porsager / porsager/postgres

Using iteration with dynamic query builder

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Dominant language
JavaScript
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Description

I couldn't find a way to make dynamic query builder to work with iteration - map/reduce does not seem to work nicely. TBH, I didn't spend too much time trying.

Here's an example of how I made it to work:

const 

const rows = sql`select 1 from text where TRUE and
 ${search.text?.length ? sql`and (
   ${search.text[0] ? sql`   (btt.search_text @@ phraseto_tsquery('english', ${search.text[0]}))` : sql``}
   ${search.text[1] ? sql`OR (btt.search_text @@ phraseto_tsquery('english', ${search.text[1]}))` : sql``}
   ${search.text[2] ? sql`OR (btt.search_text @@ phraseto_tsquery('english', ${search.text[2]}))` : sql``}
   ${search.text[3] ? sql`OR (btt.search_text @@ phraseto_tsquery('english', ${search.text[3]}))` : sql``}
   ${search.text[4] ? sql`OR (btt.search_text @@ phraseto_tsquery('english', ${search.text[4]}))` : sql``} 
 )` : sql``}
ORDER BY 1
`;

obviously this is horrible.

Any suggestions?

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Research direction

The issue names no files or tests; start by reproducing the JavaScript example against PostgreSQL and examining how dynamic query fragments behave when built through iteration, map, or reduce. Define the intended iteration API and add coverage demonstrating that the reported search conditions can be assembled without manually indexing each element.

Written by the indexing model from the issue text.

Assessment

Tech stack
javascript, nodejs, postgresql
Domain
backend, databases
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
30/100

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