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Add new sqlite3_prepare_v3() flag SQLITE_PREPARE_NO_VTAB, for preparing

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statements that are not allowed to use any virtual tables. Use this to prevent
circular references in triggers on virtual table shadow tables from causing
resource leaks.

FossilOrigin-Name: 25666e3d03950caf753295cdb55df162e07dbcf6840b05875c6e0b127c469ecb
This commit is contained in:
dan
2018-12-21 19:29:11 +00:00
parent afdc9e23fc
commit 1ea0443c2d
11 changed files with 68 additions and 47 deletions
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ext/fts3/fts3_write.c
+3 -2
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@@ -396,10 +396,12 @@ static int fts3SqlStmt(
pStmt = p->aStmt[eStmt];
if( !pStmt ){
int f = SQLITE_PREPARE_PERSISTENT|SQLITE_PREPARE_NO_VTAB;
char *zSql;
if( eStmt==SQL_CONTENT_INSERT ){
zSql = sqlite3_mprintf(azSql[eStmt], p->zDb, p->zName, p->zWriteExprlist);
}else if( eStmt==SQL_SELECT_CONTENT_BY_ROWID ){
f &= ~SQLITE_PREPARE_NO_VTAB;
zSql = sqlite3_mprintf(azSql[eStmt], p->zReadExprlist);
}else{
zSql = sqlite3_mprintf(azSql[eStmt], p->zDb, p->zName);
@@ -407,8 +409,7 @@ static int fts3SqlStmt(
if( !zSql ){
rc = SQLITE_NOMEM;
}else{
rc = sqlite3_prepare_v3(p->db, zSql, -1, SQLITE_PREPARE_PERSISTENT,
&pStmt, NULL);
rc = sqlite3_prepare_v3(p->db, zSql, -1, f, &pStmt, NULL);
sqlite3_free(zSql);
assert( rc==SQLITE_OK || pStmt==0 );
p->aStmt[eStmt] = pStmt;