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Modify the sqlite3session_diff() API so that tables with no PRIMARY KEYs are ignored. This matches the other sessions APIs. Also change sqlite3session_diff() so that it returns SQLITE_SCHEMA, instead of SQLITE_ERROR, if the tables being compared do not have compatible schemas.

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FossilOrigin-Name: aada0ad08e3baa10d14d1f3393183110289e068e
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dan
2015-04-23 17:22:49 +00:00
parent 4cc923e3e3
commit b9db909952
6 changed files with 51 additions and 41 deletions
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5
ext/session/sqlite3session.h
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@ -293,6 +293,11 @@ int sqlite3session_changeset(
** <li> Has the same PRIMARY KEY definition.
** </ul>
**
** If the tables are not compatible, SQLITE_SCHEMA is returned. If the tables
** are compatible but do not have any PRIMARY KEY columns, it is not an error
** but no changes are added to the session object. As with other session
** APIs, tables without PRIMARY KEYs are simply ignored.
**
** This function adds a set of changes to the session object that could be
** used to update the table in database zFrom (call this the "from-table")
** so that its content is the same as the table attached to the session