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mdbx: обещанное "doubtless" API для позиционирования курсоров.

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Леонид Юрьев (Leonid Yuriev)
2023-11-13 12:52:17 +03:00
parent 5cf6542fa0
commit 25015c54e1
3 changed files with 336 additions and 99 deletions
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25
mdbx.h
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@@ -1778,7 +1778,7 @@ enum MDBX_cursor_op {
* return both key and data, and the return code depends on whether a
* upper-bound was found.
*
* For non DUPSORT-ed collections this work the same to \ref MDBX_SET_RANGE,
* For non DUPSORT-ed collections this work like \ref MDBX_SET_RANGE,
* but returns \ref MDBX_SUCCESS if the greater key was found or
* \ref MDBX_NOTFOUND otherwise.
*
@@ -1786,7 +1786,28 @@ enum MDBX_cursor_op {
* i.e. for a pairs/tuples of a key and an each data value of duplicates.
* Returns \ref MDBX_SUCCESS if the greater pair was returned or
* \ref MDBX_NOTFOUND otherwise. */
MDBX_SET_UPPERBOUND
MDBX_SET_UPPERBOUND,
/* Doubtless cursor positioning at a specified key. */
MDBX_TO_KEY_LESSER_THAN,
MDBX_TO_KEY_LESSER_OR_EQUAL,
MDBX_TO_KEY_EQUAL,
MDBX_TO_KEY_GREATER_OR_EQUAL,
MDBX_TO_KEY_GREATER_THAN,
/* Doubtless cursor positioning at a specified key-value pair
* for dupsort/multi-value hives. */
MDBX_TO_EXACT_KEY_VALUE_LESSER_THAN,
MDBX_TO_EXACT_KEY_VALUE_LESSER_OR_EQUAL,
MDBX_TO_EXACT_KEY_VALUE_EQUAL,
MDBX_TO_EXACT_KEY_VALUE_GREATER_OR_EQUAL,
MDBX_TO_EXACT_KEY_VALUE_GREATER_THAN,
MDBX_TO_PAIR_LESSER_THAN,
MDBX_TO_PAIR_LESSER_OR_EQUAL,
MDBX_TO_PAIR_EQUAL,
MDBX_TO_PAIR_GREATER_OR_EQUAL,
MDBX_TO_PAIR_GREATER_THAN
};
#ifndef __cplusplus
/** \ingroup c_cursors */