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Misc: vers_select_conds_t::init_from_sysvar()

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This commit is contained in:
kevg
2017-03-21 13:33:26 +03:00
committed by Aleksey Midenkov
parent 352d83569b
commit 21e8b22f53
2 changed files with 27 additions and 18 deletions
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43
sql/sql_select.cc
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@@ -668,6 +668,29 @@ setup_without_group(THD *thd, Ref_ptr_array ref_pointer_array,
DBUG_RETURN(res);
}
bool vers_select_conds_t::init_from_sysvar(THD *thd)
{
const char var[]= "temporal_current_timestamp";
sys_var *sv= intern_find_sys_var(var, sizeof(var) - 1);
DBUG_ASSERT(sv);
const char *data= *(char **)sv->option.value;
DBUG_ASSERT(data);
if (0 == strcmp(data, "all"))
{
init(FOR_SYSTEM_TIME_ALL, UNIT_TIMESTAMP);
}
else if (0 != strcmp(data, "now"))
{
Item *ts=
create_temporal_literal(thd, data, strlen(data), system_charset_info,
MYSQL_TYPE_DATETIME, true);
if (!ts)
return true;
init(FOR_SYSTEM_TIME_AS_OF, UNIT_TIMESTAMP, ts);
}
return false;
}
int vers_setup_select(THD *thd, TABLE_LIST *tables, COND **where_expr,
SELECT_LEX *slex)
{
@@ -778,24 +801,8 @@ int vers_setup_select(THD *thd, TABLE_LIST *tables, COND **where_expr,
if (vers_conditions.type == FOR_SYSTEM_TIME_UNSPECIFIED)
{
const char var[]= "temporal_current_timestamp";
sys_var *sv= intern_find_sys_var(var, sizeof(var) - 1);
DBUG_ASSERT(sv);
const char *data= *(char **)sv->option.value;
DBUG_ASSERT(data);
if (0 == strcmp(data, "all"))
{
vers_conditions.init(FOR_SYSTEM_TIME_ALL, UNIT_TIMESTAMP);
}
else if (0 != strcmp(data, "now"))
{
Item *ts= create_temporal_literal(thd, data, strlen(data),
system_charset_info,
MYSQL_TYPE_DATETIME, true);
if (!ts)
DBUG_RETURN(-1);
vers_conditions.init(FOR_SYSTEM_TIME_AS_OF, UNIT_TIMESTAMP, ts);
}
if (vers_conditions.init_from_sysvar(thd))
DBUG_RETURN(-1);
}
if (vers_conditions.type != FOR_SYSTEM_TIME_UNSPECIFIED)