LXX. Ingres II Functions

简介

These functions allow you to access Ingres II database servers.

注意: If you already used PHP extensions to access other database servers, note that Ingres doesn't allow concurrent queries and/or transaction over one connection, thus you won't find any result or transaction handle in this extension. The result of a query must be treated before sending another query, and a transaction must be committed or rolled back before opening another transaction (which is automatically done when sending the first query).

需求

To compile PHP with Ingres support, you need the Ingres OpenAPI library and header files.

安装

本 PECL 扩展未绑定于 PHP 中。安装此 PECL 扩展库的信息可在手册中标题为 PECL 扩展库安装的一章中找到。更多信息如新版本，下载，源文件，维护者信息以及更新日志等可以在这里找到： http://pecl.php.net/package/ingres.

In order to have these functions available, you must compile PHP with Ingres support by using the --with-ingres[=DIR] option, where DIR is the Ingres base directory, which defaults to /II/ingres. If the II_SYSTEM environment variable isn't correctly set you may have to use --with-ingres=DIR to specify your Ingres installation directory.

When using this extension with Apache, if Apache does not start and complains with "PHP Fatal error: Unable to start ingres_ii module in Unknown on line 0" then make sure the environment variable II_SYSTEM is correctly set. Adding "export II_SYSTEM="/home/ingres/II" in the script that starts Apache, just before launching httpd, should be fine.

运行时配置

这些函数的行为受 php.ini 的影响。

表 1. Ingres configuration options

Name	Default	Changeable	Changelog
ingres.allow_persistent	"1"	PHP_INI_SYSTEM	Available since PHP 4.0.2.
ingres.max_persistent	"-1"	PHP_INI_SYSTEM	Available since PHP 4.0.2.
ingres.max_links	"-1"	PHP_INI_SYSTEM	Available since PHP 4.0.2.
ingres.default_database	NULL	PHP_INI_ALL	Available since PHP 4.0.2.
ingres.default_user	NULL	PHP_INI_ALL	Available since PHP 4.0.2.
ingres.default_password	NULL	PHP_INI_ALL	Available since PHP 4.0.2.
ingres.report_db_warnings	"1"	PHP_INI_ALL	Available since version 1.1.0 of the PECL extension.
ingres.cursor_mode	"0"	PHP_INI_ALL	Available since version 1.1.0 of the PECL extension.
ingres.blob_segment_length	"4096"	PHP_INI_ALL	Available since version 1.2.0 of the PECL extension.
ingres.trace_connect	"0"	PHP_INI_ALL	Available since version 1.3.1 of the PECL extension.
ingres.timeout	"-1"	PHP_INI_ALL	Available since version 1.3.1 of the PECL extension.
ingres.array_index_start	"1"	PHP_INI_ALL	Available since version 1.3.1 of the PECL extension.

有关 PHP_INI_* 常量进一步的细节与定义参见附录 H。

资源类型

ingres_connect() and ingres_pconnect() return an Ingres II link identifier.

预定义常量

以下常量由本扩展模块定义，因此只有在本扩展模块被编译到 PHP 中，或者在运行时被动态加载后才有效。

INGRES_ASSOC (integer): Columns are returned into the array having the fieldname as the array index.
INGRES_NUM (integer): Columns are returned into the array having a numerical index to the fields. This index starts with 1, the first field in the result.
INGRES_BOTH (integer): Columns are returned into the array having both a numerical index and the fieldname as the array index.
INGRES_EXT_VERSION (string): Specifies the version of the Ingres Extension. Available since version 1.2.0 of the PECL extension.
INGRES_API_VERSION (integer): Specifies the version of Ingres OpenAPI the extension was built against. Available since version 1.2.0 of the PECL extension.
INGRES_CURSOR_READONLY (integer): Specifies that Ingres cursors should be opened in 'readonly' mode. Available since version 1.2.0 of the PECL extension.
INGRES_CURSOR_UPDATE (integer): Specifies that Ingres cursors should be opened 'for update'. Available since version 1.2.0 of the PECL extension.
INGRES_DATE_MULTINATIONAL (integer): Equivalent to the II_DATE_FORMAT setting of MULTINATIONAL. Available since version 1.2.0 of the PECL extension.
INGRES_DATE_MULTINATIONAL4 (integer): Equivalent to the II_DATE_FORMAT setting of MULTINATIONAL4. Available since version 1.2.0 of the PECL extension.
INGRES_DATE_FINNISH (integer): Equivalent to the II_DATE_FORMAT setting of FINNISH. Available since version 1.2.0 of the PECL extension.
INGRES_DATE_ISO (integer): Equivalent to the II_DATE_FORMAT setting of ISO. Available since version 1.2.0 of the PECL extension.
INGRES_DATE_ISO4 (integer): Equivalent to the II_DATE_FORMAT setting of ISO4. Available since version 1.2.0 of the PECL extension.
INGRES_DATE_GERMAN (integer): Equivalent to the II_DATE_FORMAT setting of GERMAN. Available since version 1.2.0 of the PECL extension.
INGRES_DATE_MDY (integer): Equivalent to the II_DATE_FORMAT setting of MDY. Available since version 1.2.0 of the PECL extension.
INGRES_DATE_DMY (integer): Equivalent to the II_DATE_FORMAT setting of DMY. Available since version 1.2.0 of the PECL extension.
INGRES_DATE_YMD (integer): Equivalent to the II_DATE_FORMAT setting of YMD. Available since version 1.2.0 of the PECL extension.
INGRES_MONEY_LEADING (integer): Specifies the currency character that should be placed at the start of a money value. Equivalent to setting II_MONEY_FORMAT to 'L:'. Available since version 1.2.0 of the PECL extension.
INGRES_MONEY_TRAILING (integer): Specifies the currency character that should be placed at the end of a money value. Equivalent to setting II_MONEY_FORMAT to 'T:'. Available since version 1.2.0 of the PECL extension.
INGRES_STRUCTURE_BTREE (integer): Specifies the default table or index structure to BTREE when used in combination with the table_structure or index_structure option when connecting. Available since version 1.4.0 of the PECL extension.
INGRES_STRUCTURE_CBTREE (integer): Specifies the default table or index structure to COMPRESSED BTREE when used in combination with the table_structure or index_structure option when connecting. Available since version 1.4.0 of the PECL extension.
INGRES_STRUCTURE_HASH (integer): Specifies the default table or index structure to HASH when used in combination with the table_structure or index_structure option when connecting. Available since version 1.4.0 of the PECL extension.
INGRES_STRUCTURE_CHASH (integer): Specifies the default table or index structure to COMPRESSED HASH when used in combination with the table_structure or index_structure option when connecting. Available since version 1.4.0 of the PECL extension.
INGRES_STRUCTURE_HEAP (integer): Specifies the default table structure to HEAP when used in combination with the table_structure option when connecting. Available since version 1.4.0 of the PECL extension.
INGRES_STRUCTURE_CHEAP (integer): Specifies the default table structure to COMPRESSED HEAP when used in combination with the table_structure option when connecting. Available since version 1.4.0 of the PECL extension.
INGRES_STRUCTURE_ISAM (integer): Specifies the default table or index structure to ISAM when used in combination with the table_structure or index_structure option when connecting. Available since version 1.4.0 of the PECL extension.
INGRES_STRUCTURE_CISAM (integer): Specifies the default table or index structure to COMPRESSED ISAM when used in combination with the table_structure or index_structure option when connecting. Available since version 1.4.0 of the PECL extension.

范例

This simple example shows how to connect, execute a query, print resulting rows and disconnect from an Ingres database.

例 1. Simple Ingres Example


<?php
// Connecting, selecting database
$link = ingres_connect('database', 'user', 'password')
    or die('Could not connect: ' . ingres_error($link));
echo 'Connected successfully';

// Select from a table that exists in all Ingres databases
$query = 'SELECT * FROM iirelation';
$returncode = ingres_query($query,$link) or die('Query failed: ' .
ingres_error($link));

// Print results in HTML
// relid - table name
// relowner - table owner
echo "<table>\n";
while ($iirelation = ingres_fetch_object(INGRES_BOTH, $link)) {
    echo "\t<tr>\n";
    echo "\t\t<td>" . $iirelation->relid . "</td>\n";
    echo "\t\t<td>" . $iirelation->relowner . "</td>\n";
    echo "\t</tr>\n";
}
echo "</table>\n";

// Commit transaction
ingres_commit($link);
// Closing connection
ingres_close($link);
?>

目录
ingres_autocommit -- Switch autocommit on or off
ingres_close -- Close an Ingres II database connection
ingres_commit -- Commit a transaction
ingres_connect -- Open a connection to an Ingres database
ingres_cursor -- Gets a cursor name for a given link resource
ingres_errno -- Gets the last ingres error number generated
ingres_error -- Gets a meaningful error message for the last error generated
ingres_errsqlstate -- Gets the last SQLSTATE error code generated
ingres_fetch_array -- Fetch a row of result into an array
ingres_fetch_object -- Fetch a row of result into an object
ingres_fetch_row -- Fetch a row of result into an enumerated array
ingres_field_length -- Get the length of a field
ingres_field_name -- Get the name of a field in a query result
ingres_field_nullable -- Test if a field is nullable
ingres_field_precision -- Get the precision of a field
ingres_field_scale -- Get the scale of a field
ingres_field_type -- Get the type of a field in a query result
ingres_num_fields -- Get the number of fields returned by the last query
ingres_num_rows -- Get the number of rows affected or returned by the last query
ingres_pconnect -- Open a persistent connection to an Ingres II database
ingres_query -- Send a SQL query to Ingres II
ingres_rollback -- Roll back a transaction