fix rows next

[ducquangkstn]

PR Details

Fix bug

Description

rows.Next should increase the curRow variable
while rows.Columns shouldn't do it

Related Issue

#502

Motivation and Context

How Has This Been Tested

• Add a unit test. Using require to cancel the test immediately instead of

if !assert.NoError(t, rows.Error()) {
	t.FailNow()
}

Types of changes

• Docs change / refactoring / dependency upgrade
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[xuri]

Thanks for your PR. I left some comments.

[codecov-io]

Codecov Report

Merging #503 into master will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master     #503   +/-   ##
=======================================
  Coverage   96.26%   96.26%           
=======================================
  Files          26       26           
  Lines        5513     5513           
=======================================
  Hits         5307     5307           
  Misses        115      115           
  Partials       91       91

Impacted Files	Coverage Δ
rows.go	84.86% <100%> (ø)	⬆️

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[ducquangkstn]

Change as requested

[mlh758]

Sorry about that!