prepare (1/4): 
finished

cmake (2/4): 
-- The C compiler identification is Clang 6.0.0
-- The CXX compiler identification is Clang 6.0.0
-- Check for working C compiler: /usr/bin/clang
-- Check for working C compiler: /usr/bin/clang -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/clang++
-- Check for working CXX compiler: /usr/bin/clang++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Configuring done
-- Generating done
-- Build files have been written to: /out/build
finished

make (3/4): 
Scanning dependencies of target lemondb
[  3%] Building CXX object CMakeFiles/lemondb.dir/main.cpp.o
[  7%] Building CXX object CMakeFiles/lemondb.dir/db/Database.cpp.o
[ 10%] Building CXX object CMakeFiles/lemondb.dir/db/Table.cpp.o
[ 14%] Building CXX object CMakeFiles/lemondb.dir/query/Query.cpp.o
[ 17%] Building CXX object CMakeFiles/lemondb.dir/query/QueryParser.cpp.o
[ 21%] Building CXX object CMakeFiles/lemondb.dir/query/QueryResult.cpp.o
[ 25%] Building CXX object CMakeFiles/lemondb.dir/query/QueryBuilders.cpp.o
[ 28%] Building CXX object CMakeFiles/lemondb.dir/query/management/LoadTableQuery.cpp.o
[ 32%] Building CXX object CMakeFiles/lemondb.dir/query/management/DropTableQuery.cpp.o
[ 35%] Building CXX object CMakeFiles/lemondb.dir/query/management/DumpTableQuery.cpp.o
[ 39%] Building CXX object CMakeFiles/lemondb.dir/query/management/ListTableQuery.cpp.o
[ 42%] Building CXX object CMakeFiles/lemondb.dir/query/management/QuitQuery.cpp.o
[ 46%] Building CXX object CMakeFiles/lemondb.dir/query/management/PrintTableQuery.cpp.o
[ 50%] Building CXX object CMakeFiles/lemondb.dir/query/management/CopyTableQuery.cpp.o
[ 53%] Building CXX object CMakeFiles/lemondb.dir/query/management/TruncateTableQuery.cpp.o
[ 57%] Building CXX object CMakeFiles/lemondb.dir/query/data/InsertQuery.cpp.o
[ 60%] Building CXX object CMakeFiles/lemondb.dir/query/data/UpdateQuery.cpp.o
[ 64%] Building CXX object CMakeFiles/lemondb.dir/query/data/AddQuery.cpp.o
[ 67%] Building CXX object CMakeFiles/lemondb.dir/query/data/CountQuery.cpp.o
[ 71%] Building CXX object CMakeFiles/lemondb.dir/query/data/DuplicateQuery.cpp.o
[ 75%] Building CXX object CMakeFiles/lemondb.dir/query/data/MaxQuery.cpp.o
/in/query/data/MaxQuery.cpp:8:31: error: expression is not assignable
    if (this->operands.size() = 0)
        ~~~~~~~~~~~~~~~~~~~~~ ^
/in/query/data/MaxQuery.cpp:21:39: error: comparison of integers of different signs: 'int' and 'std::vector::size_type' (aka 'unsigned long') [-Werror,-Wsign-compare]
                    for (int i = 0; i < operands.size(); i++){
                                    ~ ^ ~~~~~~~~~~~~~~~
/in/query/data/MaxQuery.cpp:48:13: error: use of undeclared identifier 'InsertQuery'
std::string InsertQuery::toString() {
            ^
3 errors generated.
CMakeFiles/lemondb.dir/build.make:542: recipe for target 'CMakeFiles/lemondb.dir/query/data/MaxQuery.cpp.o' failed
make[2]: *** [CMakeFiles/lemondb.dir/query/data/MaxQuery.cpp.o] Error 1
make[2]: *** Waiting for unfinished jobs....
CMakeFiles/Makefile2:67: recipe for target 'CMakeFiles/lemondb.dir/all' failed
make[1]: *** [CMakeFiles/lemondb.dir/all] Error 2
Makefile:83: recipe for target 'all' failed
make: *** [all] Error 2

build failed