LVI. Ingres II Functions

Introduction

These functions allow you to access Ingres II database servers.

Note: 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).

Warning

This extension is EXPERIMENTAL. The behaviour of this extension -- including the names of its functions and anything else documented about this extension -- may change without notice in a future release of PHP. Use this extension at your own risk.

Requirements

To compile PHP with Ingres support, you need the Open API library and header files included with Ingres II.

Installation

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.

Runtime Configuration

The behaviour of these functions is affected by settings in php.ini.

Table 1. Ingres II 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.

For further details and definitions of the PHP_INI_* constants, see the Appendix H.

Resource Types

This extension has no resource types defined.

Predefined Constants

The constants below are defined by this extension, and will only be available when the extension has either been compiled into PHP or dynamically loaded at runtime.

INGRES_ASSOC (integer)
INGRES_NUM (integer)
INGRES_BOTH (integer)

Table of Contents
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 II database
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

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