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|
** single row:
**
** "tbl" -> Table currently being written (target database names).
**
** "idx" -> Index currently being written (target database names).
** Or, if the main table is being written, a NULL value.
**
** "row" -> Last rowid processed from ota database table (i.e. data_%).
** "row" -> Number of rows for this object already processed
**
** "progress" -> total number of key/value b-tree operations performed
** so far as part of this ota update.
*/
#define OTA_CREATE_STATE "CREATE TABLE IF NOT EXISTS ota_state" \
"(tbl, idx, row, progress)"
typedef struct OtaTblIter OtaTblIter;
typedef struct OtaIdxIter OtaIdxIter;
typedef struct OtaState OtaState;
typedef struct OtaState OtaState;
typedef struct OtaObjIter OtaObjIter;
typedef unsigned char u8;
/*
** A structure to store values read from the ota_state table in memory.
*/
struct OtaState {
char *zTbl;
char *zIdx;
int nRow;
};
/*
** Iterator used to iterate through all data tables in the OTA. As follows:
** An iterator of this type is used to iterate through all objects in
** the target database that require updating. For each such table, the
** iterator visits, in order:
**
** OtaTblIter iter;
** for(rc=tblIterFirst(db, &iter);
** rc==SQLITE_OK && iter.zTarget;
** rc=tblIterNext(&iter)
** ){
** }
** * the table itself,
** * each index of the table (zero or more points to visit), and
** * a special "cleanup table" point.
*/
struct OtaTblIter {
struct OtaObjIter {
sqlite3_stmt *pTblIter; /* Iterate through tables */
int iEntry; /* Index of current entry (from 1) */
sqlite3_stmt *pIdxIter; /* Index iterator */
/* Output varibles. zTarget==0 implies EOF. */
const char *zTarget; /* Name of target table */
const char *zSource; /* Name of source table */
/* Useful things populated by a call to tblIterPrepareAll() */
int nCol; /* Number of columns in this table */
char **azCol; /* Array of quoted column names */
sqlite3_stmt *pSelect; /* PK b-tree SELECT statement */
int nTblCol; /* Size of azTblCol[] array */
char **azTblCol; /* Array of quoted column names */
u8 *abTblPk; /* Array of flags - true for PK columns */
sqlite3_stmt *pInsert; /* PK b-tree INSERT statement */
};
/*
/* Output variables. zTbl==0 implies EOF. */
** API is:
**
** idxIterFirst()
** idxIterNext()
** idxIterFinalize()
** idxIterPrepareAll()
*/
struct OtaIdxIter {
sqlite3_stmt *pIdxIter; /* Iterate through indexes */
int iEntry; /* Index of current entry (from 1) */
int bCleanup; /* True in "cleanup" state */
const char *zTbl; /* Name of target db table */
const char *zIdx; /* Name of target db index (or null) */
/* Output varibles. zTarget==0 implies EOF. */
const char *zIndex; /* Name of index */
int iVisit; /* Number of points visited, incl. current */
/* Statements created by otaObjIterPrepareAll() */
int nCol; /* Number of columns in index */
int nCol; /* Number of columns in current object */
int *aiCol; /* Array of column indexes */
sqlite3_stmt *pWriter; /* Index writer */
sqlite3_stmt *pSelect; /* Select to read values in index order */
sqlite3_stmt *pSelect; /* Source data */
};
sqlite3_stmt *pInsert; /* Statement for INSERT operations */
struct OtaState {
char *zTbl;
char *zIdx;
sqlite3_int64 iRow;
};
/*
** OTA handle.
*/
struct sqlite3ota {
sqlite3 *dbDest; /* Target db */
sqlite3 *dbOta; /* Ota db */
char *zTarget; /* Path to target db */
int rc; /* Value returned by last ota_step() call */
char *zErrmsg; /* Error message if rc!=SQLITE_OK */
OtaTblIter tbliter; /* Used to iterate through tables */
OtaIdxIter idxiter; /* Used to iterate through indexes */
int nStep; /* Rows processed for current object */
OtaObjIter objiter;
};
/*
** Prepare the SQL statement in buffer zSql against database handle db.
** If successful, set *ppStmt to point to the new statement and return
** SQLITE_OK.
**
** Otherwise, if an error does occur, set *ppStmt to NULL and return
** an SQLite error code. Additionally, set output variable *pzErrmsg to
** point to a buffer containing an error message. It is the responsibility
** of the caller to (eventually) free this buffer using sqlite3_free().
*/
static int prepareAndCollectError(
sqlite3 *db,
const char *zSql,
sqlite3_stmt **ppStmt,
char **pzErrmsg
char **pzErrmsg,
const char *zSql
){
int rc = sqlite3_prepare_v2(db, zSql, -1, ppStmt, 0);
if( rc!=SQLITE_OK ){
*pzErrmsg = sqlite3_mprintf("%s", sqlite3_errmsg(db));
*ppStmt = 0;
}
return rc;
}
/*
** Reset the SQL statement passed as the first argument. Return a copy
** of the value returned by sqlite3_reset().
**
** If an error has occurred, then set *pzErrmsg to point to a buffer
** containing an error message. It is the responsibility of the caller
** to eventually free this buffer using sqlite3_free().
*/
static int resetAndCollectError(sqlite3_stmt *pStmt, char **pzErrmsg){
int rc = sqlite3_reset(pStmt);
if( rc!=SQLITE_OK ){
*pzErrmsg = sqlite3_mprintf("%s", sqlite3_errmsg(sqlite3_db_handle(pStmt)));
}
return rc;
}
/*
** Unless it is NULL, argument zSql points to a buffer allocated using
** sqlite3_malloc containing an SQL statement. This function prepares the SQL
** statement against database db and frees the buffer. If statement
** compilation is successful, *ppStmt is set to point to the new statement
** handle and SQLITE_OK is returned.
**
** Otherwise, if an error occurs, *ppStmt is set to NULL and an error code
** returned. In this case, *pzErrmsg may also be set to point to an error
** message. It is the responsibility of the caller to free this error message
** buffer using sqlite3_free().
**
** If argument zSql is NULL, this function assumes that an OOM has occurred.
** In this case SQLITE_NOMEM is returned and *ppStmt set to NULL.
*/
static int prepareFreeAndCollectError(
sqlite3 *db,
char *zSql,
sqlite3_stmt **ppStmt,
char **pzErrmsg
char **pzErrmsg,
char *zSql
){
int rc;
assert( *pzErrmsg==0 );
if( zSql==0 ){
rc = SQLITE_NOMEM;
*ppStmt = 0;
}else{
rc = prepareAndCollectError(db, zSql, ppStmt, pzErrmsg);
rc = prepareAndCollectError(db, ppStmt, pzErrmsg, zSql);
sqlite3_free(zSql);
}
return rc;
}
/*
** Free the OtaObjIter.azTblCol[] and OtaObjIter.abTblPk[] arrays allocated
** by an earlier call to otaObjIterGetCols().
*/
static void otaObjIterFreeCols(OtaObjIter *pIter){
int i;
for(i=0; i<pIter->nTblCol; i++){
sqlite3_free(pIter->azTblCol[i]);
}
sqlite3_free(pIter->azTblCol);
sqlite3_free(pIter->abTblPk);
pIter->azTblCol = 0;
pIter->abTblPk = 0;
pIter->nTblCol = 0;
}
/*
** Clean up any resources allocated as part of the iterator object passed
** as the only argument.
*/
static void otaObjIterFinalize(OtaObjIter *pIter){
sqlite3_finalize(pIter->pTblIter);
sqlite3_finalize(pIter->pIdxIter);
sqlite3_finalize(pIter->pSelect);
sqlite3_finalize(pIter->pInsert);
otaObjIterFreeCols(pIter);
memset(pIter, 0, sizeof(OtaObjIter));
}
/*
** Advance the iterator to the next position.
**
** If no error occurs, SQLITE_OK is returned and the iterator is left
** pointing to the next entry. Otherwise, an error code and message is
** left in the OTA handle passed as the first argument. A copy of the
** error code is returned.
*/
static int otaObjIterNext(sqlite3ota *p, OtaObjIter *pIter){
int rc = p->rc;
if( rc==SQLITE_OK ){
/* Free any SQLite statements used while processing the previous object */
sqlite3_finalize(pIter->pSelect);
sqlite3_finalize(pIter->pInsert);
pIter->pSelect = 0;
pIter->pInsert = 0;
pIter->nCol = 0;
if( pIter->bCleanup ){
otaObjIterFreeCols(pIter);
pIter->bCleanup = 0;
rc = sqlite3_step(pIter->pTblIter);
if( rc!=SQLITE_ROW ){
rc = sqlite3_reset(pIter->pTblIter);
pIter->zTbl = 0;
}else{
pIter->zTbl = (const char*)sqlite3_column_text(pIter->pTblIter, 0);
rc = SQLITE_OK;
}
}else{
if( pIter->zIdx==0 ){
sqlite3_bind_text(pIter->pIdxIter, 1, pIter->zTbl, -1, SQLITE_STATIC);
}
rc = sqlite3_step(pIter->pIdxIter);
if( rc!=SQLITE_ROW ){
rc = sqlite3_reset(pIter->pIdxIter);
pIter->bCleanup = 1;
pIter->zIdx = 0;
}else{
pIter->zIdx = (const char*)sqlite3_column_text(pIter->pIdxIter, 0);
rc = SQLITE_OK;
}
}
}
if( rc!=SQLITE_OK ){
otaObjIterFinalize(pIter);
p->rc = rc;
}
pIter->iVisit++;
return rc;
}
/*
** Initialize the iterator structure passed as the second argument.
**
** If no error occurs, SQLITE_OK is returned and the iterator is left
** pointing to the first entry. Otherwise, an error code and message is
** left in the OTA handle passed as the first argument. A copy of the
** error code is returned.
*/
static int otaObjIterFirst(sqlite3ota *p, OtaObjIter *pIter){
int rc;
memset(pIter, 0, sizeof(OtaObjIter));
rc = prepareAndCollectError(p->dbOta, &pIter->pTblIter, &p->zErrmsg,
"SELECT substr(name, 6) FROM sqlite_master "
"WHERE type='table' AND name LIKE 'data_%'"
);
if( rc==SQLITE_OK ){
rc = prepareAndCollectError(p->dbDest, &pIter->pIdxIter, &p->zErrmsg,
"SELECT name FROM sqlite_master "
"WHERE type='index' AND tbl_name = ?"
);
}
pIter->bCleanup = 1;
p->rc = rc;
return otaObjIterNext(p, pIter);
}
/*
** Allocate a buffer and populate it with the double-quoted version of the
** string in the argument buffer, suitable for use as an SQL identifier.
** For example:
**
** [quick "brown" fox] -> ["quick ""brown"" fox"]
**
** Assuming the allocation is successful, a pointer to the new buffer is
** returned. It is the responsibility of the caller to free it using
** sqlite3_free() at some point in the future. Or, if the allocation fails,
** a NULL pointer is returned.
*/
static char *quoteSqlName(const char *zName){
static char *otaQuoteName(const char *zName){
int nName = strlen(zName);
char *zRet = sqlite3_malloc(nName * 2 + 2 + 1);
if( zRet ){
int i;
char *p = zRet;
*p++ = '"';
for(i=0; i<nName; i++){
if( zName[i]=='"' ) *p++ = '"';
*p++ = zName[i];
}
*p++ = '"';
*p++ = '\0';
}
return zRet;
}
static int tblIterPrepareAll(sqlite3ota *p){
OtaTblIter *pIter = &p->tbliter;
int rc = SQLITE_OK;
char *zCol = 0;
char *zBindings = 0;
char *zSql;
/*
** If they are not already populated, populate the pIter->azTblCol[],
** pIter->abTblPk[] and pIter->nTblCol variables according to the table
** that the iterator currently points to.
**
** Return SQLITE_OK if successful, or an SQLite error code otherwise. If
** an error does occur, an error code and error message are also left in
** the OTA handle.
*/
static int otaObjIterGetCols(sqlite3ota *p, OtaObjIter *pIter){
if( pIter->azTblCol==0 ){
sqlite3_stmt *pStmt;
char *zSql;
sqlite3_stmt *pPragma = 0;
int i;
int bSeenPk = 0; /* Set to true once PK column seen */
int nCol = 0;
int bSeenPk = 0;
int rc2; /* sqlite3_finalize() return value */
/* Allocate and populate the azCol[] array */
zSql = sqlite3_mprintf("PRAGMA main.table_info(%Q)", pIter->zTarget);
rc = prepareFreeAndCollectError(p->dbDest, zSql, &pPragma, &p->zErrmsg);
zSql = sqlite3_mprintf("PRAGMA table_info(%Q)", pIter->zTbl);
p->rc = prepareFreeAndCollectError(p->dbDest, &pStmt, &p->zErrmsg, zSql);
pIter->nCol = 0;
if( rc==SQLITE_OK ){
while( SQLITE_ROW==sqlite3_step(pPragma) ){
while( p->rc==SQLITE_OK && SQLITE_ROW==sqlite3_step(pStmt) ){
const char *zName = (const char*)sqlite3_column_text(pPragma, 1);
if( (pIter->nCol % 4)==0 ){
int nByte = sizeof(char*) * (pIter->nCol+4);
char **azNew = (char**)sqlite3_realloc(pIter->azCol, nByte);
if( (nCol % 8)==0 ){
int nByte = sizeof(char*) * (nCol+8);
char **azNew = (char**)sqlite3_realloc(pIter->azTblCol, nByte);
if( azNew==0 ){
rc = SQLITE_NOMEM;
break;
}
pIter->azCol = azNew;
u8 *abNew = (u8*)sqlite3_realloc(pIter->azTblCol, nCol+8);
}
pIter->azCol[pIter->nCol] = quoteSqlName(zName);
if( pIter->azCol[pIter->nCol]==0 ){
rc = SQLITE_NOMEM;
break;
}
pIter->nCol++;
if( sqlite3_column_int(pPragma, 5) ) bSeenPk = 1;
}
if( rc==SQLITE_OK ){
rc = sqlite3_finalize(pPragma);
}else{
sqlite3_finalize(pPragma);
}
}
if( azNew ) pIter->azTblCol = azNew;
/* If the table has no PRIMARY KEY, throw an exception. */
if( bSeenPk==0 ){
if( abNew ) pIter->abTblPk = abNew;
p->zErrmsg = sqlite3_mprintf("table %s has no PRIMARY KEY", pIter->zTarget);
rc = SQLITE_ERROR;
}
if( azNew==0 || abNew==0 ) p->rc = SQLITE_NOMEM;
}
/* Populate the zCol variable */
for(i=0; rc==SQLITE_OK && i<pIter->nCol; i++){
zCol = sqlite3_mprintf("%z%s%s", zCol, (i==0?"":", "), pIter->azCol[i]);
if( zCol==0 ){
rc = SQLITE_NOMEM;
}
}
if( p->rc==SQLITE_OK ){
const char *zName = (const char*)sqlite3_column_text(pStmt, 1);
pIter->abTblPk[nCol] = sqlite3_column_int(pStmt, 5);
if( pIter->abTblPk[nCol] ) bSeenPk = 1;
pIter->azTblCol[nCol] = otaQuoteName(zName);
if( pIter->azTblCol[nCol]==0 ) p->rc = SQLITE_NOMEM;
nCol++;
}
}
pIter->nTblCol = nCol;
rc2 = sqlite3_finalize(pStmt);
if( p->rc==SQLITE_OK ) p->rc = rc2;
/* Allocate and populate zBindings */
if( rc==SQLITE_OK ){
zBindings = (char*)sqlite3_malloc(pIter->nCol * 2);
if( p->rc==SQLITE_OK && bSeenPk==0 ){
p->zErrmsg = sqlite3_mprintf("table %s has no PRIMARY KEY", pIter->zTbl);
if( zBindings==0 ){
rc = SQLITE_NOMEM;
p->rc = SQLITE_ERROR;
}else{
int i;
for(i=0; i<pIter->nCol; i++){
zBindings[i*2] = '?';
zBindings[i*2+1] = ',';
}
}
zBindings[pIter->nCol*2-1] = '\0';
}
}
}
return p->rc;
/* Create OtaTblIter.pSelect */
if( rc==SQLITE_OK ){
zSql = sqlite3_mprintf("SELECT rowid, %s FROM %Q", zCol, pIter->zSource);
rc = prepareFreeAndCollectError(p->dbOta,zSql,&pIter->pSelect, &p->zErrmsg);
}
}
static char *otaObjIterGetCollist(
sqlite3ota *p,
/* Create OtaTblIter.pInsert */
if( rc==SQLITE_OK ){
zSql = sqlite3_mprintf("INSERT INTO %Q(%s) VALUES(%s)",
pIter->zTarget, zCol, zBindings
);
rc = prepareFreeAndCollectError(p->dbDest,zSql,&pIter->pInsert,&p->zErrmsg);
}
OtaObjIter *pIter,
int nCol,
int *aiCol
){
char *zList = 0;
if( p->rc==SQLITE_OK ){
const char *zSep = "";
int i;
for(i=0; i<nCol; i++){
int iCol = aiCol ? aiCol[i] : i;
zList = sqlite3_mprintf("%z%s%s", zList, zSep, pIter->azTblCol[iCol]);
zSep = ", ";
if( zList==0 ){
p->rc = SQLITE_NOMEM;
break;
}
}
sqlite3_free(zCol);
sqlite3_free(zBindings);
return rc;
}
}
return zList;
static void tblIterFreeAll(OtaTblIter *pIter){
int i;
}
sqlite3_finalize(pIter->pSelect);
sqlite3_finalize(pIter->pInsert);
for(i=0; i<pIter->nCol; i++) sqlite3_free(pIter->azCol[i]);
sqlite3_free(pIter->azCol);
pIter->azCol = 0;
pIter->pSelect = 0;
pIter->pInsert = 0;
pIter->nCol = 0;
}
static int tblIterNext(OtaTblIter *pIter){
int rc;
static char *otaObjIterGetBindlist(sqlite3ota *p, int nBind){
char *zRet = 0;
if( p->rc==SQLITE_OK ){
int nByte = nBind*2 + 1;
tblIterFreeAll(pIter);
assert( pIter->pTblIter );
rc = sqlite3_step(pIter->pTblIter);
if( rc==SQLITE_ROW ){
zRet = sqlite3_malloc(nByte);
if( zRet==0 ){
pIter->zSource = (const char*)sqlite3_column_text(pIter->pTblIter, 0);
pIter->zTarget = &pIter->zSource[5]; assert( 5==strlen("data_") );
pIter->iEntry++;
}else{
p->rc = SQLITE_NOMEM;
}else{
pIter->zSource = 0;
pIter->zTarget = 0;
int i;
}
for(i=0; i<nBind; i++){
if( rc==SQLITE_ROW || rc==SQLITE_DONE ) rc = SQLITE_OK;
return rc;
}
zRet[i*2] = '?';
zRet[i*2+1] = (i+1==nBind) ? '\0' : ',';
}
}
static int tblIterFirst(sqlite3 *db, OtaTblIter *pIter){
int rc; /* return code */
memset(pIter, 0, sizeof(OtaTblIter));
rc = sqlite3_prepare_v2(db,
"SELECT name FROM sqlite_master "
"WHERE type='table' AND name LIKE 'data_%'", -1, &pIter->pTblIter, 0
);
if( rc==SQLITE_OK ){
rc = tblIterNext(pIter);
}
return rc;
return zRet;
}
static void tblIterFinalize(OtaTblIter *pIter){
tblIterFreeAll(pIter);
sqlite3_finalize(pIter->pTblIter);
/*
** Ensure that the SQLite statement handles required to update the
** target database object currently indicated by the iterator passed
** as the second argument are available.
memset(pIter, 0, sizeof(OtaTblIter));
}
static void idxIterFreeAll(OtaIdxIter *pIter){
sqlite3_finalize(pIter->pWriter);
sqlite3_finalize(pIter->pSelect);
pIter->pWriter = 0;
pIter->pSelect = 0;
pIter->aiCol = 0;
pIter->nCol = 0;
}
*/
static int otaObjIterPrepareAll(
sqlite3ota *p,
OtaObjIter *pIter,
int nOffset /* Add "LIMIT -1 OFFSET $nOffset" to SELECT */
){
assert( pIter->bCleanup==0 );
if( pIter->pSelect==0 && otaObjIterGetCols(p, pIter)==SQLITE_OK ){
char *zCollist = 0; /* List of indexed columns */
char **pz = &p->zErrmsg;
const char *zIdx = pIter->zIdx;
char *zLimit = 0;
if( nOffset ){
static int idxIterPrepareAll(sqlite3ota *p){
int rc;
int i; /* Iterator variable */
char *zSql = 0;
char *zCols = 0; /* Columns list */
OtaIdxIter *pIter = &p->idxiter;
zLimit = sqlite3_mprintf(" LIMIT -1 OFFSET %d", nOffset);
/* Prepare the writer statement to write (insert) entries into the index. */
rc = sqlite3_index_writer(
if( !zLimit ) p->rc = SQLITE_NOMEM;
p->dbDest, 0, pIter->zIndex, &pIter->pWriter, &pIter->aiCol, &pIter->nCol
);
}
/* Prepare a SELECT statement to read values from the source table in
** the same order as they are stored in the current index. The statement
** is:
**
** SELECT rowid, <cols> FROM data_<tbl> ORDER BY <cols>
*/
for(i=0; rc==SQLITE_OK && i<pIter->nCol; i++){
const char *zQuoted = p->tbliter.azCol[ pIter->aiCol[i] ];
zCols = sqlite3_mprintf("%z%s%s", zCols, zCols?", ":"", zQuoted);
if( !zCols ){
rc = SQLITE_NOMEM;
}
}
if( rc==SQLITE_OK ){
if( zIdx ){
int *aiCol; /* Column map */
/* Create the index writer */
if( p->rc==SQLITE_OK ){
const char *zFmt = "SELECT rowid, %s FROM %Q ORDER BY %s";
zSql = sqlite3_mprintf(zFmt, zCols, p->tbliter.zSource, zCols);
if( zSql ){
p->rc = sqlite3_index_writer(
p->dbDest, 0, zIdx, &pIter->pInsert, &aiCol, &pIter->nCol
);
sqlite3_stmt **pp = &p->idxiter.pSelect;
rc = prepareFreeAndCollectError(p->dbOta, zSql, pp, &p->zErrmsg);
}else{
rc = SQLITE_NOMEM;
}
}
sqlite3_free(zCols);
}
/* Create the SELECT statement to read keys in sorted order */
zCollist = otaObjIterGetCollist(p, pIter, pIter->nCol, aiCol);
if( p->rc==SQLITE_OK ){
p->rc = prepareFreeAndCollectError(p->dbOta, &pIter->pSelect, pz,
sqlite3_mprintf(
return rc;
}
"SELECT %s FROM 'data_%q' ORDER BY %s%s",
zCollist, pIter->zTbl, zCollist, zLimit
)
static int idxIterNext(OtaIdxIter *pIter){
int rc;
idxIterFreeAll(pIter);
assert( pIter->pIdxIter );
rc = sqlite3_step(pIter->pIdxIter);
);
}
}else{
char *zBindings = otaObjIterGetBindlist(p, pIter->nTblCol);
zCollist = otaObjIterGetCollist(p, pIter, pIter->nTblCol, 0);
pIter->nCol = pIter->nTblCol;
if( rc==SQLITE_ROW ){
pIter->zIndex = (const char*)sqlite3_column_text(pIter->pIdxIter, 0);
pIter->iEntry++;
}else{
pIter->zIndex = 0;
rc = sqlite3_finalize(pIter->pIdxIter);
pIter->pIdxIter = 0;
}
if( rc==SQLITE_ROW ) rc = SQLITE_OK;
/* Create the SELECT statement to read keys from data_xxx */
if( p->rc==SQLITE_OK ){
return rc;
}
p->rc = prepareFreeAndCollectError(p->dbOta, &pIter->pSelect, pz,
static int idxIterFirst(sqlite3 *db, const char *zTable, OtaIdxIter *pIter){
int rc; /* return code */
memset(pIter, 0, sizeof(OtaIdxIter));
rc = sqlite3_prepare_v2(db,
"SELECT name FROM sqlite_master "
"WHERE type='index' AND tbl_name = ?", -1, &pIter->pIdxIter, 0
);
sqlite3_mprintf(
"SELECT %s FROM 'data_%q'%s",
zCollist, pIter->zTbl, zLimit)
);
if( rc==SQLITE_OK ){
rc = sqlite3_bind_text(pIter->pIdxIter, 1, zTable, -1, SQLITE_TRANSIENT);
}
if( rc==SQLITE_OK ){
rc = idxIterNext(pIter);
}
return rc;
}
}
/* Create the INSERT statement to write to the target PK b-tree */
if( p->rc==SQLITE_OK ){
p->rc = prepareFreeAndCollectError(p->dbDest, &pIter->pInsert, pz,
sqlite3_mprintf(
"INSERT INTO %Q(%s) VALUES(%s)", pIter->zTbl, zCollist, zBindings
)
);
}
sqlite3_free(zBindings);
}
sqlite3_free(zCollist);
static void idxIterFinalize(OtaIdxIter *pIter){
idxIterFreeAll(pIter);
sqlite3_finalize(pIter->pIdxIter);
sqlite3_free(zLimit);
memset(pIter, 0, sizeof(OtaIdxIter));
}
}
/*
** Call sqlite3_reset() on the SQL statement passed as the second argument.
** If it returns anything other than SQLITE_OK, store the error code and
** error message in the OTA handle.
*/
static void otaResetStatement(sqlite3ota *p, sqlite3_stmt *pStmt){
assert( p->rc==SQLITE_OK );
assert( p->zErrmsg==0 );
p->rc = sqlite3_reset(pStmt);
if( p->rc!=SQLITE_OK ){
return p->rc;
sqlite3 *db = sqlite3_db_handle(pStmt);
p->zErrmsg = sqlite3_mprintf("%s", sqlite3_errmsg(db));
}
}
}
/*
** Check that all SQL statements required to process the current
/*
** This function does the work for an sqlite3ota_step() call.
**
** The object-iterator (p->objiter) currently points to a valid object,
** and the input cursor (p->objiter.pSelect) currently points to a valid
** input row. Perform whatever processing is required and return.
** table and index have been prepared. If not, prepare them. If
** an error occurs, store the error code and message in the OTA
** handle before returning.
**
** If no error occurs, SQLITE_OK is returned. Otherwise, an error code
** and message is left in the OTA handle and a copy of the error code
** returned.
*/
static int otaPrepareAll(sqlite3ota *p){
static int otaStep(sqlite3ota *p){
assert( p->rc==SQLITE_OK );
assert( p->zErrmsg==0 );
assert( p->tbliter.zTarget );
OtaObjIter *pIter = &p->objiter;
int i;
for(i=0; i<pIter->nCol; i++){
if( p->tbliter.pSelect==0 ){
p->rc = tblIterPrepareAll(p);
sqlite3_value *pVal = sqlite3_column_value(pIter->pSelect, i);
sqlite3_bind_value(pIter->pInsert, i+1, pVal);
}
if( p->rc==SQLITE_OK && p->idxiter.zIndex && 0==p->idxiter.pSelect ){
p->rc = idxIterPrepareAll(p);
}
sqlite3_step(pIter->pInsert);
p->rc = resetAndCollectError(pIter->pInsert, &p->zErrmsg);
return p->rc;
}
/*
** Step the OTA object.
*/
int sqlite3ota_step(sqlite3ota *p){
if( p ){
OtaObjIter *pIter = &p->objiter;
while( p && p->rc==SQLITE_OK && p->tbliter.zTarget ){
while( p && p->rc==SQLITE_OK && pIter->zTbl ){
sqlite3_stmt *pSelect;
int i;
otaPrepareAll(p);
pSelect = (p->idxiter.zIndex ? p->idxiter.pSelect : p->tbliter.pSelect);
if( pIter->bCleanup ){
/* Advance to the next input row. */
if( p->rc==SQLITE_OK ){
int rc = sqlite3_step(pSelect);
if( rc!=SQLITE_ROW ){
otaResetStatement(p, pSelect);
/* this is where cleanup of the ota_xxx table will happen... */
/* Go to the next index. */
if( p->rc==SQLITE_OK ){
if( p->idxiter.zIndex ){
p->rc = idxIterNext(&p->idxiter);
}else{
}else{
p->rc = idxIterFirst(p->dbDest, p->tbliter.zTarget, &p->idxiter);
}
}
otaObjIterPrepareAll(p, pIter, 0);
/* If there is no next index, go to the next table. */
if( p->rc==SQLITE_OK && p->idxiter.zIndex==0 ){
p->rc = tblIterNext(&p->tbliter);
}
continue;
}
}
/* Update the target database PK table according to the row that
** tbliter.pSelect currently points to.
/* Advance to the next row to process. */
**
** todo: For now, we assume all rows are INSERT commands - this will
** change. */
if( p->rc==SQLITE_OK ){
sqlite3_stmt *pInsert;
if( p->rc==SQLITE_OK ){
int rc = sqlite3_step(pIter->pSelect);
int nCol;
if( p->idxiter.zIndex ){
if( rc==SQLITE_ROW ){
pInsert = p->idxiter.pWriter;
nCol = p->idxiter.nCol;
p->nStep++;
}else{
pInsert = p->tbliter.pInsert;
nCol = p->tbliter.nCol;
}
return otaStep(p);
}
p->rc = sqlite3_reset(pIter->pSelect);
for(i=0; i<nCol; i++){
sqlite3_value *pVal = sqlite3_column_value(pSelect, i+1);
sqlite3_bind_value(pInsert, i+1, pVal);
p->nStep = 0;
}
}
sqlite3_step(pInsert);
otaResetStatement(p, pInsert);
}
otaObjIterNext(p, pIter);
break;
}
if( p->rc==SQLITE_OK && p->tbliter.zTarget==0 ) p->rc = SQLITE_DONE;
}
return (p ? p->rc : SQLITE_NOMEM);
if( p->rc==SQLITE_OK && pIter->zTbl==0 ){
p->rc = SQLITE_DONE;
}
}
return p->rc;
}
static void otaOpenDatabase(sqlite3ota *p, sqlite3 **pDb, const char *zFile){
if( p->rc==SQLITE_OK ){
p->rc = sqlite3_open(zFile, pDb);
if( p->rc ){
const char *zErr = sqlite3_errmsg(*pDb);
p->zErrmsg = sqlite3_mprintf("sqlite3_open(): %s", zErr);
}
}
}
static void otaSaveTransactionState(sqlite3ota *p){
sqlite3_stmt *pSelect;
char *zInsert;
pSelect = (p->idxiter.zIndex ? p->idxiter.pSelect : p->tbliter.pSelect);
zInsert = sqlite3_mprintf(
"INSERT OR REPLACE INTO ota_state(rowid, tbl, idx, row, progress)"
"VALUES(1, %Q, %Q, %lld, NULL)",
p->tbliter.zTarget, p->idxiter.zIndex, sqlite3_column_int64(pSelect, 0)
"VALUES(1, %Q, %Q, %d, NULL)",
p->objiter.zTbl, p->objiter.zIdx, p->nStep
);
if( zInsert==0 ){
p->rc = SQLITE_NOMEM;
}else{
p->rc = sqlite3_exec(p->dbOta, zInsert, 0, 0, &p->zErrmsg);
if( p->rc==SQLITE_OK ){
p->rc = sqlite3_exec(p->dbOta, "COMMIT", 0, 0, &p->zErrmsg);
}
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