int ObObj::apply(const ObObj &mutation)
{
int err = OB_SUCCESS;
int org_type = get_type();
int org_ext = get_ext();
int mut_type = mutation.get_type();
ObCreateTime create_time = 0;
ObModifyTime modify_time = 0;
bool is_add = false;
bool org_is_add = false;
if (ObSeqType == mut_type
|| ObMinType >= mut_type
|| ObMaxType <= mut_type)
{
TBSYS_LOG(WARN,"unsupported type [type:%d]", mut_type);
err = OB_INVALID_ARGUMENT;
}
if (OB_SUCCESS == err
&& ObExtendType != org_type
&& ObNullType != org_type
&& ObExtendType != mut_type
&& ObNullType != mut_type
&& org_type != mut_type)
{
TBSYS_LOG(WARN,"type not coincident [this->type:%d,mutation.type:%d]",
org_type, mut_type);
err = OB_INVALID_ARGUMENT;
}
_ObjValue value, mutation_value;
if (OB_SUCCESS == err)
{
bool ext_val_can_change = (ObActionFlag::OP_ROW_DOES_NOT_EXIST == org_ext) || (ObNullType == org_type);
bool org_is_nop = (ObActionFlag::OP_NOP == org_ext);
switch (mut_type)
{
case ObNullType:
set_null();
break;
case ObVarcharType:
*this = mutation;
break;
case ObBoolType:
*this = mutation;
break;
case ObIntType:
if (ext_val_can_change || org_is_nop)
{
set_int(0);
}
err = get_int(value.int_val,org_is_add);
if (OB_SUCCESS == err)
{
err = mutation.get_int(mutation_value.int_val,is_add);
}
if (OB_SUCCESS == err)
{
if (is_add)
{
value.int_val += mutation_value.int_val; // @bug value overflow
}
else
{
value.int_val = mutation_value.int_val;
}
set_int(value.int_val, (org_is_add || org_is_nop) && is_add);
}
break;
case ObFloatType:
if (ext_val_can_change || org_is_nop)
{
set_float(0);
}
err = get_float(value.float_val,org_is_add);
if (OB_SUCCESS == err)
{
err = mutation.get_float(mutation_value.float_val, is_add);
}
if (OB_SUCCESS == err)
{
if (is_add)
{
value.float_val += mutation_value.float_val;
}
else
{
value.float_val = mutation_value.float_val;
}
set_float(value.float_val,is_add && (org_is_add || org_is_nop));
}
break;
case ObDoubleType:
if (ext_val_can_change || org_is_nop)
{
set_double(0);
}
err = get_double(value.double_val,org_is_add);
if (OB_SUCCESS == err)
{
err = mutation.get_double(mutation_value.double_val,is_add);
}
if (OB_SUCCESS == err)
{
if (is_add)
{
value.double_val += mutation_value.double_val;
}
else
{
value.double_val = mutation_value.double_val;
}
set_double(value.double_val, (org_is_add || org_is_nop) && is_add);
}
break;
case ObDateTimeType:
if (ext_val_can_change || org_is_nop)
{
set_datetime(0);
}
err = get_datetime(value.second_val,org_is_add);
if (OB_SUCCESS == err)
{
err = mutation.get_datetime(mutation_value.second_val,is_add);
}
if (OB_SUCCESS == err)
{
if (is_add)
{
value.second_val += mutation_value.second_val;
}
else
{
value.second_val = mutation_value.second_val;
}
set_datetime(value.second_val,is_add && (org_is_add || org_is_nop));
}
break;
case ObPreciseDateTimeType:
if (ext_val_can_change || org_is_nop)
{
set_precise_datetime(0);
}
err = get_precise_datetime(value.microsecond_val,org_is_add);
if (OB_SUCCESS == err)
{
err = mutation.get_precise_datetime(mutation_value.microsecond_val,is_add);
}
if (OB_SUCCESS == err)
{
if (is_add)
{
value.microsecond_val += mutation_value.microsecond_val;
}
else
{
value.microsecond_val = mutation_value.microsecond_val;
}
set_precise_datetime(value.microsecond_val,is_add && (org_is_add || org_is_nop));
}
break;
case ObExtendType:
switch (mutation.get_ext())
{
case ObActionFlag::OP_DEL_ROW:
case ObActionFlag::OP_DEL_TABLE:
/// used for join, if right row was deleted, set the cell to null
set_null();
break;
case ObActionFlag::OP_ROW_DOES_NOT_EXIST:
/// do nothing
break;
case ObActionFlag::OP_NOP:
if (org_ext == ObActionFlag::OP_ROW_DOES_NOT_EXIST
|| org_ext == ObActionFlag::OP_DEL_ROW)
{
set_null();
}
break;
default:
TBSYS_LOG(ERROR,"unsupported ext value [value:%ld]", mutation.get_ext());
err = OB_INVALID_ARGUMENT;
break;
}
break;
case ObCreateTimeType:
err = mutation.get_createtime(create_time);
if (OB_SUCCESS == err)
{
if (ext_val_can_change || org_is_nop)
{
set_createtime(create_time);
}
}
if (OB_SUCCESS == err)
{
err = get_createtime(value.create_time_val);
}
if (OB_SUCCESS == err)
{
err = mutation.get_createtime(mutation_value.create_time_val);
}
if (OB_SUCCESS == err)
{
set_createtime(std::min<ObCreateTime>(value.create_time_val,mutation_value.create_time_val));
}
break;
case ObModifyTimeType:
err = mutation.get_modifytime(modify_time);
if (OB_SUCCESS == err)
{
if (ext_val_can_change || org_is_nop)
{
set_modifytime(modify_time);
}
}
if (OB_SUCCESS == err)
{
err = get_modifytime(value.modify_time_val);
}
if (OB_SUCCESS == err)
{
err = mutation.get_modifytime(mutation_value.modify_time_val);
}
if (OB_SUCCESS == err)
{
set_modifytime(std::max<ObCreateTime>(value.modify_time_val,mutation_value.modify_time_val));
}
break;
case ObDecimalType:
{
ObNumber num, mutation_num, res;
if (ext_val_can_change || org_is_nop)
{
num.set_zero();
}
else
{
err = get_decimal(num, org_is_add);
}
if (OB_SUCCESS == err)
{
err = mutation.get_decimal(mutation_num, is_add);
}
if (OB_SUCCESS == err)
{
if (is_add)
{
err = num.add(mutation_num, res);
}
else
{
res = mutation_num;
}
}
if (OB_SUCCESS == err)
{
set_decimal(res, meta_.dec_precision_, meta_.dec_scale_, (org_is_add || org_is_nop) && is_add);
}
break;
}
default:
/* case ObSeqType: */
TBSYS_LOG(ERROR,"unsupported type [type:%d]", mut_type);
err = OB_INVALID_ARGUMENT;
break;
}
}
if(OB_SUCCESS != err)
{
TBSYS_LOG(WARN,"fail to apply [this->type:%d,this->ext:%d,"
"mutation->type:%d,mutation->ext:%ld, err:%d]",
org_type, org_ext, mut_type, mutation.get_ext(), err);
}
return err;
}
int ObObj::compare_same_type(const ObObj &other) const
{
int cmp = 0;
switch(get_type())
{
case ObIntType:
if (this->value_.int_val < other.value_.int_val)
{
cmp = -1;
}
else if (this->value_.int_val == other.value_.int_val)
{
cmp = 0;
}
else
{
cmp = 1;
}
break;
case ObDecimalType:
{
ObNumber n1, n2;
get_decimal(n1);
other.get_decimal(n2);
cmp = n1.compare(n2);
break;
}
case ObVarcharType:
{
ObString varchar1, varchar2;
this->get_varchar(varchar1);
other.get_varchar(varchar2);
cmp = varchar1.compare(varchar2);
break;
}
case ObFloatType:
{
bool float_eq = fabsf(value_.float_val - other.value_.float_val) < FLOAT_EPSINON;
if (float_eq)
{
cmp = 0;
}
else if (this->value_.float_val < other.value_.float_val)
{
cmp = -1;
}
else
{
cmp = 1;
}
break;
}
case ObDoubleType:
{
bool double_eq = fabs(value_.double_val - other.value_.double_val) < DOUBLE_EPSINON;
if (double_eq)
{
cmp = 0;
}
else if (this->value_.double_val < other.value_.double_val)
{
cmp = -1;
}
else
{
cmp = 1;
}
break;
}
case ObDateTimeType:
case ObPreciseDateTimeType:
case ObCreateTimeType:
case ObModifyTimeType:
{
int64_t ts1 = 0;
int64_t ts2 = 0;
get_timestamp(ts1);
other.get_timestamp(ts2);
if (ts1 < ts2)
{
cmp = -1;
}
else if (ts1 == ts2)
{
cmp = 0;
}
else
{
cmp = 1;
}
break;
}
case ObBoolType:
cmp = this->value_.bool_val - other.value_.bool_val;
break;
default:
TBSYS_LOG(ERROR, "invalid type=%d", get_type());
break;
}
return cmp;
}
