146     string zSql = getCreateSqlString(metricId, event);  in createTableIfNeeded()  local
147     sqlite3_exec(db, zSql.c_str(), nullptr, nullptr, &error);  in createTableIfNeeded()
163     string zSql = StringPrintf("PRAGMA table_info(metric_%s);", reformatMetricId(metricId).c_str());  in isEventCompatible()  local
168     if (!query(key, zSql, rows, columnTypes, columnNames, err)) {  in isEventCompatible()
197     string zSql = StringPrintf("DROP TABLE metric_%s", reformatMetricId(metricId).c_str());  in deleteTable()  local
199     sqlite3_exec(db, zSql.c_str(), nullptr, nullptr, &error);  in deleteTable()
314 bool query(const ConfigKey& key, const string& zSql, vector<vector<string>>& rows,  in query()  argument
324     if (sqlite3_prepare_v2(db, zSql.c_str(), -1, &stmt, nullptr) != SQLITE_OK) {  in query()
365     string zSql = StringPrintf("DELETE FROM %s%s WHERE %s <= %lld", TABLE_NAME_PREFIX.c_str(),  in flushTtl()  local
370     sqlite3_exec(db, zSql.c_str(), nullptr, nullptr, &error);  in flushTtl()
385     string zSql = "PRAGMA integrity_check";  in verifyIntegrityAndDeleteIfNecessary()  local
388     sqlite3_exec(db, zSql.c_str(), integrityCheckCallback, nullptr, &error);  in verifyIntegrityAndDeleteIfNecessary()