Data Translation Rules

2.3.2 Data Translation Rules

The following table lists the data translation rules that TMA TCP gateway follows.

Table 2-2 Data Translation Rules

Field Type	Translation Rules
`CARRAY`	Passed untranslated as sequences of bytes
`STRING` and `CHAR`	Translated from ASCII to EBCDIC (if needed)
`SHORT`	Translated to S9(4) COMP
`LONG`	Translated to S9(9) COMP
`FLOAT`	Translated to COMP-1
`DOUBLE`	Translated to COMP-2

Note:

Oracle Tuxedo provides a field type named dec_t that supports decimal values within VIEWs. The TMA TCP gateway product translates these fields into machine independent representations of packed decimals. For example, dec_t(m,n) becomes S9(2*m-(n+1))V9(n) COMP-3. Therefore, a decimal field with a size of 8,5 corresponds to S9(10)V9(5) COMP-3.

The following table summarizes the translation rules between C and IBM/370 data types.

Table 2-3 Translation Rules Between C and IBM/370 Data Types

Remote Data Type	Description	View Field Type/Length
`PIC X(n)`	Alpha-numeric Characters	string / n
`PIC X`	Single Alpha-numeric Character	char
`PIC X(n)`	Raw Bytes	carray / n
`PIC X`	Single Numeric Byte	carray / 1
`PIC S9(4) COMP`	16-bit Integer	short
`PIC S9(9) COMP`	32-bit Integer	long
`COMP-1`	Single-precision Floating Point	float
`COMP-2`	Double-precision Floating Point	double
`PIC` `S9((m+(n+1))/2)V9` `(n)` `COMP-3`	Packed Decimal	dec_t / m,n

Parent topic: Translating Data with TMA TCP gateway