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[db] Use prepared statements for playlists (add/update)

This commit is contained in:
ejurgensen 2019-12-27 15:04:43 -08:00
parent 942628f914
commit 08e89ffd4f
2 changed files with 142 additions and 124 deletions
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260
src/db.c
View File

@ -62,8 +62,9 @@
#define DB_TYPE_INT64 2
#define DB_TYPE_STRING 3
// Flags that column value is set automatically by the db, e.g. by a trigger
#define DB_FLAG_AUTO (1 << 0)
// Flags that the field will not be bound to prepared statements, which is relevant if the field has no
// matching column, or if the the column value is set automatically by the db, e.g. by a trigger
#define DB_FLAG_NO_BIND (1 << 0)
// Flags that we will only update column value if we have non-zero value (to avoid zeroing e.g. rating)
#define DB_FLAG_NO_ZERO (1 << 1)
@ -110,6 +111,9 @@ struct db_statements
sqlite3_stmt *files_insert;
sqlite3_stmt *files_update;
sqlite3_stmt *files_ping;
sqlite3_stmt *playlists_insert;
sqlite3_stmt *playlists_update;
};
struct col_type_map {
@ -150,7 +154,7 @@ struct browse_clause {
*/
static const struct col_type_map mfi_cols_map[] =
{
{ "id", mfi_offsetof(id), DB_TYPE_INT, DB_FIXUP_STANDARD, DB_FLAG_AUTO },
{ "id", mfi_offsetof(id), DB_TYPE_INT, DB_FIXUP_STANDARD, DB_FLAG_NO_BIND },
{ "path", mfi_offsetof(path), DB_TYPE_STRING, DB_FIXUP_NO_SANITIZE },
{ "virtual_path", mfi_offsetof(virtual_path), DB_TYPE_STRING },
{ "fname", mfi_offsetof(fname), DB_TYPE_STRING, DB_FIXUP_NO_SANITIZE },
@ -221,7 +225,7 @@ static const struct col_type_map mfi_cols_map[] =
*/
static const struct col_type_map pli_cols_map[] =
{
{ "id", pli_offsetof(id), DB_TYPE_INT, DB_FIXUP_STANDARD, DB_FLAG_AUTO },
{ "id", pli_offsetof(id), DB_TYPE_INT, DB_FIXUP_STANDARD, DB_FLAG_NO_BIND },
{ "title", pli_offsetof(title), DB_TYPE_STRING, DB_FIXUP_TITLE },
{ "type", pli_offsetof(type), DB_TYPE_INT },
{ "query", pli_offsetof(query), DB_TYPE_STRING, DB_FIXUP_NO_SANITIZE },
@ -235,11 +239,11 @@ static const struct col_type_map pli_cols_map[] =
{ "directory_id", pli_offsetof(directory_id), DB_TYPE_INT },
{ "query_order", pli_offsetof(query_order), DB_TYPE_STRING, DB_FIXUP_NO_SANITIZE },
{ "query_limit", pli_offsetof(query_limit), DB_TYPE_INT },
{ "media_kind", pli_offsetof(media_kind), DB_TYPE_INT },
{ "media_kind", pli_offsetof(media_kind), DB_TYPE_INT, DB_FIXUP_MEDIA_KIND },
// Not in the database, but returned via the query's COUNT()/SUM()
{ "items", pli_offsetof(items), DB_TYPE_INT },
{ "streams", pli_offsetof(streams), DB_TYPE_INT },
{ "items", pli_offsetof(items), DB_TYPE_INT, DB_FIXUP_STANDARD, DB_FLAG_NO_BIND },
{ "streams", pli_offsetof(streams), DB_TYPE_INT, DB_FIXUP_STANDARD, DB_FLAG_NO_BIND },
};
/* This list must be kept in sync with
@ -248,7 +252,7 @@ static const struct col_type_map pli_cols_map[] =
*/
static const struct col_type_map qi_cols_map[] =
{
{ "id", qi_offsetof(id), DB_TYPE_INT, DB_FIXUP_STANDARD, DB_FLAG_AUTO },
{ "id", qi_offsetof(id), DB_TYPE_INT, DB_FIXUP_STANDARD, DB_FLAG_NO_BIND },
{ "file_id", qi_offsetof(id), DB_TYPE_INT },
{ "pos", qi_offsetof(pos), DB_TYPE_INT },
{ "shuffle_pos", qi_offsetof(shuffle_pos), DB_TYPE_INT },
@ -277,7 +281,7 @@ static const struct col_type_map qi_cols_map[] =
{ "type", qi_offsetof(type), DB_TYPE_STRING, DB_FIXUP_CODECTYPE },
{ "bitrate", qi_offsetof(bitrate), DB_TYPE_INT },
{ "samplerate", qi_offsetof(samplerate), DB_TYPE_INT },
{ "chanenls", qi_offsetof(channels), DB_TYPE_INT },
{ "channels", qi_offsetof(channels), DB_TYPE_INT },
};
/* This list must be kept in sync with
@ -400,7 +404,7 @@ static const ssize_t dbgri_cols_map[] =
*/
static const struct col_type_map wi_cols_map[] =
{
{ "wd", wi_offsetof(wd), DB_TYPE_INT, DB_FLAG_AUTO },
{ "wd", wi_offsetof(wd), DB_TYPE_INT, DB_FLAG_NO_BIND },
{ "cookie", wi_offsetof(cookie), DB_TYPE_INT },
{ "path", wi_offsetof(path), DB_TYPE_STRING },
};
@ -950,6 +954,8 @@ fixup_defaults(char **tag, enum fixup_type fixup, struct fixup_ctx *ctx)
ctx->mfi->media_kind = MEDIA_KIND_TVSHOW;
else if (ctx->mfi && !ctx->mfi->media_kind)
ctx->mfi->media_kind = MEDIA_KIND_MUSIC;
else if (ctx->pli && !ctx->pli->media_kind)
ctx->pli->media_kind = MEDIA_KIND_MUSIC;
else if (ctx->queue_item && !ctx->queue_item->media_kind)
ctx->queue_item->media_kind = MEDIA_KIND_MUSIC;
@ -1095,22 +1101,22 @@ fixup_tags_queue_item(struct db_queue_item *queue_item)
}
static int
bind_mfi(sqlite3_stmt *stmt, struct media_file_info *mfi)
bind_generic(sqlite3_stmt *stmt, void *data, const struct col_type_map *map, size_t map_size, int id)
{
char **strptr;
char *ptr;
int i;
int n;
for (i = 0, n = 1; i < ARRAY_SIZE(mfi_cols_map); i++)
for (i = 0, n = 1; i < map_size; i++)
{
if (mfi_cols_map[i].flag & DB_FLAG_AUTO)
if (map[i].flag & DB_FLAG_NO_BIND)
continue;
ptr = (char *)mfi + mfi_cols_map[i].offset;
strptr = (char **)((char *)mfi + mfi_cols_map[i].offset);
ptr = data + map[i].offset;
strptr = (char **)(data + map[i].offset);
switch (mfi_cols_map[i].type)
switch (map[i].type)
{
case DB_TYPE_INT:
sqlite3_bind_int64(stmt, n, *((uint32_t *)ptr)); // Use _int64 because _int is for signed int32
@ -1125,7 +1131,7 @@ bind_mfi(sqlite3_stmt *stmt, struct media_file_info *mfi)
break;
default:
DPRINTF(E_LOG, L_DB, "BUG: Unknown type %d in mfi column map\n", mfi_cols_map[i].type);
DPRINTF(E_LOG, L_DB, "BUG: Unknown type %d in column map\n", map[i].type);
return -1;
}
@ -1133,12 +1139,23 @@ bind_mfi(sqlite3_stmt *stmt, struct media_file_info *mfi)
}
// This binds the final "WHERE id = ?" if it is an update
if (mfi->id)
sqlite3_bind_int(stmt, n, mfi->id);
if (id)
sqlite3_bind_int(stmt, n, id);
return 0;
}
static int
bind_mfi(sqlite3_stmt *stmt, struct media_file_info *mfi)
{
return bind_generic(stmt, mfi, mfi_cols_map, ARRAY_SIZE(mfi_cols_map), mfi->id);
}
static int
bind_pli(sqlite3_stmt *stmt, struct playlist_info *pli)
{
return bind_generic(stmt, pli, pli_cols_map, ARRAY_SIZE(pli_cols_map), pli->id);
}
/* Unlock notification support */
static void
@ -3464,73 +3481,58 @@ db_pl_fetch_bytitlepath(const char *title, const char *path)
int
db_pl_add(struct playlist_info *pli, int *id)
{
#define QDUP_TMPL "SELECT COUNT(*) FROM playlists p WHERE p.title = TRIM(%Q) AND p.path = '%q';"
#define QADD_TMPL "INSERT INTO playlists (title, type, query, db_timestamp, disabled, path, idx, special_id," \
" parent_id, virtual_path, directory_id, query_order, query_limit)" \
" VALUES (TRIM(%Q), %d, '%q', %" PRIi64 ", %d, '%q', %d, %d, %d, '%q', %d, %Q, %d);"
char *query;
char *errmsg;
int ret;
// If the backend sets 1 it must be preserved, because the backend is still
// scanning and is going to update it later (see filescanner_playlist.c)
if (pli->db_timestamp != 1)
pli->db_timestamp = (uint64_t)time(NULL);
fixup_tags_pli(pli);
/* Check duplicates */
query = sqlite3_mprintf(QDUP_TMPL, pli->title, STR(pli->path));
if (!query)
{
DPRINTF(E_LOG, L_DB, "Out of memory for query string\n");
ret = bind_pli(db_statements.playlists_insert, pli);
if (ret < 0)
return -1;
ret = db_statement_run(db_statements.playlists_insert);
if (ret < 0)
return -1;
if (id)
{
ret = db_pl_id_bypath(pli->path);
if (ret < 0)
return -1;
*id = ret;
}
ret = db_get_one_int(query);
sqlite3_free(query);
if (ret > 0)
{
DPRINTF(E_WARN, L_DB, "Duplicate playlist with title '%s' path '%s'\n", pli->title, pli->path);
return -1;
}
/* Add */
query = sqlite3_mprintf(QADD_TMPL,
pli->title, pli->type, pli->query, (int64_t)time(NULL), pli->disabled, STR(pli->path),
pli->index, pli->special_id, pli->parent_id, pli->virtual_path, pli->directory_id,
pli->query_order, pli->query_limit);
if (!query)
{
DPRINTF(E_LOG, L_DB, "Out of memory for query string\n");
return -1;
}
DPRINTF(E_DBG, L_DB, "Running query '%s'\n", query);
ret = db_exec(query, &errmsg);
if (ret != SQLITE_OK)
{
DPRINTF(E_LOG, L_DB, "Query error: %s\n", errmsg);
sqlite3_free(errmsg);
sqlite3_free(query);
return -1;
}
sqlite3_free(query);
*id = (int)sqlite3_last_insert_rowid(hdl);
if (*id == 0)
{
DPRINTF(E_LOG, L_DB, "Successful insert but no last_insert_rowid!\n");
return -1;
}
DPRINTF(E_DBG, L_DB, "Added playlist %s (path %s) with id %d\n", pli->title, pli->path, *id);
DPRINTF(E_DBG, L_DB, "Added playlist %s (path %s)\n", pli->title, pli->path);
return 0;
}
#undef QDUP_TMPL
#undef QADD_TMPL
int
db_pl_update(struct playlist_info *pli)
{
int ret;
// If the backend sets 1 it must be preserved, because the backend is still
// scanning and is going to update it later (see filescanner_playlist.c)
if (pli->db_timestamp != 1)
pli->db_timestamp = (uint64_t)time(NULL);
fixup_tags_pli(pli);
ret = bind_pli(db_statements.playlists_update, pli);
if (ret < 0)
return -1;
ret = db_statement_run(db_statements.playlists_update);
if (ret < 0)
return -1;
return 0;
}
int
@ -3557,29 +3559,6 @@ db_pl_add_item_byid(int plid, int fileid)
#undef Q_TMPL
}
int
db_pl_update(struct playlist_info *pli)
{
#define Q_TMPL "UPDATE playlists SET title = TRIM(%Q), type = %d, query = '%q', db_timestamp = %" PRIi64 ", disabled = %d," \
" path = '%q', idx = %d, special_id = %d, parent_id = %d, virtual_path = '%q', directory_id = %d," \
" query_order = %Q, query_limit = %d" \
" WHERE id = %d;"
char *query;
int ret;
fixup_tags_pli(pli);
query = sqlite3_mprintf(Q_TMPL,
pli->title, pli->type, pli->query, (int64_t)time(NULL), pli->disabled, STR(pli->path),
pli->index, pli->special_id, pli->parent_id, pli->virtual_path, pli->directory_id,
pli->query_order, pli->query_limit, pli->id);
ret = db_query_run(query, 1, 0);
return ret;
#undef Q_TMPL
}
void
db_pl_clear_items(int id)
{
@ -6787,24 +6766,24 @@ db_open(void)
return 0;
}
static int
db_statements_prepare(void)
static sqlite3_stmt *
db_statements_prepare_insert(const struct col_type_map *map, size_t map_size, const char *table)
{
char *query;
char keystr[2048];
char valstr[1024];
sqlite3_stmt *stmt;
int ret;
int i;
// Prepare "INSERT INTO files" statement
memset(keystr, 0, sizeof(keystr));
memset(valstr, 0, sizeof(valstr));
for (i = 0; i < ARRAY_SIZE(mfi_cols_map); i++)
for (i = 0; i < map_size; i++)
{
if (mfi_cols_map[i].flag & DB_FLAG_AUTO)
if (map[i].flag & DB_FLAG_NO_BIND)
continue;
CHECK_ERR(L_DB, safe_snprintf_cat(keystr, sizeof(keystr), "%s, ", mfi_cols_map[i].name));
CHECK_ERR(L_DB, safe_snprintf_cat(keystr, sizeof(keystr), "%s, ", map[i].name));
CHECK_ERR(L_DB, safe_snprintf_cat(valstr, sizeof(valstr), "?, "));
}
@ -6812,58 +6791,97 @@ db_statements_prepare(void)
*(strrchr(keystr, ',')) = '\0';
*(strrchr(valstr, ',')) = '\0';
CHECK_NULL(L_DB, query = db_mprintf("INSERT INTO files (%s) VALUES (%s);", keystr, valstr));
CHECK_NULL(L_DB, query = db_mprintf("INSERT INTO %s (%s) VALUES (%s);", table, keystr, valstr));
ret = db_blocking_prepare_v2(query, -1, &db_statements.files_insert, NULL);
ret = db_blocking_prepare_v2(query, -1, &stmt, NULL);
if (ret != SQLITE_OK)
{
DPRINTF(E_FATAL, L_DB, "Could not prepare statement '%s': %s\n", query, sqlite3_errmsg(hdl));
free(query);
return -1;
return NULL;
}
free(query);
// Prepare "UPDATE files" statement
return stmt;
}
static sqlite3_stmt *
db_statements_prepare_update(const struct col_type_map *map, size_t map_size, const char *table)
{
char *query;
char keystr[2048];
sqlite3_stmt *stmt;
int ret;
int i;
memset(keystr, 0, sizeof(keystr));
for (i = 0; i < ARRAY_SIZE(mfi_cols_map); i++)
for (i = 0; i < map_size; i++)
{
if (mfi_cols_map[i].flag & DB_FLAG_AUTO)
if (map[i].flag & DB_FLAG_NO_BIND)
continue;
if (mfi_cols_map[i].flag & DB_FLAG_NO_ZERO)
CHECK_ERR(L_DB, safe_snprintf_cat(keystr, sizeof(keystr), "%s = daap_no_zero(?, %s), ", mfi_cols_map[i].name, mfi_cols_map[i].name));
if (map[i].flag & DB_FLAG_NO_ZERO)
CHECK_ERR(L_DB, safe_snprintf_cat(keystr, sizeof(keystr), "%s = daap_no_zero(?, %s), ", map[i].name, map[i].name));
else
CHECK_ERR(L_DB, safe_snprintf_cat(keystr, sizeof(keystr), "%s = ?, ", mfi_cols_map[i].name));
CHECK_ERR(L_DB, safe_snprintf_cat(keystr, sizeof(keystr), "%s = ?, ", map[i].name));
}
// Terminate at the ending ", "
*(strrchr(keystr, ',')) = '\0';
CHECK_NULL(L_DB, query = db_mprintf("UPDATE files SET %s WHERE %s = ?;", keystr, mfi_cols_map[0].name));
CHECK_NULL(L_DB, query = db_mprintf("UPDATE %s SET %s WHERE %s = ?;", table, keystr, map[0].name));
ret = db_blocking_prepare_v2(query, -1, &db_statements.files_update, NULL);
ret = db_blocking_prepare_v2(query, -1, &stmt, NULL);
if (ret != SQLITE_OK)
{
DPRINTF(E_FATAL, L_DB, "Could not prepare statement '%s': %s\n", query, sqlite3_errmsg(hdl));
free(query);
return -1;
return NULL;
}
free(query);
// Prepare "UPDATE files SET db_timestamp" statement
CHECK_NULL(L_DB, query = db_mprintf("UPDATE files SET db_timestamp = ?, disabled = 0 WHERE path = ? AND db_timestamp >= ?;"));
return stmt;
}
ret = db_blocking_prepare_v2(query, -1, &db_statements.files_ping, NULL);
static sqlite3_stmt *
db_statements_prepare_ping(const char *table)
{
char *query;
sqlite3_stmt *stmt;
int ret;
CHECK_NULL(L_DB, query = db_mprintf("UPDATE %s SET db_timestamp = ?, disabled = 0 WHERE path = ? AND db_timestamp >= ?;", table));
ret = db_blocking_prepare_v2(query, -1, &stmt, NULL);
if (ret != SQLITE_OK)
{
DPRINTF(E_FATAL, L_DB, "Could not prepare statement '%s': %s\n", query, sqlite3_errmsg(hdl));
free(query);
return -1;
return NULL;
}
free(query);
return stmt;
}
static int
db_statements_prepare(void)
{
db_statements.files_insert = db_statements_prepare_insert(mfi_cols_map, ARRAY_SIZE(mfi_cols_map), "files");
db_statements.files_update = db_statements_prepare_update(mfi_cols_map, ARRAY_SIZE(mfi_cols_map), "files");
db_statements.files_ping = db_statements_prepare_ping("files");
db_statements.playlists_insert = db_statements_prepare_insert(pli_cols_map, ARRAY_SIZE(pli_cols_map), "playlists");
db_statements.playlists_update = db_statements_prepare_update(pli_cols_map, ARRAY_SIZE(pli_cols_map), "playlists");
if ( !db_statements.files_insert || !db_statements.files_update || !db_statements.files_ping
|| !db_statements.playlists_insert || !db_statements.playlists_update
)
return -1;
return 0;
}

6
src/db.h
View File

@ -672,6 +672,9 @@ db_pl_fetch_bytitlepath(const char *title, const char *path);
int
db_pl_add(struct playlist_info *pli, int *id);
int
db_pl_update(struct playlist_info *pli);
int
db_pl_add_item_bypath(int plid, const char *path);
@ -681,9 +684,6 @@ db_pl_add_item_byid(int plid, int fileid);
void
db_pl_clear_items(int id);
int
db_pl_update(struct playlist_info *pli);
void
db_pl_delete(int id);