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[Improvement](execute) optimize for ColumnNullable's serialize_vec/deserialize_vec (#28788)

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optimize for ColumnNullable's serialize_vec/deserialize_vec
This commit is contained in:
Pxl
2024-01-11 11:19:15 +08:00
committed by yiguolei
parent e93a16ac6e
commit 3cf95d0fdf
44 changed files with 334 additions and 393 deletions
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28
be/src/vec/functions/nullif.cpp
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@ -50,11 +50,6 @@ class FunctionContext;
namespace doris::vectorized {
class FunctionNullIf : public IFunction {
public:
struct NullPresence {
bool has_nullable = false;
bool has_null_constant = false;
};
static constexpr auto name = "nullif";
static FunctionPtr create() { return std::make_shared<FunctionNullIf>(); }
@ -69,33 +64,18 @@ public:
return make_nullable(arguments[0]);
}
NullPresence get_null_resense(const ColumnsWithTypeAndName& args) const {
NullPresence res;
for (const auto& elem : args) {
if (!res.has_nullable) res.has_nullable = elem.type->is_nullable();
if (!res.has_null_constant) res.has_null_constant = elem.type->only_null();
}
return res;
}
DataTypePtr get_return_type_for_equal(const ColumnsWithTypeAndName& arguments) const {
static DataTypePtr get_return_type_for_equal(const ColumnsWithTypeAndName& arguments) {
ColumnsWithTypeAndName args_without_low_cardinality(arguments);
for (ColumnWithTypeAndName& arg : args_without_low_cardinality) {
bool is_const = arg.column && is_column_const(*arg.column);
if (is_const)
if (is_const) {
arg.column = assert_cast<const ColumnConst&>(*arg.column).remove_low_cardinality();
}
}
if (!arguments.empty()) {
NullPresence null_presence = get_null_resense(arguments);
if (null_presence.has_null_constant) {
return make_nullable(std::make_shared<DataTypeNothing>());
}
if (null_presence.has_nullable) {
if (get_null_presence(arguments)) {
return make_nullable(std::make_shared<doris::vectorized::DataTypeUInt8>());
}
}