+---------------------------------+
|               CDX               |
+---------------------------------+
CDX(<expN1> [, <expN2> | <expC>])

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Returns names of open .CDX compound indexes.
Return value - Character
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<expN1>
        Number corresponding to index position.  If the database has a
structural index file and <expN1> is 1, the name of the structural index
file (which is always identical to name of the database) is returned.
If <expN1> is 2, the name of the first .CDX compound index file
specified in the INDEX clause of the USE command or in the SET INDEX
command is returned.  If <expN1> is 3, the second .CDX compound index
file name is returned and so on.  If <expN1> is greater than the number
of open .CDX compound index files, the null string is returned.

        If the database does not have a structural index file and <expN1> is 1,
the name of the first .CDX compound index file specified in the INDEX
clause of the USE command or in the SET INDEX command is returned.  If
<expN1> is 2, the second .CDX compound index file name is returned and
so on.  If <expN1> is greater than the number of open .CDX compound
index files, the null string is returned.


<expN2> | <expC>
        Work area number or alias.

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See Also:  INDEX, MDX(), NDX(), SET INDEX, SYS(14) Index expression,
SYS(21) Master index number, SYS(22) Master tag/index name, SYS(2021)
Filtered index expr, TAG(), USE

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