classdbdatabase.html

FastDb是高效的内存数据库系统

<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="dbSubSqlp55" doxytag="dbDatabase::errorHandler" ></a>
dbErrorHandler&nbsp;</td><td class="memItemRight" valign=bottom><b>errorHandler</b></td></tr>

<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="dbSubSqlp56" doxytag="dbDatabase::schemeVersion" ></a>
int&nbsp;</td><td class="memItemRight" valign=bottom><b>schemeVersion</b></td></tr>

<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="dbSubSqlp57" doxytag="dbDatabase::visitedChain" ></a>
dbVisitedObject *&nbsp;</td><td class="memItemRight" valign=bottom><b>visitedChain</b></td></tr>

<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="dbSubSqlp58" doxytag="dbDatabase::confirmDeleteColumns" ></a>
bool&nbsp;</td><td class="memItemRight" valign=bottom><b>confirmDeleteColumns</b></td></tr>

<tr><td colspan=2><br><h2>Static Protected Attributes</h2></td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="dbSubSqlt0" doxytag="dbDatabase::internalObjectSize" ></a>
size_t&nbsp;</td><td class="memItemRight" valign=bottom><b>internalObjectSize</b> []</td></tr>

<tr><td colspan=2><br><h2>Friends</h2></td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="dbDatabasen0" doxytag="dbDatabase::dbSelection" ></a>
class&nbsp;</td><td class="memItemRight" valign=bottom><b>dbSelection</b></td></tr>

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class&nbsp;</td><td class="memItemRight" valign=bottom><a class="el" href="classdbDatabase.html#dbDatabasen1">dbAnyCursor</a></td></tr>

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class&nbsp;</td><td class="memItemRight" valign=bottom><b>dbHashTable</b></td></tr>

<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="dbDatabasen3" doxytag="dbDatabase::dbQuery" ></a>
class&nbsp;</td><td class="memItemRight" valign=bottom><a class="el" href="classdbDatabase.html#dbDatabasen3">dbQuery</a></td></tr>

<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="dbDatabasen4" doxytag="dbDatabase::dbTtree" ></a>
class&nbsp;</td><td class="memItemRight" valign=bottom><b>dbTtree</b></td></tr>

<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="dbDatabasen5" doxytag="dbDatabase::dbTtreeNode" ></a>
class&nbsp;</td><td class="memItemRight" valign=bottom><b>dbTtreeNode</b></td></tr>

<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="dbDatabasen6" doxytag="dbDatabase::dbParallelQueryContext" ></a>
class&nbsp;</td><td class="memItemRight" valign=bottom><b>dbParallelQueryContext</b></td></tr>

<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="dbDatabasen7" doxytag="dbDatabase::dbServer" ></a>
class&nbsp;</td><td class="memItemRight" valign=bottom><b>dbServer</b></td></tr>

<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="dbDatabasen8" doxytag="dbDatabase::dbColumnBinding" ></a>
class&nbsp;</td><td class="memItemRight" valign=bottom><b>dbColumnBinding</b></td></tr>

<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="dbDatabasen9" doxytag="dbDatabase::dbUserFunctionArgument" ></a>
class&nbsp;</td><td class="memItemRight" valign=bottom><a class="el" href="classdbDatabase.html#dbDatabasen9">dbUserFunctionArgument</a></td></tr>

<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="dbDatabasen10" doxytag="dbDatabase::dbAnyContainer" ></a>
class&nbsp;</td><td class="memItemRight" valign=bottom><a class="el" href="classdbDatabase.html#dbDatabasen10">dbAnyContainer</a></td></tr>

<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="dbDatabasen11" doxytag="dbDatabase::dbFile" ></a>
class&nbsp;</td><td class="memItemRight" valign=bottom><b>dbFile</b></td></tr>

<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="dbDatabasen12" doxytag="dbDatabase::dbCLI" ></a>
class&nbsp;</td><td class="memItemRight" valign=bottom><b>dbCLI</b></td></tr>

<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="dbDatabasen13" doxytag="dbDatabase::GiSTdb" ></a>
class&nbsp;</td><td class="memItemRight" valign=bottom><b>GiSTdb</b></td></tr>

<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="dbDatabasen14" doxytag="dbDatabase::dbHArray" ></a>
class&nbsp;</td><td class="memItemRight" valign=bottom><b>dbHArray</b></td></tr>

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<hr><a name="_details"></a><h2>Detailed Description</h2>
Database class 
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<hr><h2>Member Enumeration Documentation</h2>
<a class="anchor" name="dbSubSqlx3" doxytag="dbDatabase::dbLockType" ></a><p>
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          <td class="md" nowrap valign="top"> enum <a class="el" href="classdbDatabase.html#dbSubSqlx3">dbDatabase::dbLockType</a><code> [protected]</code>
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Start database transaction <dl compact><dt><b>Parameters:</b></dt><dd>
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    <tr><td valign=top><em>modify</em>&nbsp;</td><td>if it is update or read-only rtansaction </td></tr>
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<dl compact><dt><b>Returns:</b></dt><dd>true if version of memory mapping object is not obsolete and reallocation is not possible </dd></dl>
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<hr><h2>Constructor &amp; Destructor Documentation</h2>
<a class="anchor" name="dbDatabasea28" doxytag="dbDatabase::dbDatabase" ></a><p>
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          <td class="md" nowrap valign="top"> dbDatabase::dbDatabase </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">dbAccessType&nbsp;</td>
          <td class="mdname" nowrap> <em>type</em> = dbAllAccess, </td>
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          <td class="md" nowrap>size_t&nbsp;</td>
          <td class="mdname" nowrap> <em>dbInitSize</em> = dbDefaultInitDatabaseSize, </td>
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          <td class="md" nowrap>size_t&nbsp;</td>
          <td class="mdname" nowrap> <em>dbExtensionQuantum</em> = dbDefaultExtensionQuantum, </td>
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          <td class="md" nowrap>size_t&nbsp;</td>
          <td class="mdname" nowrap> <em>dbInitIndexSize</em> = dbDefaultInitIndexSize, </td>
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          <td class="md" nowrap>int&nbsp;</td>
          <td class="mdname" nowrap> <em>nThreads</em> = 1</td>
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          <td class="md">)&nbsp;</td>
          <td class="md" colspan="2"></td>
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Database constructor <dl compact><dt><b>Parameters:</b></dt><dd>
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    <tr><td valign=top><em>type</em>&nbsp;</td><td>access type: <code>dbDatabase::dbReadOnly</code> or <code>dbDatabase::dbAllAcces</code> </td></tr>
    <tr><td valign=top><em>dbInitSize</em>&nbsp;</td><td>initial size of the database. If FastDB is compiled with DISKLESS_CONFIGURATION option, then in this parameter <b>MAXIMAL</b> size of the database should be specified (in this mode database can not be reallocated) </td></tr>
    <tr><td valign=top><em>dbExtensionQuantum</em>&nbsp;</td><td>quentum for extending memory allocation bitmap </td></tr>
    <tr><td valign=top><em>dbInitIndexSize</em>&nbsp;</td><td>initial index size (objects) </td></tr>
    <tr><td valign=top><em>nThreads</em>&nbsp;</td><td>concurrency level for sequential search and sort operations </td></tr>
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<dl compact><dt><b>See also:</b></dt><dd><a class="el" href="classdbDatabase.html#dbSubSqla17">setConcurrency(unsigned nThreads)</a> </dd></dl>
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<a class="anchor" name="dbDatabasea29" doxytag="dbDatabase::~dbDatabase" ></a><p>
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          <td class="md" nowrap valign="top"> virtual dbDatabase::~<a class="el" href="classdbDatabase.html">dbDatabase</a> </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="mdname1" valign="top" nowrap>          </td>
          <td class="md" valign="top">&nbsp;)&nbsp;</td>
          <td class="md" nowrap><code> [virtual]</code></td>
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Database detructor     </td>
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<hr><h2>Member Function Documentation</h2>
<a class="anchor" name="dbSubSqlb39" doxytag="dbDatabase::addIndices" ></a><p>
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          <td class="md" nowrap valign="top"> bool dbDatabase::addIndices </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">bool&nbsp;</td>
          <td class="mdname" nowrap> <em>alter</em>, </td>
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          <td class="md" nowrap><a class="el" href="classdbTableDescriptor.html">dbTableDescriptor</a> *&nbsp;</td>
          <td class="mdname" nowrap> <em>desc</em></td>
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          <td class="md">)&nbsp;</td>
          <td class="md" colspan="2"><code> [protected]</code></td>
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