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[RFC] Ops suggested modifications #92

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merged 6 commits into from
Aug 8, 2023
Merged

[RFC] Ops suggested modifications #92

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3a0554e
Add `IN` into available search conditions
gmantele Jul 25, 2023
b97051c
`ivo_` prefix can be defined with EN too
gmantele Jul 25, 2023
87dc48a
Add ref. to type system in UDF definition
gmantele Jul 25, 2023
80961d3
Join duplicated set operators explanations
gmantele Jul 26, 2023
1f5a2a8
Fix layout of ADQL examples + Fix few errors
gmantele Aug 8, 2023
5329352
Fix typo (useless comma in POLYGON arguments)
gmantele Aug 8, 2023
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37 changes: 20 additions & 17 deletions ADQL.tex
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Original file line number Diff line number Diff line change
Expand Up @@ -565,10 +565,11 @@ \subsubsection{Search condition}

\begin{itemize}
\item Standard comparison operators: \verb:=:, \verb:!=:, \verb:<>:, \verb:<:, \verb:>:, \verb:<=:, \verb:>=:
\item Range comparison, \verb:BETWEEN:
\item Case-sensitive string comparison, \verb:LIKE:
\item Null value checks, \verb:IS NULL: and \verb:IS NOT NULL:
\item Non-empty subquery check, \verb:EXISTS:
\item Range comparison: \verb:BETWEEN:
\item Membership check: \verb:IN:
\item Case-sensitive string comparison: \verb:LIKE:
\item Null value checks: \verb:IS NULL:, \verb:IS NOT NULL:
\item Non-empty subquery check: \verb:EXISTS:
\end{itemize}

In addition, some service implementations may also support the optional \verb:ILIKE:
Expand Down Expand Up @@ -2511,9 +2512,9 @@ \subsubsection{Overview}
gavo_convert()
\end{verbatim}

The \verb:ivo: prefix is reserved for functions that have been defined
in an IVOA specification. For example the \RegTAPSpec{} defines the following
functions:
The \verb:ivo: prefix is reserved for functions that have been defined in an
IVOA specification or Endorsed Note. For example the \CatalogueUDF{} defines the
following functions:
\begin{verbatim}
ivo_nocasematch()
ivo_hasword()
Expand Down Expand Up @@ -2551,19 +2552,21 @@ \subsubsection{Metadata}
arg ::= <regular_identifier> <type_name>
\end{verbatim}

\verb:<type_name>: should be one of the terms defined in \SectionRef{sec:types}.

For example, the following fragment declares a user defined function that
takes two \verb:TEXT: parameters and returns an integer, zero or one,
takes two string parameters and returns an integer, zero or one,
depending on the regular expression pattern matching:
\begin{verbatim}
<languageFeatures type="ivo://ivoa.net/std/tapregext#features-udf">
<feature>
<form>match(pattern TEXT, string TEXT) -> INTEGER</form>
<description>
match returns 1 if the POSIX regular expression pattern
matches anything in string, 0 otherwise.
</description>
</feature>
</languageFeatures>
<languageFeatures type="ivo://ivoa.net/std/tapregext#features-udf">
<feature>
<form>match(pattern VARCHAR, string VARCHAR) -> INTEGER</form>
<description>
match returns 1 if the POSIX regular expression pattern
matches anything in string, 0 otherwise.
</description>
</feature>
</languageFeatures>
\end{verbatim}

See the \TAPRegSpec{} for full details on how to use the
Expand Down