这两个查询只是通过在否定查询周围添加括号来返回不同的结果。我无法理解为什么第二个查询只是通过添加括号来返回空结果。
没有括号:
{
"responseHeader": {
"status": 0,
"QTime": 0,
"params": {
"q": "*:*",
"indent": "true",
"fq": "-fl_monitoring_channel: 36 AND (title: salesforce)",
"wt": "json",
"_": "1467637035433"
}
},
"response": {
"numFound": 35541,
"start": 0,
"docs": [...
使用括号:
{
"responseHeader": {
"status": 0,
"QTime": 0,
"params": {
"q": "*:*",
"indent": "true",
"fq": "(-fl_monitoring_channel: 36) AND (title: salesforce)",
"wt": "json",
"_": "1467637344339"
}
},
"response": {
"numFound": 0,
"start": 0,
"docs": []
}
}
我仍然不明白这里发生了什么。 没有括号:
"debug": {
"rawquerystring": "*:*",
"querystring": "*:*",
"parsedquery": "MatchAllDocsQuery(*:*)",
"parsedquery_toString": "*:*",
"explain": {
"brief.1054522": "\n1.0 = *:*, product of:\n 1.0 = boost\n 1.0 = queryNorm\n",
"brief.1070810": "\n1.0 = *:*, product of:\n 1.0 = boost\n 1.0 = queryNorm\n",
"brief.1067146": "\n1.0 = *:*, product of:\n 1.0 = boost\n 1.0 = queryNorm\n",
"brief.1067658": "\n1.0 = *:*, product of:\n 1.0 = boost\n 1.0 = queryNorm\n",
"brief.1112418": "\n1.0 = *:*, product of:\n 1.0 = boost\n 1.0 = queryNorm\n",
"brief.1112426": "\n1.0 = *:*, product of:\n 1.0 = boost\n 1.0 = queryNorm\n",
"brief.1058810": "\n1.0 = *:*, product of:\n 1.0 = boost\n 1.0 = queryNorm\n",
"brief.1070274": "\n1.0 = *:*, product of:\n 1.0 = boost\n 1.0 = queryNorm\n",
"brief.1062330": "\n1.0 = *:*, product of:\n 1.0 = boost\n 1.0 = queryNorm\n",
"brief.1064650": "\n1.0 = *:*, product of:\n 1.0 = boost\n 1.0 = queryNorm\n"
},
"QParser": "LuceneQParser",
"filter_queries": [
"-fl_monitoring_channel: 36 AND (title: salesforce)"
],
"parsed_filter_queries": [
"-fl_monitoring_channel:36 +title:salesforc"
],
"timing": {
"time": 33,
"prepare": {
"time": 0,
"query": {
"time": 0
},
"facet": {
"time": 0
},
"facet_module": {
"time": 0
},
"mlt": {
"time": 0
},
"highlight": {
"time": 0
},
"stats": {
"time": 0
},
"expand": {
"time": 0
},
"debug": {
"time": 0
}
},
"process": {
"time": 32,
"query": {
"time": 28
},
"facet": {
"time": 0
},
"facet_module": {
"time": 0
},
"mlt": {
"time": 0
},
"highlight": {
"time": 0
},
"stats": {
"time": 0
},
"expand": {
"time": 0
},
"debug": {
"time": 4
}
}
}
使用括号:
"debug": {
"rawquerystring": "*:*",
"querystring": "*:*",
"parsedquery": "MatchAllDocsQuery(*:*)",
"parsedquery_toString": "*:*",
"explain": {},
"QParser": "LuceneQParser",
"filter_queries": [
"(-fl_monitoring_channel: 36) AND (title: salesforce)"
],
"parsed_filter_queries": [
"+(-fl_monitoring_channel:36) +title:salesforc"
],
"timing": {
"time": 0,
"prepare": {
"time": 0,
"query": {
"time": 0
},
"facet": {
"time": 0
},
"facet_module": {
"time": 0
},
"mlt": {
"time": 0
},
"highlight": {
"time": 0
},
"stats": {
"time": 0
},
"expand": {
"time": 0
},
"debug": {
"time": 0
}
},