A Little Noise

January 29, 2010

mysql’s --xml and some XSLT (now with JSON!)

Filed under: MySQL FAQ — snoyes @ 12:12 pm

Somebody asked in Freenode the other day how to get their data out of MySQL into a specific XML format.

Both mysqldump and the mysql client have --xml options. The output from the cli looks like this:

<resultset statement="SELECT here">
    <field name="field1">value a</field>
    <field name="field2">value b</field>
    <field name="field1">value c</field>
    <field name="field2">value d</field>

I wanted to change those <field name=”fieldName”> into <fieldName> tags, and all it takes is a little XSLT, which I’ve uploaded here.

An XSLT processor lets you do something like this:

mysql --xml -e "SELECT here" | xsltproc mysql.xsl -

The result will be something like:

<resultset statement="SELECT here">
    <field1>value a</field1>
    <field2>value b</field2>
    <field1>value c</field1>
    <field2>value d</field2>

If JSON is your thing, you can use xml2json to take that output a step farther:

mysql --xml -e "SELECT here" | xsltproc mysql.xsl - | xsltproc xml2json.xsl -

Result (whitespace added):

{"resultset" : 
    "statement" : "SELECT here", 
    "row" : [
      {"field1" : "value a", "field2" : "value b"},
      {"field1" : "value c", "field2" : "value d"}

That will suffice until the mysql client has a –json parameter.

1 Comment »

  1. […] via A Little Noise » Blog Archive » mysql’s –xml and some XSLT. […]

    Pingback by WhirCat · A Little Noise » Blog Archive » mysql’s –xml and some XSLT — January 30, 2010 @ 11:13 am

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