ArgumentError: 'Int32' iterates 'Int32' values, which doesn't satisfy the Tables.jl AbstractRow interface

[lucaro]

I tried to load a table containing rows of type INTEGER and TEXT but get a type error when trying to select anything from it.

julia> db = SQLite.DB("yfcc100m_dataset.sql")
SQLite.DB("yfcc100m_dataset.sql")

julia> SQLite.tables(db)
(name = ["yfcc100m_dataset"],)

julia> SQLite.columns(db, "yfcc100m_dataset")
(cid = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9  …  13, 14, 15, 16, 17, 18, 19, 20, 21, 22], name = ["photoid", "uid", "unickname", "datetaken", "dateuploaded", "capturedevice", "title", "description", "usertags", "machinetags"  …  "pageurl", "downloadurl", "licensename", "licenseurl", "serverid", "farmid", "secret", "secretoriginal", "ext", "marker"], type = ["INTEGER", "TEXT", "TEXT", "TEXT", "TEXT", "TEXT", "TEXT", "TEXT", "TEXT", "TEXT"  …  "TEXT", "TEXT", "TEXT", "TEXT", "INTEGER", "INTEGER", "TEXT", "TEXT", "TEXT", "INTEGER"], notnull = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0  …  0, 0, 0, 0, 0, 0, 0, 0, 0, 0], dflt_value = [missing, missing, missing, missing, missing, missing, missing, missing, missing, missing  …  missing, missing, missing, missing, missing, missing, missing, missing, missing, missing], pk = [1, 0, 0, 0, 0, 0, 0, 0, 0, 0  …  0, 0, 0, 0, 0, 0, 0, 0, 0, 0])

julia> SQLite.execute(db, "SELECT * FROM yfcc100m_dataset LIMIT 10") |> DataFrame
ERROR: ArgumentError: 'Int32' iterates 'Int32' values, which doesn't satisfy the Tables.jl `AbstractRow` interface
Stacktrace:
 [1] invalidtable(#unused#::Int32, #unused#::Int32)
   @ Tables C:\Users\Lucaro\.julia\packages\Tables\OWzlh\src\tofromdatavalues.jl:42
 [2] iterate
   @ C:\Users\Lucaro\.julia\packages\Tables\OWzlh\src\tofromdatavalues.jl:48 [inlined]
 [3] buildcolumns
   @ C:\Users\Lucaro\.julia\packages\Tables\OWzlh\src\fallbacks.jl:199 [inlined]
 [4] columns
   @ C:\Users\Lucaro\.julia\packages\Tables\OWzlh\src\fallbacks.jl:262 [inlined]
 [5] DataFrame(x::Int32; copycols::Nothing)
   @ DataFrames C:\Users\Lucaro\.julia\packages\DataFrames\vuMM8\src\other\tables.jl:58
 [6] DataFrame(x::Int32)
   @ DataFrames C:\Users\Lucaro\.julia\packages\DataFrames\vuMM8\src\other\tables.jl:49
 [7] |>(x::Int32, f::Type{DataFrame})
   @ Base .\operators.jl:966
 [8] top-level scope
   @ REPL[9]:1

This error also occurs when only trying to select from the TEXT columns. The database in question is this one (warning: large). Is there a work around for this?

[quinnj]

Ah, sorry for the confusion. SQLite.execute only returns a "success" code, but no results. If you do DBInterface.execute, it will return the resultset which can be loaded in a DataFrame. See #278 where we're discussing how to best fix the confusion here.

[lucaro]

I see, thanks, DBInterface.execute works!