TAP-1_0-Err-1 < IVOA

IVOA Web>IvoaDAL>TableAccess>TAP-1_0-Errata>TAP-1_0-Err-1 (2017-06-06, MarcoMolinaro) (raw view)

---+ TAP-1.0 Erratum 1: UPLOAD Table Names

Author: DAL WG

Date last changed: 2014-12-22

Date accepted: 2017-05-14

---++ Rationale

Section 2.5 of [[http://www.ivoa.net/documents/TAP/20100327/index.html][TAP-1.0]] requires the name of the uploaded tables to be a
<dl>
  <dd>... legal ADQL table name with no catalog or schema (e.g. an unqualified table name)</dd>
</dl>
This may allow [[http://www.ivoa.net/documents/cover/ADQL-20081030.html][ADQL-2.0]] =delimited_identifiers= to be used for uploaded tables as the ADQL =table_name= expands to either =regular_identifiers= or =delimited_identifiers=. This, however, was clearly not the intention of the text, as the use of =delimited_identifiers= is not (fully) supported by the syntax of the UPLOAD parameter (see §2.5.1 in TAP-1.0), i.e.
<pre>
UPLOAD=table_a,http://host_a/path;table_b,http://host_b/path
</pre>
To clarify this issue, the proposal has been made to replace the text within parenthesis in the above quoted excerpt of TAP-1.0 to allow in the UPLOAD parameter only table names as strings following the =regular_identifier= ADQL syntax.

---++ Erratum Content

The TAP-1.0 recommendation states, for the table upload mechanism (see §2.5 of TAP-1.0), that
<dl>
  <dd>The client specifies the name of the uploaded table; this name must be a legal ADQL table name with no
catalog or schema (e.g. an unqualified table name).</dd>
</dl>
The parenthetical exemplification may allow any ADQL-2.0 =identifier= to be used as a string in the UPLOAD parameter posted to the TAP service accepting uploads, including =delimited_identifier= ones that the UPLOAD parameter syntax doesn't support.

This Erratum updates the TAP-1.0 recommendation amending the third sentence in the first paragraph of §2.5 of that document by substituting it with the following:
<dl>
  <dd>The client specifies the name of the uploaded table; this name must be a legal ADQL table name with no catalog or schema (*i.e. a string following the =regular_identifier= production of the ADQL-2.0 standard*).</dd>
</dl>

---++ Impact Assessment

This Erratum emendation could, in theory, invalidate existing clients that might want to use =delimited_identifiers= in uploads. Due to the difficulties with the UPLOAD parameter syntax, however, that would not really be supported in TAP-1.0, either. This solution, thus, clarifies the TAP-1.0 document and will be maintained in the next minor version of the protocol itself.

---++ Note

This Erratum was previously part of the !TAP1Err1 Note still available on [[http://volute.g-vo.org/svn/trunk/projects/dal/TAP1Err1/][volute]]. The content reflects §2 of that Note at svn revision 2800.

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Topic revision: r3 - 2017-06-06 - MarcoMolinaro

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