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@ -32,9 +32,9 @@ ALGuidelines.Dev
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@ -249,11 +249,8 @@ ALGuidelines.Dev
<nav id=TableOfContents>
<ul>
<li><a href=#abstract>Abstract</a></li>
<li><a href=#description>Description</a>
<ul>
<li><a href=#description>Description</a></li>
<li><a href=#ending-date-problem>Ending Date Problem</a></li>
</ul>
</li>
<li><a href=#usage>Usage</a>
<ul>
<li><a href=#1-create-the-view>1. Create the view</a></li>
@ -296,7 +293,7 @@ A side effect is reduced and simplified code, increased performance and a more s
<p>The NAV Service Tier receives and throws away data.</p>
</li>
</ul>
<h3 id=ending-date-problem>Ending Date Problem</h3>
<h2 id=ending-date-problem>Ending Date Problem</h2>
<p>Ending Date may introduce some problems of its own.</p>
<p>If your design requires to have one and only one active record per key in a dataset, then Ending Date introduces the possibility for overlapping or holes in the timeline.<br>
Ending Date creates a dependency between two records. Changing a Starting Date, requires you to update the previous record. Changing the Ending Date requires you to update the next record.<br>
@ -310,20 +307,20 @@ If you add a record in between you will have to update both the before and the a
<h3 id=1-create-the-view>1. Create the view</h3>
<p>You will need to create the view before you define the Table Object.<br>
You will need to create a view for every company in the database.</p>
<div class=highlight><pre tabindex=0 style=color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-sql data-lang=sql> <span style=color:#66d9ef>CREATE</span> <span style=color:#66d9ef>VIEW</span> [dbo].[CRONUS$PriceView]
<span style=color:#66d9ef>AS</span>
<span style=color:#66d9ef>SELECT</span> [Code], [Starting Date], [Price]
<span style=color:#66d9ef>FROM</span> dbo.[CRONUS$Price] <span style=color:#66d9ef>AS</span> A
<span style=color:#66d9ef>WHERE</span> [Starting Date] <span style=color:#f92672>=</span>
(<span style=color:#66d9ef>SELECT</span> <span style=color:#66d9ef>MAX</span>([Starting Date])
<span style=color:#66d9ef>FROM</span> dbo.[CRONUS$Price] <span style=color:#66d9ef>AS</span> B
<span style=color:#66d9ef>WHERE</span> B.[Code] <span style=color:#f92672>=</span> A.[Code] <span style=color:#66d9ef>AND</span>
B.[Starting Date] <span style=color:#f92672>&lt;=</span> GETDATE())
<div class=highlight><pre tabindex=0 style=color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-sql data-lang=sql><span style=color:#66d9ef>CREATE</span> <span style=color:#66d9ef>VIEW</span> [dbo].[CRONUS$PriceView]
<span style=color:#66d9ef>AS</span>
<span style=color:#66d9ef>SELECT</span> [Code], [Starting Date], [Price]
<span style=color:#66d9ef>FROM</span> dbo.[CRONUS$Price] <span style=color:#66d9ef>AS</span> A
<span style=color:#66d9ef>WHERE</span> [Starting Date] <span style=color:#f92672>=</span>
(<span style=color:#66d9ef>SELECT</span> <span style=color:#66d9ef>MAX</span>([Starting Date])
<span style=color:#66d9ef>FROM</span> dbo.[CRONUS$Price] <span style=color:#66d9ef>AS</span> B
<span style=color:#66d9ef>WHERE</span> B.[Code] <span style=color:#f92672>=</span> A.[Code] <span style=color:#66d9ef>AND</span>
B.[Starting Date] <span style=color:#f92672>&lt;=</span> GETDATE())
</code></pre></div><p>Test the view to ensure that you get the correct result. It is much easier to test now than later.</p>
<h3 id=2-create-the-table-object>2. Create the Table object</h3>
<p>Remember to set the link table property before you save it.</p>
<h3 id=3-implement-the-code>3. Implement the code</h3>
<div class=highlight><pre tabindex=0 style=color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-al data-lang=al> <span style=color:#66d9ef>IF</span> PriceView<span style=color:#f92672>.</span>FINDSET <span style=color:#66d9ef>THEN</span> <span style=color:#75715e>// You have them
<div class=highlight><pre tabindex=0 style=color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-al data-lang=al><span style=color:#66d9ef>IF</span> PriceView<span style=color:#f92672>.</span>FINDSET <span style=color:#66d9ef>THEN</span> <span style=color:#75715e>// You have them
</span></code></pre></div><h3 id=4-create-a-deployment-codeunit>4. Create a deployment codeunit</h3>
<p>Create a SQL Deployment codeunit to manage your views.<br>
The codeunit needs to Create or Alter the views for all companies.<br>
@ -392,12 +389,12 @@ The Pattern makes a scalable solution with a predictable performance. The perfor
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