[tarantool-patches] Re: [PATCH] sql: remove preupdate hook
Kirill Yukhin
kyukhin at tarantool.org
Fri Jul 27 16:19:42 MSK 2018
Hello Nikita,
On 27 июл 14:40, n.pettik wrote:
> I have grepped and found few mentions about preupdate hook
> which you didn’t delete.
>
> Firstly, it seems that you can remove struct PreUpdate.
> Secondly, one comment in update.c (line 565):
>
> * That (regNew==regnewPk+1) is true is also important for the
> * pre-update hook. If the caller invokes preupdate_new(), the returned
> * value is copied from memory cell (regNewPk+1+iCol), where iCol
> * is the column index supplied by the user.
>
> Remove it as well pls.
Fixed. Updated patch below.
--
Regards, Kirill Yukhin
commit 5d03ba58982a89b8b1eb0f86579e37a213e5b3af
Author: Kirill Yukhin <kyukhin at tarantool.org>
Date: Fri Jul 27 14:00:06 2018 +0300
sql: remove preupdate hook
SQLITE_ENABLE_PREUPDATE_HOOK is dead macro.
Remove it.
Part of #2356
diff --git a/src/box/sql/main.c b/src/box/sql/main.c
index ded3b5b..4187bb5 100644
--- a/src/box/sql/main.c
+++ b/src/box/sql/main.c
@@ -1325,26 +1325,6 @@ sqlite3_rollback_hook(sqlite3 * db, /* Attach the hook to this database */
return pRet;
}
-#ifdef SQLITE_ENABLE_PREUPDATE_HOOK
-/*
- * Register a callback to be invoked each time a row is updated,
- * inserted or deleted using this database connection.
- */
-void *
-sqlite3_preupdate_hook(sqlite3 * db, /* Attach the hook to this database */
- void (*xCallback) ( /* Callback function */
- void *, sqlite3 *, int,
- char const *, sqlite3_int64, sqlite3_int64),
- void *pArg) /* First callback argument */
-{
- void *pRet;
- pRet = db->pPreUpdateArg;
- db->xPreUpdateCallback = xCallback;
- db->pPreUpdateArg = pArg;
- return pRet;
-}
-#endif /* SQLITE_ENABLE_PREUPDATE_HOOK */
-
/*
* Configure an sqlite3_wal_hook() callback to automatically checkpoint
* a database after committing a transaction if there are nFrame or
diff --git a/src/box/sql/sqliteInt.h b/src/box/sql/sqliteInt.h
index 5ca91b2..b595984 100644
--- a/src/box/sql/sqliteInt.h
+++ b/src/box/sql/sqliteInt.h
@@ -1483,7 +1483,6 @@ typedef struct Lookaside Lookaside;
typedef struct LookasideSlot LookasideSlot;
typedef struct NameContext NameContext;
typedef struct Parse Parse;
-typedef struct PreUpdate PreUpdate;
typedef struct PrintfArguments PrintfArguments;
typedef struct RowSet RowSet;
typedef struct Savepoint Savepoint;
@@ -1626,14 +1625,6 @@ struct sqlite3 {
void *pUpdateArg;
void (*xUpdateCallback) (void *, int, const char *, const char *,
sqlite_int64);
-#ifdef SQLITE_ENABLE_PREUPDATE_HOOK
- void *pPreUpdateArg; /* First argument to xPreUpdateCallback */
- void (*xPreUpdateCallback) ( /* Registered using sqlite3_preupdate_hook() */
- void *, sqlite3 *, int, char const *,
- char const *, sqlite3_int64,
- sqlite3_int64);
- PreUpdate *pPreUpdate; /* Context for active pre-update callback */
-#endif /* SQLITE_ENABLE_PREUPDATE_HOOK */
sqlite3_value *pErr; /* Most recent error message */
union {
volatile int isInterrupted; /* True if sqlite3_interrupt has been called */
@@ -2956,12 +2947,8 @@ struct Parse {
#define OPFLAG_NCHANGE 0x01 /* OP_Insert: Set to update db->nChange */
/* Also used in P2 (not P5) of OP_Delete */
#define OPFLAG_EPHEM 0x01 /* OP_Column: Ephemeral output is ok */
-#define OPFLAG_ISUPDATE 0x04 /* This OP_Insert is an sql UPDATE */
#define OPFLAG_OE_IGNORE 0x200 /* OP_IdxInsert: Ignore flag */
#define OPFLAG_OE_FAIL 0x400 /* OP_IdxInsert: Fail flag */
-#ifdef SQLITE_ENABLE_PREUPDATE_HOOK
-#define OPFLAG_ISNOOP 0x40 /* OP_Delete does pre-update-hook only */
-#endif
#define OPFLAG_LENGTHARG 0x40 /* OP_Column only used for length() */
#define OPFLAG_TYPEOFARG 0x80 /* OP_Column only used for typeof() */
#define OPFLAG_SEEKEQ 0x02 /* OP_Open** cursor uses EQ seek only */
diff --git a/src/box/sql/update.c b/src/box/sql/update.c
index d51a05c..489a456 100644
--- a/src/box/sql/update.c
+++ b/src/box/sql/update.c
@@ -559,26 +559,12 @@ sqlite3Update(Parse * pParse, /* The parser context */
}
/* If changing the PK value, or if there are foreign key constraints
- * to process, delete the old record. Otherwise, add a noop OP_Delete
- * to invoke the pre-update hook.
- *
- * That (regNew==regnewPk+1) is true is also important for the
- * pre-update hook. If the caller invokes preupdate_new(), the returned
- * value is copied from memory cell (regNewPk+1+iCol), where iCol
- * is the column index supplied by the user.
+ * to process, delete the old record.
*/
assert(regNew == regNewPk + 1);
-#ifdef SQLITE_ENABLE_PREUPDATE_HOOK
- sqlite3VdbeAddOp3(v, OP_Delete, iDataCur,
- OPFLAG_ISUPDATE |
- ((hasFK || chngKey
- || pPk != 0) ? 0 : OPFLAG_ISNOOP),
- regNewRowid);
-#else
if (hasFK || chngPk || pPk != 0) {
sqlite3VdbeAddOp2(v, OP_Delete, iDataCur, 0);
}
-#endif
if (bReplace || chngPk) {
sqlite3VdbeJumpHere(v, addr1);
}
diff --git a/src/box/sql/vdbe.c b/src/box/sql/vdbe.c
index dc22c26..2144d95 100644
--- a/src/box/sql/vdbe.c
+++ b/src/box/sql/vdbe.c
@@ -119,16 +119,6 @@ updateMaxBlobsize(Mem *p)
}
#endif
-/*
- * This macro evaluates to true if either the update hook or the preupdate
- * hook are enabled for database connect DB.
- */
-#ifdef SQLITE_ENABLE_PREUPDATE_HOOK
-# define HAS_UPDATE_HOOK(DB) ((DB)->xPreUpdateCallback||(DB)->xUpdateCallback)
-#else
-# define HAS_UPDATE_HOOK(DB) ((DB)->xUpdateCallback)
-#endif
-
/*
* The next global variable is incremented each time the OP_Found opcode
* is executed. This is used to test whether or not the foreign key
diff --git a/src/box/sql/vdbeInt.h b/src/box/sql/vdbeInt.h
index e5ed94c..a4770a5 100644
--- a/src/box/sql/vdbeInt.h
+++ b/src/box/sql/vdbeInt.h
@@ -420,24 +420,6 @@ struct Vdbe {
#define VDBE_MAGIC_RESET 0x48fa9f76 /* Reset and ready to run again */
#define VDBE_MAGIC_DEAD 0x5606c3c8 /* The VDBE has been deallocated */
-/*
- * Structure used to store the context required by the
- * sqlite3_preupdate_*() API functions.
- */
-struct PreUpdate {
- Vdbe *v;
- VdbeCursor *pCsr; /* Cursor to read old values from */
- int op; /* One of SQLITE_INSERT, UPDATE, DELETE */
- u8 *aRecord; /* old.* database record */
- UnpackedRecord *pUnpacked; /* Unpacked version of aRecord[] */
- UnpackedRecord *pNewUnpacked; /* Unpacked version of new.* record */
- int iNewReg; /* Register for new.* values */
- i64 iKey1; /* First key value passed to hook */
- i64 iKey2; /* Second key value passed to hook */
- Mem *aNew; /* Array of new.* values */
- Table *pTab; /* Schema object being upated */
-};
-
/*
* Function prototypes
*/
diff --git a/src/box/sql/vdbeapi.c b/src/box/sql/vdbeapi.c
index f1068d3..d3a91e2 100644
--- a/src/box/sql/vdbeapi.c
+++ b/src/box/sql/vdbeapi.c
@@ -1574,26 +1574,6 @@ sqlite3_expanded_sql(sqlite3_stmt * pStmt)
#endif
}
-#ifdef SQLITE_ENABLE_PREUPDATE_HOOK
-/*
- * This function is designed to be called from within a pre-update callback
- * only. It returns zero if the change that caused the callback was made
- * immediately by a user SQL statement. Or, if the change was made by a
- * trigger program, it returns the number of trigger programs currently
- * on the stack (1 for a top-level trigger, 2 for a trigger fired by a
- * top-level trigger etc.).
- *
- * For the purposes of the previous paragraph, a foreign key CASCADE, SET NULL
- * or SET DEFAULT action is considered a trigger.
- */
-int
-sqlite3_preupdate_depth(sqlite3 * db)
-{
- PreUpdate *p = db->pPreUpdate;
- return (p ? p->v->nFrame : 0);
-}
-#endif /* SQLITE_ENABLE_PREUPDATE_HOOK */
-
#ifdef SQLITE_ENABLE_STMT_SCANSTATUS
/*
* Return status data for a single loop within query pStmt.
diff --git a/src/box/sql/vdbeaux.c b/src/box/sql/vdbeaux.c
index c71e0fe..d6ff51c 100644
--- a/src/box/sql/vdbeaux.c
+++ b/src/box/sql/vdbeaux.c
@@ -3625,31 +3625,6 @@ sqlite3VdbeSetVarmask(Vdbe * v, int iVar)
}
}
-#ifdef SQLITE_ENABLE_PREUPDATE_HOOK
-
-/*
- * If the second argument is not NULL, release any allocations associated
- * with the memory cells in the p->aMem[] array. Also free the UnpackedRecord
- * structure itself, using sqlite3DbFree().
- *
- * This function is used to free UnpackedRecord structures allocated by
- * the vdbeUnpackRecord() function found in vdbeapi.c.
- */
-static void
-vdbeFreeUnpacked(sqlite3 * db, UnpackedRecord * p)
-{
- if (p) {
- int i;
- for (i = 0; i < p->nField; i++) {
- Mem *pMem = &p->aMem[i];
- if (pMem->zMalloc)
- sqlite3VdbeMemRelease(pMem);
- }
- sqlite3DbFree(db, p);
- }
-}
-#endif /* SQLITE_ENABLE_PREUPDATE_HOOK */
-
i64
sqlite3VdbeMsgpackRecordLen(Mem * pRec, u32 n)
{
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