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Editorial Team
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Asked: 2026-06-13T10:23:37+00:00

I paste a >2KB SQL file to mysql CLI and it randomly loses characters

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I paste a >2KB SQL file to mysql CLI and it randomly loses characters and then reports syntax error in my SQL.

For example:

(.....)
UPDATE ct_transform_target_summary
SET
ytd_margin_target = jul_margin_target + aug_margin_target + sep_margin_target + oct_margin_target + nov_margin_target + dec_margin_target +
                    jan_margin_target + feb_margin_target + mar_margin_target + apr_margin_target + may_margin_target + jun_margin_target,
ytd_adjustments = jul_margin_adj + aug_margin_adj + sep_margin_adj + oct_margin_adj + nov_margin_adj + dec_margin_adj +
                  jan_margin_adj + feb_margin_adj + mar_margin_adj + apt_margin_adj + may_margin_adj + jun_margin_adj,
ytd_margin = jul_margin + aug_margin + sep_margin + oct_margin + nov_margin + dec_margin +
             jan_margin + feb_margin + mar_margin + apr_margin + may_margin + jun_margin;
(....)

Becomes:

(....)
->   
->   
->   SET
->     ytd_margin_target = jul_margin_target + aug_margin_target + sep_margin_target + oct_margin_target + nov_margin_target + dec_margin_target +
->                    
->     ytd_adjustments = jul_margin_adj + aug_margin_adj + sep_margin_adj + oct_margin_adj + nov_margin_adj + dec_margin_adj +
->                       jan_margin_adj + feb_ma
->     ytd_margin = jul_margin + aug_margin + sep_margin + oct_margin + nov_margin + dec_margin +
->                  jan_margin + feb_margin + mar_margin + apr_margin + may_

This apparently never happens to short SQL code, but only happens to long code.
Could this be caused by my terminal (Fedora 17 Gnome terminal) or could it be an issue of mysql CLI?

Never had I experienced such problem in terminal before. It only happens in mysql cli.

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1 Answer

  1. Editorial Team

    Pasting into the MySQL CLI client is tricky, because it uses Readline for interactive line editing. Readline interprets certain input as control sequences and does not pass them verbatim to the MySQL client. The character most likely to be causing problems in your case is tabulation, used often for indentation purposes in SQL, but used in Readline for tab completion. Inadvertent tab completion in the middle of your query might have very unexpected results and it is often hard to pinpoint the exact location where it has introduced interference.

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