Re: XML ouput for psql - Mailing list pgsql-patches

I assume we are not moving in the XML/psql direction, right?  We want it
int he backend, or the psql HTML converted to XHTML?

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greg@turnstep.com wrote:
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> Patch to add XML output to psql:
>
> http://www.gtsm.com/xml.patch.txt
>
> Notes and questions:
>
> The basic output looks something like this:
>
> <?xml version="1.0" encoding="SQL_ASCII"?>
> <resultset psql_version="7.4devel" query="select * from foo;">
>
> <columns>
>   <col num="1">a</col>
>   <col num="2">b</col>
>   <col num="3">c</col>
>   <col num="4">mucho nacho  </col>
> </columns>
> <row num="1">
>   <a>1</a>
>   <b>pizza</b>
>   <c>2003-02-25 15:19:22.169797</c>
>   <"mucho nacho  "></"mucho nacho  ">
> </row>
> <row num="2">
>   <a>2</a>
>   <b>mushroom</b>
>   <c>2003-02-25 15:19:26.969415</c>
>   <"mucho nacho  "></"mucho nacho  ">
> </row>
> <footer>(2 rows)</footer>
> </resultset>
>
> and with the \x option:
>
> <?xml version="1.0" encoding="SQL_ASCII"?>
> <resultset psql_version="7.4devel" query="select * from foo;">
>
> <columns>
>   <col num="1">a</col>
>   <col num="2">b</col>
>   <col num="3">c</col>
>   <col num="4">mucho nacho  </col>
> </columns>
> <row num="1">
>   <cell name="a">1</cell>
>   <cell name="b">pizza</cell>
>   <cell name="c">2003-02-25 15:19:22.169797</cell>
>   <cell name="mucho nacho  "></cell>
> </row>
> <row num="2">
>   <cell name="a">2</cell>
>   <cell name="b">mushroom</cell>
>   <cell name="c">2003-02-25 15:19:26.969415</cell>
>   <cell name="mucho nacho  "></cell>
> </row>
> </resultset>
>
>
> The default encoding "SQL-ASCII" is not valid for XML.
> Should it be automatically changed to something else?
>
> The flag "-X" is already taken, unfortunately, although \X is not.
> I used "-L" and "\L" but they are not as memorable as "X". Anyone
> see a way around this? Can we still use \X inside of psql?
>
>
> It would be nice to include the string representation of the column
> types in the xml output:
> <col type="int8">foo</col>
> ....but I could not find an easy way to do this: PQftype returns the
> OID only (which is close but not quite there). Is there an
> existing way to get the name of the type of a column from a
> PQresult item?
>
> The HTML, XML, and Latex modes should have better documentation -
> I'll submit a separate doc patch when/if this gets finalized.
>
>
> - --
> Greg Sabino Mullane greg@turnstep.com
> PGP Key: 0x14964AC8 200302261518
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