Olivier Favre 4d68d3d053 Provide more context variables in update scripts
In addition to `_source`, the following variables are available through
the `ctx` map: `_index`, `_type`, `_id`, `_version`, `_routing`,
`_parent`, `_timestamp`, `_ttl`.

Some of these fields are more useful still within the context of an
Update By Query, see #1607, #2230, #2231.
2014-11-14 10:14:39 +01:00
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2014-11-08 13:55:23 +01:00