MySQL 9.0.0
Source Code Documentation
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Structure used by AHI to contain information on record prefixes to be considered in hash index subsystem. More...
#include <buf0buf.h>
Public Member Functions | |
bool | equals_without_left_side (const btr_search_prefix_info_t &other) const |
bool | operator== (const btr_search_prefix_info_t &other) const |
bool | operator!= (const btr_search_prefix_info_t &other) const |
Public Attributes | |
uint32_t | n_bytes |
recommended prefix: number of bytes in an incomplete field More... | |
uint16_t | n_fields |
recommended prefix length for hash search: number of full fields More... | |
bool | left_side |
true or false, depending on whether the leftmost record of several records with the same prefix should be indexed in the hash index More... | |
Structure used by AHI to contain information on record prefixes to be considered in hash index subsystem.
It is meant for using as a single 64bit atomic value, thus it needs to be aligned properly.
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bool btr_search_prefix_info_t::left_side |
true or false, depending on whether the leftmost record of several records with the same prefix should be indexed in the hash index
uint32_t btr_search_prefix_info_t::n_bytes |
recommended prefix: number of bytes in an incomplete field
uint16_t btr_search_prefix_info_t::n_fields |
recommended prefix length for hash search: number of full fields