ROR_SCAN_INFO Struct Reference

#include <rowid_ordered_retrieval_plan.h>

Public Attributes
uint	idx
uint	keynr
ha_rows	records
	estimate of # records this scan will return More...
SEL_ROOT *	sel_root
	Set of intervals over key fields that will be used for row retrieval. More...
MY_BITMAP	covered_fields
	Fields used in the query and covered by this ROR scan. More...
MY_BITMAP	covered_fields_remaining
	Fields used in the query that are a) covered by this ROR scan and b) not already covered by ROR scans ordered earlier in the merge sequence. More...
uint	num_covered_fields_remaining
	Number of fields in covered_fields_remaining (caching of bitmap_bits_set()) More...
Cost_estimate	index_read_cost
	Cost of reading all index records with values in sel_arg intervals set (assuming there is no need to access full table records) More...
Bounds_checked_array< QUICK_RANGE * >	ranges
	The ranges to scan for this index. More...
uint	used_key_parts

Member Data Documentation

covered_fields

MY_BITMAP ROR_SCAN_INFO::covered_fields

Fields used in the query and covered by this ROR scan.

covered_fields_remaining

MY_BITMAP ROR_SCAN_INFO::covered_fields_remaining

Fields used in the query that are a) covered by this ROR scan and b) not already covered by ROR scans ordered earlier in the merge sequence.

idx

uint ROR_SCAN_INFO::idx

of used key in param->keys

index_read_cost

Cost_estimate ROR_SCAN_INFO::index_read_cost

Cost of reading all index records with values in sel_arg intervals set (assuming there is no need to access full table records)

keynr

uint ROR_SCAN_INFO::keynr

of used key in table

num_covered_fields_remaining

uint ROR_SCAN_INFO::num_covered_fields_remaining

Number of fields in covered_fields_remaining (caching of bitmap_bits_set())

ranges

Bounds_checked_array<QUICK_RANGE *> ROR_SCAN_INFO::ranges

The ranges to scan for this index.

Must be allocated on the return_mem_root.

records

ha_rows ROR_SCAN_INFO::records

estimate of # records this scan will return

sel_root

SEL_ROOT* ROR_SCAN_INFO::sel_root

Set of intervals over key fields that will be used for row retrieval.

used_key_parts

uint ROR_SCAN_INFO::used_key_parts

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The documentation for this struct was generated from the following file:

• sql/range_optimizer/rowid_ordered_retrieval_plan.h