Rework handling quoted object names and reserved SQL keywords #6589
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morozov
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sp_rename accepts the old name as a qualified name but the new name as a literal value. The caller of the stored procedure should be able to qualify the old name in order to reference a column in some table or a table in some schema, etc. But it's not necessary for the new name because the reference to the object being renamed is already established in the old name.
The pattern used in parseTableCommentFromSQL() was invalid. It would wrap the value returned by quoteSingleIdentifier() in another set of quotes. It would only work for unquoted table names, which would be handled but the pattern that matches an unquoted name. Before we enforce quoting of all table names, we need to fix the pattern.
The SQL being used by a component is an implementation detail. It should be tested in unit tests.
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This is an early draft of an attempt to rework handling quoted object names and eliminate the need to maintain platform-specific keywords in the library.
It will partially fix #4357.