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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Comic Sans MS","serif"">select<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Comic Sans MS","serif""> *<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Comic Sans MS","serif"">from<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Comic Sans MS","serif""> tab1, tab2<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Comic Sans MS","serif"">Where<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Comic Sans MS","serif""> tab1.hk_id = tab2.hk_id -- Assuming you have a ID column in both tables . . .<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Comic Sans MS","serif"">AND<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Comic Sans MS","serif""> tab2.y_max < tab1.h_max<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Comic Sans MS","serif"">AND<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Comic Sans MS","serif""> tab2.y_max > tab1.h_min<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Comic Sans MS","serif"">order by
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Comic Sans MS","serif""> tab2.height<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Comic Sans MS","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Comic Sans MS","serif"">Bobb<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-left:.5in"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> postgis-users-bounces@lists.osgeo.org [mailto:postgis-users-bounces@lists.osgeo.org]
<b>On Behalf Of </b>mane moshref<br>
<b>Sent:</b> Wednesday, March 05, 2014 10:38 AM<br>
<b>To:</b> postgis-users@lists.osgeo.org<br>
<b>Subject:</b> [postgis-users] writing loop and conditionals in pl/pgsql<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-left:.5in;background:white"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif";color:black">Hi all,<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-left:.5in;background:white"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif";color:black">I am quite new to pl/pgsql and completely confused.
<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-left:.5in;background:white"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif";color:black">I have two tables. One storing height category including hk_id(height category id), h_min and h_max. and a table including
several plygons having y_max and height. My aim is to know on which height category the plygon locates based on its y_max.<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-left:.5in;background:white"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif";color:black">My piece of code is like:<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-left:.5in;background:white"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif";color:black">i=1; a=0;<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-left:.5in;background:white"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif";color:black">while (i=<4 , a=0){<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-left:.5in;background:white"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif";color:black">if h(i)_min < y_max < h(i)_max<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-left:.5in;background:white"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif";color:black">{height = i<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-left:.5in;background:white"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif";color:black">a = 1;}<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-left:.5in;background:white"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif";color:black">i = i + 1<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-left:.5in;background:white"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif";color:black">}<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-left:.5in;background:white"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif";color:black">Is there any body who can help me to convert this piece of code to excutable format in pl/pgsql?<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-left:.5in;background:white"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif";color:black">Thank you in advance<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-left:.5in;background:white"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif";color:black">Many<o:p></o:p></span></p>
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