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ALTER TABLE’ tbl’ ALTER COLUMN ‘mycolumn’ SET DATA TYPE LONG NOT NULL DEFAULT -1;

Risks and Assumptions

// Describe project risks, such as API or binary compatibility issues, major protocol changes, etc.

Discussion Links

// Links to discussions on the devlist, if applicable.

Reference Links

// Links to various reference documents, if applicable.

Tickets

• it is assumed, that BinaryTuple protocol will not changed, Otherwise, we will need to implement data conversion code when row is upgraded.
• all storage engines are compatible this feature. Otherwise, we will need a workaround e.g. to fallback to a slow blocking solution.
• user may experience unexpected transactions rolling back for long transactions, which overlap the change column type operation.
  
  

Tickets