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Golang AggregationFunction.SetArgs方法代碼示例

本文整理匯總了Golang中github.com/pingcap/tidb/expression.AggregationFunction.SetArgs方法的典型用法代碼示例。如果您正苦於以下問題:Golang AggregationFunction.SetArgs方法的具體用法?Golang AggregationFunction.SetArgs怎麽用?Golang AggregationFunction.SetArgs使用的例子?那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在github.com/pingcap/tidb/expression.AggregationFunction的用法示例。


在下文中一共展示了AggregationFunction.SetArgs方法的1個代碼示例,這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚,您的評價將有助於係統推薦出更棒的Golang代碼示例。

示例1: decompose

// decompose splits an aggregate function to two parts: a final mode function and a partial mode function. Currently
// there are no differences between partial mode and complete mode, so we can confuse them.
func (a *aggPushDownSolver) decompose(aggFunc expression.AggregationFunction, schema expression.Schema, id string) ([]expression.AggregationFunction, expression.Schema) {
	// Result is a slice because avg should be decomposed to sum and count. Currently we don't process this case.
	result := []expression.AggregationFunction{aggFunc.Clone()}
	for _, aggFunc := range result {
		schema = append(schema, &expression.Column{
			ColName:  model.NewCIStr(fmt.Sprintf("join_agg_%d", len(schema))), // useless but for debug
			FromID:   id,
			Position: len(schema),
			RetType:  aggFunc.GetType(),
		})
	}
	aggFunc.SetArgs(expression.Schema2Exprs(schema[len(schema)-len(result):]))
	aggFunc.SetMode(expression.FinalMode)
	return result, schema
}
開發者ID:pingcap,項目名稱:tidb,代碼行數:17,代碼來源:aggregation_push_down.go


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