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Add the SQLITE_CHANGESETAPPLY_IGNORENOOP flag, which may be passed to sqlite3changeset_apply_v2() to have it ignore changes that would be no-ops if applied to the database (e.g. deleting a row that has already been deleted), instead of considering them conflicts.

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FossilOrigin-Name: cb023fe28560ce0f8c2fd48042553fcdb9db81eba9552be75165de0d46a2645c
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dan
2023-03-08 18:03:04 +00:00
parent 7ba63831f8
commit 975f2062da
15 changed files with 364 additions and 227 deletions
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14
ext/session/sqlite3session.h
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@ -1243,9 +1243,23 @@ int sqlite3changeset_apply_v2(
** Invert the changeset before applying it. This is equivalent to inverting
** a changeset using sqlite3changeset_invert() before applying it. It is
** an error to specify this flag with a patchset.
**
** <dt>SQLITE_CHANGESETAPPLY_IGNORENOOP <dd>
** Do not invoke the conflict handler callback for any changes that
** would not actually modify the database even if they were applied.
** Specifically, this means that the conflict handler is not invoked
** for:
** <ul>
** <li>a delete change if the row being deleted cannot be found,
** <li>an update change if the modified fields are already set to
** their new values in the conflicting row, or
** <li>an insert change if all fields of the conflicting row match
** the row being inserted.
** </ul>
*/
#define SQLITE_CHANGESETAPPLY_NOSAVEPOINT 0x0001
#define SQLITE_CHANGESETAPPLY_INVERT 0x0002
#define SQLITE_CHANGESETAPPLY_IGNORENOOP 0x0004
/*
** CAPI3REF: Constants Passed To The Conflict Handler