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Improved comments in sqliteInt.h. No changes to code.

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FossilOrigin-Name: 8ccb8d1d55fa5aaf625c30f0e7c10aa403d79b5574dbdfa3fd0271a4e546f7e3
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drh
2020-12-09 13:11:02 +00:00
parent 20b86324a1
commit 5602777e8f
3 changed files with 17 additions and 11 deletions
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14
src/sqliteInt.h
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@@ -2304,16 +2304,22 @@ struct FKey {
** is returned. REPLACE means that preexisting database rows that caused
** a UNIQUE constraint violation are removed so that the new insert or
** update can proceed. Processing continues and no error is reported.
** UPDATE applies to insert operations only and means that the insert
** is omitted and the DO UPDATE clause of an upsert is run instead.
**
** RESTRICT, SETNULL, and CASCADE actions apply only to foreign keys.
** RESTRICT, SETNULL, SETDFLT, and CASCADE actions apply only to foreign keys.
** RESTRICT is the same as ABORT for IMMEDIATE foreign keys and the
** same as ROLLBACK for DEFERRED keys. SETNULL means that the foreign
** key is set to NULL. CASCADE means that a DELETE or UPDATE of the
** key is set to NULL. SETDFLT means that the foreign key is set
** to its default value. CASCADE means that a DELETE or UPDATE of the
** referenced table row is propagated into the row that holds the
** foreign key.
**
** The OE_Default value is a place holder that means to use whatever
** conflict resolution algorthm is required from context.
**
** The following symbolic values are used to record which type
** of action to take.
** of conflict resolution action to take.
*/
#define OE_None 0 /* There is no constraint to check */
#define OE_Rollback 1 /* Fail the operation and rollback the transaction */
@@ -3067,7 +3073,7 @@ struct NameContext {
** WHERE clause is omitted.
*/
struct Upsert {
ExprList *pUpsertTarget; /* Optional description of conflicting index */
ExprList *pUpsertTarget; /* Optional description of conflict target */
Expr *pUpsertTargetWhere; /* WHERE clause for partial index targets */
ExprList *pUpsertSet; /* The SET clause from an ON CONFLICT UPDATE */
Expr *pUpsertWhere; /* WHERE clause for the ON CONFLICT UPDATE */