database/sqlite
1
0
Fork 0
mirror of https://github.com/sqlite/sqlite.git synced 2025-07-29 08:01:23 +03:00
Code Activity

A reasonably complete implementation of the "changeset" command-line tool

Browse Source 
and the ".sessions" command in the command-line shell.

FossilOrigin-Name: 7b12f1f9c012f33d376242920583807b014b3287
This commit is contained in:
drh
2014-08-18 20:01:31 +00:00
parent 3a67b0453e
commit 03168cacd5
4 changed files with 191 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files

108
ext/session/changeset.c
View File

@ -124,6 +124,58 @@ static void renderValue(sqlite3_value *pVal){
}
}
/*
** Number of conflicts seen
*/
static int nConflict = 0;
/*
** The conflict callback
*/
static int conflictCallback(
void *pCtx,
int eConflict,
sqlite3_changeset_iter *pIter
){
int op, bIndirect, nCol, i;
const char *zTab;
unsigned char *abPK;
const char *zType = "";
const char *zOp = "";
const char *zSep = " ";
nConflict++;
sqlite3changeset_op(pIter, &zTab, &nCol, &op, &bIndirect);
sqlite3changeset_pk(pIter, &abPK, 0);
switch( eConflict ){
case SQLITE_CHANGESET_DATA: zType = "DATA"; break;
case SQLITE_CHANGESET_NOTFOUND: zType = "NOTFOUND"; break;
case SQLITE_CHANGESET_CONFLICT: zType = "PRIMARY KEY"; break;
case SQLITE_CHANGESET_FOREIGN_KEY: zType = "FOREIGN KEY"; break;
case SQLITE_CHANGESET_CONSTRAINT: zType = "CONSTRAINT"; break;
}
switch( op ){
case SQLITE_UPDATE: zOp = "UPDATE of"; break;
case SQLITE_INSERT: zOp = "INSERT into"; break;
case SQLITE_DELETE: zOp = "DELETE from"; break;
}
printf("%s conflict on %s table %s with primary key", zType, zOp, zTab);
for(i=0; i<nCol; i++){
sqlite3_value *pVal;
if( abPK[i]==0 ) continue;
printf("%s", zSep);
if( op==SQLITE_INSERT ){
sqlite3changeset_new(pIter, i, &pVal);
}else{
sqlite3changeset_old(pIter, i, &pVal);
}
renderValue(pVal);
zSep = ",";
}
printf("\n");
return SQLITE_CHANGESET_OMIT;
}
int main(int argc, char **argv){
int sz, rc;
void *pBuf = 0;
@ -134,7 +186,32 @@ int main(int argc, char **argv){
** Apply the changeset in FILENAME to the database file DB
*/
if( strcmp(argv[2],"apply")==0 ){
fprintf(stderr, "not yet implemented\n");
sqlite3 *db;
if( argc!=4 ) usage(argv[0]);
rc = sqlite3_open(argv[3], &db);
if( rc!=SQLITE_OK ){
fprintf(stderr, "unable to open database file \"%s\": %s\n",
argv[3], sqlite3_errmsg(db));
sqlite3_close(db);
exit(1);
}
sqlite3_exec(db, "BEGIN", 0, 0, 0);
nConflict = 0;
rc = sqlite3changeset_apply(db, sz, pBuf, 0, conflictCallback, 0);
if( rc ){
fprintf(stderr, "sqlite3changeset_apply() returned %d\n", rc);
}
if( nConflict ){
fprintf(stderr, "%d conflicts - no changes applied\n", nConflict);
sqlite3_exec(db, "ROLLBACK", 0, 0, 0);
}else if( rc ){
fprintf(stderr, "sqlite3changeset_apply() returns %d "
"- no changes applied\n", rc);
sqlite3_exec(db, "ROLLBACK", 0, 0, 0);
}else{
sqlite3_exec(db, "COMMIT", 0, 0, 0);
}
sqlite3_close(db);
}else
/* changeset FILENAME concat FILE2 OUT
@ -142,7 +219,27 @@ int main(int argc, char **argv){
** and write the result into OUT.
*/
if( strcmp(argv[2],"concat")==0 ){
fprintf(stderr, "not yet implemented\n");
int szB;
void *pB;
int szOut;
void *pOutBuf;
FILE *out;
const char *zOut = argv[4];
if( argc!=5 ) usage(argv[0]);
out = fopen(zOut, "wb");
if( out==0 ){
fprintf(stderr, "cannot open \"%s\" for writing\n", zOut);
exit(1);
}
readFile(argv[3], &szB, &pB);
sqlite3changeset_concat(sz, pBuf, szB, pB, &szOut, &pOutBuf);
if( fwrite(pOutBuf, szOut, 1, out)!=1 ){
fprintf(stderr, "unable to write all %d bytes of output to \"%s\"\n",
szOut, zOut);
}
fclose(out);
sqlite3_free(pOutBuf);
sqlite3_free(pB);
}else
/* changeset FILENAME dump
@ -196,16 +293,17 @@ int main(int argc, char **argv){
FILE *out;
int szOut = 0;
void *pOutBuf = 0;
const char *zOut = argv[3];
if( argc!=4 ) usage(argv[0]);
out = fopen(argv[3], "wb");
out = fopen(zOut, "wb");
if( out==0 ){
fprintf(stderr, "cannot open \"%s\" for writing\n", argv[3]);
fprintf(stderr, "cannot open \"%s\" for writing\n", zOut);
exit(1);
}
sqlite3changeset_invert(sz, pBuf, &szOut, &pOutBuf);
if( fwrite(pOutBuf, szOut, 1, out)!=1 ){
fprintf(stderr, "unable to write all %d bytes of output to \"%s\"\n",
szOut, argv[3]);
szOut, zOut);
}
fclose(out);
sqlite3_free(pOutBuf);