/** * Creates query plans. * * @param comp compiled flag */ private void plan(final boolean comp) { if (comp != options.get(MainOptions.COMPPLAN)) return; // show dot plan try { if (options.get(MainOptions.DOTPLAN)) { final String path = options.get(MainOptions.QUERYPATH); final String dot = path.isEmpty() ? "plan.dot" : new IOFile(path).name().replaceAll("\\..*?$", ".dot"); try (final BufferOutput bo = new BufferOutput(dot)) { try (final DOTSerializer d = new DOTSerializer(bo, options.get(MainOptions.DOTCOMPACT))) { d.serialize(qp.plan()); } } } // show XML plan if (options.get(MainOptions.XMLPLAN)) { info(NL + QUERY_PLAN + COL); info(qp.plan().serialize().toString()); } } catch (final Exception ex) { Util.stack(ex); } }
/** * Returns the serialization parameters. * * @param ctx context * @return serialization parameters */ public String parameters(final Context ctx) { try { qp(args[0], ctx); parse(null); return qp.qc.serParams().toString(); } catch (final QueryException ex) { error(Util.message(ex)); } finally { qp = null; } return SerializerMode.DEFAULT.get().toString(); }
/** * Checks if the query possibly performs updates. * * @param ctx database context * @param query query string * @return result of check */ final boolean updates(final Context ctx, final String query) { try { final Performance p = new Performance(); qp(query, ctx); parse(p); return qp.updating; } catch (final QueryException ex) { Util.debug(ex); exception = ex; qp.close(); return false; } }
/** * Evaluates the specified query. * * @param query query * @return success flag */ final boolean query(final String query) { final Performance p = new Performance(); String error; if (exception != null) { error = Util.message(exception); } else { try { long hits = 0; final boolean run = options.get(MainOptions.RUNQUERY); final boolean serial = options.get(MainOptions.SERIALIZE); final int runs = Math.max(1, options.get(MainOptions.RUNS)); for (int r = 0; r < runs; ++r) { // reuse existing processor instance if (r != 0) qp = null; qp(query, context); parse(p); if (r == 0) plan(false); qp.compile(); info.compiling += p.time(); if (r == 0) plan(true); if (!run) continue; final PrintOutput po = r == 0 && serial ? out : new NullOutput(); try (final Serializer ser = qp.getSerializer(po)) { if (maxResults >= 0) { result = qp.cache(maxResults); info.evaluating += p.time(); result.serialize(ser); hits = result.size(); } else { hits = 0; final Iter ir = qp.iter(); info.evaluating += p.time(); for (Item it; (it = ir.next()) != null; ) { ser.serialize(it); ++hits; checkStop(); } } } qp.close(); info.serializing += p.time(); } // dump some query info // out.flush(); // remove string list if global locking is used and if query is updating if (soptions.get(StaticOptions.GLOBALLOCK) && qp.updating) { info.readLocked = null; info.writeLocked = null; } return info(info.toString(qp, out.size(), hits, options.get(MainOptions.QUERYINFO))); } catch (final QueryException | IOException ex) { exception = ex; error = Util.message(ex); } catch (final ProcException ex) { error = INTERRUPTED; } catch (final StackOverflowError ex) { Util.debug(ex); error = BASX_STACKOVERFLOW.desc; } catch (final RuntimeException ex) { extError(""); Util.debug(info()); throw ex; } finally { // close processor after exceptions if (qp != null) qp.close(); } } return extError(error); }