52
DBMS_MGWMSG

DBMS_MGWMSG provides:

• Object types used by the canonical message types to convert message bodies.
• Methods, constants, and subprograms for working with Messaging Gateway message types.

  See Also: Chapter 51, "DBMS_MGWADM" which describes the Messaging Gateway administrative interface, DBMS_MGWADM

This chapter contains the following topics:

• Using DBMS_MGWMSG
  • Security Model
  • Constants
  • Types
• Summary of DBMS_MGWMSG Subprograms

---

Using DBMS_MGWMSG

• Security Model
• Constants
• Types

---

Security Model

The DBMS_MGWMSG packages and object types are owned by SYS.

---

Constants

Table 52-1  DBMS_MGWMSG Constants: Value Types and Constants Representing the Type of Value for a SYS.MGW_NAME_VALUE_T Object

Value	Constant
TEXT_VALUE	CONSTANT BINARY_INTEGER := 1
RAW_VALUE	CONSTANT BINARY_INTEGER := 2
BOOLEAN_VALUE	CONSTANT BINARY_INTEGER := 3
BYTE_VALUE	CONSTANT BINARY_INTEGER := 4
SHORT_VALUE	CONSTANT BINARY_INTEGER := 5
INTEGER_VALUE	CONSTANT BINARY_INTEGER := 6
LONG_VALUE	CONSTANT BINARY_INTEGER := 7
FLOAT_VALUE	CONSTANT BINARY_INTEGER := 8
DOUBLE_VALUE	CONSTANT BINARY_INTEGER := 9
DATE_VALUE	CONSTANT BINARY_INTEGER := 10

Table 52-2  DBMS_MGWMSG Constants: Boolean Values--Constants Representing a Boolean as a Numeric Value

Value	Constant
BOOLEAN_FALSE	CONSTANT BINARY_INTEGER := 0
BOOLEAN_TRUE	CONSTANT BINARY_INTEGER := 1

Table 52-3  DBMS_MGWMSG Constants: Case Comparisons

Value	Constant
CASE_SENSITIVE	CONSTANT BINARY_INTEGER := 0
CASE_INSENSITIVE	CONSTANT BINARY_INTEGER := 1

Table 52-4  Constants for the TIB/Rendezvous field type

Value	Constant
TIBRVMSG_BOOL	CONSTANT INTEGER := 1
TIBRVMSG_F32	CONSTANT INTEGER := 2
TIBRVMSG_F64	CONSTANT INTEGER := 3
TIBRVMSG_I8	CONSTANT INTEGER := 4
TIBRVMSG_I16	CONSTANT INTEGER := 5
TIBRVMSG_I32	CONSTANT INTEGER := 6
TIBRVMSG_I64	CONSTANT INTEGER := 7
TIBRVMSG_IPADDR32	CONSTANT INTEGER := 8
TIBRVMSG_IPPORT16	CONSTANT INTEGER := 9
TIBRVMSG_DATETIME	CONSTANT INTEGER := 10
TIBRVMSG_F32ARRAY	CONSTANT INTEGER := 11
TIBRVMSG_F64ARRAY	CONSTANT INTEGER := 12
TIBRVMSG_I8ARRAY	CONSTANT INTEGER := 13
TIBRVMSG_I16ARRAY	CONSTANT INTEGER := 14
TIBRVMSG_I32ARRAY	CONSTANT INTEGER := 15
TIBRVMSG_I64ARRAY	CONSTANT INTEGER := 16
TIBRVMSG_OPAQUE	CONSTANT INTEGER := 17
TIBRVMSG_STRING	CONSTANT INTEGER := 18
TIBRVMSG_XML	CONSTANT INTEGER := 19

---

Types

• SYS.MGW_NAME_VALUE_T Type
• SYS.MGW_NAME_VALUE_T Type-Attribute Mapping
• SYS.MGW_NAME_TYPE_ARRAY_T Type
• SYS.MGW_TEXT_VALUE_T Type
• SYS.MGW_RAW_VALUE_T Type
• SYS.MGW_BASIC_MSG_T Type
• SYS.MGW_NUMBER_ARRAY_T Type
• SYS.MGW_TIBRV_FIELD_T Type
• SYS.MGW_TIBRV_MSG_T Type

SYS.MGW_NAME_VALUE_T Type

This type specifies a named value. The name attribute, type attribute, and one of the <>_value attributes are typically not NULL.

Syntax

TYPE SYS.MGW_NAME_VALUE_T IS OBJECT(
   name               VARCHAR2(250),
   type               INTEGER,
   integer_value      INTEGER,
   number_value       NUMBER,
   text_value         VARCHAR2(4000),
   raw_value          RAW(2000),
   date_value         DATE,

-- Methods
STATIC FUNCTION CONSTRUCT
RETURN SYS.MGW_NAME_VALUE_T,

STATIC FUNCTION CONSTRUCT_BOOLEAN (
   name   IN VARCHAR2,
   value  IN INTEGER )
RETURN SYS.MGW_NAME_VALUE_T,

STATIC FUNCTION CONSTRUCT_BYTE (
   name   IN VARCHAR2,
   value  IN INTEGER )
RETURN SYS.MGW_NAME_VALUE_T,

STATIC FUNCTION CONSTRUCT_SHORT (
   name   IN VARCHAR2,
   value  IN INTEGER )
RETURN SYS.MGW_NAME_VALUE_T,

STATIC FUNCTION CONSTRUCT_INTEGER (
   name   IN VARCHAR2,
   value  IN INTEGER )
RETURN SYS.MGW_NAME_VALUE_T,

STATIC FUNCTION CONSTRUCT_LONG (
   name   IN VARCHAR2,
   value  IN NUMBER )
RETURN SYS.MGW_NAME_VALUE_T,

STATIC FUNCTION CONSTRUCT_FLOAT (
   name   IN VARCHAR2,
   value  IN NUMBER )
RETURN SYS.MGW_NAME_VALUE_T,

STATIC FUNCTION CONSTRUCT_DOUBLE (
   name   IN VARCHAR2,
   value  IN NUMBER )
RETURN SYS.MGW_NAME_VALUE_T,

STATIC FUNCTION CONSTRUCT_TEXT (
   name   IN VARCHAR2,
   value  IN VARCHAR2 )
RETURN SYS.MGW_NAME_VALUE_T,

STATIC FUNCTION CONSTRUCT_RAW (
   name  IN VARCHAR2,
   value  IN RAW )
RETURN SYS.MGW_NAME_VALUE_T,

STATIC FUNCTION CONSTRUCT_DATE (
   name   IN VARCHAR2,
   value  IN DATE )
RETURN SYS.MGW_NAME_VALUE_T );

Attributes

Table 52-5  SYS.MGW_NAME_VALUE_T Attributes

Attribute	Description
name	Name associated with the value
type	Value type. Refer to the DBMS_MGWMSG.<>_VALUE constants in Table 52-1. This indicates which Java datatype and class are associated with the value. It also indicates which attribute stores the value.
integer_value	Stores a numeric integer value
number_value	Stores a numeric float or large integer value
text_value	Stores a text value
raw_value	Stores a RAW (bytes) value
date_value	Stores a date value

SYS.MGW_NAME_VALUE_T Type-Attribute Mapping

Table 52-6 shows the mapping between the value type and the attribute used to store the value.

Table 52-6  SYS.MGW_NAME_VALUE_T Type Attribute Mapping

Type	Value Stored in Attribute
DBMS_MGWMSG.TEXT_VALUE	text_value
DBMS_MGWMSG.RAW_VALUE	raw_value
DBMS_MGWMSG.BOOLEAN_VALUE	integer_value
DBMS_MGWMSG.BYTE_VALUE	integer_value
DBMS_MGWMSG.SHORT_VALUE	integer_value
DBMS_MGWMSG.INTEGER_VALUE	integer_value
DBMS_MGWMSG.LONG_VALUE	number_value
DBMS_MGWMSG.FLOAT_VALUE	number_value
DBMS_MGWMSG.DOUBLE_VALUE	number_value
DBMS_MGWMSG.DATE_VALUE	date_value

CONSTRUCT Method

This method constructs a new SYS.MGW_NAME_VALUE_T instance. All attributes are assigned a value of NULL.

Syntax

STATIC FUNCTION CONSTRUCT
RETURN SYS.MGW_NAME_VALUE_T;

CONSTRUCT_TYPE Methods

These methods construct a new SYS.MGW_NAME_VALUE_T instance initialized with the value of a specific type. Each method sets the name and type attributes and one of the <>_value attributes, as shown in the mappings in Table 52-6.

Syntax

STATIC FUNCTION CONSTRUCT_<> (
   name   IN VARCHAR2,
   value  IN datatype )
RETURN SYS.MGW_NAME_VALUE_T;

Usage Notes

The construct_boolean method sets the value to either DBMS_MGWMSG.BOOLEAN_TRUE or DBMS_MGWMSG.BOOLEAN_FALSE.

SYS.MGW_NAME_TYPE_ARRAY_T Type

This type specifies an array of name-value pairs. An object of SYS.MGW_NAME_VALUE_ARRAY_T type can have up to 1024 elements.

Syntax

TYPE SYS.MGW_NAME_VALUE_ARRAY_T 
  AS VARRAY (1024) OF SYS.MGW_NAME_VALUE_T;

SYS.MGW_TEXT_VALUE_T Type

This type specifies a TEXT value. It can store a large value as a CLOB or a smaller value (size <= 4000) as VARCHAR2. Only one of the < >_ value attributes should be set.

Syntax

TYPE SYS.MGW_TEXT_VALUE_T IS OBJECT(
   small_value VARCHAR2(4000),
   large_value CLOB,

-- Methods
STATIC FUNCTION CONSTRUCT
RETURN SYS.MGW_TEXT_VALUE_T);

Attributes

Table 52-7  SYS.MGW_TEXT_VALUE_T Attributes

Attribute	Description
small_value	Small TEXT value. Used for values <= 4000.
large_value	Large TEXT value. Used when the value is too large for the small_value attribute.

CONSTRUCT Method

This method constructs a new SYS.MGW_TEXT_VALUE_T instance. All attributes are assigned a value of NULL.

Syntax

STATIC FUNCTION CONSTRUCT
RETURN SYS.MGW_TEXT_VALUE_T;

SYS.MGW_RAW_VALUE_T Type

This type specifies a RAW value. This type can store a large value as a BLOB or a smaller value (size <= 2000) as RAW. You must set no more than one of the < >_value attributes.

Syntax

TYPE SYS.MGW_RAW_VALUE_T IS OBJECT(
   small_value RAW(2000),
   large_value BLOB,

--Methods
STATIC FUNCTION CONSTRUCT
RETURN SYS.MGW_RAW_VALUE_T);

Attributes

Table 52-8  SYS.MGW_RAW_VALUE_T Attributes

Attribute	Description
small_value	Small RAW (bytes) value <= 2000
large_value	Large RAW value. Used when the value is too large for the small_value attribute.

CONSTRUCT Method

This method constructs a new SYS.MGW_RAW_VALUE_T instance. All attributes are assigned a value of NULL.

Syntax

STATIC FUNCTION CONSTRUCT
RETURN SYS.MGW_RAW_VALUE_T;

SYS.MGW_BASIC_MSG_T Type

This is a canonical type for a basic TEXT or RAW message. Only a single TEXT or RAW value is typically set. An object of this type must not have both TEXT and RAW set to a not NULL value at the same time.

Syntax

TYPE SYS.MGW_BASIC_MSG_T IS OBJECT(
   header     SYS.MGW_NAME_VALUE_ARRAY_T,
   text_body  SYS.MGW_TEXT_VALUE_T,
   raw_body   SYS.MGW_RAW_VALUE_T,

--Methods
STATIC FUNCTION CONSTRUCT
RETURN SYS.MGW_BASIC_MSG_T);

Attributes

Table 52-9  SYS.MGW_BASIC_MSG_T Attributes

Attribute	Description
header	Message header information as an array of name-value pairs
text_body	Message body for a TEXT message
raw_body	Message body for a RAW (bytes) message

CONSTRUCT Method

This method constructs a new SYS.MGW_BASIC_MSG_T instance. All attributes are assigned a value of NULL.

Syntax

STATIC FUNCTION CONSTRUCT
RETURN SYS.MGW_BASIC_MSG_T;

SYS.MGW_NUMBER_ARRAY_T Type

A type that specifies an array of numbers.

Syntax

TYPE SYS.MGW_NUMBER_ARRAY_T AS VARRAY(1024) OF NUMBER;

SYS.MGW_TIBRV_FIELD_T Type

A type representing a TIB/Rendezvous message field, typically used in a read-only fashion to retrieve field information from a SYS.MGW_TIBRV_MSG_T instance.

Syntax

TYPE SYS.MGW_TIBRV_FIELD_T IS OBJECT(
   field_name       VARCHAR2(256),
   field_id         INTEGER,
   field_type       INTEGER,
   number_value     NUMBER,
   number_array_value  SYS.MGW_NUMBER_ARRAY_T,
   text_value       VARCHAR2(4000),
   raw_value        RAW(2000),
   date_value       DATE,
   clob_value       CLOB,
   blob_value       BLOB);

Attributes

Table 52-10  SYS.MGW_TIBRV_FIELD_T Attributes

Attribute	Description
field_name	Field name. This will be NULL if the field has no name.
field_id	Field identifier. If the field identifier is zero (0), then that field is considered not to have a field identifier. Otherwise the field identifier is a nonzero value that is unique for all fields of that message.
field_type	Field wire format datatype. The DBMS_MGWMSG.TIBRVMSG_<> constants represent valid values for this attribute. The value of this field discriminates which value attribute is used to store the field data.
number_value	Used to store a numeric value
number_array_value	Used to store a numeric array value
text_value	Used to store a small text value
raw_value	Used to store a small raw value
date_value	Used to store a date value
clob_value	Used to store a large text value. This is used when the text data will not fit in text_value, that is, when size is larger than 4000.
blob_value	Used to store a large raw value. This is used when the raw data will not fit in raw_value; that is, when size is larger than 2000.

SYS.MGW_TIBRV_FIELD_T Type and Attribute Mapping

Table 52-11 describes the mapping in type SYS.MGW_TIBRV_FIELD_T between the field type and attribute used to store the value.

Table 52-11  SYS.MGW_TIBRV_FIELD_T Type and Attribute Mapping

Field Type (DBMS_MGWMSG constant)	Value Stored in Attribute
TIBRVMSG_BOOL	number_value
TIBRVMSG_F32	number_value
TIBRVMSG_F64	number_value
TIBRVMSG_I8	number_value
TIBRVMSG_I16	number_value
TIBRVMSG_I32	number_value
TIBRVMSG_I64	number_value
TIBRVMSG_IPADDR32	text_value
TIBRVMSG_IPPORT16	number_value
TIBRVMSG_DATETIME	date_value
TIBRVMSG_F32ARRAY	number_array_value
TIBRVMSG_F64ARRAY	number_array_value
TIBRVMSG_I8ARRAY	number_array_value
TIBRVMSG_I16ARRAY	number_array_value
TIBRVMSG_I32ARRAY	number_array_value
TIBRVMSG_I64ARRAY	number_array_value
TIBRVMSG_OPAQUE	raw_value or blob_value
TIBRVMSG_STRING	text_value or clob_value
TIBRVMSG_XML	raw_value or blob_value

SYS.MGW_TIBRV_MSG_T Type

A type representing a TIB/Rendezvous message. You must never directly reference the attributes of this type. Instead use the type methods.

Syntax

TYPE SYS.MGW_TIBRV_MSG_T IS OBJECT(
   send_subject    VARCHAR2(256),
   reply_subject   VARCHAR2(256),
   cm_time_limit   NUMBER,
   cm_sender_name  VARCHAR2(256),
   cm_sequence_num NUMBER,
   fields          SYS.MGW_TIBRV_IFIELDS_T,
   clob_data1      CLOB, 
   clob_data2      CLOB,
   clob_data3      CLOB,
   blob_data1      BLOB,
   blob_data2      BLOB,
   blob_data3      BLOB,

STATIC FUNCTION construct
RETURN SYS.MGW_TIBRV_MSG_T,

MEMBER PROCEDURE add_bool (
    name  IN   VARCHAR2,
    id    IN   INTEGER,
    value IN   INTEGER ),

MEMBER PROCEDURE add_f32 (
    name  IN   VARCHAR2,
    id    IN   INTEGER,
    value IN   FLOAT ),

MEMBER PROCEDURE add _f64 (
    name  IN   VARCHAR2,
    id    IN   INTEGER,
    value IN   DOUBLE ),

MEMBER PROCEDURE add_i8 (
    name  IN  VARCHAR2,
    id    IN  INTEGER,
    value IN  INTEGER ),

MEMBER PROCEDURE add_i16 (
     name  IN  VARCHAR2,
     id    IN  INTEGER,
     value IN  INTEGER ),

MEMBER PROCEDURE add_i32 (
     name  IN  VARCHAR2,
     id    IN  INTEGER,
     value IN  INTEGER ),

MEMBER PROCEDURE add_i64 (
     name  IN  VARCHAR2,
     id    IN  INTEGER,
     value IN  NUMBER ),

MEMBER PROCEDURE add_ipaddr32 (
     name  IN  VARCHAR2, 
     id    IN  INTEGER, 
     value IN  VARCHAR2 ),

MEMBER PROCEDURE add_ipport16 (
     name  IN  VARCHAR2,
     id    IN  INTEGER, 
     value IN  INTEGER ),

MEMBER PROCEDURE add_datetime (
     name  IN  VARCHAR2,
     id    IN  INTEGER,
     value IN  DATE ),

MEMBER PROCEDURE add_f32array (
     name  IN  VARCHAR2,
     id    IN  INTEGER,
     value IN  SYS.MGW_NUMBER_ARRAY_T ),

MEMBER PROCEDURE add_f64array (
     name  IN  VARCHAR2,
     id    IN  INTEGER,
     value IN  SYS.MGW_NUMBER_ARRAY_T ),

MEMBER PROCEDURE add_i8array (
     name  IN  VARCHAR2,
     id    IN  INTEGER,
     value IN  SYS.MGW_NUMBER_ARRAY_T ),

MEMBER PROCEDURE add_i16array (
     name  IN  VARCHAR2,
     id    IN  INTEGER,
     value IN  SYS.MGW_NUMBER_ARRAY_T ),

MEMBER PROCEDURE add_i32array (
     name  IN  VARCHAR2,
     id    IN  INTEGER,
     value IN  SYS.MGW_NUMBER_ARRAY_T ),

MEMBER PROCEDURE add_i64array (
     name  IN  VARCHAR2,
     id    IN  INTEGER,
     value IN  SYS.MGW_NUMBER_ARRAY_T ),

MEMBER PROCEDURE add_string (
     name  IN  VARCHAR2,
     id    IN  INTEGER,
     value IN  VARCHAR2 ),

MEMBER PROCEDURE add_string (
     name  IN  VARCHAR2,
     id    IN  INTEGER,
     value IN  CLOB ),

MEMBER PROCEDURE add_opaque (
     name  IN  VARCHAR2,
     id    IN  INTEGER,
     value IN  RAW ),

MEMBER PROCEDURE add_opaque (
     name  IN  VARCHAR2,
     id    IN  INTEGER,
     value IN  BLOB ),

MEMBER PROCEDURE add_xml (
     name  IN  VARCHAR2,
     id    IN  INTEGER,
     value IN  RAW ),

MEMBER PROCEDURE add_xml (
     name  IN  VARCHAR2,
     id    IN  INTEGER,
     value IN  BLOB ),

MEMBER PROCEDURE set_send_subject (
     value  IN  VARCHAR2 ),

MEMBER PROCEDURE set_reply_subject (
     value  IN  VARCHAR2 ),

MEMBER PROCEDURE set_cm_time_limit (
     value  IN  NUMBER ),

MEMBER PROCEDURE set_cm_sender_name (
     value IN  VARCHAR2 ),

MEMBER PROCEDURE set_cm_sequence_num (
     value IN NUMBER ),

MEMBER FUNCTION get_send_subject
RETURN VARCHAR2,

MEMBER FUNCTION get_reply_subject
RETURN VARCHAR2,

MEMBER FUNCTION get_cm_time_limit
RETURN NUMBER,

MEMBER FUNCTION get_cm_sender_name
RETURN VARCHAR2,

MEMBER FUNCTION get_cm_sequence_num
RETURN NUMBER,

MEMBER FUNCTION get_field_count
RETURN INTEGER,

MEMBER FUNCTION get_field (
     idx    IN INTEGER )
RETURN SYS.MGW_TIBRV_FIELD_T,

MEMBER FUNCTION get_field_by_name (
     name   IN  VARCHAR2 )
RETURN SYS.MGW_TIBRV_FIELD_T,

MEMBER FUNCTION get_field_by_id (
     id     IN  INTEGER )
RETURN SYS.MGW_TIBRV_FIELD_T,

MEMBER FUNCTION find_field_name (
     name   IN  VARCHAR2,
     start_idx IN INTEGER )
RETURN INTEGER,

MEMBER FUNCTION find_field_id (
     id     IN INTEGER,
     start_idx IN INTEGER )
RETURN INTEGER
);

Attributes

Table 52-12  SYS.MGW_TIBRV_MSG_T Type Attributes

Attribute	Description
send_subject	Send subject name
reply_subject	Reply subject name
cm_time_limit	Time limit for a certified message
cm_sender_name	Sender name of a certified message
cm_sequence_num	Sequence number of a certified message
fields	Collection of message fields
clob_data1	Used to store a large text value
clob_data2	Used to store a large text value
clob_data3	Used to store a large text value
blob_data1	Used to store a large raw value
blob_data2	Used to store a large raw value
blob_data3	Used to store a large raw value

Construct Method

Constructs a new SYS.MGW_TIBRV_MSG_T instance. All attributes are set to NULL.

Syntax

STATIC FUNCTION construct
RETURN SYS.MGW_TIBRV_MSG_T;

ADD_<> Procedures

Adds a new field to the message.

Syntax

MEMBER PROCEDURE ADD_<> ( 
   name  IN  VARCHAR2,
   id    IN  INTEGER,
   value IN  datatype );

Parameters

Table 52-13  SYS.MGW_TIBRV_MSG_T ADD_<> Method Parameters

Parameter	Description
name	Field name
id	Field identifier
value	Field data

Table 52-14 shows, for each add method, the field type that will be assigned and valid values for the field data.

Table 52-14  MGW_TIBRV_MSG_T Add Method Field Types

Method Name	Field Type Assigned	Comment
add_bool	TIBRVMSG_BOOL	Valid values: 0 (false), 1 (true)
add_f32	TIBRVMSG_F32	n/a
add_f64	TIBRVMSG_F64	n/a
add_i8	TIBRVMSG_I8	Valid range: -128...127
add_i16	TIBRVMSG_I16	Valid range: -32768...32767
add_i32	TIBRVMSG_I32	Valid range: -2147483648... 2147483647
add_i64	TIBRVMSG_I64	n/a
add_ipaddr32	TIBRVMSG_IPADDR32	n/a
add_ipport16	TIBRVMSG_IPPORT16	n/a
add_datetime	TIBRVMSG_DATETIME	n/a
add_f32array	TIBRVMSG_F32ARRAY	n/a
add_f64array	TIBRVMSG_F64ARRAY	n/a
add_i8array	TIBRVMSG_I8ARRAY	Valid range: -128...127
add_i16array	TIBRVMSG_I16ARRAY	Valid range: -32768...32767
add_i32array	TIBRVMSG_I32ARRAY	Valid range: -2147483648... 2147483647
add_i64array	TIBRVMSG_I64ARRAY	n/a
add_opaque	TIBRVMSG_OPAQUE	Value stored as RAW if size < 2000; otherwise value stored in BLOB
add_string	TIBRVMSG_STRING	Value stored as VARCHAR2 if size < 4000; otherwise value stored in CLOB
add_xml	TIBRVMSG_XML	Value stored as RAW if size < 2000; otherwise value stored in BLOB

SET_<> Methods

Accessor methods to set an instance attribute to a specific value.

Syntax

MEMBER PROCEDURE SET_<> (
  value IN datatype );

Parameters

Table 52-15  SYS.MGW_TIBRV_MSG_T SET_<> Method Parameters

Parameter	Description
value	Value to be assigned

GET_<> Methods

Accessor methods to retrieve the value for an instance attribute.

Syntax

MEMBER PROCEDURE GET_<>
RETURN datatype;

Parameters

None

Return Values

Returns the attribute value.

GET_FIELD_COUNT Procedure

Gets the number of message fields.

Syntax

MEMBER PROCEDURE get_field_count
RETURN INTEGER;

Parameters

None

Return Values

Returns the number of fields, or zero (0) if there are none.

GET_FIELD Procedure

Retrieves field information for the field having a given field collection index. This method should only be called if get_field_count() returns a nonzero value and idx must specify a valid collection index; that is, 1<=idx<=get_field_count().

Syntax

MEMBER PROCEDURE get_field ( 
    idx    IN    INTEGER ) 
RETURN SYS.MGW_TIBRV_FIELD_T; 

Parameters

Table 52-16  SYS.MGW_TIBRV_MSG_T GET_FIELD Procedure Parameters

Parameter	Description
idx	Specifies the 1-based field collection index of the field to retrieve

Return Values

Returns the field information.

GET_FIELD_BY_NAME Procedure

Retrieves field information for the first field that has a given field name. The name comparison is case-sensitive.

Syntax

MEMBER PROCEDURE get_field_by_name (
   name  IN   VARCHAR2 )
RETURN SYS.MGW_TIBRV_FIELD_T;

Parameters

Table 52-17  SYS.MGW_TIBRV_MSG_T GET_FIELD_BY_NAME Procedure Parameters

Parameter	Description
name	Specifies the field name to search for. This can be NULL to find the first field that does not have a field name.

Return Values

Returns the field information, or NULL if no match was found.

GET_FIELD_BY_ID Procedure

Retrieves field information for the first field that has a given field identifier.

A field can have either a unique identifier or no identifier. If the field identifier value is zero (0) or NULL, then the field is considered to have no identifier. Otherwise, the identifier is a nonzero value that is unique for all the fields of this message.

Syntax

MEMBER PROCEDURE get_field_by_id (
   id   IN  INTEGER )
RETURN SYS.MGW_TIBRV_FIELD_T;

Parameters

Table 52-18  SYS.MGW_TIBRV_MSG_T GET_FIELD_BY_ID Procedure Parameters

Parameter	Description
id	Specifies the field identifier to search for. This can be zero (0) or NULL to find the first field that does not have an identifier.

Return Values

Returns the field information, or NULL if no match was found.

FIND_FIELD_NAME Procedure

Searches for a field with a given field name, starting from a given index of the field collection. It returns the index of that field. The name comparison is case-sensitive. This function is useful for finding all the fields that have the same name.

Syntax

MEMBER PROCEDURE find_field_name (
   name      IN  VARCHAR2,
   start_idx IN  INTEGER )
RETURN INTEGER;

Parameters

Table 52-19  SYS.MGW_TIBRV_MSG_T FIND_FIELD_NAME Procedure Parameters

Parameter	Description
name	Specifies the field name to search for. This can be NULL to search for a field that does not have a field name.
start_idx	Specifies the 1-based field collection index from which the search should start.

Return Values

Returns the field index (> 0) if a match was found, or zero (0) if no match was found.

FIND_FIELD_ID Procedure

Searches for a field with a given field identifier, starting from a given index of the field collection. It returns the index of that field.

Syntax

MEMBER PROCEDURE find_field_id (
     id        IN  INTEGER,
     start_idx IN INTEGER )
RETURN    INTEGER;

Parameters

Table 52-20  SYS.MGW_TIBRV_MSG_T FIND_FIELD_ID Procedure Parameters

Parameter	Description
id	Specifies the field identifier to search for. This can be zero (0) or NULL to find a field that does not have an identifier.
start_idx	Specifies the 1-based field collection index from which the search should start.

Return Values

Returns the field index (> 0) if a match was found, or zero (0) if no match was found.

---

Summary of DBMS_MGWMSG Subprograms

Table 52-21  DBMS_MGWMSG Package Subprograms

Subprogram	Description
NVARRAY_ADD Procedure	Appends a name-value element to the end of a name-value array
NVARRAY_GET Function	Gets the name-value element of the name you specify in p_name from a name-value array
NVARRAY_GET_BOOLEAN Function	Gets the value of the name-value array element that you specify in p_name and with the BOOLEAN_VALUE value type
NVARRAY_GET_BYTE Function	Gets the value of the name-value array element that you specify in p_name and with the BYTE_VALUE value type
NVARRAY_GET_SHORT Function	Gets the value of the name-value array element that you specify in p_name and with the SHORT_VALUE value type
NVARRAY_GET_INTEGER Function	Gets the value of the name-value array element that you specify in p_name and with the INTEGER_VALUE value type
NVARRAY_GET_LONG Function	Gets the value of the name-value array element that you specify in p_name and with the LONG_VALUE value type
NVARRAY_GET_FLOAT Function	Gets the value of the name-value array element that you specify in p_name and with the FLOAT_VALUE value type
NVARRAY_GET_DOUBLE Function	Gets the value of the name-value array element that you specify in p_name and with the DOUBLE_VALUE value type
NVARRAY_GET_TEXT Function	Gets the value of the name-value array element that you specify in p_name and with the TEXT_VALUE value type
NVARRAY_GET_RAW Function	Gets the value of the name-value array element that you specify in p_name and with the RAW_VALUE value type
NVARRAY_GET_DATE Function	Gets the value of the name-value array element that you specify in p_name and with the DATE_VALUE value type
NVARRAY_FIND_NAME Function	Searches a name-value array for the element with the name you specify in p_name
NVARRAY_FIND_NAME_TYPE Function	Searches a name-value array for an element with the name and value type you specify

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NVARRAY_ADD Procedure

This procedure appends a name-value element to the end of a name-value array.

Syntax

DBMS_MGWMSG.NVARRAY_ADD (
   p_array  IN OUT SYS.MGW_NAME_VALUE_ARRAY_T,
   p_value  IN     SYS.MGW_NAME_VALUE_T );

Parameters

Table 52-22  NVARRAY_ADD Procedure Parameters

Parameter	Description
p_array	On input, the name-value array instance to modify. If NULL, then a new array is created. On output, the modified name-value array instance.
p_value	The value to add. If NULL, then p_array is not changed.

---

NVARRAY_GET Function

This function gets the name-value element of the name you specify in p_name from a name-value array.

Syntax

DBMS_MGWMSG.NVARRAY_GET (
   p_array    IN SYS.MGW_NAME_VALUE_ARRAY_T,
   p_name     IN VARCHAR2,
   p_compare  IN BINARY_INTEGER DEFAULT CASE_SENSITIVE )
RETURN SYS.MGW_NAME_VALUE_T;

Parameters

Table 52-23  NVARRAY_GET Function Parameters

Parameter	Description
p_array	The name-value array
p_name	The value name
p_compare	Name comparison method. Values are CASE_SENSITIVE and CASE_INSENSITIVE.

Return Values

Returns the matching element, or NULL if the specified name is not found.

---

NVARRAY_GET_BOOLEAN Function

This function gets the value of the name-value array element that you specify in p_name and with the BOOLEAN_VALUE value type.

Syntax

DBMS_MGWMSG.NVARRAY_GET_BOOLEAN (
   p_array    IN SYS.MGW_NAME_VALUE_ARRAY_T,
   p_name     IN VARCHAR2,
   p_compare  IN BINARY_INTEGER DEFAULT CASE_SENSITIVE )
RETURN INTEGER;

Parameters

Table 52-24  NVARRAY_GET_BOOLEAN Function Parameters

Parameter	Description
p_array	The name-value array
p_name	The value name
p_compare	Name comparison method. Values are CASE_SENSITIVE and CASE_INSENSITIVE.

Return Values

Returns the value, or NULL if either the specified name is not found or a type mismatch exists.

---

NVARRAY_GET_BYTE Function

This function gets the value of the name-value array element that you specify in p_name and with the BYTE_VALUE value type.

Syntax

DBMS_MGWMSG.NVARRAY_GET_BYTE (
   p_array    IN SYS.MGW_NAME_VALUE_ARRAY_T,
   p_name     IN VARCHAR2,
   p_compare  IN BINARY_INTEGER DEFAULT CASE_SENSITIVE )
RETURN INTEGER;

Parameters

Table 52-25  NVARRAY_GET_BYTE Function

Parameter	Description
p_array	The name-value array
p_name	The value name
p_compare	Name comparison method. Values are CASE_SENSITIVE and CASE_INSENSITIVE.

Return Values

Returns the value, or NULL if either the specified name is not found or a type mismatch exists.

---

NVARRAY_GET_SHORT Function

This function gets the value of the name-value array element that you specify in p_name and with the SHORT_VALUE value type.

Syntax

DBMS_MGWMSG.NVARRAY_GET_SHORT (
   p_array    IN SYS.MGW_NAME_VALUE_ARRAY_T,
   p_name     IN VARCHAR2,
   p_compare  IN BINARY_INTEGER DEFAULT CASE_SENSITIVE )
RETURN INTEGER;

Parameters

Table 52-26  NVARRAY_GET_SHORT Function Parameters

Parameter	Description
p_array	The name-value array
p_name	The value name
p_compare	Name comparison method. Values are CASE_SENSITIVE and CASE_INSENSITIVE.

Return Values

Returns the value, or NULL if either the specified name is not found or a type mismatch exists.

---

NVARRAY_GET_INTEGER Function

This function gets the value of the name-value array element that you specify in p_name and with the INTEGER_VALUE value type.

Syntax

DBMS_MGWMSG.NVARRAY_GET_INTEGER (
   p_array    IN SYS.MGW_NAME_VALUE_ARRAY_T, 
   p_name     IN VARCHAR2,
   p_compare  IN BINARY_INTEGER DEFAULT CASE_SENSITIVE )  
RETURN INTEGER;

Parameters

Table 52-27  NVARRAY_GET_INTEGER Function Parameters

Parameter	Description
p_array	The name-value array
p_name	The value name
p_compare	Name comparison method. Values are CASE_SENSITIVE and CASE_INSENSITIVE.

Return Values

Returns the value, or NULL if either the specified name is not found or a type mismatch exists.

---

NVARRAY_GET_LONG Function

This function gets the value of the name-value array element that you specify in p_name and with the LONG_VALUE value type.

Syntax

DBMS_MGWMSG.NVARRAY_GET_LONG (
   p_array    IN SYS.MGW_NAME_VALUE_ARRAY_T,
   p_name     IN VARCHAR2,
   p_compare  IN BINARY_INTEGER DEFAULT CASE_SENSITIVE )
RETURN NUMBER;

Parameters

Table 52-28  NVARRAY_GET_LONG Function Parameters

Parameter	Description
p_array	The name-value array
p_name	The value name
p_compare	Name comparison method. Values are CASE_SENSITIVE and CASE_INSENSITIVE.

Return Values

Returns the value, or NULL if either the specified name is not found or a type mismatch exists.

---

NVARRAY_GET_FLOAT Function

This function gets the value of the name-value array element that you specify in p_name and with the FLOAT_VALUE value type.

Syntax

DBMS_MGWMSG.NVARRAY_GET_FLOAT (
   p_array    IN SYS.MGW_NAME_VALUE_ARRAY_T,
   p_name     IN VARCHAR2,
   p_compare  IN BINARY_INTEGER DEFAULT CASE_SENSITIVE )
RETURN NUMBER;

Parameters

Table 52-29  NVARRAY_GET_FLOAT Function Parameters

Parameter	Description
p_array	The name-value array
p_name	The value name
p_compare	Name comparison method. Values are CASE_SENSITIVE and CASE_INSENSITIVE.

Return Values

Returns the value, or NULL if either the specified name is not found or a type mismatch exists.

---

NVARRAY_GET_DOUBLE Function

This function gets the value of the name-value array element that you specify in p_name and with the DOUBLE_VALUE value type.

Syntax

DBMS_MGWMSG.NVARRAY_GET_DOUBLE (
   p_array    IN SYS.MGW_NAME_VALUE_ARRAY_T,
   p_name     IN VARCHAR2,
   p_compare  IN BINARY_INTEGER DEFAULT CASE_SENSITIVE )
RETURN NUMBER;

Parameters

Table 52-30  NVARRAY_GET_DOUBLE Function Parameters

Parameter	Description
p_array	The name-value array
p_name	The value name
p_compare	Name comparison method. Values are CASE_SENSITIVE and CASE_INSENSITIVE.

Return Values

Returns the value, or NULL if either the specified name is not found or a type mismatch exists.

---

NVARRAY_GET_TEXT Function

This function gets the value of the name-value array element that you specify in p_name and with the TEXT_VALUE value type.

Syntax

DBMS_MGWMSG.NVARRAY_GET_TEXT (
   p_array    IN SYS.MGW_NAME_VALUE_ARRAY_T,
   p_name     IN VARCHAR2,
   p_compare  IN BINARY_INTEGER DEFAULT CASE_SENSITIVE )
RETURN VARCHAR2;

Parameters

Table 52-31  NVARRAY_GET_TEXT Function Parameters

Parameter	Description
p_array	The name-value array
p_name	The value name
p_compare	Name comparison method. Values are CASE_SENSITIVE and CASE_INSENSITIVE.

Return Values

Returns the value, or NULL if either the specified name is not found or a type mismatch exists.

---

NVARRAY_GET_RAW Function

This function gets the value of the name-value array element that you specify in p_name and with the RAW_VALUE value type.

Syntax

DBMS_MGWMSG.NVARRAY_GET_RAW (
   p_array    IN SYS.MGW_NAME_VALUE_ARRAY_T,
   p_name     IN VARCHAR2,
   p_compare  IN BINARY_INTEGER DEFAULT CASE_SENSITIVE )
RETURN RAW;

Parameters

Table 52-32  NVARRAY_GET_RAW Function Parameters

Parameter	Description
p_array	The name-value array
p_name	The value name
p_compare	Name comparison method. Values are CASE_SENSITIVE and CASE_INSENSITIVE.

Return Values

Returns the value, or NULL if either the specified name is not found or a type mismatch exists.

---

NVARRAY_GET_DATE Function

This function gets the value of the name-value array element that you specify in p_name and with the DATE_VALUE value type.

Syntax

DBMS_MGWMSG.NVARRAY_GET_DATE (
   p_array    IN SYS.MGW_NAME_VALUE_ARRAY_T,
   p_name     IN VARCHAR2,
   p_compare  IN BINARY_INTEGER DEFAULT CASE_SENSITIVE )
RETURN DATE;

Parameters

Table 52-33  NVARRAY_GET_DATE Function Parameters

Parameters	Description
p_array	The name-value array
p_name	The value name
p_compare	Name comparison method. Values are CASE_SENSITIVE and CASE_INSENSITIVE.

Return Values

Returns the value, or NULL if either the specified name is not found or a type mismatch exists.

---

NVARRAY_FIND_NAME Function

This function searches a name-value array for the element with the name you specify in p_name.

Syntax

DBMS_MGWMSG.NVARRAY_FIND_NAME (
   p_array    IN SYS.MGW_NAME_VALUE_ARRAY_T,
   p_name     IN VARCHAR2,
   p_compare  IN BINARY_INTEGER DEFAULT CASE_SENSITIVE )
RETURN BINARY_INTEGER;

Parameters

Table 52-34  NVARRAY_FIND_NAME Function Parameters

Parameters	Description
p_array	The name-value array to search
p_name	The name to find
p_compare	Name comparison method. Values are CASE_SENSITIVE and CASE_INSENSITIVE.

Return Values

Returns a positive integer that is the array index of the matching element or zero (0) if the specified name is not found.

---

NVARRAY_FIND_NAME_TYPE Function

This function searches a name-value array for an element with the name and value type you specify.

Syntax

DBMS_MGWMSG.NVARRAY_FIND_NAME_TYPE (
   p_array    IN SYS.MGW_NAME_VALUE_ARRAY_T,
   p_name     IN VARCHAR2,
   p_type     IN BINARY_INTEGER
   p_compare  IN BINARY_INTEGER DEFAULT CASE_SENSITIVE )
RETURN BINARY_INTEGER;

Parameters

Table 52-35  NVARRAY_FIND_NAME_TYPE Function Parameters

Parameter	Description
p_array	The name-value array to search
p_name	The name to find
p_type	The value type. Refer to the value type constants in Table 52-1 .
p_compare	Name comparison method. Values are CASE_SENSITIVE and CASE_INSENSITIVE.

Return Values

Returns a positive integer that is the array index of the matching element, zero (0) if the specified name is not found, or negative one (-1) if the specified name is found but a type mismatch exists.