NAME

Rose::DB::Informix - Informix driver class for Rose::DB.

SYNOPSIS

  use Rose::DB;
  Rose::DB->register_db(
    domain   => 'development',
    type     => 'main',
    driver   => 'Informix',
    database => 'dev_db',
    host     => 'localhost',
    username => 'devuser',
    password => 'mysecret',
    server_time_zone => 'UTC',
  );
  Rose::DB->default_domain('development');
  Rose::DB->default_type('main');
  ...
  # Set max length of varchar columns used to emulate the array data type
  Rose::DB::Informix->max_array_characters(128);
  $db = Rose::DB->new; # $db is really a Rose::DB::Informix-derived object
  $dt  = $db->parse_datetime_year_to_minute(...);
  $val = $db->format_datetime_year_to_minute($dt);
  $dt  = $db->parse_datetime_year_to_second(...);
  $val = $db->format_datetime_year_to_second($dt);
  ...

DESCRIPTION

Rose::DB blesses objects into a class derived from Rose::DB::Informix when the driver is "informix". This mapping of driver names to class names is configurable. See the documentation for Rose::DB's new() and driver_class() methods for more information.

This class cannot be used directly. You must use Rose::DB and let its new() method return an object blessed into the appropriate class for you, according to its driver_class() mappings.

Only the methods that are new or have different behaviors than those in Rose::DB are documented here. See the Rose::DB documentation for the full list of methods.

CLASS METHODS

default_supports_limit_with_offset [BOOL]

Get or set a boolean value that indicates whether or not all Informix databases that you plan to connect to support the "SELECT SKIP N FIRST M ..." syntax. If undefined, this feature will be looked up on a per-connection basis as needed. The default is undefined.

max_array_characters [INT]

Get or set the maximum length of varchar columns used to emulate the array data type. The default value is 255.

Informix does not have a native "ARRAY" data type, but it can be emulated using a "VARCHAR" column and a specially formatted string. The formatting and parsing of this string is handled by the "format_array()" and "parse_array()" object methods. The maximum length limit is honored by the "format_array()" object method.

Informix does have a native "SET" data type, serviced by the "parse_set()" and "format_set()" object methods. This is a better choice than the emulated array data type if you don't care about the order of the stored values.

OBJECT METHODS

Value Parsing and Formatting

format_array ARRAYREF | LIST

Given a reference to an array or a list of values, return a specially formatted string. Undef is returned if ARRAYREF points to an empty array or if LIST is not passed. The array or list must not contain undefined values.

If the resulting string is longer than "max_array_characters()", a fatal error will occur.

format_date DATETIME

Converts the DateTime object DATETIME into the appropriate format for the "DATE" data type.

format_datetime DATETIME

Converts the DateTime object DATETIME into the appropriate format for the "DATETIME YEAR TO SECOND" data type.

format_datetime_year_to_fraction DATETIME

Converts the DateTime object DATETIME into the appropriate format for the "DATETIME YEAR TO FRACTION" data type.

format_datetime_year_to_fraction_[1-5] DATETIME

Converts the DateTime object DATETIME into the appropriate format for the "DATETIME YEAR TO FRACTION(N)" data type, where N is an integer from 1 to 5.

format_datetime_year_to_minute DATETIME

Converts the DateTime object DATETIME into the appropriate format for the "DATETIME YEAR TO MINUTE" data type.

format_datetime_year_to_month DATETIME

Converts the DateTime object DATETIME into the appropriate format for the "DATETIME YEAR TO MONTH" data type.

format_datetime_year_to_second DATETIME

Converts the DateTime object DATETIME into the appropriate format for the "DATETIME YEAR TO SECOND" data type.

format_set ARRAYREF | LIST

Given a reference to an array or a list of values, return a string formatted according to the rules of Informix's "SET" data type. Undef is returned if ARRAYREF points to an empty array or if LIST is not passed. If the array or list contains undefined values, a fatal error will occur.

format_timestamp DATETIME

Converts the DateTime object DATETIME into the appropriate format for the "DATETIME YEAR TO FRACTION(5)" data type.

parse_array STRING | LIST | ARRAYREF

Parse STRING and return a reference to an array. STRING should be formatted according to the Informix array data type emulation format returned by "format_array()". Undef is returned if STRING is undefined.

If a LIST of more than one item is passed, a reference to an array containing the values in LIST is returned.

If a an ARRAYREF is passed, it is returned as-is.

parse_boolean STRING

Parse STRING and return a boolean value of 1 or 0. STRING should be formatted according to Informix's native "boolean" data type. Acceptable values are 't', 'T', or '1' for true, and 'f', 'F', or '0' for false.

If STRING is a valid boolean keyword (according to validate_boolean_keyword) or if it looks like a function call (matches /^\w+$.*$$/) and keyword_function_calls is true, then it is returned unmodified. Returns undef if STRING could not be parsed as a valid "boolean" value.

parse_date STRING

Parse STRING and return a DateTime object. STRING should be formatted according to the Informix "DATE" data type.

If STRING is a valid date keyword (according to validate_date_keyword) it is returned unmodified. Returns undef if STRING could not be parsed as a valid "DATE" value.

parse_datetime STRING

Parse STRING and return a DateTime object. STRING should be formatted according to the Informix "DATETIME YEAR TO SECOND" data type.

If STRING is a valid "datetime year to second" keyword (according to validate_datetime_year_to_second_keyword) it is returned unmodified. Returns undef if STRING could not be parsed as a valid "DATETIME YEAR TO SECOND" value.

parse_datetime_year_to_fraction STRING

Parse STRING and return a DateTime object. STRING should be formatted according to the Informix "DATETIME YEAR TO FRACTION" data type.

If STRING is a valid "datetime year to fraction" keyword (according to validate_datetime_year_to_fraction_keyword) it is returned unmodified. Returns undef if STRING could not be parsed as a valid "DATETIME YEAR TO FRACTION" value.

parse_datetime_year_to_fraction_[1-5] STRING

These five methods parse STRING and return a DateTime object. STRING should be formatted according to the Informix "DATETIME YEAR TO FRACTION(N)" data type, where N is an integer from 1 to 5.

If STRING is a valid "datetime year to fraction" keyword (according to validate_datetime_year_to_fraction_keyword) it is returned unmodified. Returns undef if STRING could not be parsed as a valid "DATETIME YEAR TO FRACTION(N)" value.

parse_datetime_year_to_minute STRING

Parse STRING and return a DateTime object. STRING should be formatted according to the Informix "DATETIME YEAR TO MINUTE" data type.

If STRING is a valid "datetime year to minute" keyword (according to validate_datetime_year_to_minute_keyword) it is returned unmodified. Returns undef if STRING could not be parsed as a valid "DATETIME YEAR TO MINUTE" value.

parse_datetime_year_to_month STRING

Parse STRING and return a DateTime object. STRING should be formatted according to the Informix "DATETIME YEAR TO MINUTE" data type.

If STRING is a valid "datetime year to month" keyword (according to validate_datetime_year_to_month_keyword) it is returned unmodified. Returns undef if STRING could not be parsed as a valid "DATETIME YEAR TO MONTH" value.

parse_datetime_year_to_second STRING

Parse STRING and return a DateTime object. STRING should be formatted according to the Informix "DATETIME YEAR TO SECOND" data type.

If STRING is a valid "datetime year to second" keyword (according to validate_datetime_year_to_second_keyword) it is returned unmodified. Returns undef if STRING could not be parsed as a valid "DATETIME YEAR TO SECOND" value.

parse_set STRING | LIST | ARRAYREF

Parse STRING and return a reference to an array. STRING should be formatted according to Informix's "SET" data type. Undef is returned if STRING is undefined.

If a LIST of more than one item is passed, a reference to an array containing the values in LIST is returned.

If a an ARRAYREF is passed, it is returned as-is.

parse_timestamp STRING

Parse STRING and return a DateTime object. STRING should be formatted according to the Informix "DATETIME YEAR TO FRACTION(5)" data type.

If STRING is a valid timestamp keyword (according to validate_timestamp_keyword) it is returned unmodified. Returns undef if STRING could not be parsed as a valid "DATETIME YEAR TO FRACTION(5)" value.

validate_boolean_keyword STRING

Returns true if STRING is a valid keyword for the "boolean" data type of the current data source, false otherwise. Valid (case-insensitive) boolean keywords are:

    TRUE
    FALSE

validate_date_keyword STRING

Returns true if STRING is a valid keyword for the Informix "date", false otherwise. Valid (case-insensitive) date keywords are:

    current
    today

The keywords are not case sensitive. Any string that looks like a function call (matches /^\w+$.*$$/) is also considered a valid date keyword if keyword_function_calls is true.

validate_datetime_keyword STRING

Returns true if STRING is a valid keyword for the Informix "datetime year to second" data type, false otherwise. Valid (case-insensitive) datetime keywords are:

    current
    current year to second
    current year to minute
    current year to hour
    current year to day
    current year to month
    today

The keywords are not case sensitive. Any string that looks like a function call (matches /^\w+$.*$$/) is also considered a valid datetime keyword if keyword_function_calls is true.

validate_datetime_year_to_fraction_keyword STRING

Returns true if STRING is a valid keyword for the Informix "datetime year to fraction(n)" data type (where n is an integer from 1 to 5), false otherwise. Valid (case-insensitive) "datetime year to fraction" keywords are:

    current
    current year to fraction
    current year to fraction(1)
    current year to fraction(2)
    current year to fraction(3)
    current year to fraction(4)
    current year to fraction(5)
    current year to second
    current year to minute
    current year to hour
    current year to day
    current year to month
    today

The keywords are not case sensitive. Any string that looks like a function call (matches /^\w+$.*$$/) is also considered a valid "datetime year to fraction" keyword if keyword_function_calls is true.

validate_datetime_year_to_minute_keyword STRING

Returns true if STRING is a valid keyword for the Informix "datetime year to minute" data type, false otherwise. Valid (case-insensitive) "datetime year to minute" keywords are:

    current
    current year to second
    current year to minute
    current year to hour
    current year to day
    current year to month
    today

The keywords are not case sensitive. Any string that looks like a function call (matches /^\w+$.*$$/) is also considered a valid "datetime year to minute" keyword if keyword_function_calls is true.

validate_datetime_year_to_month_keyword STRING

Returns true if STRING is a valid keyword for the Informix "datetime year to month" data type, false otherwise. Valid (case-insensitive) "datetime year to month" keywords are:

    current
    current year to second
    current year to minute
    current year to hour
    current year to day
    current year to month
    today

The keywords are not case sensitive. Any string that looks like a function call (matches /^\w+$.*$$/) is also considered a valid "datetime year to month" keyword if keyword_function_calls is true.

validate_datetime_year_to_second_keyword STRING

Returns true if STRING is a valid keyword for the Informix "datetime year to second" data type, false otherwise. Valid (case-insensitive) datetime keywords are:

    current
    current year to second
    current year to minute
    current year to hour
    current year to day
    current year to month
    today

The keywords are not case sensitive. Any string that looks like a function call (matches /^\w+$.*$$/) is also considered a valid "datetime year to second" keyword if keyword_function_calls is true.

validate_timestamp_keyword STRING

Returns true if STRING is a valid keyword for the Informix "timestamp" data type, false otherwise. Valid (case-insensitive) timestamp keywords are:

    current
    current year to fraction
    current year to fraction(1)
    current year to fraction(2)
    current year to fraction(3)
    current year to fraction(4)
    current year to fraction(5)
    current year to second
    current year to minute
    current year to hour
    current year to day
    current year to month
    today

The keywords are not case sensitive. Any string that looks like a function call (matches /^\w+$.*$$/) is also considered a valid timestamp keyword if keyword_function_calls is true.

AUTHOR

John C. Siracusa (siracusa@gmail.com)