Question

我的桌子有一些内部预先修复，用户不得知道所以我做了这样的SP来检索线条。

CREATE PROCEDURE p_Test  
 ( inStation varchar(10) )  
RETURNS  
 ( ServiceName varchar(20) )  
AS    
DECLARE VARIABLE StationTable varchar(20);  
BEGIN   
  StationTable = 'TSTATION_' || Upper(Trim(inStation));  

  SELECT StationTable.ServiceName  
  FROM StationTable  
  INTO :ServiceName;  
  suspend;  

END^

我收到了这样的失败消息

SQL错误代码= -204
  表未知
  STATIONTABLE

我的fbclient.dll版本是2.1.2.18118 我的测试环境是Flamerobin 0.9.2.1851。

任何想法让这项工作？

Answer 1

你可以尝试使用execute block：

execute block (inStation varchar(10) = ?)
returns (ServiceName = varchar(20))
as
DECLARE variable SQL Varchar(300);
DECLARE VARIABLE StationTable varchar(20);
begin
    StationTable = 'TSTATION_' || Upper(Trim(inStation)); 
    SQL := 'SELECT ' || StationTable ||'.ServiceName FROM ' || StationTable || ' INTO :ServiceName;';
    execute STATEMENT sql;
    SUSPEND;
end

检查here

Answer 2

感谢您的提示，@ Hugues Van Landeghem。我使用两个关键字EXECUTE STATEMENT使其工作。这是我的SP：

CREATE PROCEDURE p_Test ( inStation varchar(10) )
RETURNS ( ServiceName varchar(20) )
AS
    DECLARE VARIABLE StationTable varchar(20);  
BEGIN   
    StationTable = 'TSTATION_' || Upper(Trim(inStation));  
    EXECUTE STATEMENT 'SELECT ServiceName FROM ' || StationTable INTO :ServiceName;
    SUSPEND;  
END^

如何制作Firebird SP，从一些动态表中获取线条？

2 个答案: