Examples with JSONException org.json_voltpatches.JSONException used on opensource projects

Example 41 with JSONException

use of org.json_voltpatches.JSONException in project voltdb by VoltDB.

the class PlanNodeList method toJSONString.

@Override
public String toJSONString() {
    try {
        JSONStringer stringer = new JSONStringer();
        stringer.object();
        m_tree.toJSONString(stringer);
        if (m_executeLists.size() == 1) {
            stringer.key(EXECUTE_LIST_MEMBER_NAME).array();
            List<AbstractPlanNode> list = m_executeLists.get(0);
            for (AbstractPlanNode node : list) {
                stringer.value(node.getPlanNodeId().intValue());
            }
            //end execution list
            stringer.endArray();
        } else {
            stringer.key(EXECUTE_LISTS_MEMBER_NAME).array();
            for (List<AbstractPlanNode> list : m_executeLists) {
                stringer.object().key(EXECUTE_LIST_MEMBER_NAME).array();
                for (AbstractPlanNode node : list) {
                    stringer.value(node.getPlanNodeId().intValue());
                }
                //end execution list
                stringer.endArray().endObject();
            }
            //end execution list
            stringer.endArray();
        }
        //end PlanNodeList
        stringer.endObject();
        return stringer.toString();
    } catch (JSONException e) {
        // Consider this the coward's way out.
        return "This JSON error message is a lie";
    }
}

Example 42 with JSONException

use of org.json_voltpatches.JSONException in project voltdb by VoltDB.

the class PlanNodeTree method toJSONString.

@Override
public String toJSONString() {
    JSONStringer stringer = new JSONStringer();
    try {
        stringer.object();
        toJSONString(stringer);
        stringer.endObject();
    } catch (JSONException e) {
        e.printStackTrace();
        throw new RuntimeException(e);
    }
    return stringer.toString();
}

Example 43 with JSONException

use of org.json_voltpatches.JSONException in project voltdb by VoltDB.

the class PlanNodeTree method loadPlanNodesFromJSONArrays.

/**
     *  Load plan nodes from the "PLAN_NODE" array. All the nodes are from
     *  a substatement with the id = stmtId
     * @param stmtId
     * @param jArray - PLAN_NODES
     * @param db
     * @throws JSONException
     */
private void loadPlanNodesFromJSONArrays(int stmtId, JSONArray jArray, Database db) {
    List<AbstractPlanNode> planNodes = new ArrayList<AbstractPlanNode>();
    int size = jArray.length();
    try {
        for (int i = 0; i < size; i++) {
            JSONObject jobj = jArray.getJSONObject(i);
            String nodeTypeStr = jobj.getString("PLAN_NODE_TYPE");
            PlanNodeType nodeType = PlanNodeType.get(nodeTypeStr);
            AbstractPlanNode apn = nodeType.getPlanNodeClass().newInstance();
            apn.loadFromJSONObject(jobj, db);
            planNodes.add(apn);
        }
        //link children and parents
        for (int i = 0; i < size; i++) {
            JSONObject jobj = jArray.getJSONObject(i);
            if (jobj.has("CHILDREN_IDS")) {
                AbstractPlanNode parent = planNodes.get(i);
                JSONArray children = jobj.getJSONArray("CHILDREN_IDS");
                for (int j = 0; j < children.length(); j++) {
                    AbstractPlanNode child = getNodeofId(children.getInt(j), planNodes);
                    parent.addAndLinkChild(child);
                }
            }
        }
        m_planNodesListMap.put(stmtId, planNodes);
    } catch (JSONException | InstantiationException | IllegalAccessException e) {
        System.err.println(e);
        e.printStackTrace();
    }
}

Example 44 with JSONException

use of org.json_voltpatches.JSONException in project voltdb by VoltDB.

the class IndexCountPlanNode method explainPlanForNode.

@Override
protected String explainPlanForNode(String indent) {
    assert (m_catalogIndex != null);
    int indexSize = CatalogUtil.getCatalogIndexSize(m_catalogIndex);
    int searchkeySize = m_searchkeyExpressions.size();
    int endkeySize = m_endkeyExpressions.size();
    int keySize = Math.max(searchkeySize, endkeySize);
    String scanType = "tree-counter";
    String cover = "covering";
    if (indexSize > keySize)
        cover = String.format("%d/%d cols", keySize, indexSize);
    String usageInfo = String.format("(%s %s)", scanType, cover);
    String[] asIndexed = new String[indexSize];
    // they beat an NPE.
    for (int ii = 0; ii < keySize; ++ii) {
        asIndexed[ii] = "(index key " + ii + ")";
    }
    String jsonExpr = m_catalogIndex.getExpressionsjson();
    // if this is a pure-column index...
    if (jsonExpr.isEmpty()) {
        // grab the short names of the indexed columns in use.
        for (ColumnRef cref : m_catalogIndex.getColumns()) {
            Column col = cref.getColumn();
            asIndexed[cref.getIndex()] = col.getName();
        }
    } else {
        try {
            List<AbstractExpression> indexExpressions = AbstractExpression.fromJSONArrayString(jsonExpr, m_tableScan);
            int ii = 0;
            for (AbstractExpression ae : indexExpressions) {
                asIndexed[ii++] = ae.explain(m_targetTableName);
            }
        } catch (JSONException e) {
        // If something unexpected went wrong,
        // just fall back on the positional key labels.
        }
    }
    // "(event_type = 1 AND event_start > x.start_time)"
    if (searchkeySize > 0) {
        String start = explainKeys(asIndexed, m_searchkeyExpressions, m_targetTableName, m_lookupType, m_compareNotDistinct);
        usageInfo += "\n" + indent + " count matches from " + start;
    }
    if (endkeySize > 0) {
        String end = explainKeys(asIndexed, m_endkeyExpressions, m_targetTableName, m_endType, m_compareNotDistinct);
        usageInfo += "\n" + indent + " count matches to " + end;
    }
    if (m_skip_null_predicate != null) {
        String predicate = m_skip_null_predicate.explain(m_targetTableName);
        usageInfo += "\n" + indent + " discounting rows where " + predicate;
    }
    // Describe the table name and either a user-provided name of the index or
    // its user-specified role ("primary key").
    String retval = "INDEX COUNT of \"" + m_targetTableName + "\"";
    String indexDescription = " using \"" + m_targetIndexName + "\"";
    // Replace ugly system-generated index name with a description of its user-specified role.
    if (m_targetIndexName.startsWith(HSQLInterface.AUTO_GEN_PRIMARY_KEY_PREFIX) || m_targetIndexName.startsWith(HSQLInterface.AUTO_GEN_NAMED_CONSTRAINT_IDX) || m_targetIndexName.equals(HSQLInterface.AUTO_GEN_MATVIEW_IDX)) {
        indexDescription = " using its primary key index";
    }
    // Bring all the pieces together describing the index, how it is scanned,
    // and whatever extra filter processing is done to the result.
    retval += indexDescription;
    retval += usageInfo;
    return retval;
}

Example 45 with JSONException

use of org.json_voltpatches.JSONException in project voltdb by VoltDB.

the class IndexScanPlanNode method explainPlanForNode.

@Override
protected String explainPlanForNode(String indent) {
    assert (m_catalogIndex != null);
    int keySize = m_searchkeyExpressions.size();
    // When there is no start key, count a range scan key for each ANDed end condition.
    if (keySize == 0 && m_endExpression != null) {
        keySize = ExpressionUtil.uncombineAny(m_endExpression).size();
    }
    String usageInfo;
    String predicatePrefix;
    if (keySize == 0) {
        // -- either for determinism or for an explicit ORDER BY requirement.
        if (m_purpose == FOR_DETERMINISM) {
            usageInfo = " (for deterministic order only)";
        } else if (m_purpose == FOR_GROUPING) {
            usageInfo = " (for optimized grouping only)";
        } else {
            usageInfo = " (for sort order only)";
        }
        // Introduce on its own indented line, any unrelated post-filter applied to the result.
        // e.g. " filter by OTHER_COL = 1"
        predicatePrefix = "\n" + indent + " filter by ";
    } else {
        int indexSize = CatalogUtil.getCatalogIndexSize(m_catalogIndex);
        String[] asIndexed = new String[indexSize];
        // they beat an NPE.
        for (int ii = 0; ii < keySize; ++ii) {
            asIndexed[ii] = "(index key " + ii + ")";
        }
        String jsonExpr = m_catalogIndex.getExpressionsjson();
        // if this is a pure-column index...
        if (jsonExpr.isEmpty()) {
            // grab the short names of the indexed columns in use.
            for (ColumnRef cref : m_catalogIndex.getColumns()) {
                Column col = cref.getColumn();
                asIndexed[cref.getIndex()] = col.getName();
            }
        } else {
            try {
                List<AbstractExpression> indexExpressions = AbstractExpression.fromJSONArrayString(jsonExpr, m_tableScan);
                int ii = 0;
                for (AbstractExpression ae : indexExpressions) {
                    asIndexed[ii++] = ae.explain(getTableNameForExplain());
                }
            } catch (JSONException e) {
            // If something unexpected went wrong,
            // just fall back on the positional key labels.
            }
        }
        // Explain the search criteria that describe the start of the index scan, like
        // "(event_type = 1 AND event_start > x.start_time)"
        String start = explainSearchKeys(asIndexed, keySize);
        if (m_lookupType == IndexLookupType.EQ) {
            // " scan matches for (event_type = 1) AND (event_location = x.region)"
            if (m_catalogIndex.getUnique()) {
                usageInfo = "\n" + indent + " uniquely match " + start;
            } else {
                usageInfo = "\n" + indent + " scan matches for " + start;
            }
        } else if (m_lookupType == IndexLookupType.GEO_CONTAINS) {
            usageInfo = "\n" + indent + " scan for " + start;
        } else {
            usageInfo = "\n" + indent;
            if (isReverseScan()) {
                usageInfo += "reverse ";
            }
            // " " range-scan on 1 of 2 cols from event_type = 1"
            if (indexSize == keySize) {
                usageInfo += "range-scan covering from " + start;
            } else {
                usageInfo += String.format("range-scan on %d of %d cols from %s", keySize, indexSize, start);
            }
            // Explain the criteria for continuinuing the scan such as
            // "while (event_type = 1 AND event_start < x.start_time+30)"
            // or label it as a scan "to the end"
            usageInfo += explainEndKeys();
        }
        // Introduce any additional filters not related to the index
        // that could cause rows to be skipped.
        // e.g. "... scan ... from ... while ..., filter by OTHER_COL = 1"
        predicatePrefix = ", filter by ";
    }
    // Describe any additional filters not related to the index
    // e.g. "...filter by OTHER_COL = 1".
    String predicate = explainPredicate(predicatePrefix);
    // Describe the table name and either a user-provided name of the index or
    // its user-specified role ("primary key").
    String tableName = m_targetTableName;
    if (m_targetTableAlias != null && !m_targetTableAlias.equals(m_targetTableName)) {
        tableName += " (" + m_targetTableAlias + ")";
    }
    String retval = "INDEX SCAN of \"" + tableName + "\"";
    String indexDescription = " using \"" + m_targetIndexName + "\"";
    // Replace ugly system-generated index name with a description of its user-specified role.
    if (m_targetIndexName.startsWith(HSQLInterface.AUTO_GEN_PRIMARY_KEY_PREFIX) || m_targetIndexName.startsWith(HSQLInterface.AUTO_GEN_NAMED_CONSTRAINT_IDX) || m_targetIndexName.equals(HSQLInterface.AUTO_GEN_MATVIEW_IDX)) {
        indexDescription = " using its primary key index";
    }
    // Bring all the pieces together describing the index, how it is scanned,
    // and whatever extra filter processing is done to the result.
    retval += indexDescription;
    retval += usageInfo + predicate;
    return retval;
}