classdbanycursor.html

FastDb是高效的内存数据库系统

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<p>
Position cursor on the record with the specified OID <dl compact><dt><b>Parameters:</b></dt><dd>
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    <tr><td valign=top><em>oid</em>&nbsp;</td><td>object identifier of record </td></tr>
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<dl compact><dt><b>Returns:</b></dt><dd>poistion of the record in the selection or -1 if record with such OID is not in selection </dd></dl>
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<a class="anchor" name="dbCursor_3_01Sequencer_01_4a26" doxytag="dbAnyCursor::select" ></a><p>
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          <td class="md" nowrap valign="top"> int dbAnyCursor::select </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> [inline]</code></td>
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<p>
Select all records from the table with default cursor type <dl compact><dt><b>Returns:</b></dt><dd>number of selected records </dd></dl>
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<a class="anchor" name="dbCursor_3_01Sequencer_01_4a25" doxytag="dbAnyCursor::select" ></a><p>
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          <td class="md" nowrap valign="top"> int dbAnyCursor::select </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">dbCursorType&nbsp;</td>
          <td class="mdname1" valign="top" nowrap> <em>aType</em>          </td>
          <td class="md" valign="top">&nbsp;)&nbsp;</td>
          <td class="md" nowrap><code> [inline]</code></td>
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<p>
Select all records from the table <dl compact><dt><b>Parameters:</b></dt><dd>
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    <tr><td valign=top><em>aType</em>&nbsp;</td><td>cursor type: <code>dbCursorForUpdate, dbCursorViewOnly</code> </td></tr>
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<dl compact><dt><b>Returns:</b></dt><dd>number of selected records </dd></dl>
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<a class="anchor" name="dbCursor_3_01Sequencer_01_4a24" doxytag="dbAnyCursor::select" ></a><p>
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          <td class="md" nowrap valign="top"> int dbAnyCursor::select </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">char const *&nbsp;</td>
          <td class="mdname" nowrap> <em>condition</em>, </td>
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          <td></td>
          <td></td>
          <td class="md" nowrap>void *&nbsp;</td>
          <td class="mdname" nowrap> <em>paramStruct</em> = NULL</td>
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          <td></td>
          <td class="md">)&nbsp;</td>
          <td class="md" colspan="2"><code> [inline]</code></td>
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Execute query with default cursor type. <dl compact><dt><b>Parameters:</b></dt><dd>
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    <tr><td valign=top><em>condition</em>&nbsp;</td><td>selection criteria </td></tr>
    <tr><td valign=top><em>paramStruct</em>&nbsp;</td><td>pointer to structure with parameters. </td></tr>
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<dl compact><dt><b>Returns:</b></dt><dd>number of selected records </dd></dl>
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<a class="anchor" name="dbCursor_3_01Sequencer_01_4a23" doxytag="dbAnyCursor::select" ></a><p>
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          <td class="md" nowrap valign="top"> int dbAnyCursor::select </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">char const *&nbsp;</td>
          <td class="mdname" nowrap> <em>condition</em>, </td>
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          <td></td>
          <td></td>
          <td class="md" nowrap>dbCursorType&nbsp;</td>
          <td class="mdname" nowrap> <em>aType</em>, </td>
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          <td></td>
          <td></td>
          <td class="md" nowrap>void *&nbsp;</td>
          <td class="mdname" nowrap> <em>paramStruct</em> = NULL</td>
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          <td></td>
          <td class="md">)&nbsp;</td>
          <td class="md" colspan="2"><code> [inline]</code></td>
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Execute query. <dl compact><dt><b>Parameters:</b></dt><dd>
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    <tr><td valign=top><em>condition</em>&nbsp;</td><td>selection criteria </td></tr>
    <tr><td valign=top><em>aType</em>&nbsp;</td><td>cursor type: <code>dbCursorForUpdate, dbCursorViewOnly</code> </td></tr>
    <tr><td valign=top><em>paramStruct</em>&nbsp;</td><td>pointer to structure with parameters. </td></tr>
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<dl compact><dt><b>Returns:</b></dt><dd>number of selected records </dd></dl>
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<a class="anchor" name="dbCursor_3_01Sequencer_01_4a22" doxytag="dbAnyCursor::select" ></a><p>
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          <td class="md" nowrap valign="top"> int dbAnyCursor::select </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top"><a class="el" href="classdbQuery.html">dbQuery</a> &amp;&nbsp;</td>
          <td class="mdname" nowrap> <em>query</em>, </td>
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          <td></td>
          <td></td>
          <td class="md" nowrap>void *&nbsp;</td>
          <td class="mdname" nowrap> <em>paramStruct</em> = NULL</td>
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          <td></td>
          <td class="md">)&nbsp;</td>
          <td class="md" colspan="2"><code> [inline]</code></td>
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<p>
Execute query with default cursor type. <dl compact><dt><b>Parameters:</b></dt><dd>
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    <tr><td valign=top><em>query</em>&nbsp;</td><td>selection criteria </td></tr>
    <tr><td valign=top><em>paramStruct</em>&nbsp;</td><td>pointer to structure with parameters. </td></tr>
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<dl compact><dt><b>Returns:</b></dt><dd>number of selected records </dd></dl>
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<a class="anchor" name="dbCursor_3_01Sequencer_01_4a21" doxytag="dbAnyCursor::select" ></a><p>
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          <td class="md" nowrap valign="top"> int dbAnyCursor::select </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top"><a class="el" href="classdbQuery.html">dbQuery</a> &amp;&nbsp;</td>
          <td class="mdname" nowrap> <em>query</em>, </td>
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          <td></td>
          <td></td>
          <td class="md" nowrap>dbCursorType&nbsp;</td>
          <td class="mdname" nowrap> <em>aType</em>, </td>
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          <td></td>
          <td></td>
          <td class="md" nowrap>void *&nbsp;</td>
          <td class="mdname" nowrap> <em>paramStruct</em> = NULL</td>
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          <td></td>
          <td class="md">)&nbsp;</td>
          <td class="md" colspan="2"><code> [inline]</code></td>
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<p>
Execute query. <dl compact><dt><b>Parameters:</b></dt><dd>
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    <tr><td valign=top><em>query</em>&nbsp;</td><td>selection criteria </td></tr>
    <tr><td valign=top><em>aType</em>&nbsp;</td><td>cursor type: <code>dbCursorForUpdate, dbCursorViewOnly</code> </td></tr>
    <tr><td valign=top><em>paramStruct</em>&nbsp;</td><td>pointer to structure with parameters. If you want to create reentrant precompiled query, i.e. query which can be used concurrently by different threadsm you should avoid to use static variables in such query, and instead of it place paramters into some structure, specify in query relative offsets to the parameters, fill local structure and pass pointer to it to select method. </td></tr>
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<dl compact><dt><b>Returns:</b></dt><dd>number of selected records </dd></dl>
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<a class="anchor" name="dbCursor_3_01Sequencer_01_4a27" doxytag="dbAnyCursor::selectByKey" ></a><p>
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          <td class="md" nowrap valign="top"> int dbAnyCursor::selectByKey </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">char const *&nbsp;</td>
          <td class="mdname" nowrap> <em>key</em>, </td>
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          <td></td>
          <td></td>
          <td class="md" nowrap>void const *&nbsp;</td>
          <td class="mdname" nowrap> <em>value</em></td>
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          <td></td>
          <td class="md">)&nbsp;</td>
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<p>
Select all records from the table with specfied value of the key <dl compact><dt><b>Parameters:</b></dt><dd>
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    <tr><td valign=top><em>key</em>&nbsp;</td><td>name of the key field </td></tr>
    <tr><td valign=top><em>value</em>&nbsp;</td><td>searched value of the key </td></tr>
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<dl compact><dt><b>Returns:</b></dt><dd>number of selected records </dd></dl>
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<a class="anchor" name="dbCursor_3_01Sequencer_01_4a28" doxytag="dbAnyCursor::selectByKeyRange" ></a><p>
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          <td class="md" nowrap valign="top"> int dbAnyCursor::selectByKeyRange </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">char const *&nbsp;</td>
          <td class="mdname" nowrap> <em>key</em>, </td>
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