normalizing & join to table function - Mailing list pgsql-general

Hello,

Need some help.  Hoping some of the smart people might know how to solve this.

I’d like to replace all name/value pairs in a delimited string  with the id of the name/value pair in my reference table.

Eg

St=IL&city=Chicago&street=Madison

To

13&50&247

Assuming  St=IL  is id 13,  city=Chicago=50, street=Madison=247

My process is working but it’s taking too long to convert the string to rows. Any ideas for swaping out the cursor for a  sql trick?

Thanks in advance

Doug

I’m currently cursoring thru the input rows, and then converting the string to rows using  1^st array_to_string,  now explode_array.

-- Current code

   sql_cmd := ‘ SELECT   hash_page , log_cs_uri_query  FROM dim_wtlog_page_temp ‘;

   FOR recset IN EXECUTE sql_cmd LOOP

        insert into pagetag_temp (hash_page, wtlog_tagvalue_text)

         select recset.hash_page   ,qry.* as wtlog_tagvalue_text

         from explode_array (string_to_array(recset.log_cs_uri_query,'&') ) qry  ;

   END LOOP;

create or replace function explode_array( in_array anyarray)

returns setof anyelement as

$$

    select ($1)[s] from generate_series(1,array_upper($1, 1)) as s;

$$

language sql immutable;

Doug Little

Sr. Data Warehouse Architect | Business Intelligence Architecture | Orbitz Worldwide

500 W. Madison, Suite 1000  Chicago IL 60661| Office 312.260.2588 | Fax 312.894.5164 | Cell 847-997-5741

Douglas.Little@orbitz.com

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