[server/session] add missing rollback when freeing a db connection When we let go of a cnxset and give it back to the pool, we need to make sure it's not in the middle of a transaction. We got bitten by a migration where the connection used by admin's repo.connect was not rolled back before attempting the migration, causing a deadlock because it had a lock on a table. This could potentially also be an issue for e.g. hooks or looping tasks that didn't explicitly rollback before calling free_cnxset or moving out of a ensure_cnx_set block.

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.. winclude:: search_sample_queries

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You can as well type complex queries using the RQL_ query language, 

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used every where to build dynamic pages of this site.

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You can use one of the following prefixes to specify which kind of search you

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want: 

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* `rql` : RQL query

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* `text` : full text search

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.. _RQL: doc/tut_rql