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PT-2116 pt-osc --null-to-not-null description is wrong (#580)

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Old documentation was incomplete: old rows would not use the new user defined default value for the altered column.
Only new rows inserted after pt-osc would use the user defined default value.
Existing rows would only be converted to a default value derived from the datatype, as it used to be the case with mysql 5.6
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Yoann La Cancellera
2023-01-31 13:49:20 +01:00
committed by GitHub
parent f585c9922d
commit a7531c2cb9
1 changed files with 3 additions and 3 deletions
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6
bin/pt-online-schema-change
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@@ -12759,9 +12759,9 @@ exist.
=item --null-to-not-null
Allows MODIFYing a column that allows NULL values to one that doesn't allow
them. The rows which contain NULL values will be converted to the defined
default value. If no explicit DEFAULT value is given MySQL will assign a default
value based on datatype, e.g. 0 for number datatypes, '' for string datatypes.
them. The existing rows which contain NULL values will be converted to the default value
based on datatype, e.g. 0 for number datatypes, '' for string datatypes.
New rows will use the user defined default value if specified for the column.
=item --only-same-schema-fks