git-svn-id: file:///svn/mysql/tokudb-engine/src@3508 c7de825b-a66e-492c-adef-691d508d4ae1

put comments above public function declaring what their behavior, parameters
and possible return values

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Save comparison function in handlerton
Currently supports all pure integer types



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show engine tokudb logs always reports nothing.  the tokudb log_archhive function always returns EINVAL since it does not support flags!=0.  set log_archive flags=0 for tokudb to avoid EINVAL return.  addresses #697



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dereferencing value in debug statement that could be NULL
this fixes it.

git-svn-id: file:///svn/mysql/tokudb-engine/src@3276 c7de825b-a66e-492c-adef-691d508d4ae1

Updated ha_tokudb::index_read and comparison functions based on code review.
Also put in some (very informal) comments about how index_read is supposed to work.

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fix the EDOM errors by makeing the key compare function implement a total order on the key space (including key prefixes), and using DB_SET_RANGE in place of DB_SET for cursor operations.  closes #576 closes #587



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file->offset(addr) were assuming addr was within the field's record, which is not always the case.  closes #592

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from the last auto increment number.  this makes insertions of multiple rows
work.



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implement auto increment for primary keys in which the first field is the auto increment field. addresses #541

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tokudb does not implement the DB_RMW cursor get flag.  updates were gettting EINVAL fromthe storage engine. tokudb turns read locks into write locks when required, to the flag is just an optimization.  we plan on replacing the affected code with the tokudb delete both method in the future.



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