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Overview
| Comment: | Edit the WHEN and UPDATE OF clauses of trigger programs as part of ALTER TABLE RENAME COLUMN. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | edit-trigger-wrapper |
| Files: | files | file ages | folders |
| SHA3-256: | 5fdb6b0aafba727139e1937ef5950e44 |
| User & Date: | dan 2018-08-13 17:14:26 |
Context
|
2018-08-14
| ||
| 20:18 | Have ALTER TABLE RENAME edit column references in CREATE VIEW statements. check-in: db829dc1 user: dan tags: edit-trigger-wrapper | |
|
2018-08-13
| ||
| 17:14 | Edit the WHEN and UPDATE OF clauses of trigger programs as part of ALTER TABLE RENAME COLUMN. check-in: 5fdb6b0a user: dan tags: edit-trigger-wrapper | |
| 15:09 | Fix legacy comments on Token. Begin commenting the new ALTER TABLE RENAME COLUMN code. Fix a memory leak in the sqlite_rename_column() SQL function. check-in: 32edc892 user: drh tags: alter-table-rename-column | |
Changes
Changes to src/alter.c.
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if( !zNew ) goto exit_rename_column;
assert( pNew->n>0 );
bQuote = sqlite3Isquote(pNew->z[0]);
sqlite3NestedParse(pParse,
"UPDATE \"%w\".%s SET "
"sql = sqlite_rename_column(sql, %d, %d, %Q, %Q, %Q) "
"WHERE name NOT LIKE 'sqlite_%%' AND ("
" type = 'table' OR (type='index' AND tbl_name = %Q)"
")",
zDb, MASTER_NAME, iCol, bQuote, zNew, pTab->zName, zOld, pTab->zName
);
/* Drop and reload the database schema. */
if( pParse->pVdbe ){
sqlite3ChangeCookie(pParse, iSchema);
................................................................................
RenameToken *pNext; /* Next is a list of all RenameToken objects */
};
/*
** The context of an ALTER TABLE RENAME COLUMN operation that gets passed
** down into the Walker.
*/
struct RenameCtx {
RenameToken *pList; /* List of tokens to overwrite */
int nList; /* Number of tokens in pList */
int iCol; /* Index of column being renamed */
};
/*
** Add a new RenameToken object mapping parse tree element pPtr into
** token *pToken to the Parse object currently under construction.
*/
void sqlite3RenameToken(Parse *pParse, void *pPtr, Token *pToken){
................................................................................
RenameToken *p;
for(p=pToken; p; p=pNext){
pNext = p->pNext;
sqlite3DbFree(db, p);
}
}
static RenameToken *renameTokenFind(Parse *pParse, void *pPtr){
RenameToken **pp;
for(pp=&pParse->pRename; (*pp); pp=&(*pp)->pNext){
if( (*pp)->p==pPtr ){
RenameToken *pToken = *pp;
*pp = pToken->pNext;
pToken->pNext = 0;
return pToken;
}
}
return 0;
}
static int renameColumnExprCb(Walker *pWalker, Expr *pExpr){
struct RenameCtx *p = pWalker->u.pRename;
if( pExpr->op==TK_COLUMN && pExpr->iColumn==p->iCol ){
RenameToken *pTok = renameTokenFind(pWalker->pParse, (void*)pExpr);
if( pTok ){
pTok->pNext = p->pList;
p->pList = pTok;
p->nList++;
}
}
return WRC_Continue;
}
static RenameToken *renameColumnTokenNext(struct RenameCtx *pCtx){
RenameToken *pBest = pCtx->pList;
RenameToken *pToken;
RenameToken **pp;
for(pToken=pBest->pNext; pToken; pToken=pToken->pNext){
if( pToken->t.z>pBest->t.z ) pBest = pToken;
}
................................................................................
*/
static void renameColumnFunc(
sqlite3_context *context,
int NotUsed,
sqlite3_value **argv
){
sqlite3 *db = sqlite3_context_db_handle(context);
struct RenameCtx sCtx;
const char *zSql = (const char*)sqlite3_value_text(argv[0]);
int nSql = sqlite3_value_bytes(argv[0]);
int bQuote = sqlite3_value_int(argv[2]);
const char *zNew = (const char*)sqlite3_value_text(argv[3]);
int nNew = sqlite3_value_bytes(argv[3]);
const char *zTable = (const char*)sqlite3_value_text(argv[4]);
const char *zOld = (const char*)sqlite3_value_text(argv[5]);
................................................................................
memset(&sParse, 0, sizeof(sParse));
sParse.eParseMode = PARSE_MODE_RENAME_COLUMN;
sParse.db = db;
sParse.nQueryLoop = 1;
rc = sqlite3RunParser(&sParse, zSql, &zErr);
assert( sParse.pNewTable==0 || sParse.pNewIndex==0 );
if( db->mallocFailed ) rc = SQLITE_NOMEM;
if( rc==SQLITE_OK && sParse.pNewTable==0 && sParse.pNewIndex==0 ){
rc = SQLITE_CORRUPT_BKPT;
}
if( rc==SQLITE_OK ){
zQuot = sqlite3_mprintf("\"%w\"", zNew);
if( zQuot==0 ){
rc = SQLITE_NOMEM;
................................................................................
sWalker.xExprCallback = renameColumnExprCb;
sWalker.u.pRename = &sCtx;
if( sParse.pNewTable ){
int bFKOnly = sqlite3_stricmp(zTable, sParse.pNewTable->zName);
FKey *pFKey;
if( bFKOnly==0 ){
sCtx.pList = renameTokenFind(
&sParse, (void*)sParse.pNewTable->aCol[sCtx.iCol].zName
);
sCtx.nList = 1;
assert( sCtx.iCol>=0 );
if( sParse.pNewTable->iPKey==sCtx.iCol ){
sCtx.iCol = -1;
}
sqlite3WalkExprList(&sWalker, sParse.pNewTable->pCheck);
for(pIdx=sParse.pNewTable->pIndex; pIdx; pIdx=pIdx->pNext){
sqlite3WalkExprList(&sWalker, pIdx->aColExpr);
}
}
for(pFKey=sParse.pNewTable->pFKey; pFKey; pFKey=pFKey->pNextFrom){
for(i=0; i<pFKey->nCol; i++){
RenameToken *pTok = 0;
if( bFKOnly==0 && pFKey->aCol[i].iFrom==sCtx.iCol ){
pTok = renameTokenFind(&sParse, (void*)&pFKey->aCol[i]);
if( pTok ){
pTok->pNext = sCtx.pList;
sCtx.pList = pTok;
sCtx.nList++;
}
}
if( 0==sqlite3_stricmp(pFKey->zTo, zTable)
&& 0==sqlite3_stricmp(pFKey->aCol[i].zCol, zOld)
){
pTok = renameTokenFind(&sParse, (void*)pFKey->aCol[i].zCol);
pTok->pNext = sCtx.pList;
sCtx.pList = pTok;
sCtx.nList++;
}
}
}
}else{
sqlite3WalkExprList(&sWalker, sParse.pNewIndex->aColExpr);
sqlite3WalkExpr(&sWalker, sParse.pNewIndex->pPartIdxWhere);
}
assert( nQuot>=nNew );
zOut = sqlite3DbMallocZero(db, nSql + sCtx.nList*nQuot + 1);
if( zOut ){
int nOut = nSql;
memcpy(zOut, zSql, nSql);
................................................................................
renameColumnFunc_done:
if( sParse.pVdbe ){
sqlite3VdbeFinalize(sParse.pVdbe);
}
sqlite3DeleteTable(db, sParse.pNewTable);
if( sParse.pNewIndex ) sqlite3FreeIndex(db, sParse.pNewIndex);
renameTokenFree(db, sParse.pRename);
renameTokenFree(db, sCtx.pList);
sqlite3ParserReset(&sParse);
sqlite3_free(zQuot);
}
/*
|
| > > | | | > > < | | > > > > > > > | < < < < | > > > | | > | > | | < < | < < < < < | < < < | > > > > > > > > > > > > |
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if( !zNew ) goto exit_rename_column;
assert( pNew->n>0 );
bQuote = sqlite3Isquote(pNew->z[0]);
sqlite3NestedParse(pParse,
"UPDATE \"%w\".%s SET "
"sql = sqlite_rename_column(sql, %d, %d, %Q, %Q, %Q) "
"WHERE name NOT LIKE 'sqlite_%%' AND ("
" type = 'table' OR (type IN ('index', 'trigger') AND tbl_name = %Q)"
")",
zDb, MASTER_NAME, iCol, bQuote, zNew, pTab->zName, zOld, pTab->zName
);
/* Drop and reload the database schema. */
if( pParse->pVdbe ){
sqlite3ChangeCookie(pParse, iSchema);
................................................................................
RenameToken *pNext; /* Next is a list of all RenameToken objects */
};
/*
** The context of an ALTER TABLE RENAME COLUMN operation that gets passed
** down into the Walker.
*/
typedef struct RenameCtx RenameCtx;
struct RenameCtx {
RenameToken *pList; /* List of tokens to overwrite */
int nList; /* Number of tokens in pList */
int iCol; /* Index of column being renamed */
const char *zOld; /* Old column name */
};
/*
** Add a new RenameToken object mapping parse tree element pPtr into
** token *pToken to the Parse object currently under construction.
*/
void sqlite3RenameToken(Parse *pParse, void *pPtr, Token *pToken){
................................................................................
RenameToken *p;
for(p=pToken; p; p=pNext){
pNext = p->pNext;
sqlite3DbFree(db, p);
}
}
static void renameTokenFind(Parse *pParse, RenameCtx *pCtx, void *pPtr){
RenameToken **pp;
for(pp=&pParse->pRename; (*pp); pp=&(*pp)->pNext){
if( (*pp)->p==pPtr ){
RenameToken *pToken = *pp;
*pp = pToken->pNext;
pToken->pNext = pCtx->pList;
pCtx->pList = pToken;
pCtx->nList++;
break;
}
}
}
static int renameColumnExprCb(Walker *pWalker, Expr *pExpr){
RenameCtx *p = pWalker->u.pRename;
if( p->zOld && pExpr->op==TK_DOT ){
Expr *pLeft = pExpr->pLeft;
Expr *pRight = pExpr->pRight;
assert( pLeft->op==TK_ID && pRight->op==TK_ID );
if( 0==sqlite3_stricmp(pLeft->u.zToken, "old")
|| 0==sqlite3_stricmp(pLeft->u.zToken, "new")
){
if( 0==sqlite3_stricmp(pRight->u.zToken, p->zOld) ){
renameTokenFind(pWalker->pParse, p, (void*)pRight);
}
}
}else if( pExpr->op==TK_COLUMN && pExpr->iColumn==p->iCol ){
renameTokenFind(pWalker->pParse, p, (void*)pExpr);
}
return WRC_Continue;
}
static RenameToken *renameColumnTokenNext(RenameCtx *pCtx){
RenameToken *pBest = pCtx->pList;
RenameToken *pToken;
RenameToken **pp;
for(pToken=pBest->pNext; pToken; pToken=pToken->pNext){
if( pToken->t.z>pBest->t.z ) pBest = pToken;
}
................................................................................
*/
static void renameColumnFunc(
sqlite3_context *context,
int NotUsed,
sqlite3_value **argv
){
sqlite3 *db = sqlite3_context_db_handle(context);
RenameCtx sCtx;
const char *zSql = (const char*)sqlite3_value_text(argv[0]);
int nSql = sqlite3_value_bytes(argv[0]);
int bQuote = sqlite3_value_int(argv[2]);
const char *zNew = (const char*)sqlite3_value_text(argv[3]);
int nNew = sqlite3_value_bytes(argv[3]);
const char *zTable = (const char*)sqlite3_value_text(argv[4]);
const char *zOld = (const char*)sqlite3_value_text(argv[5]);
................................................................................
memset(&sParse, 0, sizeof(sParse));
sParse.eParseMode = PARSE_MODE_RENAME_COLUMN;
sParse.db = db;
sParse.nQueryLoop = 1;
rc = sqlite3RunParser(&sParse, zSql, &zErr);
assert( sParse.pNewTable==0 || sParse.pNewIndex==0 );
if( db->mallocFailed ) rc = SQLITE_NOMEM;
if( rc==SQLITE_OK
&& sParse.pNewTable==0 && sParse.pNewIndex==0 && sParse.pNewTrigger==0
){
rc = SQLITE_CORRUPT_BKPT;
}
if( rc==SQLITE_OK ){
zQuot = sqlite3_mprintf("\"%w\"", zNew);
if( zQuot==0 ){
rc = SQLITE_NOMEM;
................................................................................
sWalker.xExprCallback = renameColumnExprCb;
sWalker.u.pRename = &sCtx;
if( sParse.pNewTable ){
int bFKOnly = sqlite3_stricmp(zTable, sParse.pNewTable->zName);
FKey *pFKey;
if( bFKOnly==0 ){
renameTokenFind(
&sParse, &sCtx, (void*)sParse.pNewTable->aCol[sCtx.iCol].zName
);
assert( sCtx.iCol>=0 );
if( sParse.pNewTable->iPKey==sCtx.iCol ){
sCtx.iCol = -1;
}
sqlite3WalkExprList(&sWalker, sParse.pNewTable->pCheck);
for(pIdx=sParse.pNewTable->pIndex; pIdx; pIdx=pIdx->pNext){
sqlite3WalkExprList(&sWalker, pIdx->aColExpr);
}
}
for(pFKey=sParse.pNewTable->pFKey; pFKey; pFKey=pFKey->pNextFrom){
for(i=0; i<pFKey->nCol; i++){
if( bFKOnly==0 && pFKey->aCol[i].iFrom==sCtx.iCol ){
renameTokenFind(&sParse, &sCtx, (void*)&pFKey->aCol[i]);
}
if( 0==sqlite3_stricmp(pFKey->zTo, zTable)
&& 0==sqlite3_stricmp(pFKey->aCol[i].zCol, zOld)
){
renameTokenFind(&sParse, &sCtx, (void*)pFKey->aCol[i].zCol);
}
}
}
}else if( sParse.pNewIndex ){
sqlite3WalkExprList(&sWalker, sParse.pNewIndex->aColExpr);
sqlite3WalkExpr(&sWalker, sParse.pNewIndex->pPartIdxWhere);
}else{
sCtx.zOld = zOld;
sqlite3WalkExpr(&sWalker, sParse.pNewTrigger->pWhen);
if( sParse.pNewTrigger->pColumns ){
for(i=0; i<sParse.pNewTrigger->pColumns->nId; i++){
char *zName = sParse.pNewTrigger->pColumns->a[i].zName;
if( 0==sqlite3_stricmp(zName, zOld) ){
renameTokenFind(&sParse, &sCtx, (void*)zName);
}
}
}
}
assert( nQuot>=nNew );
zOut = sqlite3DbMallocZero(db, nSql + sCtx.nList*nQuot + 1);
if( zOut ){
int nOut = nSql;
memcpy(zOut, zSql, nSql);
................................................................................
renameColumnFunc_done:
if( sParse.pVdbe ){
sqlite3VdbeFinalize(sParse.pVdbe);
}
sqlite3DeleteTable(db, sParse.pNewTable);
if( sParse.pNewIndex ) sqlite3FreeIndex(db, sParse.pNewIndex);
sqlite3DeleteTrigger(db, sParse.pNewTrigger);
renameTokenFree(db, sParse.pRename);
renameTokenFree(db, sCtx.pList);
sqlite3ParserReset(&sParse);
sqlite3_free(zQuot);
}
/*
|
Changes to src/build.c.
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/* ** Append a new element to the given IdList. Create a new IdList if ** need be. ** ** A new IdList is returned, or NULL if malloc() fails. */ IdList *sqlite3IdListAppend(sqlite3 *db, IdList *pList, Token *pToken){ int i; if( pList==0 ){ pList = sqlite3DbMallocZero(db, sizeof(IdList) ); if( pList==0 ) return 0; } pList->a = sqlite3ArrayAllocate( db, ................................................................................ &i ); if( i<0 ){ sqlite3IdListDelete(db, pList); return 0; } pList->a[i].zName = sqlite3NameFromToken(db, pToken); return pList; } /* ** Delete an IdList. */ void sqlite3IdListDelete(sqlite3 *db, IdList *pList){ |
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/* ** Append a new element to the given IdList. Create a new IdList if ** need be. ** ** A new IdList is returned, or NULL if malloc() fails. */ IdList *sqlite3IdListAppend(Parse *pParse, IdList *pList, Token *pToken){ sqlite3 *db = pParse->db; int i; if( pList==0 ){ pList = sqlite3DbMallocZero(db, sizeof(IdList) ); if( pList==0 ) return 0; } pList->a = sqlite3ArrayAllocate( db, ................................................................................ &i ); if( i<0 ){ sqlite3IdListDelete(db, pList); return 0; } pList->a[i].zName = sqlite3NameFromToken(db, pToken); if( IN_RENAME_COLUMN && pList->a[i].zName ){ sqlite3RenameToken(pParse, (void*)pList->a[i].zName, pToken); } return pList; } /* ** Delete an IdList. */ void sqlite3IdListDelete(sqlite3 *db, IdList *pList){ |
Changes to src/parse.y.
904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 |
%destructor idlist_opt {sqlite3IdListDelete(pParse->db, $$);}
%type idlist {IdList*}
%destructor idlist {sqlite3IdListDelete(pParse->db, $$);}
idlist_opt(A) ::= . {A = 0;}
idlist_opt(A) ::= LP idlist(X) RP. {A = X;}
idlist(A) ::= idlist(A) COMMA nm(Y).
{A = sqlite3IdListAppend(pParse->db,A,&Y);}
idlist(A) ::= nm(Y).
{A = sqlite3IdListAppend(pParse->db,0,&Y); /*A-overwrites-Y*/}
/////////////////////////// Expression Processing /////////////////////////////
//
%type expr {Expr*}
%destructor expr {sqlite3ExprDelete(pParse->db, $$);}
%type term {Expr*}
|
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%destructor idlist_opt {sqlite3IdListDelete(pParse->db, $$);}
%type idlist {IdList*}
%destructor idlist {sqlite3IdListDelete(pParse->db, $$);}
idlist_opt(A) ::= . {A = 0;}
idlist_opt(A) ::= LP idlist(X) RP. {A = X;}
idlist(A) ::= idlist(A) COMMA nm(Y).
{A = sqlite3IdListAppend(pParse,A,&Y);}
idlist(A) ::= nm(Y).
{A = sqlite3IdListAppend(pParse,0,&Y); /*A-overwrites-Y*/}
/////////////////////////// Expression Processing /////////////////////////////
//
%type expr {Expr*}
%destructor expr {sqlite3ExprDelete(pParse->db, $$);}
%type term {Expr*}
|
Changes to src/sqliteInt.h.
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void sqlite3AutoincrementEnd(Parse *pParse);
#else
# define sqlite3AutoincrementBegin(X)
# define sqlite3AutoincrementEnd(X)
#endif
void sqlite3Insert(Parse*, SrcList*, Select*, IdList*, int, Upsert*);
void *sqlite3ArrayAllocate(sqlite3*,void*,int,int*,int*);
IdList *sqlite3IdListAppend(sqlite3*, IdList*, Token*);
int sqlite3IdListIndex(IdList*,const char*);
SrcList *sqlite3SrcListEnlarge(sqlite3*, SrcList*, int, int);
SrcList *sqlite3SrcListAppend(sqlite3*, SrcList*, Token*, Token*);
SrcList *sqlite3SrcListAppendFromTerm(Parse*, SrcList*, Token*, Token*,
Token*, Select*, Expr*, IdList*);
void sqlite3SrcListIndexedBy(Parse *, SrcList *, Token *);
void sqlite3SrcListFuncArgs(Parse*, SrcList*, ExprList*);
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void sqlite3AutoincrementEnd(Parse *pParse);
#else
# define sqlite3AutoincrementBegin(X)
# define sqlite3AutoincrementEnd(X)
#endif
void sqlite3Insert(Parse*, SrcList*, Select*, IdList*, int, Upsert*);
void *sqlite3ArrayAllocate(sqlite3*,void*,int,int*,int*);
IdList *sqlite3IdListAppend(Parse*, IdList*, Token*);
int sqlite3IdListIndex(IdList*,const char*);
SrcList *sqlite3SrcListEnlarge(sqlite3*, SrcList*, int, int);
SrcList *sqlite3SrcListAppend(sqlite3*, SrcList*, Token*, Token*);
SrcList *sqlite3SrcListAppendFromTerm(Parse*, SrcList*, Token*, Token*,
Token*, Select*, Expr*, IdList*);
void sqlite3SrcListIndexedBy(Parse *, SrcList *, Token *);
void sqlite3SrcListFuncArgs(Parse*, SrcList*, ExprList*);
|
Changes to src/tokenize.c.
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if( !IN_SPECIAL_PARSE ){
/* If the pParse->declareVtab flag is set, do not delete any table
** structure built up in pParse->pNewTable. The calling code (see vtab.c)
** will take responsibility for freeing the Table structure.
*/
sqlite3DeleteTable(db, pParse->pNewTable);
}
if( pParse->pWithToFree ) sqlite3WithDelete(db, pParse->pWithToFree);
sqlite3DeleteTrigger(db, pParse->pNewTrigger);
sqlite3DbFree(db, pParse->pVList);
while( pParse->pAinc ){
AutoincInfo *p = pParse->pAinc;
pParse->pAinc = p->pNext;
sqlite3DbFreeNN(db, p);
}
while( pParse->pZombieTab ){
|
> > | > < |
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if( !IN_SPECIAL_PARSE ){
/* If the pParse->declareVtab flag is set, do not delete any table
** structure built up in pParse->pNewTable. The calling code (see vtab.c)
** will take responsibility for freeing the Table structure.
*/
sqlite3DeleteTable(db, pParse->pNewTable);
}
if( !IN_RENAME_COLUMN ){
sqlite3DeleteTrigger(db, pParse->pNewTrigger);
}
if( pParse->pWithToFree ) sqlite3WithDelete(db, pParse->pWithToFree);
sqlite3DbFree(db, pParse->pVList);
while( pParse->pAinc ){
AutoincInfo *p = pParse->pAinc;
pParse->pAinc = p->pNext;
sqlite3DbFreeNN(db, p);
}
while( pParse->pZombieTab ){
|
Changes to src/trigger.c.
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/* Check that the trigger name is not reserved and that no trigger of the
** specified name exists */
zName = sqlite3NameFromToken(db, pName);
if( !zName || SQLITE_OK!=sqlite3CheckObjectName(pParse, zName) ){
goto trigger_cleanup;
}
assert( sqlite3SchemaMutexHeld(db, iDb, 0) );
if( sqlite3HashFind(&(db->aDb[iDb].pSchema->trigHash),zName) ){
if( !noErr ){
sqlite3ErrorMsg(pParse, "trigger %T already exists", pName);
}else{
assert( !db->init.busy );
sqlite3CodeVerifySchema(pParse, iDb);
}
goto trigger_cleanup;
}
/* Do not create a trigger on a system table */
if( sqlite3StrNICmp(pTab->zName, "sqlite_", 7)==0 ){
sqlite3ErrorMsg(pParse, "cannot create trigger on system table");
goto trigger_cleanup;
}
................................................................................
if( !pTab->pSelect && tr_tm==TK_INSTEAD ){
sqlite3ErrorMsg(pParse, "cannot create INSTEAD OF"
" trigger on table: %S", pTableName, 0);
goto trigger_cleanup;
}
#ifndef SQLITE_OMIT_AUTHORIZATION
{
int iTabDb = sqlite3SchemaToIndex(db, pTab->pSchema);
int code = SQLITE_CREATE_TRIGGER;
const char *zDb = db->aDb[iTabDb].zDbSName;
const char *zDbTrig = isTemp ? db->aDb[1].zDbSName : zDb;
if( iTabDb==1 || isTemp ) code = SQLITE_CREATE_TEMP_TRIGGER;
if( sqlite3AuthCheck(pParse, code, zName, pTab->zName, zDbTrig) ){
goto trigger_cleanup;
................................................................................
pTrigger->zName = zName;
zName = 0;
pTrigger->table = sqlite3DbStrDup(db, pTableName->a[0].zName);
pTrigger->pSchema = db->aDb[iDb].pSchema;
pTrigger->pTabSchema = pTab->pSchema;
pTrigger->op = (u8)op;
pTrigger->tr_tm = tr_tm==TK_BEFORE ? TRIGGER_BEFORE : TRIGGER_AFTER;
pTrigger->pWhen = sqlite3ExprDup(db, pWhen, EXPRDUP_REDUCE);
pTrigger->pColumns = sqlite3IdListDup(db, pColumns);
assert( pParse->pNewTrigger==0 );
pParse->pNewTrigger = pTrigger;
trigger_cleanup:
sqlite3DbFree(db, zName);
sqlite3SrcListDelete(db, pTableName);
sqlite3IdListDelete(db, pColumns);
................................................................................
sqlite3TokenInit(&nameToken, pTrig->zName);
sqlite3FixInit(&sFix, pParse, iDb, "trigger", &nameToken);
if( sqlite3FixTriggerStep(&sFix, pTrig->step_list)
|| sqlite3FixExpr(&sFix, pTrig->pWhen)
){
goto triggerfinish_cleanup;
}
/* if we are not initializing,
** build the sqlite_master entry
*/
if( !db->init.busy ){
Vdbe *v;
char *z;
................................................................................
pLink->pNext = pTab->pTrigger;
pTab->pTrigger = pLink;
}
}
triggerfinish_cleanup:
sqlite3DeleteTrigger(db, pTrig);
assert( !pParse->pNewTrigger );
sqlite3DeleteTriggerStep(db, pStepList);
}
/*
** Duplicate a range of text from an SQL statement, then convert all
** whitespace characters into ordinary space characters.
*/
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/* Check that the trigger name is not reserved and that no trigger of the
** specified name exists */
zName = sqlite3NameFromToken(db, pName);
if( !zName || SQLITE_OK!=sqlite3CheckObjectName(pParse, zName) ){
goto trigger_cleanup;
}
assert( sqlite3SchemaMutexHeld(db, iDb, 0) );
if( !IN_RENAME_COLUMN ){
if( sqlite3HashFind(&(db->aDb[iDb].pSchema->trigHash),zName) ){
if( !noErr ){
sqlite3ErrorMsg(pParse, "trigger %T already exists", pName);
}else{
assert( !db->init.busy );
sqlite3CodeVerifySchema(pParse, iDb);
}
goto trigger_cleanup;
}
}
/* Do not create a trigger on a system table */
if( sqlite3StrNICmp(pTab->zName, "sqlite_", 7)==0 ){
sqlite3ErrorMsg(pParse, "cannot create trigger on system table");
goto trigger_cleanup;
}
................................................................................
if( !pTab->pSelect && tr_tm==TK_INSTEAD ){
sqlite3ErrorMsg(pParse, "cannot create INSTEAD OF"
" trigger on table: %S", pTableName, 0);
goto trigger_cleanup;
}
#ifndef SQLITE_OMIT_AUTHORIZATION
if( !IN_RENAME_COLUMN ){
int iTabDb = sqlite3SchemaToIndex(db, pTab->pSchema);
int code = SQLITE_CREATE_TRIGGER;
const char *zDb = db->aDb[iTabDb].zDbSName;
const char *zDbTrig = isTemp ? db->aDb[1].zDbSName : zDb;
if( iTabDb==1 || isTemp ) code = SQLITE_CREATE_TEMP_TRIGGER;
if( sqlite3AuthCheck(pParse, code, zName, pTab->zName, zDbTrig) ){
goto trigger_cleanup;
................................................................................
pTrigger->zName = zName;
zName = 0;
pTrigger->table = sqlite3DbStrDup(db, pTableName->a[0].zName);
pTrigger->pSchema = db->aDb[iDb].pSchema;
pTrigger->pTabSchema = pTab->pSchema;
pTrigger->op = (u8)op;
pTrigger->tr_tm = tr_tm==TK_BEFORE ? TRIGGER_BEFORE : TRIGGER_AFTER;
if( IN_RENAME_COLUMN ){
pTrigger->pWhen = pWhen;
pWhen = 0;
}else{
pTrigger->pWhen = sqlite3ExprDup(db, pWhen, EXPRDUP_REDUCE);
}
pTrigger->pColumns = pColumns;
pColumns = 0;
assert( pParse->pNewTrigger==0 );
pParse->pNewTrigger = pTrigger;
trigger_cleanup:
sqlite3DbFree(db, zName);
sqlite3SrcListDelete(db, pTableName);
sqlite3IdListDelete(db, pColumns);
................................................................................
sqlite3TokenInit(&nameToken, pTrig->zName);
sqlite3FixInit(&sFix, pParse, iDb, "trigger", &nameToken);
if( sqlite3FixTriggerStep(&sFix, pTrig->step_list)
|| sqlite3FixExpr(&sFix, pTrig->pWhen)
){
goto triggerfinish_cleanup;
}
#ifndef SQLITE_OMIT_ALTERTABLE
if( IN_RENAME_COLUMN ){
assert( !db->init.busy );
pParse->pNewTrigger = pTrig;
pTrig = 0;
}else
#endif
/* if we are not initializing,
** build the sqlite_master entry
*/
if( !db->init.busy ){
Vdbe *v;
char *z;
................................................................................
pLink->pNext = pTab->pTrigger;
pTab->pTrigger = pLink;
}
}
triggerfinish_cleanup:
sqlite3DeleteTrigger(db, pTrig);
assert( IN_RENAME_COLUMN || !pParse->pNewTrigger );
sqlite3DeleteTriggerStep(db, pStepList);
}
/*
** Duplicate a range of text from an SQL statement, then convert all
** whitespace characters into ordinary space characters.
*/
|
Changes to test/altercol.test.
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db close
sqlite3 db test.db
do_execsql_test 3.2 {
SELECT * FROM t4;
} {3 2 1}
# do_execsql_test 3.3 { INSERT INTO t4 VALUES(6, 5, 4); } {}
#-------------------------------------------------------------------------
#
do_execsql_test 4.0 {
CREATE TABLE c1(a, b, FOREIGN KEY (a, b) REFERENCES p1(c, d));
CREATE TABLE p1(c, d, PRIMARY KEY(c, d));
PRAGMA foreign_keys = 1;
................................................................................
do_catchsql_test 6.2 {
ALTER TABLE "blob" RENAME COLUMN "a1" TO [where];
} {0 {}}
do_execsql_test 6.3 {
SELECT "where" FROM blob;
} {}
finish_test
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db close
sqlite3 db test.db
do_execsql_test 3.2 {
SELECT * FROM t4;
} {3 2 1}
do_execsql_test 3.3 { INSERT INTO t4 VALUES(6, 5, 4); } {}
#-------------------------------------------------------------------------
#
do_execsql_test 4.0 {
CREATE TABLE c1(a, b, FOREIGN KEY (a, b) REFERENCES p1(c, d));
CREATE TABLE p1(c, d, PRIMARY KEY(c, d));
PRAGMA foreign_keys = 1;
................................................................................
do_catchsql_test 6.2 {
ALTER TABLE "blob" RENAME COLUMN "a1" TO [where];
} {0 {}}
do_execsql_test 6.3 {
SELECT "where" FROM blob;
} {}
#-------------------------------------------------------------------------
#
reset_db
do_execsql_test 7.0 {
CREATE TABLE c(x);
INSERT INTO c VALUES(0);
CREATE TABLE t6("col a", "col b", "col c");
CREATE TRIGGER zzz AFTER UPDATE OF "col a", "col c" ON t6 BEGIN
UPDATE c SET x=x+1;
END;
}
do_execsql_test 7.1 {
INSERT INTO t6 VALUES(0, 0, 0);
UPDATE t6 SET "col c" = 1;
SELECT * FROM c;
} {1}
do_execsql_test 7.2 {
ALTER TABLE t6 RENAME "col c" TO "col 3";
}
do_execsql_test 7.3 {
UPDATE t6 SET "col 3" = 0;
SELECT * FROM c;
} {2}
finish_test
|