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Fix number of rows passing in case of EQ_REF

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Oleksandr Byelkin
2023-01-30 11:49:42 +01:00
parent 9c6fcdb85e
commit c8f2e9a5c0
1 changed files with 5 additions and 3 deletions
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8
sql/sql_select.cc
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@@ -7557,6 +7557,7 @@ best_access_path(JOIN *join,
rec= MATCHING_ROWS_IN_OTHER_TABLE; // Fix for small tables rec= MATCHING_ROWS_IN_OTHER_TABLE; // Fix for small tables
Json_writer_object trace_access_idx(thd); Json_writer_object trace_access_idx(thd);
double eq_ref_rows= 0;
/* /*
full text keys require special treatment full text keys require special treatment
*/ */
@@ -7595,7 +7596,8 @@ best_access_path(JOIN *join,
type= JT_EQ_REF; type= JT_EQ_REF;
trace_access_idx.add("access_type", join_type_str[type]) trace_access_idx.add("access_type", join_type_str[type])
.add("index", keyinfo->name); .add("index", keyinfo->name);
tmp = prev_record_reads(join_positions, idx, found_ref); eq_ref_rows= tmp = prev_record_reads(join_positions, idx,
found_ref);
records=1.0; records=1.0;
} }
else else
@@ -7918,8 +7920,8 @@ best_access_path(JOIN *join,
Set the effective number of rows from "tmp" here. Set the effective number of rows from "tmp" here.
*/ */
keyread_tmp= tmp/ 2; keyread_tmp= COST_ADD(eq_ref_rows / 2, s->startup_cost);
rows= tmp; rows= eq_ref_rows;
} }
else else
rows= record_count * records; rows= record_count * records;