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POCreate facsimile entries for all records stemming from a single reocrd within a parent table
 

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  1. POCreate facsimile entries for all records stemming from a single reocrd within a parent table
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    <p>I have a database which below object level is self-constructing or at least it creates and alters sibling tables as and when required and creates a relation between the table and the objects table.</p> <pre><code>Structure: &lt;Projects&gt; - id _______ &lt;collections&gt; .... | - id ______________ &lt;objects&gt; &lt;some_object&gt; |_____&gt; - project_id | - id___________________&gt; .... |___&gt; - collection_id | &lt;some_other_object&gt; .... |___&gt; | .... </code></pre> <p>Can anyone suggest a succinct method of creating a copy of each entry linked to a give collections record, which in turn would be linked to a new collections record?</p> <p>Each of the tables have an object_id column which has a foreign key constraint to objects.id, the rest of the table structure is likely to differ.</p> <p>Take the following example:</p> <pre><code>|Collections| ------------------ | id | Title | ------------------ | 1 | Col1 | | 2 | Col2 | ------------------ |Objects| -------------------------------------------- | id | Collection_id | Object Type | --------------------------------------------| | 1 | 1 | Classification | | 2 | 1 | Space | | 3 | 2 | Classification | --------------------------------------------| </code></pre> <p>The self-constructing element creates a table with the name of the Object type. This won't affect the approach but should make the next part of the example a less confusing.</p> <pre><code>|Classification (or other self-constructing table)| ------------------------------------------------------------ | id | object_id | Some column | ,,, | ,,, | --------------------------------------------|--------------- | 1 | 1 | val | | 2 | 1 | val | | 3 | 2 | val | --------------------------------------------| </code></pre> <p>So with the above records say we were looking to create a facsimile of "Col1" from collections and its dependents, we'll say the new collection.id = 3.</p> <p>The resulting table structure would be as follows.</p> <pre><code>|Collections| ------------------ | id | Title | ------------------ | 1 | Col1 | | 2 | Col2 | | 3 | Col1 | ------------------ |Objects| -------------------------------------------- | id | Collection_id | Object Type | --------------------------------------------| | 1 | 1 | Classification | | 2 | 1 | Space | | 3 | 2 | Classification | | 4 | 3 | Classification | | 5 | 3 | Space | --------------------------------------------| |Classification (or other self-constructing table)| ------------------------------------------------------------ | id | object_id | Some column | ,,, | ,,, | --------------------------------------------|--------------- | 1 | 1 | val | | 2 | 1 | val | | 3 | 2 | val | | 4 | 4 | val | | 5 | 4 | val | | 6 | 5 | val | --------------------------------------------| </code></pre> <p>Effectively cloning the entire object structure and it's children for a given node (node used as id)</p>
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    1. PTQuestion
    1. USCBusBus
    1. USCBusBus
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      1. POCreate facsimile entries for all records stemming from a single reocrd within a parent table
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      1. VTUpMod
    1. COCould you elaborate a bit on what you're trying to accomplish? The question is a bit vague as is.
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      1. USGordonM
 

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