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Begin adding upsert logic. This is an incremental check-in.

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FossilOrigin-Name: 809696434097e62e8ef486c7478b5eb62c0cf1342522a5584939fade82821410
This commit is contained in:
drh
2018-04-13 01:15:09 +00:00
parent fcfd756fe3
commit 788d55aa77
8 changed files with 146 additions and 16 deletions
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19
src/sqliteInt.h
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@@ -2713,11 +2713,27 @@ struct NameContext {
** An instance of the following object describes a single ON CONFLICT
** clause in an upsert. A list of these objects may be attached to
** an INSERT statement in order to form an upsert.
**
** The pUpsertTarget field is only set if the ON CONFLICT clause includes
** conflict-target clause. (In "ON CONFLICT(a,b)" the "(a,b)" is the
** conflict-target clause.)
**
** pUpsertSet is the list of column=expr terms of the UPDATE statement.
** The pUpsertSet field is NULL for a ON CONFLICT DO NOTHING. The
** pUpsertWhere is the WHERE clause for the UPDATE and is NULL if the
** WHERE clause is omitted.
**
** The pUpsertIdx is a transient pointer to the unique index described
** by pUpsertTarget. If pUpsertTarget describes the rowid, then pUpsertIdx
** will be NULL. pUpsertIdx does not own the Index object it points to.
** Care must be taken to ensure that the Index object does not expire while
** the pointer is valid.
*/
struct Upsert {
ExprList *pUpsertTarget; /* Optional description of conflicting index */
ExprList *pUpsertSet; /* The SET clause from an ON CONFLICT UPDATE */
Expr *pUpsertWhere; /* WHERE clause for the ON CONFLICT UPDATE */
Index *pUpsertIdx; /* UNIQUE index referenced by pUpsertTarget */
Upsert *pUpsertNext; /* Next ON CONFLICT clause in the list */
};
@@ -3877,7 +3893,7 @@ void sqlite3GenerateRowIndexDelete(Parse*, Table*, int, int, int*, int);
int sqlite3GenerateIndexKey(Parse*, Index*, int, int, int, int*,Index*,int);
void sqlite3ResolvePartIdxLabel(Parse*,int);
void sqlite3GenerateConstraintChecks(Parse*,Table*,int*,int,int,int,int,
u8,u8,int,int*,int*);
u8,u8,int,int*,int*,Upsert*);
#ifdef SQLITE_ENABLE_NULL_TRIM
void sqlite3SetMakeRecordP5(Vdbe*,Table*);
#else
@@ -4274,6 +4290,7 @@ const char *sqlite3JournalModename(int);
Upsert *sqlite3UpsertNew(sqlite3*,Upsert*,ExprList*,ExprList*,Expr*);
void sqlite3UpsertDelete(sqlite3*,Upsert*);
Upsert *sqlite3UpsertDup(sqlite3*,Upsert*);
int sqlite3UpsertAnalyze(Parse*,SrcList*,Upsert*);
#else
#define sqlite3UpsertNew(x,y,z,w) ((Upsert*)0)
#define sqlite3UpsertDelete(x,y)