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<?xml version="1.0" encoding="UTF-8"?>
<!-- $Revision: 317663 $ -->
<section xml:id="pdo-cubrid.constants" xmlns="http://docbook.org/ns/docbook">
&reftitle.constants;
&pdo.driver-constants;
<para>
The following constants can be used when setting the database attribute.
They can be passed to <function>PDO::getAttribute</function> or
<function>PDO::setAttribute</function>.
<table>
<title>PDO::CUBRID attribute flags</title>
<tgroup cols="2">
<thead>
<row>
<entry>Constant</entry>
<entry>Description</entry>
</row>
</thead>
<tbody>
<row>
<entry>PDO::CUBRID_ATTR_ISOLATION_LEVEL</entry>
<entry>Transaction isolation level for the database connection.</entry>
</row>
<row>
<entry>PDO::CUBRID_ATTR_LOCK_TIMEOUT</entry>
<entry>Transaction timeout in seconds.</entry>
</row>
<row>
<entry>PDO::CUBRID_ATTR_MAX_STRING_LENGTH</entry>
<entry>Read only. The maximum string length for bit, varbit, char,
varchar, nchar, nchar varying data types when using CUBRID PDO
API.</entry>
</row>
</tbody>
</tgroup>
</table>
</para>
<para>
The following constants can be used when setting the transaction isolation
level. They can be passed to <function>PDO::getAttribute</function> or
returned by <function>PDO::setAttribute</function>.
<table>
<title>PDO::CUBRID isolation level flags</title>
<tgroup cols="2">
<thead>
<row>
<entry>Constant</entry>
<entry>Description</entry>
</row>
</thead>
<tbody>
<row>
<entry>PDO::TRAN_COMMIT_CLASS_UNCOMMIT_INSTANCE</entry>
<entry>The lowest isolation level (1). A dirty, non-repeatable or
phantom read may occur for the tuple and a non-repeatable read may
occur for the table as well.</entry>
</row>
<row>
<entry>PDO::TRAN_COMMIT_CLASS_COMMIT_INSTANCE</entry>
<entry>A relatively low isolation level (2). A dirty read does not
occur, but non-repeatable or phantom read may occur.</entry>
</row>
<row>
<entry>PDO::TRAN_REP_CLASS_UNCOMMIT_INSTANCE</entry>
<entry>The default isolation of CUBRID (3). A dirty, non-repeatable or
phantom read may occur for the tuple, but repeatable read is ensured
for the table.</entry>
</row>
<row>
<entry>PDO::TRAN_REP_CLASS_COMMIT_INSTANCE</entry>
<entry>A relatively low isolation level (4). A dirty read does not
occur, but non-repeatable or phantom read may.</entry>
</row>
<row>
<entry>PDO::TRAN_REP_CLASS_REP_INSTANCE</entry>
<entry>A relatively high isolation level (5). A dirty or non-repeatable
read does not occur, but a phantom read may.</entry>
</row>
<row>
<entry>PDO::TRAN_SERIALIZABLE</entry>
<entry>The highest isolation level (6). Problems concerning concurrency
(e.g. dirty read, non-repeatable read, phantom read, etc.) do not
occur.</entry>
</row>
</tbody>
</tgroup>
</table>
</para>
<para>
The following constants can be used when getting schema information. They
can be passed to <function>PDO::cubrid_schema</function>.
<table>
<title>PDO::CUBRID schema flags</title>
<tgroup cols="2">
<thead>
<row>
<entry>Constant</entry>
<entry>Description</entry>
</row>
</thead>
<tbody>
<row>
<entry>PDO::CUBRID_SCH_TABLE</entry>
<entry>Get name and type of table in CUBRID.</entry>
</row>
<row>
<entry>PDO::CUBRID_SCH_VIEW</entry>
<entry>Get name and type of view in CUBRID.</entry>
</row>
<row>
<entry>PDO::CUBRID_SCH_QUERY_SPEC</entry>
<entry>Get the query definition of view.</entry>
</row>
<row>
<entry>PDO::CUBRID_SCH_ATTRIBUTE</entry>
<entry>Get the attributes of table column.</entry>
</row>
<row>
<entry>PDO::CUBRID_SCH_TABLE_ATTRIBUTE</entry>
<entry>Get the attributes of table.</entry>
</row>
<row>
<entry>PDO::CUBRID_SCH_METHOD</entry>
<entry>Get the instance method. The instance method is a method called
by a class instance. It is used more often than the class method
because most operations are executed in the instance.</entry>
</row>
<row>
<entry>PDO::CUBRID_SCH_TABLE_METHOD</entry>
<entry>Get the class method. The class method is a method called by a
class object. It is usually used to create a new class instance or to
initialize it. It is also used to access or update class
attributes.</entry>
</row>
<row>
<entry>PDO::CUBRID_SCH_METHOD_FILE</entry>
<entry>Get the information of the file where the method of the table is
defined.</entry>
</row>
<row>
<entry>PDO::CUBRID_SCH_SUPER_TABLE</entry>
<entry>Get the name and type of table which table inherites attributes
from.</entry>
</row>
<row>
<entry>PDO::CUBRID_SCH_SUB_TABLE</entry>
<entry>Get the name and type of table which inherites attributes from
this table.</entry>
</row>
<row>
<entry>PDO::CUBRID_SCH_CONSTRAINT</entry>
<entry>Get the table constraints.</entry>
</row>
<row>
<entry>PDO::CUBRID_SCH_TRIGGER</entry>
<entry>Get the table triggers.</entry>
</row>
<row>
<entry>PDO::CUBRID_SCH_TABLE_PRIVILEGE</entry>
<entry>Get the privilege information of table.</entry>
</row>
<row>
<entry>PDO::CUBRID_SCH_COL_PRIVILEGE</entry>
<entry>Get the privilege information of column.</entry>
</row>
<row>
<entry>PDO::CUBRID_SCH_DIRECT_SUPER_TABLE</entry>
<entry>Get the direct super table of table.</entry>
</row>
<row>
<entry>PDO::CUBRID_SCH_PRIMARY_KEY</entry>
<entry>Get the table primary key.</entry>
</row>
<row>
<entry>PDO::CUBRID_SCH_IMPORTED_KEYS</entry>
<entry>Get imported keys of table.</entry>
</row>
<row>
<entry>PDO::CUBRID_SCH_EXPORTED_KEYS</entry>
<entry>Get exported keys of table.</entry>
</row>
<row>
<entry>PDO::CUBRID_SCH_CROSS_REFERENCE</entry>
<entry>Get reference relationship of tow tables.</entry>
</row>
</tbody>
</tgroup>
</table>
</para>
</section>
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