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From "Rick Hillegas (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DERBY-5822) Document the new SQL standard behavior of the SPACE_TABLE vti
Date Tue, 19 Jun 2012 17:42:43 GMT
Rick Hillegas created DERBY-5822:
------------------------------------

             Summary: Document the new SQL standard behavior of the SPACE_TABLE vti
                 Key: DERBY-5822
                 URL: https://issues.apache.org/jira/browse/DERBY-5822
             Project: Derby
          Issue Type: Bug
          Components: Documentation
    Affects Versions: 10.10.0.0
            Reporter: Rick Hillegas


We will want to improve the Reference Guide section on the SPACE_TABLE vti after we commit
the derby-5554-02-aa-0argConstructor.diff attached to DERBY-5554. We will want to make the
following changes:

1) Describe the new TABLEID column which was added to SPACE_TABLE:

Column Name: TABLEID
Type: CHAR
Length: 36
Nullable: False
Contents: The id of the table which the conglomerate belongs to.


2) Describe the additional no-arg constructor for this vti. There are now 3 ways to construct
this vti:

i) No args. This is the new constructor which needs to be described. When the vti is invoked
with no arguments, it retrieves space information for all tables and indexes in the database.

ii) One argument. This constructor is already described. If the vti is invoked with one string
argument, then that argument is the name of a table in the current schema.

iii) Two arguments. This constructor is already described also. When the vti is invoked with
two string arguments, the first argument is a schema name and the second argument is a table
name.


3) Replace the first SPACE_TABLE example. That example uses Derby-specific syntax which falls
outside the SQL Standard. Showcasing non-standard syntax encourages users to try out other
non-standard syntax, giving rise to bugs like DERBY-5554. We should showcase the following
standard syntax instead:

select t2.*
    from
        sys.systables systabs,
        table (syscs_diag.space_table()) as t2
    where systabs.tabletype = 'T'
    and systabs.tableid = t2.tableid;


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