Function hasImplicitCastUnion

src/function/vector_cast_functions.cpp:222–245

}

static bool hasImplicitCastUnion(const LogicalType& srcType, const LogicalType& dstType) {
    if (srcType.getLogicalTypeID() == LogicalTypeID::UNION) {
        auto numFieldsSrc = UnionType::getNumFields(srcType);
        for (auto i = 0u; i < numFieldsSrc; ++i) {
            const auto& fieldName = UnionType::getFieldName(srcType, i);
            const auto& fieldType = UnionType::getFieldType(srcType, i);
            if (!UnionType::hasField(dstType, fieldName) ||
                !CastFunction::hasImplicitCast(fieldType,
                    UnionType::getFieldType(dstType, fieldName))) {
                return false;
            }
        }
        return true;
    } else {
        auto numFields = UnionType::getNumFields(dstType);
        for (auto i = 0u; i < numFields; ++i) {
            const auto& fieldType = UnionType::getFieldType(dstType, i);
            if (CastFunction::hasImplicitCast(srcType, fieldType)) {
                return true;
            }
        }
        return false;
    }
}

static bool hasImplicitCastMap(const LogicalType& srcType, const LogicalType& dstType) {
    const auto& srcKeyType = MapType::getKeyType(srcType);