func (si *SchemaInfo) GetPlan(logStats *SQLQueryStats, sql string, queryRuleInfo *QueryRuleInfo) *ExecPlan {
// Fastpath if plan already exists.
if plan := si.getQuery(sql); plan != nil {
return plan
}
si.mu.Lock()
defer si.mu.Unlock()
// Recheck. A plan might have been built by someone else.
if plan := si.getQuery(sql); plan != nil {
return plan
}
var tableInfo *TableInfo
GetTable := func(tableName string) (table *schema.Table, ok bool) {
tableInfo, ok = si.tables[tableName]
if !ok {
return nil, false
}
return tableInfo.Table, true
}
splan, err := planbuilder.GetExecPlan(sql, GetTable)
if err != nil {
panic(NewTabletError(FAIL, "%s", err))
}
plan := &ExecPlan{ExecPlan: splan, TableInfo: tableInfo}
plan.Rules = queryRuleInfo.filterByPlan(sql, plan.PlanId, plan.TableName)
plan.Authorized = tableacl.Authorized(plan.TableName, plan.PlanId.MinRole())
if plan.PlanId.IsSelect() {
if plan.FieldQuery == nil {
log.Warningf("Cannot cache field info: %s", sql)
} else {
conn := getOrPanic(si.connPool)
defer conn.Recycle()
sql := plan.FieldQuery.Query
start := time.Now()
r, err := conn.ExecuteFetch(sql, 1, true)
logStats.AddRewrittenSql(sql, start)
if err != nil {
panic(NewTabletError(FAIL, "Error fetching fields: %v", err))
}
plan.Fields = r.Fields
}
} else if plan.PlanId == planbuilder.PLAN_DDL || plan.PlanId == planbuilder.PLAN_SET {
return plan
}
si.queries.Set(sql, plan)
return plan
}
// GetStreamPlan is similar to GetPlan, but doesn't use the cache
// and doesn't enforce a limit. It just returns the parsed query.
func (si *SchemaInfo) GetStreamPlan(sql string, queryRuleInfo *QueryRuleInfo) *ExecPlan {
var tableInfo *TableInfo
GetTable := func(tableName string) (table *schema.Table, ok bool) {
si.mu.Lock()
defer si.mu.Unlock()
tableInfo, ok = si.tables[tableName]
if !ok {
return nil, false
}
return tableInfo.Table, true
}
splan, err := planbuilder.GetStreamExecPlan(sql, GetTable)
if err != nil {
panic(NewTabletError(FAIL, "%s", err))
}
plan := &ExecPlan{ExecPlan: splan, TableInfo: tableInfo}
plan.Rules = queryRuleInfo.filterByPlan(sql, plan.PlanId, plan.TableName)
plan.Authorized = tableacl.Authorized(plan.TableName, plan.PlanId.MinRole())
return plan
}