UNION not returning correct result

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Question about how to …

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Something is not working as expected:

• Describe the problem

  UNION does not work.

• Provide code that replicates the problem

data1=[{a:'abc'},{a:'xyz'}]
data2=[{a:'123'},{a:'987'}]

alasql("select * from :a union select * from :b",{a:data1,b:data2})

— FF 95.01 Linux

[
  {},
  {},
  {
    "a": "abc"
  },
  {
    "a": "xyz"
  }
]

alasql.version “1.7.3-develop-0be167bcundefined”

----- Chrome 97.0 Linux

[
    {},
    {},
    {
        "a": "abc"
    },
    {
        "a": "xyz"
    }
]

alasql.version ‘1.7.3-develop-0be167bcundefined’

---- Node

> data1=[{a:'abc'},{a:'xyz'}]
[ { a: 'abc' }, { a: 'xyz' } ]
> data2=[{a:'123'},{a:'987'}]
[ { a: '123' }, { a: '987' } ]
> 
> alasql("select * from :a union select * from :b",{a:data1,b:data2})
[ {}, {}, { a: 'abc' }, { a: 'xyz' } ]
> alasql.version
'1.7.3-develop-0be167bcundefined'

---- How does it work in sqlite3

sqlite> create table one(a text);
sqlite> create table two(a text);
sqlite> insert into a values('abc'),('def');
sqlite> insert into two values('xyz'),('123');
sqlite> select * from one union select * from two;
123
abc
def
xyz

• We suggest to spawn a jsfiddle from http://jsfiddle.net/98qL7m0c/

---

Maybe I’m using alasql incorrectly? I tried looking at some documentation in the wiki but the section on union is quite spartan.

Anyway, thanks a lot!

[Tisamu]

Nice ! Thanks for the tips. 😄

[Tisamu]

Hello, sorry for giving no news.

Yep I’ve debugged a bit and it seems that the params of the first table are not passed to the union compilation method.

I’m still trying to understand all the compilation process of the query so I’m not sure where is the problem precisely.

I’m gonna work more on it this weekend. 😄