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POMysql Function - not sure where to start
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15204187
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15205759
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2013-03-04T14:45:16.287
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2013-03-04T16:04:00.283
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2013-03-04T16:01:08.743
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1946261
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I would like to write a function in Mysql that from a given product code return a formatted string Here is an example of the calls I need to manually make now to get the result I want. <pre><code>SELECT p.productcategoryid from products p where (isnull(p.endeffdt) or (p.endeffdt = '0000-00-00') or (p.endeffdt > now())) and p.code='T29R66N1'; </code></pre> T29R66NQ is the product code I need the full path for - the above call returns '38' as the category ID. I then perform the following select based on the result from above <pre><code>SELECT name,parentid,productcategorypath FROM productcategory WHERE recid = '38'; </code></pre> This returns name->Built-In Hobs parentid->7 productcategorypath=222,7,38 Using that result I then <pre><code>SELECT name,parentid,productcategorypath FROM productcategory WHERE recid = '7'; </code></pre> giving me name->Built-In parentid->222 productcategorypath=222,7 and again, I then do <pre><code>SELECT name,parentid,productcategorypath FROM productcategory WHERE recid = '222'; </code></pre> which in turn gives me name->Kitchen & Home Appliances parentid->0 productcategorypath=222 I stop there because parentid = 0 (it may go on for more iterations but will always end with parent id of 0) but i need the results from the last 3 selects to give me the following string <pre><code>Kitchen & Home Appliances > Built-In > Built-In Hobs </code></pre> I would like a mysql function whereby I can use it like <pre><code>select getpath(code) from products where code='T29R66N1' </code></pre> Any help would be appreciated. EDIT: I managed to figure it myself - here is my function <blockquote> DROP FUNCTION IF EXISTS mydb.getpath; CREATE FUNCTION mydb.getpath (itemid VARCHAR(20)) RETURNS varchar(255) BEGIN DECLARE path_name varchar(255); DECLARE tmp_name varchar(255); DECLARE tmp_parentid INT; DECLARE tmp_parentid1 INT; SELECT p.productcategoryid INTO tmp_parentid from products p where (isnull(p.endeffdt) or (p.endeffdt = '0000-00-00') or (p.endeffdt > now())) and p.code=itemid; myloop:LOOP <blockquote> SELECT name,parentid INTO tmp_name,tmp_parentid1 FROM productcategory WHERE recid = tmp_parentid; SET path_name = concat_ws(' > ', tmp_name,path_name); IF tmp_parentid1!=0 THEN SET tmp_parentid = tmp_parentid1; ITERATE myloop; ELSE LEAVE myloop; END IF; END LOOP; </blockquote> RETURN path_name; END; </blockquote>
Tags
<mysql><function><cursor>
Title
Mysql Function - not sure where to start
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PostAcceptedAnswerId
1. PO
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1. This table or related slice is empty.
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1. PTQuestion
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1. USl0ckm4
UserOwnerUserId
1. USl0ckm4
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1. COThe structure you are using is called an *adjacency list*. Here's a reference to get you started: http://ulaptech.blogspot.ca/2010/05/retrieving-data-hierarchies-on-sql.html
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 POMysql Function - not sure where to start
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 USdnagirl
2. COthanks @dnagirl for your comment :-)
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 POMysql Function - not sure where to start
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 USl0ckm4

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