15 lines
829 B
Plaintext
15 lines
829 B
Plaintext
=== on 14 Mar 2014, 15:38:39 Dinesh Bolkensteyn wrote:
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A table check is a "CHECK" constraint applied to several columns, hence it is an "out of line" one.
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=== on 14 Mar 2014, 15:41:13 Dinesh Bolkensteyn wrote:
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I guess that an alternate key is a "UNIQUE" constraint applied to several columns, but this sounds less obvious.
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=== on 14 Mar 2014, 15:48:38 Dinesh Bolkensteyn wrote:
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I suggest to get started with conventions on those 5 types of constraints: null, unique, primary key, check, and foreign key.
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The "sub-categories" (such as "range check", "alternate key", "table check") are not straightforward to clearly define.
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=== on 6 May 2014, 11:36:45 Ann Campbell wrote:
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You cannot create TABLE within ABAP code, and therefore you cannot create constraints on a table. Therefore, this rule is not relevant in ABAP context.
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