Examples with QueryExecutionStats org.apache.jackrabbit.oak.query.stats.QueryStatsData.QueryExecutionStats used on opensource projects

Example 1 with QueryExecutionStats

use of org.apache.jackrabbit.oak.query.stats.QueryStatsData.QueryExecutionStats in project jackrabbit-oak by apache.

the class QueryEngineImpl method parseQuery.

/**
 * Parse the query.
 *
 * @param statement the statement
 * @param language the language
 * @param context the context
 * @param mappings the mappings
 * @return the list of queries, where the first is the original, and all
 *         others are alternatives (for example, a "union" query)
 */
private static List<Query> parseQuery(String statement, String language, ExecutionContext context, Map<String, String> mappings) throws ParseException {
    boolean isInternal = SQL2Parser.isInternal(statement);
    if (isInternal) {
        LOG.trace("Parsing {} statement: {}", language, statement);
    } else {
        LOG.debug("Parsing {} statement: {}", language, statement);
    }
    NamePathMapper mapper = new NamePathMapperImpl(new LocalNameMapper(context.getRoot(), mappings));
    NodeTypeInfoProvider nodeTypes = context.getNodeTypeInfoProvider();
    QueryEngineSettings settings = context.getSettings();
    QueryExecutionStats stats = settings.getQueryStatsReporter().getQueryExecution(statement, language);
    SQL2Parser parser = new SQL2Parser(mapper, nodeTypes, settings, stats);
    if (language.endsWith(NO_LITERALS)) {
        language = language.substring(0, language.length() - NO_LITERALS.length());
        parser.setAllowNumberLiterals(false);
        parser.setAllowTextLiterals(false);
    }
    ArrayList<Query> queries = new ArrayList<Query>();
    Query q;
    if (SQL2.equals(language) || JQOM.equals(language)) {
        q = parser.parse(statement, false);
    } else if (SQL.equals(language)) {
        parser.setSupportSQL1(true);
        q = parser.parse(statement, false);
    } else if (XPATH.equals(language)) {
        XPathToSQL2Converter converter = new XPathToSQL2Converter();
        String sql2 = converter.convert(statement);
        LOG.debug("XPath > SQL2: {}", sql2);
        try {
            // OAK-874: No artificial XPath selector name in wildcards
            parser.setIncludeSelectorNameInWildcardColumns(false);
            q = parser.parse(sql2, false);
        } catch (ParseException e) {
            ParseException e2 = new ParseException(statement + " converted to SQL-2 " + e.getMessage(), 0);
            e2.initCause(e);
            throw e2;
        }
    } else {
        throw new ParseException("Unsupported language: " + language, 0);
    }
    if (q.isInternal()) {
        stats.setInternal(true);
    } else {
        stats.setThreadName(Thread.currentThread().getName());
    }
    queries.add(q);
    if (settings.isSql2Optimisation()) {
        if (q.isInternal()) {
            LOG.trace("Skipping optimisation as internal query.");
        } else {
            LOG.trace("Attempting optimisation");
            Query q2 = q.buildAlternativeQuery();
            if (q2 != q) {
                LOG.debug("Alternative query available: {}", q2);
                queries.add(q2);
            }
        }
    }
    // initialising all the queries.
    for (Query query : queries) {
        try {
            query.init();
        } catch (Exception e) {
            ParseException e2 = new ParseException(query.getStatement() + ": " + e.getMessage(), 0);
            e2.initCause(e);
            throw e2;
        }
    }
    return queries;
}