Examples with SqlParser org.apache.ignite.internal.sql.SqlParser used on opensource projects

Example 1 with SqlParser

use of org.apache.ignite.internal.sql.SqlParser in project ignite by apache.

the class QueryParser method parseNative.

/**
 * Tries to parse sql query text using native parser. Only first (leading) sql command of the multi-statement is
 * actually parsed.
 *
 * @param schemaName Schema name.
 * @param qry which sql text to parse.
 * @param remainingAllowed Whether multiple statements are allowed.
 * @return Command or {@code null} if cannot parse this query.
 */
@SuppressWarnings("IfMayBeConditional")
@Nullable
private QueryParserResult parseNative(String schemaName, SqlFieldsQuery qry, boolean remainingAllowed) {
    String sql = qry.getSql();
    // Heuristic check for fast return.
    if (!INTERNAL_CMD_RE.matcher(sql.trim()).find())
        return null;
    try {
        SqlParser parser = new SqlParser(schemaName, sql);
        SqlCommand nativeCmd = parser.nextCommand();
        assert nativeCmd != null : "Empty query. Parser met end of data";
        if (!(nativeCmd instanceof SqlCreateIndexCommand || nativeCmd instanceof SqlDropIndexCommand || nativeCmd instanceof SqlBeginTransactionCommand || nativeCmd instanceof SqlCommitTransactionCommand || nativeCmd instanceof SqlRollbackTransactionCommand || nativeCmd instanceof SqlBulkLoadCommand || nativeCmd instanceof SqlAlterTableCommand || nativeCmd instanceof SqlSetStreamingCommand || nativeCmd instanceof SqlCreateUserCommand || nativeCmd instanceof SqlAlterUserCommand || nativeCmd instanceof SqlDropUserCommand || nativeCmd instanceof SqlKillQueryCommand || nativeCmd instanceof SqlKillComputeTaskCommand || nativeCmd instanceof SqlKillServiceCommand || nativeCmd instanceof SqlKillTransactionCommand || nativeCmd instanceof SqlKillScanQueryCommand || nativeCmd instanceof SqlKillContinuousQueryCommand || nativeCmd instanceof SqlAnalyzeCommand || nativeCmd instanceof SqlRefreshStatitsicsCommand || nativeCmd instanceof SqlDropStatisticsCommand))
            return null;
        SqlFieldsQuery newQry = cloneFieldsQuery(qry).setSql(parser.lastCommandSql());
        QueryDescriptor newPlanKey = queryDescriptor(schemaName, newQry);
        SqlFieldsQuery remainingQry = null;
        if (!F.isEmpty(parser.remainingSql())) {
            checkRemainingAllowed(remainingAllowed);
            remainingQry = cloneFieldsQuery(qry).setSql(parser.remainingSql()).setArgs(qry.getArgs());
        }
        QueryParserResultCommand cmd = new QueryParserResultCommand(nativeCmd, null, false);
        return new QueryParserResult(newPlanKey, queryParameters(newQry), remainingQry, // Currently none of native statements supports parameters.
        Collections.emptyList(), null, null, cmd);
    } catch (SqlStrictParseException e) {
        throw new IgniteSQLException(e.getMessage(), e.errorCode(), e);
    } catch (Exception e) {
        // Cannot parse, return.
        if (log.isDebugEnabled())
            log.debug("Failed to parse SQL with native parser [qry=" + sql + ", err=" + e + ']');
        if (!IgniteSystemProperties.getBoolean(IgniteSystemProperties.IGNITE_SQL_PARSER_DISABLE_H2_FALLBACK))
            return null;
        int code = IgniteQueryErrorCode.PARSING;
        if (e instanceof SqlParseException)
            code = ((SqlParseException) e).code();
        throw new IgniteSQLException("Failed to parse DDL statement: " + sql + ": " + e.getMessage(), code, e);
    }
}

Example 2 with SqlParser

use of org.apache.ignite.internal.sql.SqlParser in project ignite by apache.

the class IgniteH2Indexing method tryQueryDistributedSqlFieldsNative.

/**
 * Try executing query using native facilities.
 *
 * @param schemaName Schema name.
 * @param sql Query.
 * @param cliCtx Client context, or {@code null} if not applicable.
 * @return Result or {@code null} if cannot parse/process this query.
 */
private List<FieldsQueryCursor<List<?>>> tryQueryDistributedSqlFieldsNative(String schemaName, String sql, @Nullable SqlClientContext cliCtx) {
    // Heuristic check for fast return.
    if (!INTERNAL_CMD_RE.matcher(sql.trim()).find())
        return null;
    // Parse.
    SqlCommand cmd;
    try {
        SqlParser parser = new SqlParser(schemaName, sql);
        cmd = parser.nextCommand();
        // No support for multiple commands for now.
        if (parser.nextCommand() != null)
            return null;
        // CREATE/ALTER/DROP USER
        if (!(cmd instanceof SqlCreateIndexCommand || cmd instanceof SqlDropIndexCommand || cmd instanceof SqlAlterTableCommand || cmd instanceof SqlBulkLoadCommand || cmd instanceof SqlSetStreamingCommand || cmd instanceof SqlCreateUserCommand || cmd instanceof SqlAlterUserCommand || cmd instanceof SqlDropUserCommand))
            return null;
    } catch (Exception e) {
        // Cannot parse, return.
        if (log.isDebugEnabled())
            log.debug("Failed to parse SQL with native parser [qry=" + sql + ", err=" + e + ']');
        if (!IgniteSystemProperties.getBoolean(IgniteSystemProperties.IGNITE_SQL_PARSER_DISABLE_H2_FALLBACK))
            return null;
        int code = IgniteQueryErrorCode.PARSING;
        if (e instanceof SqlParseException)
            code = ((SqlParseException) e).code();
        throw new IgniteSQLException("Failed to parse DDL statement: " + sql + ": " + e.getMessage(), code, e);
    }
    // Execute.
    if (cmd instanceof SqlBulkLoadCommand) {
        FieldsQueryCursor<List<?>> cursor = dmlProc.runNativeDmlStatement(sql, cmd);
        return Collections.singletonList(cursor);
    } else if (cmd instanceof SqlSetStreamingCommand) {
        if (cliCtx == null)
            throw new IgniteSQLException("SET STREAMING command can only be executed from JDBC or ODBC driver.");
        SqlSetStreamingCommand setCmd = (SqlSetStreamingCommand) cmd;
        boolean on = setCmd.isTurnOn();
        if (on)
            cliCtx.enableStreaming(setCmd.allowOverwrite(), setCmd.flushFrequency(), setCmd.perNodeBufferSize(), setCmd.perNodeParallelOperations());
        else
            cliCtx.disableStreaming();
        return Collections.singletonList(H2Utils.zeroCursor());
    } else {
        try {
            FieldsQueryCursor<List<?>> cursor = ddlProc.runDdlStatement(sql, cmd);
            return Collections.singletonList(cursor);
        } catch (IgniteCheckedException e) {
            throw new IgniteSQLException("Failed to execute DDL statement [stmt=" + sql + "]: " + e.getMessage(), e);
        }
    }
}