function.db2-statistics.html
来自「php的帮助文档,涉及到PHP的案例和基本语法,以及实际应用内容」· HTML 代码 · 共 379 行
HTML
379 行
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <title>Returns a result set listing the index and statistics for a table</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.db2-special-columns.html">db2_special_columns</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.db2-stmt-error.html">db2_stmt_error</a></div> <div class="up"><a href="ref.ibm-db2.html">IBM DB2 Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.db2-statistics" class="refentry"> <div class="refnamediv"> <h1 class="refname">db2_statistics</h1> <p class="verinfo">(PECL ibm_db2:1.0-1.6.2)</p><p class="refpurpose"><span class="refname">db2_statistics</span> — <span class="dc-title"> Returns a result set listing the index and statistics for a table </span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">resource</span> <span class="methodname"><b><b>db2_statistics</b></b></span> ( <span class="methodparam"><span class="type">resource</span> <tt class="parameter">$connection</tt></span> , <span class="methodparam"><span class="type">string</span> <tt class="parameter">$qualifier</tt></span> , <span class="methodparam"><span class="type">string</span> <tt class="parameter">$schema</tt></span> , <span class="methodparam"><span class="type">string</span> <tt class="parameter">$table-name</tt></span> , <span class="methodparam"><span class="type">bool</span> <tt class="parameter">$unique</tt></span> )</div> <p class="para rdfs-comment"> Returns a result set listing the index and statistics for a table. </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">connection</tt></i></span> <dd> <p class="para"> A valid connection to an IBM DB2, Cloudscape, or Apache Derby database. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">qualifier</tt></i></span> <dd> <p class="para"> A qualifier for DB2 databases running on OS/390 or z/OS servers. For other databases, pass <b><tt>NULL</tt></b> or an empty string. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">schema</tt></i></span> <dd> <p class="para"> The schema that contains the targeted table. If this parameter is <b><tt>NULL</tt></b>, the statistics and indexes are returned for the schema of the current user. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">table_name</tt></i></span> <dd> <p class="para"> The name of the table. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">unique</tt></i></span> <dd> <p class="para"> An integer value representing the type of index information to return. <dl> <dt> <br /><span class="term"><i><tt class="parameter">0</tt></i></span> <dd> <p class="para"> Return only the information for unique indexes on the table. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">1</tt></i></span> <dd> <p class="para"> Return the information for all indexes on the table. </p> </dd> </dt> </dl> </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns a statement resource with a result set containing rows describing the statistics and indexes for the base tables matching the specified parameters. The rows are composed of the following columns: <table class="informaltable"> <colgroup> <thead valign="middle"> <tr valign="middle"> <th colspan="1">Column name</th> <th colspan="1">Description</th> </tr> </thead> <tbody valign="middle" class="tbody"> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">TABLE_CAT</td> <td colspan="1" rowspan="1" align="left">The catalog that contains the table. The value is <b><tt>NULL</tt></b> if this table does not have catalogs.</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">TABLE_SCHEM</td> <td colspan="1" rowspan="1" align="left">Name of the schema that contains the table.</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">TABLE_NAME</td> <td colspan="1" rowspan="1" align="left">Name of the table.</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">NON_UNIQUE</td> <td colspan="1" rowspan="1" align="left"> <p class="para"> An integer value representing whether the index prohibits unique values, or whether the row represents statistics on the table itself: <table class="informaltable"> <colgroup> <thead valign="middle"> <tr valign="middle"> <th colspan="1">Return value</th> <th colspan="1">Parameter type</th> </tr> </thead> <tbody valign="middle" class="tbody"> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">0 (SQL_FALSE)</td> <td colspan="1" rowspan="1" align="left">The index allows duplicate values.</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">1 (SQL_TRUE)</td> <td colspan="1" rowspan="1" align="left">The index values must be unique.</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left"><b><tt>NULL</tt></b></td> <td colspan="1" rowspan="1" align="left">This row is statistics information for the table itself.</td> </tr> </tbody> </colgroup> </table> </p> </td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">INDEX_QUALIFIER</td> <td colspan="1" rowspan="1" align="left">A string value representing the qualifier that would have to be prepended to INDEX_NAME to fully qualify the index.</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">INDEX_NAME</td> <td colspan="1" rowspan="1" align="left">A string representing the name of the index.</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">TYPE</td> <td colspan="1" rowspan="1" align="left"> <p class="para"> An integer value representing the type of information contained in this row of the result set: <table class="informaltable"> <colgroup> <thead valign="middle"> <tr valign="middle"> <th colspan="1">Return value</th> <th colspan="1">Parameter type</th> </tr> </thead> <tbody valign="middle" class="tbody"> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">0 (SQL_TABLE_STAT)</td> <td colspan="1" rowspan="1" align="left">The row contains statistics about the table itself.</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">1 (SQL_INDEX_CLUSTERED)</td> <td colspan="1" rowspan="1" align="left">The row contains information about a clustered index.</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">2 (SQL_INDEX_HASH)</td> <td colspan="1" rowspan="1" align="left">The row contains information about a hashed index.</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">3 (SQL_INDEX_OTHER)</td> <td colspan="1" rowspan="1" align="left">The row contains information about a type of index that is neither clustered nor hashed.</td> </tr> </tbody> </colgroup> </table> </p> </td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">ORDINAL_POSITION</td> <td colspan="1" rowspan="1" align="left">The 1-indexed position of the column in the index. <b><tt>NULL</tt></b> if the row contains statistics information about the table itself.</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">COLUMN_NAME</td> <td colspan="1" rowspan="1" align="left">The name of the column in the index. <b><tt>NULL</tt></b> if the row contains statistics information about the table itself.</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">ASC_OR_DESC</td> <td colspan="1" rowspan="1" align="left"> <i>A</i> if the column is sorted in ascending order, <i>D</i> if the column is sorted in descending order, <b><tt>NULL</tt></b> if the row contains statistics information about the table itself. </td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">CARDINALITY</td> <td colspan="1" rowspan="1" align="left"> <p class="para"> If the row contains information about an index, this column contains an integer value representing the number of unique values in the index. </p> <p class="para"> If the row contains information about the table itself, this column contains an integer value representing the number of rows in the table. </p> </td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">PAGES</td> <td colspan="1" rowspan="1" align="left"> <p class="para"> If the row contains information about an index, this column contains an integer value representing the number of pages used to store the index. </p> <p class="para"> If the row contains information about the table itself, this column contains an integer value representing the number of pages used to store the table. </p> </td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">FILTER_CONDITION</td> <td colspan="1" rowspan="1" align="left">Always returns <b><tt>NULL</tt></b>.</td> </tr> </tbody> </colgroup> </table> </p> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><a href="function.db2-column-privileges.html" class="function" rel="rdfs-seeAlso">db2_column_privileges()</a></li> <li class="member"><a href="function.db2-columns.html" class="function" rel="rdfs-seeAlso">db2_columns()</a></li> <li class="member"><a href="function.db2-foreign-keys.html" class="function" rel="rdfs-seeAlso">db2_foreign_keys()</a></li> <li class="member"><a href="function.db2-primary-keys.html" class="function" rel="rdfs-seeAlso">db2_primary_keys()</a></li> <li class="member"><a href="function.db2-procedure-columns.html" class="function" rel="rdfs-seeAlso">db2_procedure_columns()</a></li> <li class="member"><a href="function.db2-procedures.html" class="function" rel="rdfs-seeAlso">db2_procedures()</a></li> <li class="member"><a href="function.db2-special-columns.html" class="function" rel="rdfs-seeAlso">db2_special_columns()</a></li> <li class="member"><a href="function.db2-table-privileges.html" class="function" rel="rdfs-seeAlso">db2_table_privileges()</a></li> <li class="member"><a href="function.db2-tables.html" class="function" rel="rdfs-seeAlso">db2_tables()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.db2-special-columns.html">db2_special_columns</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.db2-stmt-error.html">db2_stmt_error</a></div> <div class="up"><a href="ref.ibm-db2.html">IBM DB2 Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>⌨️ 快捷键说明
复制代码Ctrl + C
搜索代码Ctrl + F
全屏模式F11
增大字号Ctrl + =
减小字号Ctrl + -
显示快捷键?