mirror of https://gitee.com/bigwinds/arangodb
228 lines
5.0 KiB
Plaintext
228 lines
5.0 KiB
Plaintext
arangosh> stmt.explain({ optimizer: { rules: [ "-all", "+use-index-range" ] } });
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{
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"plan" : {
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"nodes" : [
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{
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"id" : 1,
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"estimatedCost" : 1,
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"estimatedNrItems" : 1
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},
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{
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"type" : "IndexRangeNode",
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"dependencies" : [
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1
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"id" : 9,
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"estimatedCost" : 48,
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"estimatedNrItems" : 47,
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"database" : "_system",
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"collection" : "test",
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"outVariable" : {
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"id" : 0,
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"name" : "i"
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},
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"ranges" : [
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[
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{
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"variable" : "i",
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"attr" : "value",
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"lowConst" : {
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"bound" : 97,
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"include" : false,
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"isConstant" : true
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},
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"highConst" : {
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"include" : false,
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"isConstant" : true
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},
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"lows" : [ ],
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"highs" : [ ],
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"valid" : true,
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"equality" : false
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}
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]
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],
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"index" : {
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"type" : "skiplist",
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"id" : "502002571",
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"unique" : false,
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"sparse" : false,
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"fields" : [
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"value"
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]
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},
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"reverse" : false
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},
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{
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"type" : "CalculationNode",
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"dependencies" : [
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9
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],
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"id" : 3,
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"estimatedCost" : 95,
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"estimatedNrItems" : 47,
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"expression" : {
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"type" : "compare >",
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"subNodes" : [
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{
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"type" : "attribute access",
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"name" : "value",
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"subNodes" : [
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{
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"type" : "reference",
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"name" : "i",
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"id" : 0
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}
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]
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},
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{
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"type" : "value",
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"value" : 97
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}
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]
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},
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"outVariable" : {
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"id" : 2,
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"name" : "1"
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},
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"canThrow" : false,
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"expressionType" : "simple"
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},
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{
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"type" : "FilterNode",
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"dependencies" : [
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3
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],
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"id" : 4,
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"estimatedCost" : 142,
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"estimatedNrItems" : 47,
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"inVariable" : {
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"id" : 2,
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"name" : "1"
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}
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},
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{
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"type" : "CalculationNode",
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"dependencies" : [
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4
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],
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"id" : 5,
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"estimatedCost" : 189,
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"estimatedNrItems" : 47,
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"expression" : {
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"type" : "attribute access",
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"name" : "value",
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"subNodes" : [
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{
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"type" : "reference",
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"name" : "i",
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"id" : 0
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}
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]
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},
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"outVariable" : {
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"id" : 4,
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"name" : "3"
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},
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"canThrow" : false,
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"expressionType" : "attribute"
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},
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{
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"type" : "SortNode",
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"dependencies" : [
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5
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],
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"id" : 6,
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"estimatedCost" : 369.95693728037276,
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"estimatedNrItems" : 47,
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"elements" : [
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{
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"inVariable" : {
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"id" : 4,
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"name" : "3"
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},
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"ascending" : true
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}
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],
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"stable" : false
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},
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{
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"type" : "CalculationNode",
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"dependencies" : [
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6
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],
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"id" : 7,
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"estimatedCost" : 416.95693728037276,
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"estimatedNrItems" : 47,
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"expression" : {
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"type" : "attribute access",
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"name" : "value",
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"subNodes" : [
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{
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"type" : "reference",
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"name" : "i",
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"id" : 0
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}
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]
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},
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"outVariable" : {
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"id" : 6,
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"name" : "5"
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},
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"canThrow" : false,
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"expressionType" : "attribute"
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},
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{
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"type" : "ReturnNode",
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"dependencies" : [
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7
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],
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"id" : 8,
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"estimatedCost" : 463.95693728037276,
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"estimatedNrItems" : 47,
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"inVariable" : {
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"id" : 6,
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"name" : "5"
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}
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}
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],
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"rules" : [
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"use-index-range"
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],
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"collections" : [
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{
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"name" : "test",
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"type" : "read"
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}
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],
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"variables" : [
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{
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"id" : 6,
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"name" : "5"
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},
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{
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"id" : 4,
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"name" : "3"
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},
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{
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"id" : 2,
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"name" : "1"
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},
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{
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"id" : 0,
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"name" : "i"
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}
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],
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"estimatedCost" : 463.95693728037276,
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"estimatedNrItems" : 47
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},
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"warnings" : [ ],
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"stats" : {
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"rulesExecuted" : 1,
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"rulesSkipped" : 21,
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"plansCreated" : 1
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}
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}
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