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The "DataImportHandler" page has been changed by JamesDyer: http://wiki.apache.org/solr/DataImportHandler?action=diff&rev1=323&rev2=324 Comment: SOLR-3850: cacheKey/cacheLookup In the where the lhs (the part before '=') is the column in y and the rhs (the part after '=') is the value to be computed for looking up the cache. + An alternate syntax to Example 2 above uses the "cacheKey" and "cacheLookup" parameters: + {{{ + <entity name="x" query="select * from x"> + <entity name="y" query="select * from y" processor="CachedSqlEntityProcessor" cacheKey="xid" cacheLookup="x.id"> + </entity> + <entity> + }}} + /!\ In Solr 3.6, 3.6.1, 4.0-Alpha & 4.0-Beta, the "cacheKey" parameter was re-named "cachePk". This is renamed back for 4.0 (& 3.6.2, if released). See [[https://issues.apache.org/jira/browse/SOLR-3850|SOLR-3850]] + ---- For more caching options with DIH see [[https://issues.apache.org/jira/browse/SOLR-2382|SOLR-2382]]. These additional options include: using caches with non-sql entities, pluggable cache implementations, persistent caches, writing DIH output to a cache rather than directly to solr, using a previously-created cache as a DIH entity's input & delta updates on cached data. Some of these features are currently available [[Solr3.6]] [[Solr4.0]]
