Error passing parameter to functions

<div class="Section1"><p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><font face="Courier
New"size="2"><span style="font-size:10.0pt;font-family:"Courier New"; 
mso-ansi-language:EN-US">HI, </span></font><p class="MsoNormal"
style="mso-layout-grid-align:none;text-autospace:none"><fontface="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US"> </span></font><p class="MsoNormal"
style="mso-layout-grid-align:none;text-autospace:none"><fontface="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US">Could someone tell me what I am doing wrong please (<span class="SpellE">Postgresql</span>
7.2).<span style="mso-spacerun:yes"> </span>Thanks</span></font><p class="MsoNormal"
style="mso-layout-grid-align:none;text-autospace:none"><fontface="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US"> </span></font><p class="MsoNormal"
style="mso-layout-grid-align:none;text-autospace:none"><fontface="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US"> </span></font><p class="MsoNormal"
style="mso-layout-grid-align:none;text-autospace:none"><fontface="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US">The functions I am creating <span class="GramE">is</span>:</span></font><p class="MsoNormal"
style="mso-layout-grid-align:none;text-autospace:none"><fontface="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US"> </span></font><p class="MsoNormal"
style="mso-layout-grid-align:none;text-autospace:none"><fontface="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US"> </span></font><p class="MsoNormal"
style="mso-layout-grid-align:none;text-autospace:none"><fontface="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US"><span style="mso-spacerun:yes">   </span>CREATE OR REPLACE FUNCTION <span
class="SpellE">getthemedescription</span>(text) RETURNS text <span class="GramE">AS '</span></span></font><p
class="MsoNormal"style="mso-layout-grid-align:none;text-autospace:none"><font face="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US"><span style="mso-spacerun:yes">   </span>DECLARE </span></font><p class="MsoNormal"
style="mso-layout-grid-align:none;text-autospace:none"><fontface="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US"><span style="mso-tab-count:1">      </span><span class="SpellE"><span
class="GramE">themeid</span></span>ALIAS FOR $1;</span></font><p class="MsoNormal"
style="mso-layout-grid-align:none;text-autospace:none"><fontface="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US"><span style="mso-tab-count:1">      </span><span class="SpellE"><span
class="GramE">metaid</span></span><span class="SpellE">metadata.meta_id%TYPE</span>;</span></font><p class="MsoNormal"
style="mso-layout-grid-align:none;text-autospace:none"><fontface="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US"><span style="mso-tab-count:1">      </span><span class="SpellE"><span
class="GramE">generalid</span></span><span class="SpellE">general.general_id%TYPE</span>;</span></font><p
class="MsoNormal"style="mso-layout-grid-align:none;text-autospace:none"><font face="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US"><span style="mso-tab-count:1">      </span><span class="SpellE"><span
class="GramE">descriptionidcursor</span></span>CURSOR FOR SELECT <span class="SpellE">description_id</span> FROM <span
class="SpellE">general_description</span>WHERE <span class="SpellE">general_id</span> = <span
class="SpellE">generalid</span>;</span></font><pclass="MsoNormal"
style="mso-layout-grid-align:none;text-autospace:none"><fontface="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US"> </span></font><p class="MsoNormal"
style="mso-layout-grid-align:none;text-autospace:none"><fontface="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US"><span style="mso-spacerun:yes">   </span>BEGIN</span></font><p class="MsoNormal"
style="mso-layout-grid-align:none;text-autospace:none"><fontface="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US"><span style="mso-tab-count:1">      </span>SELECT INTO <span class="SpellE">metaid</span>
<spanclass="SpellE">meta_id</span> FROM <span class="SpellE">themehasmetadata</span> WHERE <span
class="SpellE">theme_id</span><span class="GramE">=<span style="mso-spacerun:yes">  </span><span
class="SpellE">themeid</span></span>;</span></font><pclass="MsoNormal"
style="mso-layout-grid-align:none;text-autospace:none"><fontface="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US"><span style="mso-tab-count:1">      </span>SELECT INTO <span class="SpellE">generalid</span>
<spanclass="SpellE">general_id</span> FROM <span class="SpellE">meta_general</span> WHERE <span
class="SpellE">meta_id</span>= <span class="SpellE">metaid</span>;</span></font><p class="MsoNormal"
style="mso-layout-grid-align:none;text-autospace:none"><fontface="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US"><span style="mso-tab-count:1">      </span>OPEN <span
class="SpellE">descriptionidcursor</span>;</span></font><p class="MsoNormal"
style="mso-layout-grid-align:none;text-autospace:none"><fontface="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US"> </span></font><p class="MsoNormal"
style="mso-layout-grid-align:none;text-autospace:none"><fontface="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US"><span style="mso-tab-count:1">      </span>RETURN "<span
class="SpellE">descriptionidcursor</span>"</span></font><pclass="MsoNormal"
style="mso-layout-grid-align:none;text-autospace:none"><fontface="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US">END;</span></font><p class="MsoNormal"
style="mso-layout-grid-align:none;text-autospace:none"><spanclass="GramE"><font face="Courier New" size="2"><span
style="font-size:10.0pt;
font-family:"Courier New";mso-ansi-language:EN-US">' LANGUAGE</span></font></span><font face="Courier New"
size="2"><spanstyle="font-size:10.0pt;font-family:"Courier New"; 
mso-ansi-language:EN-US"> '<span class="SpellE">plpgsql</span>';</span></font><p class="MsoNormal"
style="mso-layout-grid-align:none;text-autospace:none"><fontface="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US"> </span></font><p class="MsoNormal"
style="mso-layout-grid-align:none;text-autospace:none"><fontface="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US"> </span></font><p class="MsoNormal"
style="mso-layout-grid-align:none;text-autospace:none"><fontface="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US">I call this function in the following way: </span></font><p class="MsoNormal"
style="mso-layout-grid-align:none;text-autospace:none"><fontface="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US"> </span></font><p class="MsoNormal"
style="mso-layout-grid-align:none;text-autospace:none"><fontface="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US"> </span></font><p class="MsoNormal"
style="mso-layout-grid-align:none;text-autospace:none"><fontface="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US"><span style="mso-tab-count:1">      </span>String <span class="SpellE">themeID</span> =
"mathematics";</span></font><pclass="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><font
face="CourierNew" size="2"><span style="font-size:10.0pt;font-family:"Courier New"; 
mso-ansi-language:EN-US"><span style="mso-tab-count:1">      </span>String <span class="SpellE">queryString</span> =
"SELECT<span class="SpellE"><span class="GramE">getthemedescription</span></span><span class="GramE">(</span>" + <span
class="SpellE">themeID</span>+ ")");</span></font><p class="MsoNormal"
style="mso-layout-grid-align:none;text-autospace:none"><fontface="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US"> </span></font><p class="MsoNormal"
style="mso-layout-grid-align:none;text-autospace:none"><fontface="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US"><span style="mso-tab-count:1">      </span>Statement stmt = <span class="SpellE"><span
class="GramE">conn.createStatement</span></span><spanclass="GramE">(</span>);</span></font><p class="MsoNormal"
style="mso-layout-grid-align:none;text-autospace:none"><fontface="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US"> </span></font><p class="MsoNormal"
style="mso-layout-grid-align:none;text-autospace:none"><fontface="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US"><span style="mso-tab-count:1">      </span><span class="SpellE">ResultSet</span> <span
class="SpellE">l_cursorRSet</span>= <span class="SpellE"><span class="GramE">stmt.executeQuery</span></span><span
class="GramE">(</span><spanclass="SpellE">queryString</span>);</span></font><p class="MsoNormal"
style="mso-layout-grid-align:none;text-autospace:none"><fontface="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US"> </span></font><p class="MsoNormal"
style="mso-layout-grid-align:none;text-autospace:none"><fontface="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US"><span style="mso-tab-count:4">                        </span>.......</span></font><p
class="MsoNormal"style="mso-layout-grid-align:none;text-autospace:none"><font face="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US"> </span></font><p class="MsoNormal"
style="mso-layout-grid-align:none;text-autospace:none"><fontface="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US">If I send the <span class="SpellE">themeID</span> as above I get: ERROR: Attribute
'mathematics'not found.</span></font><p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><font
face="CourierNew" size="2"><span style="font-size:10.0pt;font-family:"Courier New"; 
mso-ansi-language:EN-US"> </span></font><p class="MsoNormal"
style="mso-layout-grid-align:none;text-autospace:none"><fontface="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US">If I send the <span class="SpellE">themeID</span> = "'mathematics'" I get:<span
style="mso-spacerun:yes"> </span><span class="SpellE">fmgr_info</span>: function</span></font><p class="MsoNormal"
style="mso-layout-grid-align:none;text-autospace:none"><fontface="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US">24907: cache lookup failed.</span></font><p class="MsoNormal"
style="mso-layout-grid-align:none;text-autospace:none"><fontface="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US"> </span></font><p class="MsoNormal"
style="mso-layout-grid-align:none;text-autospace:none"><fontface="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US">I think it has something to do with the quotes, but what?</span></font><p class="MsoNormal"
style="mso-layout-grid-align:none;text-autospace:none"><fontface="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US"> </span></font><p class="MsoNormal"
style="mso-layout-grid-align:none;text-autospace:none"><fontface="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US"> </span></font><p class="MsoNormal"
style="mso-layout-grid-align:none;text-autospace:none"><fontface="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US">Best regards</span></font><p class="MsoNormal"
style="mso-layout-grid-align:none;text-autospace:none"><fontface="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US"> </span></font><p class="MsoNormal"
style="mso-layout-grid-align:none;text-autospace:none"><fontface="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US"> </span></font><p class="MsoNormal"
style="mso-layout-grid-align:none;text-autospace:none"><fontface="Courier New" size="2"><span
style="font-size:10.0pt;font-family:"CourierNew"; 
mso-ansi-language:EN-US">Jose Luis</span></font><p class="MsoNormal"><font face="Arial" size="2"><span lang="EN-GB"
style="font-size:
10.0pt;font-family:Arial"> </span></font></div>