remove some comments about position() and rnd_pos() that may have been
inaccurate. Will put in comments once functions are better understood

git-svn-id: file:///svn/mysql/tokudb-engine/src@3650 c7de825b-a66e-492c-adef-691d508d4ae1

add comments to understand how rnd_pos and position relate to each other
and how they work

git-svn-id: file:///svn/mysql/tokudb-engine/src@3638 c7de825b-a66e-492c-adef-691d508d4ae1

comments for pack_row and unpack_key

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should do bzero on byte_stream instead of &byte_stream
only affected in a certain trace mode

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change the auto_increment field filter to only allow the first field in the primary key or the first field in the row if there is no primary key. closes #738

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git-svn-id: file:///svn/mysql/tokudb-engine/src@3568 c7de825b-a66e-492c-adef-691d508d4ae1

get covering index reads to work by supplying the key from the index to the read row function. addresses #705

git-svn-id: file:///svn/mysql/tokudb-engine/src@3559 c7de825b-a66e-492c-adef-691d508d4ae1

add comments for read_row

git-svn-id: file:///svn/mysql/tokudb-engine/src@3543 c7de825b-a66e-492c-adef-691d508d4ae1

add comments for several member variables

git-svn-id: file:///svn/mysql/tokudb-engine/src@3535 c7de825b-a66e-492c-adef-691d508d4ae1

git-svn-id: file:///svn/mysql/tokudb-engine/src@3534 c7de825b-a66e-492c-adef-691d508d4ae1

git-svn-id: file:///svn/mysql/tokudb-engine/src@3526 c7de825b-a66e-492c-adef-691d508d4ae1

allow one to turn transactions, locking, or logging off in the tokudb storage engine for experiments. addresses #460

git-svn-id: file:///svn/mysql/tokudb-engine/src@3512 c7de825b-a66e-492c-adef-691d508d4ae1

add comments to most member variables in ha_tokudb.cc
change initialization of cursor and transaction pointers to NULL instead of 0


git-svn-id: file:///svn/mysql/tokudb-engine/src@3510 c7de825b-a66e-492c-adef-691d508d4ae1

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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

git-svn-id: file:///svn/mysql/tokudb-engine/src@3500 c7de825b-a66e-492c-adef-691d508d4ae1

git-svn-id: file:///svn/mysql/tokudb-engine/src@3491 c7de825b-a66e-492c-adef-691d508d4ae1

git-svn-id: file:///svn/mysql/tokudb-engine/src@3485 c7de825b-a66e-492c-adef-691d508d4ae1

Save comparison function in handlerton
Currently supports all pure integer types



git-svn-id: file:///svn/mysql/tokudb-engine/src@3476 c7de825b-a66e-492c-adef-691d508d4ae1

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git-svn-id: file:///svn/mysql/tokudb-engine/src@3455 c7de825b-a66e-492c-adef-691d508d4ae1

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



git-svn-id: file:///svn/mysql/tokudb-engine/src@3450 c7de825b-a66e-492c-adef-691d508d4ae1

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git-svn-id: file:///svn/mysql/tokudb-engine/src@3282 c7de825b-a66e-492c-adef-691d508d4ae1

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.

git-svn-id: file:///svn/mysql/tokudb-engine/src@3275 c7de825b-a66e-492c-adef-691d508d4ae1

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git-svn-id: file:///svn/mysql/tokudb-engine/src@3243 c7de825b-a66e-492c-adef-691d508d4ae1

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git-svn-id: file:///svn/mysql/tokudb-engine/src@3216 c7de825b-a66e-492c-adef-691d508d4ae1

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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