<div class="Section1"><p class="MsoNormal"><font face="Arial" size="2"><span lang="EN-US" style="font-size:
10.0pt;font-family:Arial">I want to write a selectivity function for GIST indexes.</span></font><p
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10.0pt;font-family:Arial"> </span></font><p class="MsoNormal"><font face="Arial" size="2"><span lang="EN-US"
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10.0pt;font-family:Arial">The select condition is somefield && array[1,2,3],</span></font><p
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10.0pt;font-family:Arial">But when I’m inside selectivity function I get args: T_Var, T_Const.</span></font><p
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10.0pt;font-family:Arial">So function needs to get the actual array contents from T_Const .</span></font><p
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10.0pt;font-family:Arial">How to do it ?</span></font><p class="MsoNormal"><font face="Arial" size="2"><span
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10.0pt;font-family:Arial">P.S</span></font><p class="MsoNormal"><font face="Arial" size="2"><span lang="EN-US"
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10.0pt;font-family:Arial">T_Const is like</span></font><p class="MsoNormal"><font face="Arial" size="2"><span
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10.0pt;font-family:Arial">$18 = {xpr = {type = T_Const}, consttype = 1007, constlen = -1, constvalue = 138884428,
constisnull= 0 '\0',</span></font><p class="MsoNormal"><font face="Arial" size="2"><span lang="EN-US" style="font-size:
10.0pt;font-family:Arial"> constbyval = 0 '\0'}</span></font><p class="MsoNormal"><font face="Arial" size="2"><span
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10.0pt;font-family:Arial"> </span></font><p class="MsoNormal"><font face="Arial" size="2"><span lang="EN-US"
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10.0pt;font-family:Arial">Thank you!</span></font></div>