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database/sql: confusing documentation for Rows.Columns #27202

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AlekSi opened this issue Aug 24, 2018 · 4 comments
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database/sql: confusing documentation for Rows.Columns #27202

AlekSi opened this issue Aug 24, 2018 · 4 comments
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@AlekSi
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AlekSi commented Aug 24, 2018

https://tip.golang.org/pkg/database/sql/#Rows.Columns says:

Columns returns the column names. Columns returns an error if the rows are closed, or if the rows are from QueryRow and there was a deferred error.

That latter part does not make sense: it is not possible to convert Row (returned by QueryRow) to Rows.

Unless I miss something, that part should be removed.
@meirf
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meirf commented Aug 25, 2018

If this is a mistake I'm surprised it hasn't been found yet. Your "not make sense" logic seems to apply equally to the original code: https://codereview.appspot.com/5483088/diff/4001/src/pkg/exp/sql/sql.go

@AlekSi
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AlekSi commented Sep 2, 2018

/cc @kardianos

@kardianos
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@AlekSi I believe you are correct. Feel free to send a CL to fix, or I will later.

@kardianos kardianos self-assigned this Sep 3, 2018
AlekSi added a commit to AlekSi/go that referenced this issue Sep 3, 2018
@AlekSi
database/sql: fix Rows.Columns() documentation
64457e1 
Fixes golang#27202

Change-Id: I3e3bdb1c8d655deb6fdd374868fcac0621f8fa0c
@AlekSi AlekSi mentioned this issue Sep 3, 2018
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@gopherbot
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Change https://golang.org/cl/133057 mentions this issue: database/sql: fix Rows.Columns() documentation

@golang golang locked and limited conversation to collaborators Sep 3, 2019
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@AlekSi @kardianos @meirf @gopherbot