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Name Rules Staging Area

281 bytes added, 11:46, 7 July 2015
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When creating Custom Defined Fields (CDFs) in IMSMA, a name (and label) must be specified. Rules related to the CDF name and its uniqueness are applied in IMSMA and need to be considered when generating a staging area. In {{IMSMANG}} database the rule is unique name per data type '''and''' item. In version 5.x it was not possible to specify name when creating Custom Defined Fields (CDFs). It was only possible to specify the label which then also was set as name. Therefore there are CDFs with names like ''If the answer is No on question 14.1 then fill in the Comment field Medical and Physio'' or ''Specify''.
In version 6.0 it is possible to set the CDF's name '''and''' the name must be according to PostgreSQL rules. The name should be no longer than 60 characters and should only contain ''a - z'' and ''0 - 9'', see full rules on [[Add Custom Defined Fields]]. '''But''' CDFs created with version 5.x do not follow these rules so they may be up 250 characters long and contain any character (\ ? é ô . space). They may also be written with another alphabet e.g. Arabic.
In {{IMSMANG}} the CDF name is contents of a database column but in the Staging area database it will be used as column name which of cause course must be according to PostgreSQL rules. The Staging Area Generator handles CDF names that do not follow the rules:
* any name longer than '''63''' characters will be cut off
* any not supported character will be replaced with underscore including trailing spaces
'' Geospatial part creation error caused by duplicate CDF names according to SAG geospatial rules''
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There are cases where the Staging Area Generator cannot handle the duplicates. The table below illustrates the behavior with some examples.
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