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Clarify the handling of the sqlite_stat1 table by legacy versions of the

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sessions module.

FossilOrigin-Name: dc7c48cb4126db9e25c73512cc743155293fe1c4c2516f8c84102228695b6e70
This commit is contained in:
dan
2018-01-18 16:56:19 +00:00
parent e3ca3831ba
commit cae5b9feac
3 changed files with 14 additions and 9 deletions
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9
ext/session/sqlite3session.h
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@ -150,8 +150,8 @@ int sqlite3session_indirect(sqlite3_session *pSession, int bIndirect);
**
** <h3>Special sqlite_stat1 Handling</h3>
**
** The "sqlite_stat1" table is an exception to some of the rules above. In
** SQLite, the schema of sqlite_stat1 is:
** As of SQLite version 3.22.0, the "sqlite_stat1" table is an exception to
** some of the rules above. In SQLite, the schema of sqlite_stat1 is:
** <pre>
** &nbsp; CREATE TABLE sqlite_stat1(tbl,idx,stat)
** </pre>
@ -171,6 +171,11 @@ int sqlite3session_indirect(sqlite3_session *pSession, int bIndirect);
** iterator directly (including on a changeset iterator passed to a
** conflict-handler callback) then the X'' value is returned. The application
** must translate X'' to NULL itself if required.
**
** Legacy (older than 3.22.0) versions of the sessions module cannot capture
** changes made to the sqlite_stat1 table. Legacy versions of the
** sqlite3changeset_apply() function silently ignore any modifications to the
** sqlite_stat1 table that are part of a changeset or patchset.
*/
int sqlite3session_attach(
sqlite3_session *pSession, /* Session object */