why hazelcast can not query incorrect result with imap and hazelcastjsonvalue

问题

I use IMap store data in hazelcast, key is a string, value is a hazelcastjsonvalue. code example: `

    Gson gson = new Gson();
    String json = "{\"orderId\":\"-20200822-221116-188-quote-100002\",\"securityId\":\"130015\",\"tradingAccount\":\"xtrinterbanktra01\",\"subSystemId\":\"QDM-ESP\",\"userId\":\"xtrinterbankat01\",\"securityExchange\":\"B\",\"systemNodeId\":710,\"quoteId\":\"1598145974197\",\"execId\":\"22550774606679263\",\"investAccount\":\"xtrinterbankinvest01\",\"productAccount\":\"xtrinterbankprod01\",\"assetAccount\":\"xtrinterbankasst01\",\"securityAccount\":\"111010032010000205011\",\"securityType\":\"4\",\"settlType\":\"1\",\"orderModel\":\"legs\",\"orderStatus\":\"8\",\"createdTime\":1598145974,\"createdDate\":\"20200824\",\"tradeDate\":\"20200824\",\"positionFlag\":1,\"price\":111.0,\"orderQty\":1.0E7,\"accumulatedExecQty\":1.0E7,\"lastQty\":1.0E7,\"finalFlag\":true,\"symbol\":\"13国债15\",\"side\":\"1\",\"orderVersion\":2,\"classType\":\"OrderBO\",\"messageId\":87350933198472267,\"uniqueKey\":\"-20200822-221116-188-quote-100002\",\"topicName\":\"order\",\"subject\":\"business/order/130015/B/xtrinterbanktra01/xtrinterbankat01\",\"publisherId\":\"oms-710-9577@168-61-73-136\",\"tenantId\":\"ficc\",\"extFields\":{\"quotaionType\":\"5\",\"clOrdId\":\"-20200822-221116-188-quote-100001\",\"marketIndicator\":\"4\",\"deliveryType\":\"0\",\"transcatTime\":\"1883635200\",\"quoteStaus\":\"16\",\"clearingMethod\":\"13\",\"execType\":\"F\",\"validUnitTime\":\"1883635200\"}}";

    String tableName = "__UT_TestMap";

    IMap map = instance.getMap(tableName);
    map.addIndex(new IndexConfig(IndexType.HASH,"orderId"));

    map.put("-20200822-221116-188-quote-100002",json);

    System.out.println(map.entrySet(Predicates.sql("side='1'")));

` condition is correct,but result is null,why? when I not add index , the result of query is correct.

回答1:

In your map.put, try changing the value clause from json to new HazelcastJsonValue(json))

The variable you've named json is actually a String, so it's a map of form Map<String, String>.

Hazelcast won't search inside a String for a field, because it won't know that it contains any form of structured data. You'll get an IllegalOperationException for the code posted.

If you use new HazelcastJsonValue(json)) for the entry's value, that makes it structured, and you can search (and index) on fields.

来源：https://stackoverflow.com/questions/63574076/why-hazelcast-can-not-query-incorrect-result-with-imap-and-hazelcastjsonvalue

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java

hazelcast

hazelcast-imap