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Overview
| Comment: | Avoid incorrectly replacing tokens that refer to a column being renamed via an alias. For example, do not overwrite "xyz" when "a" is renamed in "CREATE VIEW v1 AS SELECT a AS xyz FROM tbl WHERE xyz=1" |
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| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | alter-table-rename-column |
| Files: | files | file ages | folders |
| SHA3-256: |
ad072a835f97ff418f5919d94f547ce8 |
| User & Date: | dan 2018-08-24 16:04:26 |
Context
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2018-08-24
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| 17:55 | After modifying and reparsing the schema as part of an ALTER TABLE RENAME COLUMN, check that no new schema errors have been introduced (e.g. ambiguous column names in views) before committing the operation. check-in: a0e06d2c5e user: dan tags: alter-table-rename-column | |
| 16:04 | Avoid incorrectly replacing tokens that refer to a column being renamed via an alias. For example, do not overwrite "xyz" when "a" is renamed in "CREATE VIEW v1 AS SELECT a AS xyz FROM tbl WHERE xyz=1" check-in: ad072a835f user: dan tags: alter-table-rename-column | |
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2018-08-23
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| 20:09 | Add the "atrc" test program to the Makefiles. Fix a typo in the instructions in the header comment of the atrc program. check-in: 2130a407dd user: drh tags: alter-table-rename-column | |
Changes
Changes to src/alter.c.
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RenameToken *p;
for(p=pParse->pRename; ALWAYS(p); p=p->pNext){
if( p->p==pFrom ){
p->p = pTo;
break;
}
}
assert( p );
}
/*
** Free the list of RenameToken objects given in the second argument
*/
static void renameTokenFree(sqlite3 *db, RenameToken *pToken){
RenameToken *pNext;
................................................................................
** Search the Parse object passed as the first argument for a RenameToken
** object associated with parse tree element pPtr. If found, remove it
** from the Parse object and add it to the list maintained by the
** RenameCtx object passed as the second argument.
*/
static void renameTokenFind(Parse *pParse, struct 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++;
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RenameToken *p;
for(p=pParse->pRename; ALWAYS(p); p=p->pNext){
if( p->p==pFrom ){
p->p = pTo;
break;
}
}
assert( pTo==0 || p );
}
/*
** Free the list of RenameToken objects given in the second argument
*/
static void renameTokenFree(sqlite3 *db, RenameToken *pToken){
RenameToken *pNext;
................................................................................
** Search the Parse object passed as the first argument for a RenameToken
** object associated with parse tree element pPtr. If found, remove it
** from the Parse object and add it to the list maintained by the
** RenameCtx object passed as the second argument.
*/
static void renameTokenFind(Parse *pParse, struct RenameCtx *pCtx, void *pPtr){
RenameToken **pp;
assert( pPtr!=0 );
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++;
|
Changes to src/resolve.c.
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sqlite3ErrorMsg(pParse, "row value misused");
return WRC_Abort;
}
resolveAlias(pParse, pEList, j, pExpr, "", nSubquery);
cnt = 1;
pMatch = 0;
assert( zTab==0 && zDb==0 );
goto lookupname_end;
}
}
}
/* Advance to the next name context. The loop will exit when either
** we have a match (cnt>0) or when we run out of name contexts.
|
> > > |
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sqlite3ErrorMsg(pParse, "row value misused");
return WRC_Abort;
}
resolveAlias(pParse, pEList, j, pExpr, "", nSubquery);
cnt = 1;
pMatch = 0;
assert( zTab==0 && zDb==0 );
if( IN_RENAME_COLUMN ){
sqlite3RenameTokenRemap(pParse, 0, (void*)pExpr);
}
goto lookupname_end;
}
}
}
/* Advance to the next name context. The loop will exit when either
** we have a match (cnt>0) or when we run out of name contexts.
|
Changes to test/altercol.test.
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do_execsql_test 14.2 {
SELECT
sqlite_rename_column(sql, type, object, db, tbl, icol, znew, bquote)
FROM ddd;
} {{} {} {}}
finish_test
|
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do_execsql_test 14.2 {
SELECT
sqlite_rename_column(sql, type, object, db, tbl, icol, znew, bquote)
FROM ddd;
} {{} {} {}}
#-------------------------------------------------------------------------
#
reset_db
do_execsql_test 15.0 {
CREATE TABLE xxx(a, b, c);
SELECT a AS d FROM xxx WHERE d=0;
}
do_execsql_test 15.1 {
CREATE VIEW vvv AS SELECT a AS d FROM xxx WHERE d=0;
ALTER TABLE xxx RENAME a TO xyz;
}
do_execsql_test 15.2 {
SELECT sql FROM sqlite_master WHERE type='view';
} {{CREATE VIEW vvv AS SELECT xyz AS d FROM xxx WHERE d=0}}
finish_test
|