存储过程/函数可以返回表吗?

2021-11-20 00:00:00 sql mysql stored-procedures

MySql 存储过程/函数能否在不使用临时表的情况下返回表?

Can a MySql stored procedure / function return a table without the use of temp table?

创建以下过程

CREATE PROCEDURE database.getExamples() 
    SELECT * FROM examples;

然后用

CALL database.getExamples()

显示示例表 - 正如预期的那样 - 但以下似乎不可能:

displays the example table - just as expected - but the following doesn't seem to be possible:

SELECT * FROM CALL database.getExamples()

是否可以从存储过程/函数返回查询结果表，如果可以，如何返回?

Is it possible at all to return a query result table from a stored procedure / function, and if so - how?

推荐答案

就目前而言，这是不可能的.

As for now, this is not possible.

这是文档 关于 FROM 子句中可能使用的内容:

Here is the documentation on what may be used in the FROM clause:

table_references:
    table_reference [, table_reference] ...

table_reference:
    table_factor
  | join_table

table_factor:
    tbl_name [[AS] alias] [index_hint)]
  | table_subquery [AS] alias
  | ( table_references )
  | { OJ table_reference LEFT OUTER JOIN table_reference
        ON conditional_expr }

join_table:
    table_reference [INNER | CROSS] JOIN table_factor [join_condition]
  | table_reference STRAIGHT_JOIN table_factor
  | table_reference STRAIGHT_JOIN table_factor ON conditional_expr
  | table_reference {LEFT|RIGHT} [OUTER] JOIN table_reference join_condition
  | table_reference NATURAL [{LEFT|RIGHT} [OUTER]] JOIN table_factor

join_condition:
    ON conditional_expr
  | USING (column_list)

index_hint:
    USE {INDEX|KEY} [FOR JOIN] (index_list)
  | IGNORE {INDEX|KEY} [FOR JOIN] (index_list)
  | FORCE {INDEX|KEY} [FOR JOIN] (index_list)

index_list:
    index_name [, index_name] ...

如您所见，存储过程不在此列表中.

As you can see, stored procedures are not in this list.

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