Avoid creating clashing index names #121
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This probably wants a rebase / force-push for updated CI? |
Thank you, done. Travis now looks happy. |
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Could you rebase it rather than that merge commit? :-) |
When we create a foreign key constraint for MySQL we also create an
index, if there is not already an index beginning with the field in
question. UNIQUEness constaint are implemented by indices, and so we
should also skip adding an index if one already exists.
To avoid changing existing fully-working schemas, this change only skips
index creation if one with the same name already exists. This case
currently fails with a duplicate key error in MySQL, eg.,
ERROR 1061 (42000): Duplicate key name 'foo'
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Now rebased against current master. |
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This is to resolve a problem in which a
CREATE TABLEis generated that MySQL rejects with a duplicate key name error.When we create a foreign key constraint for MySQL we also create an index if there is not already an index beginning with the field in question. UNIQUEness constraints are implemented by indices, and so we can skip adding an index if one already exists.
To avoid changing existing working schemas, this change only skips index creation if one with the same name already exists. This case currently fails with a duplicate key error in MySQL, eg.,
ERROR 1061 (42000): Duplicate key name 'foo'