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Don't count NULL values in cardinalty for MyISAM tables.

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Free row buffer cache after each query for MyISAM tables.
Added table join option FORCE INDEX
Fixed core dump bug when connecting with hostname that could not be resolved.


include/my_base.h:
  Don't count NULL values in cardinalty
myisam/mi_check.c:
  Don't count NULL values in cardinalty
myisam/mi_extra.c:
  Free row buffer cache after each query
myisam/mi_open.c:
  Avoid realloc if cache size doesn't change
myisam/mi_search.c:
  Don't count NULL values in cardinalty
myisam/myisamdef.h:
  Change buffer length from uint to uint32 to make it more portable/predictable
mysql-test/r/myisam.result:
  Test case for cardinality with NULL keys and FORCE INDEX
mysql-test/t/myisam.test:
  Test case for cardinality with NULL keys and FORCE INDEX
sql/lex.h:
  Added table join option FORCE INDEX
sql/mysql_priv.h:
  Added table join option FORCE INDEX
sql/opt_range.cc:
  Added table join option FORCE INDEX
sql/sql_base.cc:
  Added table join option FORCE INDEX
sql/sql_lex.h:
  Added table join option FORCE INDEX
sql/sql_parse.cc:
  Added table join option FORCE INDEX
  Don't use strlen() on hostname without first checking if it's not NULL
sql/sql_select.cc:
  Added table join option FORCE INDEX
sql/sql_yacc.yy:
  Added table join option FORCE INDEX
sql/table.h:
  Added table join option FORCE INDEX
This commit is contained in:
unknown
2003-01-09 02:19:14 +02:00
parent a3f4a46bf2
commit b5e37b242e
17 changed files with 207 additions and 52 deletions
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4
sql/opt_range.cc
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@@ -605,12 +605,14 @@ int SQL_SELECT::test_quick_select(key_map keys_to_use, table_map prev_tables,
records++; /* purecov: inspected */
scan_time=(double) records / TIME_FOR_COMPARE+1;
read_time=(double) head->file->scan_time()+ scan_time + 1.0;
if (head->force_index)
scan_time= read_time= DBL_MAX;
if (limit < records)
read_time=(double) records+scan_time+1; // Force to use index
else if (read_time <= 2.0 && !force_quick_range)
DBUG_RETURN(0); /* No need for quick select */
DBUG_PRINT("info",("Time to scan table: %ld",(long) read_time));
DBUG_PRINT("info",("Time to scan table: %g", read_time));
keys_to_use&=head->keys_in_use_for_query;
if (keys_to_use)