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@quinnj quinnj commented Oct 20, 2021

Fixes #259. This one feels bad. For the schema-less input table case, we
iterated the first row to get the names so we could do some schema
validation, but then threw the row away, assuming that as we iterate
later, we would somehow get all the rows anyway. That probably was fine
in cases like a DataFrame, where iteration would correctly restart, but
for most schema-less tables, it's not uncommon to be a stateful iterator
that is forward-pass only (like SQLite.Query!). We fix this here by
ensuring that row stays intact and is inserted before iterating further
rows.

Fixes #259. This one feels bad. For the schema-less input table case, we
iterated the first row to get the names so we could do some schema
validation, but then threw the row away, assuming that as we iterate
later, we would somehow get all the rows anyway. That probably was fine
in cases like a DataFrame, where iteration would correctly restart, but
for most schema-less tables, it's not uncommon to be a stateful iterator
that is forward-pass only (like `SQLite.Query`!). We fix this here by
ensuring that row stays intact and is inserted before iterating further
rows.
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codecov bot commented Oct 20, 2021

Codecov Report

Merging #260 (9d52d28) into master (03b526e) will increase coverage by 0.18%.
The diff coverage is 100.00%.

Impacted file tree graph

@@            Coverage Diff             @@
##           master     #260      +/-   ##
==========================================
+ Coverage   84.53%   84.71%   +0.18%     
==========================================
  Files           5        5              
  Lines         666      674       +8     
==========================================
+ Hits          563      571       +8     
  Misses        103      103              
Impacted Files Coverage Δ
src/tables.jl 99.25% <100.00%> (+0.04%) ⬆️

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@quinnj quinnj merged commit 82e1add into master Oct 20, 2021
@quinnj quinnj deleted the jq/259 branch October 20, 2021 04:56
@geoffleyland
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Wow! Thanks for the quick response on this one!

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SQLite 1.2.0's load! eats the first row of rows in the unknown schema case

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