Difference between revisions of "CANDIDATE()"
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==Description== | ==Description== | ||
| − | The CANDIDATE() function is used to determine whether an index tag is a candidate index tag. The number of the index tag to be examined can optionally be specified in <expN1>. If < | + | The CANDIDATE() function is used to determine whether an index tag is a candidate index tag. The number of the index tag to be examined can optionally be specified in <expN1>. If <expN1> is not specified, the CANDIDATE() function will operate on the master index tag of the currently active table. If the tag number, <expN1>, is specified, the CANDIDATE() function can be used on tables other than the currently active table by specifying either the relevant workarea number, <expN2>, or the alias name of the table, <expC>. |
NOTE: A candidate index tag is an index tag that is a likely candidate to become the primary index tag as it does not contain any null or duplicate values. | NOTE: A candidate index tag is an index tag that is a likely candidate to become the primary index tag as it does not contain any null or duplicate values. | ||
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if tagcount() > 0 | if tagcount() > 0 | ||
for i = 1 to tagcount() | for i = 1 to tagcount() | ||
| − | ? "Candidate status for " + tag() + " is " + ltos(candidate(i)) | + | ? "Candidate status for " + tag(i) + " is " + ltos(candidate(i)) |
next | next | ||
endif | endif | ||
Latest revision as of 09:19, 25 June 2019
Purpose
Function to determine whether an index tag is a candidate index tag.
Syntax
CANDIDATE([<expN1>][,<expN2> | <expC>])
See Also
ALIAS(), INDEX, Optimizing Indexes using SYNCNUM, SELECT(), SEQNO(), SYNCNUM, TAG(), TAGCOUNT(), TAGNO(), UNIQUE()
Description
The CANDIDATE() function is used to determine whether an index tag is a candidate index tag. The number of the index tag to be examined can optionally be specified in <expN1>. If <expN1> is not specified, the CANDIDATE() function will operate on the master index tag of the currently active table. If the tag number, <expN1>, is specified, the CANDIDATE() function can be used on tables other than the currently active table by specifying either the relevant workarea number, <expN2>, or the alias name of the table, <expC>.
NOTE: A candidate index tag is an index tag that is a likely candidate to become the primary index tag as it does not contain any null or duplicate values.
Example
if tagcount() > 0 for i = 1 to tagcount() ? "Candidate status for " + tag(i) + " is " + ltos(candidate(i)) next endif
Products
Recital Server, Recital
