st_ror_scan_info Struct Reference

List of all members.

Public Attributes
uint	idx
	# of used key in param->keys
uint	keynr
	# of used key in table
ha_rows	records
	estimate of # records this scan will return
SEL_ARG *	sel_arg
MY_BITMAP	covered_fields
MY_BITMAP	covered_fields_remaining
uint	num_covered_fields_remaining
double	index_read_cost

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Member Data Documentation

MY_BITMAP st_ror_scan_info::covered_fields

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

MY_BITMAP st_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.

double st_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)

uint st_ror_scan_info::num_covered_fields_remaining

#fields in covered_fields_remaining (caching of bitmap_bits_set())

SEL_ARG* st_ror_scan_info::sel_arg

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

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

• opt_range.cc