1
votes
1answer
78 views

checking a folder whether required file is present at a regular interval [closed]

i have 4 folder hierarchy in a following format : Hourly Daily Weekly Monthly. In every folder i have files which is coming in a frequency based on their folder's name. Now , i have ...
1
vote
2answers
2k views

Can SQL Server 2008 / 2012 have execute permission in a function for a user, but not for a table used in the function?

I have a function that returns a table. This function SELECTS DB1.dbo.table1 user1 has SELECT permission in this function only, but when selecting from the function error comes up stating that the ...
1
vote
1answer
1k views

Pass a table array as a parameter to an upsert function in postgresql

i have an UPSERT function which works well but i update and insert records in batches, can this function be modified so that i just pass all the records to this function as an array then it will ...
1
vote
0answers
324 views

Calling a function in remote database inside a stored procedure

There are 2 Oracle databases with pseudo names Remote and Local. I have a function in Remote called FUS.F_Return_10 which simply returns 10 for testing purposes, where FUS is a schema name. In Local I ...
3
votes
1answer
1k views

How does this undocumented syntax work? {fn CurDate()} or {fn Now()} etc

Recently I've been looking through some fairly old stored procedures that were written for SQL Server 2005, and I've noticed something that I don't understand. It appears to be some type of function ...
0
votes
1answer
105 views

Cannot create perlplu function

Running PostgreSQL 9.1.8 on Xubuntu 12.04, installed from the repos. From the shell, I have executed: createlang plperl db_name; createlang plperlu db_name; As the superuser running psql, I have ...
3
votes
1answer
375 views

How to access the number of rows accumulated by RETURNs in PL/pgSQL

When performing RETURN QUERY ... in a PL/pgSQL function, is it possible afterwards to directly access the number of rows accumulated into the pile of records, which are returned when the function ...
2
votes
2answers
2k views

Recursive query using plpgsql

I'm trying to write a plpgsql function that recursively returns a set of columns from records in a tree structure. I have a data table and a table to link the data together: DATATABLE ----------- id ...
14
votes
1answer
10k views

Create index if it does not exist

I am working on a function that allows me to add an index if it does not exist. I am running into the problem that I cannot get a list of indexes to compare to. Any thoughts? This is a similar issue ...
6
votes
3answers
2k views

How to pass a table type with an array field to a function in postgresql

i have a table called book CREATE TABLE book ( id smallint NOT NULL DEFAULT 0, bname text, btype text, bprices numeric(11,2)[], CONSTRAINT key PRIMARY KEY (id ) ) and a ...
-1
votes
1answer
237 views

Undefined reference to my function [closed]

I'm working on a project on postgresql 8.4 server side. I'm adding some functionality in order to store some query informations. I need to call two functions (start_create_profile() and check()) ...
2
votes
1answer
245 views

Parameter triggers different execution plan, but why?

I have a table CREATE TABLE [dbo].[Numbers] ( [Date] [date] NULL, [Time] [time](3) NULL, [Value] [char](10) NULL ) and the table has > 10 Billion rows, therefore it ...
7
votes
3answers
1k views

Store a formula in a table and use the formula in a function

I have a PostgreSQL 9.1 database where part of it handles agent commissions. Each agent has his/her own formula of calculation how much commission they get. I have a function to generate the amount of ...
1
vote
1answer
5k views

Invalid use of side-effecting operator 'INSERT EXEC' within a function [closed]

I'm trying to create a scalar function that will return a delimited list from some sql that would be passed in. Unfortuantly where I work the previous people responsible for the database thought it ...
5
votes
1answer
2k views

Oracle extract slow function call from a WHERE clause

I have an oracle table in which dates are stored as the number of minutes since a specific date. It looks something like this: CREATE TABLE MY_TABLE ( SOMETHING NUMBER(15,1) NOT NULL, ...
0
votes
2answers
146 views

looping through a table type variable

I have a function that has one parameter of a table type, i want to loop through all the fields and return the column that has a null or empty value. CREATE OR REPLACE FUNCTION ...
0
votes
2answers
1k views

Interactive INSERT / UPDATE function to implement UPSERT

I have a function in PostgreSQL 9.1 that I want client applications to be passing a record object and the function will detect if it's an insert or an update and return the operation done, i.e "1 ...
1
vote
1answer
582 views

PostgreSQL How do I convert struct text to plain *char in C functions?

I'm using my internal C function which doesn't know about postgresql's text struct, how do I pass text argument when char * expected? #include <stdio.h> #include <string.h> #include ...
0
votes
2answers
160 views

SQL Server 2008 - How did I solve the need to check the column definitions quickly?

Another tool I developed for myself, with regards to making the creation of various DML operations easier in a large database of hundreds of tables, is a nifty user defined function to easily show ...
1
vote
3answers
654 views

Support both stored procedures and functions with same TSQL code base?

We have a need for both Microsoft SQL Server 2008 functions (ITVFs) and stored procedures to provide the same interface and functionality to end-user reporting frontends. Given the following ...
3
votes
2answers
208 views

Custom Postgres function not working

I wrote this function that is supposed to iterate through a text array and convert each element (which is a typecasted integer) to hex, append to a text variable, then return the hex. However, I get ...
5
votes
2answers
635 views

SQL Server SMO and PowerShell formatting

I have probably been looking at this for too long to figure this out... What is the easiest way I could get this exported to a CSV format? Would it be better to dump this to a table in a database ...
4
votes
1answer
286 views

How Can the Same Query in Two Nearly Identical Instances Generate Two Different Execution Plans?

Server A and Server B have identical hardware and instance configurations (A is Production, B is QA). B's DBs were restored from A's backups from one week ago. I was provided this query by the ...
1
vote
1answer
600 views

How can I restore the sql_variant_property of baseType back to a table variable in SQL Server

Ok, I know the title is confusing but here it goes. BTW I am using SQL Server 2008 I have a table that I am trying to use as a storage container. It has 3 columns: reportID integer, dataLabel ...
3
votes
2answers
628 views

How to concatenate a column after x rows?

I have a table with columns object varchar(255), frequency tinyint(3) unsigned, I want to concatenate the objects if the sum of frequencies reach a value. Currently I am doing this in PHP as .. ...
6
votes
1answer
514 views

Estimated versus actual query plan with function calls

I have this query on SQL server, a merge replication query: SELECT DISTINCT b.tablenick, b.rowguid, c.generation, sys.fn_MSgeneration_downloadonly ( c.generation, ...
3
votes
1answer
640 views

A function to check if a column allows NULL

Is there a way to write an insert/update query that checks if a column allows NULLs: If it does set the column to NULL, and '' (empty string) otherwise? I would be something like: UPDATE mytable ...
2
votes
1answer
244 views

Create Enumerated Function Parameter Type

I want to create a function similar to DATEDIFF in MS SQL Server 2008 R2. The first parameter in DATEDIFF is a datepart. Can I use datepart as a parameter in my function? If not, how do I create a ...
2
votes
1answer
930 views

Is a query with UNIX_TIMESTAMP using indexes in mysql?

If I use .. WHERE UNIX_TIMESTAMP(`some_timestamp`)>NOW() in a SELECT, does this query still make use on an index, set on some_timestamp ?
1
vote
1answer
1k views

MySQL - Create a function from another function

I want to create a function same like my old functions. When I create a table, I can use `AS to other table as follows: CREATE TABLE dummy2 AS SELECT * FROM dummy1; Can I do the same thing with ...