query_8h-source.html

俄罗斯牛人KK的作品,著名的ORDBMS,这里上传最新的3.39版本源代码.希望了解对象关系数据库的同好,请不要错过.

00227         last = &amp;(*last)-&gt;<a class="code" href="classdbQueryElement.html#dbQueryElemento0">next</a>;
00228         operand = <span class="keyword">false</span>;
00229         <span class="keywordflow">return</span> *<span class="keyword">this</span>;
00230     }
00231     dbQueryExpression&amp; operator,(dbComponent <span class="keyword">const</span>&amp; comp) { 
00232         add(dbQueryElement::qExpression, comp.<a class="code" href="classdbComponent.html#dbComponentm0">structure</a>);
00233         <span class="keywordflow">if</span> (comp.<a class="code" href="classdbComponent.html#dbComponentm1">field</a> != NULL) { 
00234             add(dbQueryElement::qExpression, <span class="stringliteral">"."</span>);
00235             add(dbQueryElement::qExpression, comp.<a class="code" href="classdbComponent.html#dbComponentm1">field</a>);
00236         }
00237         operand = <span class="keyword">false</span>;
00238         <span class="keywordflow">return</span> *<span class="keyword">this</span>;
00239     }
00240     dbQueryExpression&amp; operator += (dbComponent <span class="keyword">const</span>&amp; comp) { 
00241         <span class="keywordflow">return</span> *<span class="keyword">this</span>,comp;
00242     }
00243     dbQueryExpression&amp; operator += (<span class="keywordtype">char</span> <span class="keyword">const</span>* ptr) { 
00244         <span class="keywordflow">return</span> add(dbQueryElement::qExpression, ptr);
00245     }
00246 <span class="preprocessor">#ifndef NO_MEMBER_TEMPLATES</span>
00247 <span class="preprocessor"></span>    <span class="keyword">template</span>&lt;<span class="keyword">class</span> T&gt;
00248     dbQueryExpression&amp; operator,(<a class="code" href="classdbReference.html">dbReference&lt;T&gt;</a> <span class="keyword">const</span>&amp; value) { 
00249         <span class="keywordflow">return</span> add(dbQueryElement::qVarReference, &amp;value, &amp;T::dbDescriptor);
00250     }
00251 
00252     <span class="keyword">template</span>&lt;<span class="keyword">class</span> T&gt;
00253     <span class="keyword">inline</span> dbQueryExpression&amp; operator,(<a class="code" href="classdbArray.html">dbArray</a>&lt; <a class="code" href="classdbReference.html">dbReference&lt;T&gt;</a> &gt; <span class="keyword">const</span>&amp; value) { 
00254         <span class="keywordflow">return</span> add(dbQueryElement::qVarArrayOfRef, &amp;value, &amp;T::dbDescriptor);
00255     }
00256 
00257     <span class="keyword">template</span>&lt;<span class="keyword">class</span> T&gt;
00258     <span class="keyword">inline</span> dbQueryExpression&amp; operator,(<a class="code" href="classdbArray.html">dbArray</a>&lt; <a class="code" href="classdbReference.html">dbReference&lt;T&gt;</a> &gt;<span class="keyword">const</span>* <span class="keyword">const</span>&amp; value) { 
00259         <span class="keywordflow">return</span> add(dbQueryElement::qVarArrayOfRefPtr, &amp;value, &amp;T::dbDescriptor);
00260     }
00261 <span class="preprocessor">#endif</span>
00262 <span class="preprocessor"></span><span class="preprocessor">#if !defined(_MSC_VER) || _MSC_VER+0 &gt;= 1300</span>
00263 <span class="preprocessor"></span>    <span class="keyword">inline</span> dbQueryExpression&amp; operator,(<a class="code" href="classdbArray.html">dbArray&lt;db_int4&gt;</a> <span class="keyword">const</span>&amp; value) { 
00264         <span class="keywordflow">return</span> add(dbQueryElement::qVarArrayOfInt4, &amp;value);
00265     }
00266 
00267     <span class="keyword">inline</span> dbQueryExpression&amp; operator,(<a class="code" href="classdbArray.html">dbArray&lt;db_int4&gt;</a><span class="keyword">const</span>* <span class="keyword">const</span>&amp; value) { 
00268         <span class="keywordflow">return</span> add(dbQueryElement::qVarArrayOfInt4Ptr, &amp;value);
00269     }
00270 
00271     <span class="keyword">inline</span> dbQueryExpression&amp; operator,(<a class="code" href="classdbArray.html">dbArray&lt;db_int8&gt;</a> <span class="keyword">const</span>&amp; value) { 
00272         <span class="keywordflow">return</span> add(dbQueryElement::qVarArrayOfInt8, &amp;value);
00273     }
00274 
00275     <span class="keyword">inline</span> dbQueryExpression&amp; operator,(<a class="code" href="classdbArray.html">dbArray&lt;db_int8&gt;</a><span class="keyword">const</span>* <span class="keyword">const</span>&amp; value) { 
00276         <span class="keywordflow">return</span> add(dbQueryElement::qVarArrayOfInt8Ptr, &amp;value);
00277     }
00278 <span class="preprocessor">#endif</span>
00279 <span class="preprocessor"></span>};
00280 
00281 <span class="keyword">class </span>dbOrderByNode;
00282 <span class="keyword">class </span>dbFollowByNode;
00283 
00284 
<a name="l00288"></a><a class="code" href="classdbCompiledQuery.html">00288</a> <span class="keyword">class </span>FASTDB_DLL_ENTRY dbCompiledQuery { 
00289   <span class="keyword">public</span>:
00290     dbExprNode*        tree;
00291     dbOrderByNode*     order;
00292     dbFollowByNode*    follow;
00293     <a class="code" href="classdbTableDescriptor.html">dbTableDescriptor</a>* table;
00294     <span class="keywordtype">int</span>                schemeVersion;
00295 
00296     size_t             stmtLimitStart;
00297     size_t             stmtLimitLen;
00298     int4*              stmtLimitStartPtr;
00299     int4*              stmtLimitLenPtr;
00300     <span class="keywordtype">bool</span>               limitSpecified;
00301 
00302     <span class="keyword">enum</span> IteratorInit { 
00303         StartFromAny,
00304         StartFromFirst,
00305         StartFromLast,
00306         StartFromRef, 
00307         StartFromArray,
00308         StartFromArrayPtr
00309     };
00310     IteratorInit       startFrom;
00311     <span class="keywordtype">void</span> <span class="keyword">const</span>*        root;
00312 
00313     <span class="keywordtype">void</span> destroy();
00314 
00315     <span class="keywordtype">bool</span> compiled() { <span class="keywordflow">return</span> tree != NULL; }
00316 
00317     dbCompiledQuery() { 
00318         tree = NULL;
00319         order = NULL;
00320         follow = NULL;
00321         table = NULL;
00322         startFrom = StartFromAny;
00323         limitSpecified = <span class="keyword">false</span>;
00324     }
00325 };
00326 
<a name="l00331"></a><a class="code" href="classdbQuery.html">00331</a> <span class="keyword">class </span>FASTDB_DLL_ENTRY dbQuery : <span class="keyword">public</span> dbCompiledQuery { 
00332     <span class="keyword">friend</span> <span class="keyword">class </span>dbCompiler;
00333     <span class="keyword">friend</span> <span class="keyword">class </span><a class="code" href="classdbDatabase.html">dbDatabase</a>;
00334     <span class="keyword">friend</span> <span class="keyword">class </span>dbSubSql;
00335     <span class="keyword">friend</span> <span class="keyword">class </span>dbCLI;
00336   <span class="keyword">private</span>:
00337     dbMutex            mutex;
00338     <a class="code" href="classdbQueryElement.html">dbQueryElement</a>*    elements;
00339     <a class="code" href="classdbQueryElement.html">dbQueryElement</a>**   nextElement;
00340     <span class="keywordtype">bool</span>               operand;
00341     <span class="keywordtype">bool</span>               mutexLocked;
00342 
00343     <span class="comment">//</span>
00344     <span class="comment">// Prohibite query copying</span>
00345     <span class="comment">//</span>
00346     dbQuery(dbQuery <span class="keyword">const</span>&amp;) : dbCompiledQuery() {} 
00347     dbQuery&amp; operator =(dbQuery <span class="keyword">const</span>&amp;) { <span class="keywordflow">return</span> *<span class="keyword">this</span>; }
00348 
00349   <span class="keyword">public</span>:
00350     <span class="keywordtype">int</span>                pos; <span class="comment">// position of condition in statement</span>
00351 
00352 
00353     <span class="keywordtype">char</span>* dump(<span class="keywordtype">char</span>* buf) { 
00354         <span class="keywordtype">char</span>* p = buf;
00355         <span class="keywordflow">for</span> (<a class="code" href="classdbQueryElement.html">dbQueryElement</a>* elem = elements; elem != NULL; elem = elem-&gt;<a class="code" href="classdbQueryElement.html#dbQueryElemento0">next</a>) { 
00356             p = elem-&gt;<a class="code" href="classdbQueryElement.html#dbQueryElementa4">dump</a>(p);
00357         }
00358         <span class="keywordflow">return</span> buf;
00359     }
00360 
00361     <span class="keywordtype">char</span>* dumpValues(<span class="keywordtype">char</span>* buf) { 
00362         <span class="keywordtype">char</span>* p = buf;
00363         <span class="keywordflow">for</span> (<a class="code" href="classdbQueryElement.html">dbQueryElement</a>* elem = elements; elem != NULL; elem = elem-&gt;<a class="code" href="classdbQueryElement.html#dbQueryElemento0">next</a>) { 
00364             p = elem-&gt;<a class="code" href="classdbQueryElement.html#dbQueryElementa5">dumpValues</a>(p);
00365         }
00366         <span class="keywordflow">return</span> buf;
00367     }
00368 
00369     dbQuery&amp; append(dbQueryElement::ElementType type, <span class="keywordtype">void</span> <span class="keyword">const</span>* ptr,
00370                     <a class="code" href="classdbTableDescriptor.html">dbTableDescriptor</a>* table = NULL) 
00371     { 
00372         nextElement = &amp;(*nextElement=<span class="keyword">new</span> <a class="code" href="classdbQueryElement.html">dbQueryElement</a>(type,ptr,table))-&gt;<a class="code" href="classdbQueryElement.html#dbQueryElemento0">next</a>;
00373         operand = (type == dbQueryElement::qExpression);
00374         <span class="keywordflow">return</span> *<span class="keyword">this</span>;
00375     }
00376 
00377     dbQuery&amp; reset();
00378 
00379     <span class="comment">//</span>
00380     <span class="comment">// Redefined operator = and , make it possible to specify query in the</span>
00381     <span class="comment">// following way:</span>
00382     <span class="comment">//         int x, y;</span>
00383     <span class="comment">//         dbDataTime dt;</span>
00384     <span class="comment">//         dbQuery q; </span>
00385     <span class="comment">//         dbCursor&lt;record&gt; cursor;</span>
00386     <span class="comment">//         q = "x=",x,"and y=",y,"and",dt == "date";</span>
00387     <span class="comment">//         for (x = 0; x &lt; max_x; x++) { </span>
00388     <span class="comment">//             for (y = 0; y &lt; max_y; y++) { </span>
00389     <span class="comment">//                 cursor.select(q);</span>
00390     <span class="comment">//                 ...</span>
00391     <span class="comment">//             }</span>
00392     <span class="comment">//         }</span>
00393 
00394     dbQuery&amp; add(dbQueryExpression <span class="keyword">const</span>&amp; expr); 
00395 
00396     dbQuery&amp; And(<span class="keywordtype">char</span> <span class="keyword">const</span>* str) { 
00397         <span class="keywordflow">if</span> (elements != NULL) { 
00398             append(dbQueryElement::qExpression, <span class="stringliteral">"and"</span>);
00399         }
00400         <span class="keywordflow">return</span> append(dbQueryElement::qExpression, str);
00401     }
00402 
00403     dbQuery&amp; Or(<span class="keywordtype">char</span> <span class="keyword">const</span>* str) { 
00404         <span class="keywordflow">if</span> (elements != NULL) { 
00405             append(dbQueryElement::qExpression, <span class="stringliteral">"or"</span>);
00406         }
00407         <span class="keywordflow">return</span> append(dbQueryElement::qExpression, str);
00408     }
00409 
00410     dbQuery&amp; add(<span class="keywordtype">char</span> <span class="keyword">const</span>* str) { 
00411         <span class="keywordflow">return</span> append(operand ? dbQueryElement::qVarString 
00412                       : dbQueryElement::qExpression, str);
00413     }
00414     dbQuery&amp; add(<span class="keywordtype">char</span> <span class="keyword">const</span>** str) { 
00415         <span class="keywordflow">return</span> append(dbQueryElement::qVarStringPtr, str);
00416     }
00417     dbQuery&amp; add(<a class="code" href="classrectangle.html">rectangle</a> <span class="keyword">const</span>&amp; rect) {
00418         <span class="keywordflow">return</span> append(dbQueryElement::qVarRectangle, &amp;rect);
00419     }
00420 <span class="preprocessor">#ifdef USE_STD_STRING</span>
00421 <span class="preprocessor"></span>    dbQuery&amp; add(std::string <span class="keyword">const</span>&amp; str) { 
00422         <span class="keywordflow">return</span> append(dbQueryElement::qVarStdString, &amp;str);
00423     }
00424     dbQuery&amp; operator,(std::string <span class="keyword">const</span>&amp; str) { <span class="keywordflow">return</span> add(str); }
00425 <span class="preprocessor">#endif</span>
00426 <span class="preprocessor"></span>    dbQuery&amp; add(<span class="keywordtype">char</span>** str) { 
00427         <span class="keywordflow">return</span> append(dbQueryElement::qVarStringPtr, str);
00428     }
00429     dbQuery&amp; add(int1 <span class="keyword">const</span>&amp; value) { 
00430         <span class="keywordflow">return</span> append(dbQueryElement::qVarInt1, &amp;value);
00431     }
00432     dbQuery&amp; add (int2 <span class="keyword">const</span>&amp; value) { 
00433         <span class="keywordflow">return</span> append(dbQueryElement::qVarInt2, &amp;value);
00434     }