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https://github.com/Syngnat/GoNavi.git
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04019135a0
- 兼容 query_plan 包装和新版 JSON V2 执行计划结构 - 补齐 covering index、table scan 等节点类型与统计归一化 - 增加新版 MySQL EXPLAIN 解析测试并修正 TotalCost 汇总逻辑
622 lines
22 KiB
Go
622 lines
22 KiB
Go
package app
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import (
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"encoding/json"
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"fmt"
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"strings"
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"GoNavi-Wails/internal/connection"
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)
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// MySQL FORMAT=JSON 解析。
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//
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// 典型结构（8.0+）：
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//
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// {
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// "query_block": {
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// "select_id": 1,
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// "cost_info": {"query_cost": "100.00"},
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// "table": { ... }, // 单表
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// "nested_loop": [{"table": {...}}], // 多表 JOIN
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// "ordering_operation": { ... }, // ORDER BY 包装
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// "grouping_operation": { ... }, // GROUP BY 包装
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// "duplicates_removal": { ... }
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// }
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// }
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//
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// 单个 table 节点字段：
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// - table_name / alias
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// - access_type：system/const/eq_ref/ref/range/index/ALL
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// - rows_examined_per_scan / rows_produced_per_join / filtered
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// - possible_keys / key / used_key_parts / key_length
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// - attached_condition / used_columns
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//
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// OceanBase MySQL 协议输出与 MySQL 8.0 几乎一致（可能多 range_info 列）。
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//
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// 5.7 不支持 FORMAT=JSON 时走 vanilla EXPLAIN，返回 8 列表格：id/select_type/table/type/
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// possible_keys/key/key_len/ref/rows/Extra（OceanBase 可能多 range_info），由 parseMySQLTableExplain 处理。
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func parseMySQLExplain(dbType, sourceSQL, raw string, format connection.ExplainFormat) (connection.ExplainResult, error) {
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result := connection.ExplainResult{
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DBType: dbType,
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SourceSQL: sourceSQL,
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}
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resetExplainNodeID()
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trimmed := strings.TrimSpace(raw)
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if trimmed == "" {
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return result, fmt.Errorf("MySQL EXPLAIN 返回空内容")
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}
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// FORMAT=JSON 模式
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if format == connection.ExplainFormatJSON || strings.HasPrefix(trimmed, "{") {
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plan, warnings, err := parseMySQLJSONExplain(trimmed)
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if err != nil {
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// JSON 解析失败但确实是 JSON 开头：报错让上层决定降级
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return result, fmt.Errorf("解析 MySQL FORMAT=JSON 失败：%w", err)
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}
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result.Nodes = plan.Nodes
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result.Edges = plan.Edges
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result.Warnings = warnings
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result.RawFormat = connection.ExplainFormatJSON
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result.RawPayload = raw
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finalizeExplainStats(&result)
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return result, nil
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}
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// 表格模式（5.7 fallback 或 Doris/StarRocks）
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parsed, err := parseMySQLTableExplain(raw)
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if err != nil {
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result.RawFormat = connection.ExplainFormatText
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result.RawPayload = raw
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result.Warnings = []string{fmt.Sprintf("表格解析失败：%v；保留原文供调试", err)}
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return result, nil
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}
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result.Nodes = parsed.Nodes
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result.Edges = parsed.Edges
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result.RawFormat = connection.ExplainFormatTable
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result.RawPayload = raw
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finalizeExplainStats(&result)
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return result, nil
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}
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// mysqlQueryBlock 对应 MySQL FORMAT=JSON 顶层 query_block。
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type mysqlQueryBlock struct {
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SelectID json.Number `json:"select_id"`
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CostInfo map[string]string `json:"cost_info"`
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Table *mysqlTableNode `json:"table"`
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NestedLoop []map[string]json.RawMessage `json:"nested_loop"`
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OrderingOperation *map[string]any `json:"ordering_operation"`
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GroupingOperation *map[string]any `json:"grouping_operation"`
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DuplicatesRemoval *map[string]any `json:"duplicates_removal"`
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Windowing *map[string]any `json:"windowing"`
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Distinct *map[string]any `json:"distinct"`
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Message string `json:"message"`
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}
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type mysqlTableNode struct {
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TableName string `json:"table_name"`
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Alias string `json:"alias"`
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AccessType string `json:"access_type"`
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RowsExaminedPerScan json.Number `json:"rows_examined_per_scan"`
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RowsProducedPerJoin json.Number `json:"rows_produced_per_join"`
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Filtered string `json:"filtered"`
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PossibleKeys []string `json:"possible_keys"`
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Key string `json:"key"`
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UsedKeyParts []string `json:"used_key_parts"`
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KeyLength json.Number `json:"key_length"`
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Ref []string `json:"ref"`
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RowsExaminedPerJoin json.Number `json:"rows_examined_per_join"`
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CostInfo map[string]string `json:"cost_info"`
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AttachedCondition string `json:"attached_condition"`
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AttachedSubqueries []map[string]any `json:"attached_subqueries"`
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UsingIntersection []map[string]any `json:"using_intersect"`
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Message string `json:"message"`
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}
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// parseMySQLJSONExplain 递归解析 MySQL FORMAT=JSON 输出。
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// 返回扁平的节点列表 + 解析过程中的警告（用于前端提示不识别的字段）。
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func parseMySQLJSONExplain(raw string) (*connection.ExplainResult, []string, error) {
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var top map[string]json.RawMessage
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if err := json.Unmarshal([]byte(raw), &top); err != nil {
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return nil, nil, fmt.Errorf("顶层 JSON 解析失败：%w", err)
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}
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qbRaw, ok := top["query_block"]
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if ok {
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result := &connection.ExplainResult{}
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var warnings []string
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// query_block 总成本
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var qb map[string]json.RawMessage
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if err := json.Unmarshal(qbRaw, &qb); err != nil {
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return nil, nil, fmt.Errorf("query_block 解析失败：%w", err)
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}
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if costRaw, ok := qb["cost_info"]; ok {
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var ci map[string]string
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if err := json.Unmarshal(costRaw, &ci); err == nil {
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result.Stats.TotalCost = parseExplainFloat64(ci["query_cost"])
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}
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}
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// 递归 query_block（可能套 ordering/grouping/distinct 等操作层）
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parseMySQLQueryBlock(qbRaw, "", result, &warnings)
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return result, warnings, nil
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}
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if rootRaw, ok := resolveMySQLJSONV2Root(top, raw); ok {
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return parseMySQLJSONExplainV2(rootRaw)
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}
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return nil, nil, fmt.Errorf("缺少 query_block 字段")
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}
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type mysqlJSONV2Node struct {
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Query string `json:"query"`
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Operation string `json:"operation"`
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AccessType string `json:"access_type"`
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TableName string `json:"table_name"`
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Alias string `json:"alias"`
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SchemaName string `json:"schema_name"`
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IndexName string `json:"index_name"`
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IndexAccessType string `json:"index_access_type"`
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Condition string `json:"condition"`
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LookupCondition string `json:"lookup_condition"`
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JoinType string `json:"join_type"`
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JoinAlgorithm string `json:"join_algorithm"`
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EstimatedRows json.Number `json:"estimated_rows"`
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EstimatedTotalCost json.Number `json:"estimated_total_cost"`
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ActualRows json.Number `json:"actual_rows"`
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ActualLoops json.Number `json:"actual_loops"`
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ActualFirstRowMs json.Number `json:"actual_first_row_ms"`
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ActualLastRowMs json.Number `json:"actual_last_row_ms"`
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Covering *bool `json:"covering"`
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UsedColumns []string `json:"used_columns"`
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KeyColumns []string `json:"key_columns"`
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Ranges []string `json:"ranges"`
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Inputs []json.RawMessage `json:"inputs"`
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}
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func resolveMySQLJSONV2Root(top map[string]json.RawMessage, raw string) (json.RawMessage, bool) {
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if queryPlanRaw, ok := top["query_plan"]; ok && len(strings.TrimSpace(string(queryPlanRaw))) > 0 {
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return queryPlanRaw, true
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}
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if isMySQLJSONV2Root(top) {
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return json.RawMessage(raw), true
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}
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return nil, false
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}
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func isMySQLJSONV2Root(top map[string]json.RawMessage) bool {
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if len(top) == 0 {
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return false
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}
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for _, key := range []string{"operation", "inputs", "access_type", "table_name", "estimated_total_cost"} {
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if _, ok := top[key]; ok {
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return true
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}
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}
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return false
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}
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func parseMySQLJSONExplainV2(rootRaw json.RawMessage) (*connection.ExplainResult, []string, error) {
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var rawMap map[string]json.RawMessage
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if err := json.Unmarshal(rootRaw, &rawMap); err != nil {
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return nil, nil, fmt.Errorf("新版根节点解析失败：%w", err)
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}
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var root mysqlJSONV2Node
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if err := json.Unmarshal(rootRaw, &root); err != nil {
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return nil, nil, fmt.Errorf("新版根节点反序列化失败：%w", err)
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}
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result := &connection.ExplainResult{}
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var warnings []string
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if root.EstimatedTotalCost != "" {
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result.Stats.TotalCost = parseExplainFloat64(root.EstimatedTotalCost.String())
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}
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parseMySQLJSONV2Node(rootRaw, "", result, &warnings, true)
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if len(result.Nodes) == 0 {
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return nil, nil, fmt.Errorf("新版 JSON 结构未解析出有效节点")
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}
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return result, warnings, nil
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}
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// parseMySQLQueryBlock 递归解析 query_block 内部结构。
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// MySQL FORMAT=JSON 是深度嵌套的"操作层"结构，每层可能包含 table、nested_loop、ordering_operation 等。
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func parseMySQLQueryBlock(qbRaw json.RawMessage, parentID string, result *connection.ExplainResult, warnings *[]string) {
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var qb mysqlQueryBlock
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if err := json.Unmarshal(qbRaw, &qb); err != nil {
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*warnings = append(*warnings, fmt.Sprintf("query_block JSON 反序列化失败：%v", err))
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return
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}
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// 单表：直接挂一个 table 节点
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if qb.Table != nil {
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node := buildMySQLTableNode(qb.Table)
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appendExplainChild(result, parentID, node)
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}
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// nested_loop：每个元素含 table，作为 parent 的子节点
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for _, item := range qb.NestedLoop {
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if tableRaw, ok := item["table"]; ok {
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var t mysqlTableNode
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if err := json.Unmarshal(tableRaw, &t); err == nil {
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node := buildMySQLTableNode(&t)
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appendExplainChild(result, parentID, node)
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}
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}
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}
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// 递归操作层：ordering_operation / grouping_operation / duplicates_removal / windowing
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type opLayer struct {
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raw json.RawMessage
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opType string
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}
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layers := []opLayer{}
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if qb.OrderingOperation != nil {
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// 反向取原始 JSON（结构体已 unmarshal，但用 raw 更通用）
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}
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// 直接遍历原始 qb map 更省事
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var qbMap map[string]json.RawMessage
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_ = json.Unmarshal(qbRaw, &qbMap)
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for key, val := range qbMap {
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switch key {
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case "ordering_operation":
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layers = append(layers, opLayer{raw: val, opType: connection.ExplainOpSort})
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case "grouping_operation":
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layers = append(layers, opLayer{raw: val, opType: connection.ExplainOpAggregate})
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case "duplicates_removal":
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layers = append(layers, opLayer{raw: val, opType: connection.ExplainOpOther})
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case "windowing":
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layers = append(layers, opLayer{raw: val, opType: connection.ExplainOpWindow})
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case "distinct":
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layers = append(layers, opLayer{raw: val, opType: connection.ExplainOpAggregate})
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}
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}
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for _, layer := range layers {
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// 操作层本身作为一个节点（供前端展示层次）
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layerNode := connection.ExplainNode{
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OpType: layer.opType,
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OpDetail: strings.Title(strings.ReplaceAll(layer.opType, "_", " ")),
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}
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layerID := appendExplainChild(result, parentID, layerNode)
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// 递归：操作层可能含 table、nested_loop、子操作层
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parseMySQLQueryBlock(layer.raw, layerID, result, warnings)
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}
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}
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func parseMySQLJSONV2Node(raw json.RawMessage, parentID string, result *connection.ExplainResult, warnings *[]string, isRoot bool) {
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var node mysqlJSONV2Node
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if err := json.Unmarshal(raw, &node); err != nil {
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*warnings = append(*warnings, fmt.Sprintf("新版 JSON 节点反序列化失败：%v", err))
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return
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}
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nextParentID := parentID
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if shouldAppendMySQLJSONV2Node(&node, isRoot) {
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nextParentID = appendExplainChild(result, parentID, buildMySQLJSONV2ExplainNode(&node, isRoot))
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}
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for _, child := range node.Inputs {
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parseMySQLJSONV2Node(child, nextParentID, result, warnings, false)
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}
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}
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func shouldAppendMySQLJSONV2Node(node *mysqlJSONV2Node, isRoot bool) bool {
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if node == nil {
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return false
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}
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if strings.TrimSpace(node.Operation) != "" {
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return true
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}
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if strings.TrimSpace(node.AccessType) != "" {
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return true
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}
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if strings.TrimSpace(node.TableName) != "" || strings.TrimSpace(node.IndexName) != "" {
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return true
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}
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if len(node.Inputs) == 0 && isRoot {
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return true
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}
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return false
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}
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func buildMySQLJSONV2ExplainNode(node *mysqlJSONV2Node, isRoot bool) connection.ExplainNode {
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if node == nil {
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return connection.ExplainNode{OpType: connection.ExplainOpOther}
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}
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lowerOperation := strings.ToLower(strings.TrimSpace(node.Operation))
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explainNode := connection.ExplainNode{
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OpType: classifyMySQLJSONV2OpType(node.AccessType, node.Operation, node.Covering),
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OpDetail: strings.TrimSpace(node.Operation),
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Table: strings.TrimSpace(node.TableName),
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Index: strings.TrimSpace(node.IndexName),
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EstRows: parseExplainInt64(node.EstimatedRows.String()),
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ActualRows: parseExplainInt64(node.ActualRows.String()),
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Loops: parseExplainInt64(node.ActualLoops.String()),
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DurationMs: parseExplainFloat64(node.ActualLastRowMs.String()),
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}
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if explainNode.DurationMs == 0 {
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explainNode.DurationMs = parseExplainFloat64(node.ActualFirstRowMs.String())
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}
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if cost := parseExplainFloat64(node.EstimatedTotalCost.String()); cost > 0 {
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if isRoot {
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explainNode.Cost = cost
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} else {
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if explainNode.Extra == nil {
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explainNode.Extra = map[string]any{}
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}
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explainNode.Extra["estimatedTotalCost"] = cost
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}
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}
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if strings.TrimSpace(node.Alias) != "" && node.Alias != node.TableName {
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if explainNode.Extra == nil {
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explainNode.Extra = map[string]any{}
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}
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explainNode.Extra["alias"] = node.Alias
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}
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if strings.TrimSpace(node.SchemaName) != "" {
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if explainNode.Extra == nil {
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explainNode.Extra = map[string]any{}
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}
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explainNode.Extra["schemaName"] = node.SchemaName
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}
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if strings.TrimSpace(node.Query) != "" {
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if explainNode.Extra == nil {
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explainNode.Extra = map[string]any{}
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}
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explainNode.Extra["query"] = node.Query
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}
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if strings.TrimSpace(node.Condition) != "" {
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if explainNode.Extra == nil {
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explainNode.Extra = map[string]any{}
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}
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explainNode.Extra["condition"] = node.Condition
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}
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if strings.TrimSpace(node.LookupCondition) != "" {
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if explainNode.Extra == nil {
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explainNode.Extra = map[string]any{}
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}
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explainNode.Extra["lookupCondition"] = node.LookupCondition
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}
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if strings.TrimSpace(node.JoinType) != "" {
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if explainNode.Extra == nil {
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explainNode.Extra = map[string]any{}
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}
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explainNode.Extra["joinType"] = node.JoinType
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}
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if strings.TrimSpace(node.JoinAlgorithm) != "" {
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if explainNode.Extra == nil {
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explainNode.Extra = map[string]any{}
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}
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explainNode.Extra["joinAlgorithm"] = node.JoinAlgorithm
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}
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if strings.TrimSpace(node.IndexAccessType) != "" {
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if explainNode.Extra == nil {
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explainNode.Extra = map[string]any{}
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}
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explainNode.Extra["indexAccessType"] = node.IndexAccessType
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}
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if node.Covering != nil {
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if explainNode.Extra == nil {
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explainNode.Extra = map[string]any{}
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}
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explainNode.Extra["covering"] = *node.Covering
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}
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if len(node.UsedColumns) > 0 {
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if explainNode.Extra == nil {
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explainNode.Extra = map[string]any{}
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}
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explainNode.Extra["usedColumns"] = node.UsedColumns
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}
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if len(node.KeyColumns) > 0 {
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if explainNode.Extra == nil {
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explainNode.Extra = map[string]any{}
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}
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explainNode.Extra["keyColumns"] = node.KeyColumns
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}
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if len(node.Ranges) > 0 {
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if explainNode.Extra == nil {
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explainNode.Extra = map[string]any{}
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}
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explainNode.Extra["ranges"] = node.Ranges
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}
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if explainNode.OpType == connection.ExplainOpScan || strings.Contains(lowerOperation, "table scan") {
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explainNode.Flags = append(explainNode.Flags, connection.ExplainFlagFullScan, connection.ExplainFlagNoIndex)
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}
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if explainNode.OpType == connection.ExplainOpSort || strings.Contains(lowerOperation, "filesort") {
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explainNode.Flags = append(explainNode.Flags, connection.ExplainFlagFilesort)
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}
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if strings.Contains(lowerOperation, "temporary") || strings.Contains(lowerOperation, "temp table") || strings.Contains(lowerOperation, "materialize") {
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explainNode.Flags = append(explainNode.Flags, connection.ExplainFlagTempTable)
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}
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return explainNode
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}
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func classifyMySQLJSONV2OpType(accessType, operation string, covering *bool) string {
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switch strings.ToLower(strings.TrimSpace(accessType)) {
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case "table":
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return connection.ExplainOpScan
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case "index":
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if covering != nil && *covering {
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return connection.ExplainOpIndexOnly
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}
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return connection.ExplainOpIndexScan
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||
case "filter":
|
||
return connection.ExplainOpFilter
|
||
case "join":
|
||
return connection.ExplainOpJoin
|
||
case "sort":
|
||
return connection.ExplainOpSort
|
||
case "aggregate":
|
||
return connection.ExplainOpAggregate
|
||
case "limit":
|
||
return connection.ExplainOpLimit
|
||
case "materialize":
|
||
return connection.ExplainOpMaterialize
|
||
case "window":
|
||
return connection.ExplainOpWindow
|
||
case "union":
|
||
return connection.ExplainOpUnion
|
||
case "subquery":
|
||
return connection.ExplainOpSubquery
|
||
}
|
||
|
||
lowerOperation := strings.ToLower(strings.TrimSpace(operation))
|
||
switch {
|
||
case strings.Contains(lowerOperation, "table scan"):
|
||
return connection.ExplainOpScan
|
||
case strings.Contains(lowerOperation, "covering index"):
|
||
return connection.ExplainOpIndexOnly
|
||
case strings.Contains(lowerOperation, "index lookup"),
|
||
strings.Contains(lowerOperation, "index range"),
|
||
strings.Contains(lowerOperation, "index scan"):
|
||
return connection.ExplainOpIndexScan
|
||
case strings.Contains(lowerOperation, "filter"):
|
||
return connection.ExplainOpFilter
|
||
case strings.Contains(lowerOperation, "join"):
|
||
return connection.ExplainOpJoin
|
||
case strings.Contains(lowerOperation, "sort"):
|
||
return connection.ExplainOpSort
|
||
case strings.Contains(lowerOperation, "aggregate"),
|
||
strings.Contains(lowerOperation, "group"):
|
||
return connection.ExplainOpAggregate
|
||
case strings.Contains(lowerOperation, "limit"):
|
||
return connection.ExplainOpLimit
|
||
case strings.Contains(lowerOperation, "materialize"):
|
||
return connection.ExplainOpMaterialize
|
||
case strings.Contains(lowerOperation, "window"):
|
||
return connection.ExplainOpWindow
|
||
case strings.Contains(lowerOperation, "union"):
|
||
return connection.ExplainOpUnion
|
||
case strings.Contains(lowerOperation, "subquery"):
|
||
return connection.ExplainOpSubquery
|
||
default:
|
||
return connection.ExplainOpOther
|
||
}
|
||
}
|
||
|
||
// buildMySQLTableNode 把 mysqlTableNode 转成归一化的 ExplainNode，并探测 Flags。
|
||
func buildMySQLTableNode(t *mysqlTableNode) connection.ExplainNode {
|
||
node := connection.ExplainNode{
|
||
OpType: classifyMySQLAccessType(t.AccessType),
|
||
OpDetail: fmt.Sprintf("access_type=%s", strings.ToLower(strings.TrimSpace(t.AccessType))),
|
||
Table: t.TableName,
|
||
Index: t.Key,
|
||
EstRows: parseExplainInt64(string(t.RowsExaminedPerScan)),
|
||
Cost: parseExplainFloat64(t.CostInfo["read_cost"]),
|
||
}
|
||
if t.Alias != "" && t.Alias != t.TableName {
|
||
node.Extra = map[string]any{"alias": t.Alias}
|
||
}
|
||
if t.AttachedCondition != "" {
|
||
if node.Extra == nil {
|
||
node.Extra = map[string]any{}
|
||
}
|
||
node.Extra["attachedCondition"] = t.AttachedCondition
|
||
}
|
||
if len(t.UsedKeyParts) > 0 {
|
||
if node.Extra == nil {
|
||
node.Extra = map[string]any{}
|
||
}
|
||
node.Extra["usedKeyParts"] = t.UsedKeyParts
|
||
}
|
||
// 探测 Flags
|
||
if node.OpType == connection.ExplainOpScan {
|
||
node.Flags = append(node.Flags, connection.ExplainFlagFullScan, connection.ExplainFlagNoIndex)
|
||
}
|
||
return node
|
||
}
|
||
|
||
// classifyMySQLAccessType 把 MySQL access_type 归一化到通用 OpType。
|
||
// ALL → SCAN，range/eq_ref/ref/index → INDEX_SCAN 或 INDEX_ONLY，其他 → OTHER。
|
||
func classifyMySQLAccessType(accessType string) string {
|
||
switch strings.ToLower(strings.TrimSpace(accessType)) {
|
||
case "all":
|
||
return connection.ExplainOpScan
|
||
case "index":
|
||
return connection.ExplainOpIndexOnly // 仅扫索引不回表
|
||
case "range":
|
||
return connection.ExplainOpIndexScan
|
||
case "eq_ref", "ref", "ref_or_null", "unique_subquery", "index_subquery":
|
||
return connection.ExplainOpIndexScan
|
||
case "const", "system":
|
||
return connection.ExplainOpOther // 单行命中，性能极佳
|
||
default:
|
||
return connection.ExplainOpOther
|
||
}
|
||
}
|
||
|
||
// parseMySQLTableExplain 解析 MySQL 5.7 表格 / Doris / StarRocks 的 EXPLAIN 输出。
|
||
// 标准 MySQL 表格列：id|select_type|table|type|possible_keys|key|key_len|ref|rows|Extra
|
||
// OceanBase 可能多 range_info；Doris/StarRocks 是完全不同的结构化文本（PR2 优化）。
|
||
func parseMySQLTableExplain(raw string) (*connection.ExplainResult, error) {
|
||
header, rows := parseExplainTSVRows(raw)
|
||
if len(header) == 0 || len(rows) == 0 {
|
||
return nil, fmt.Errorf("MySQL 表格 EXPLAIN 无有效行")
|
||
}
|
||
|
||
result := &connection.ExplainResult{}
|
||
colID := lookupTSVColumn(header, "id")
|
||
colType := lookupTSVColumn(header, "type")
|
||
colTable := lookupTSVColumn(header, "table")
|
||
colKey := lookupTSVColumn(header, "key")
|
||
colRows := lookupTSVColumn(header, "rows")
|
||
colExtra := lookupTSVColumn(header, "extra")
|
||
|
||
// MySQL 的 id 字段表达父子：相同 id 是同一 SELECT 内的 join，id 不同代表子查询
|
||
// 简化处理：每行作为独立节点，无父子（PR2 增强）
|
||
var lastID string
|
||
for _, row := range rows {
|
||
var idStr string
|
||
if colID >= 0 && colID < len(row) {
|
||
idStr = strings.TrimSpace(row[colID])
|
||
}
|
||
if idStr == "" {
|
||
idStr = lastID
|
||
}
|
||
lastID = idStr
|
||
|
||
var accessType string
|
||
if colType >= 0 && colType < len(row) {
|
||
accessType = strings.TrimSpace(row[colType])
|
||
}
|
||
node := connection.ExplainNode{
|
||
OpType: classifyMySQLAccessType(accessType),
|
||
OpDetail: fmt.Sprintf("id=%s type=%s", idStr, strings.ToLower(accessType)),
|
||
}
|
||
if colTable >= 0 && colTable < len(row) {
|
||
node.Table = strings.TrimSpace(row[colTable])
|
||
}
|
||
if colKey >= 0 && colKey < len(row) {
|
||
node.Index = strings.TrimSpace(row[colKey])
|
||
}
|
||
if colRows >= 0 && colRows < len(row) {
|
||
node.EstRows = parseExplainInt64(row[colRows])
|
||
}
|
||
if colExtra >= 0 && colExtra < len(row) {
|
||
extra := strings.TrimSpace(row[colExtra])
|
||
if extra != "" {
|
||
node.Extra = map[string]any{"extra": extra}
|
||
lower := strings.ToLower(extra)
|
||
if strings.Contains(lower, "using filesort") {
|
||
node.Flags = append(node.Flags, connection.ExplainFlagFilesort)
|
||
}
|
||
if strings.Contains(lower, "using temporary") {
|
||
node.Flags = append(node.Flags, connection.ExplainFlagTempTable)
|
||
}
|
||
}
|
||
}
|
||
if node.OpType == connection.ExplainOpScan {
|
||
node.Flags = append(node.Flags, connection.ExplainFlagFullScan, connection.ExplainFlagNoIndex)
|
||
}
|
||
appendExplainChild(result, "", node)
|
||
}
|
||
return result, nil
|
||
}
|