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SQL, Tests: temporal_current_timestamp for setting default AS OF timestamp [closes #117]

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This commit is contained in:
kevg
2017-02-27 16:31:37 +03:00
committed by Aleksey Midenkov
parent fc7da4dd4f
commit b8bfc06b26
6 changed files with 98 additions and 0 deletions
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23
sql/sql_select.cc
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@ -62,6 +62,7 @@
#include <my_bit.h>
#include <hash.h>
#include <ft_global.h>
#include "sys_vars_shared.h"
/*
A key part number that means we're using a fulltext scan.
@ -775,6 +776,28 @@ int vers_setup_select(THD *thd, TABLE_LIST *tables, COND **where_expr,
DBUG_RETURN(-1);
}
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.type != FOR_SYSTEM_TIME_UNSPECIFIED)
{
switch (slex->lock_type)