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restore ha_example::check_if_incompatible_data(), create_info->fields_option_struct,

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create_info->indexes_option_struct lost in the merge.
add test cases.
This commit is contained in:
Sergei Golubchik
2013-07-12 11:36:54 +02:00
parent f4d5dacf43
commit f672d6b7d8
4 changed files with 104 additions and 0 deletions
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83
storage/example/ha_example.cc
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@@ -899,6 +899,89 @@ int ha_example::create(const char *name, TABLE *table_arg,
}
/**
check_if_incompatible_data() called if ALTER TABLE can't detect otherwise
if new and old definition are compatible
@details If there are no other explicit signs like changed number of
fields this function will be called by compare_tables()
(sql/sql_tables.cc) to decide should we rewrite whole table or only .frm
file.
*/
bool ha_example::check_if_incompatible_data(HA_CREATE_INFO *info,
uint table_changes)
{
ha_table_option_struct *param_old, *param_new;
DBUG_ENTER("ha_example::check_if_incompatible_data");
/*
This example shows how custom engine specific table and field
options can be accessed from this function to be compared.
*/
param_new= info->option_struct;
DBUG_PRINT("info", ("new strparam: '%-.64s' ullparam: %llu enumparam: %u "
"boolparam: %u",
(param_new->strparam ? param_new->strparam : "<NULL>"),
param_new->ullparam, param_new->enumparam,
param_new->boolparam));
param_old= table->s->option_struct;
DBUG_PRINT("info", ("old strparam: '%-.64s' ullparam: %llu enumparam: %u "
"boolparam: %u",
(param_old->strparam ? param_old->strparam : "<NULL>"),
param_old->ullparam, param_old->enumparam,
param_old->boolparam));
/*
check important parameters:
for this example engine, we'll assume that changing ullparam or
boolparam requires a table to be rebuilt, while changing strparam
or enumparam - does not.
For debugging purposes we'll announce this to the client
(don't do it in your engine!)
*/
if (param_new->ullparam != param_old->ullparam)
{
push_warning_printf(ha_thd(), Sql_condition::WARN_LEVEL_NOTE,
ER_UNKNOWN_ERROR, "EXAMPLE DEBUG: ULL %llu -> %llu",
param_old->ullparam, param_new->ullparam);
DBUG_RETURN(COMPATIBLE_DATA_NO);
}
if (param_new->boolparam != param_old->boolparam)
{
push_warning_printf(ha_thd(), Sql_condition::WARN_LEVEL_NOTE,
ER_UNKNOWN_ERROR, "EXAMPLE DEBUG: YESNO %u -> %u",
param_old->boolparam, param_new->boolparam);
DBUG_RETURN(COMPATIBLE_DATA_NO);
}
#ifndef DBUG_OFF
for (uint i= 0; i < table->s->fields; i++)
{
ha_field_option_struct *f_old, *f_new;
f_old= table->s->field[i]->option_struct;
DBUG_ASSERT(f_old);
if (info->fields_option_struct[i])
{
f_new= info->fields_option_struct[i];
push_warning_printf(ha_thd(), Sql_condition::WARN_LEVEL_NOTE,
ER_UNKNOWN_ERROR, "EXAMPLE DEBUG: Field %`s COMPLEX '%s' -> '%s'",
table->s->field[i]->field_name,
f_old->complex_param_to_parse_it_in_engine,
f_new->complex_param_to_parse_it_in_engine);
}
else
DBUG_PRINT("info", ("old field %i did not changed", i));
}
#endif
DBUG_RETURN(COMPATIBLE_DATA_YES);
}
struct st_mysql_storage_engine example_storage_engine=
{ MYSQL_HANDLERTON_INTERFACE_VERSION };