Sergey Glukhov 3fa2673f19 Bug#39955 SELECT on INFORMATION_SCHEMA.GLOBAL_VARIABLES takes too long ...

VARIABLE_VALUE field is decreased to 1024 symbols.
(affected I_S tables: GLOBAL_VARIABLES, SESSION_VARIABLES,
 GLOBAL_STATUS, SESSION_STATUS).
The only variable which can be longer than 1024 is
init_connect. The variable will be truncated with warning.
Additional fix:
Added where condition filter which speed up queries which
have where condition with expressions which use VARIABLE_NAME
field.

2008-11-13 16:09:11 +04:00

42 KiB

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