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SQL: TRUNCATE FOR SYSTEM_TIME BEFORE [closes #111]

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This commit is contained in:
kevg
2017-01-12 13:51:12 +03:00
committed by Aleksey Midenkov
parent 3a64d55aed
commit e069de7d9d
7 changed files with 112 additions and 6 deletions
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18
sql/sql_select.cc
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@ -762,6 +762,14 @@ int vers_setup_select(THD *thd, TABLE_LIST *tables, COND **where_expr,
table->vers_conditions.type == FOR_SYSTEM_TIME_UNSPECIFIED ?
slex->vers_conditions : table->vers_conditions;
if (vers_conditions.type == FOR_SYSTEM_TIME_BEFORE &&
thd->lex->sql_command != SQLCOM_TRUNCATE)
{
my_error(ER_VERS_WRONG_QUERY_TYPE, MYF(0), "FOR SYSTEM_TIME BEFORE",
"TRUNCATE");
DBUG_RETURN(-1);
}
if (vers_conditions.type != FOR_SYSTEM_TIME_UNSPECIFIED)
{
switch (slex->lock_type)
@ -869,6 +877,10 @@ int vers_setup_select(THD *thd, TABLE_LIST *tables, COND **where_expr,
cond2= newx Item_func_ge(thd, row_end,
vers_conditions.start);
break;
case FOR_SYSTEM_TIME_BEFORE:
cond1= newx Item_func_lt(thd, row_end,
vers_conditions.start);
break;
default:
DBUG_ASSERT(0);
}
@ -912,6 +924,12 @@ int vers_setup_select(THD *thd, TABLE_LIST *tables, COND **where_expr,
newx Item_func_vtq_trx_sees_eq(thd, trx_id1, row_start);
cond2= newx Item_func_vtq_trx_sees_eq(thd, row_end, trx_id0);
break;
case FOR_SYSTEM_TIME_BEFORE:
trx_id0= vers_conditions.unit == UNIT_TIMESTAMP ?
newx Item_func_vtq_id(thd, vers_conditions.start, VTQ_TRX_ID) :
vers_conditions.start;
cond1= newx Item_func_lt(thd, row_end, trx_id0);
break;
default:
DBUG_ASSERT(0);
}