Question

我想将数组参数输入 Firebird存储过程。

：INPUT_LIST_ID = [1,2,12,45,75,45]

我需要执行这个SQL命令：

SELECT *
FROM CITY
WHERE ID_CITY IN (:INPUT_LIST_ID)

有可能吗？谢谢！

Answer 1

您也可以使用以下内容：

SELECT *
FROM CITY
WHERE ID_CITY IN (SELECT ID FROM GetIntegerList('1, 2, 12, 45, 75, 45'))

你必须创建一个名为“GetIntegerList”的新Firebird程序，它看起来像这样：

CREATE OR ALTER PROCEDURE "GETINTEGERLIST"("AINTEGERLIST" VARCHAR(32000))
returns (
  ID integer
)
as
  declare variable IntegerList varchar(32000);
  declare variable CommaPos integer;
  declare variable IntegerVal varchar(10);
begin
  IntegerList = AIntegerList || ' ';
  CommaPos = Position(',', IntegerList);

  while (CommaPos > 0) do
  begin
    IntegerVal = Trim(SubString(IntegerList from 1 for CommaPos - 1));

    if (Char_Length(IntegerVal) > 0) then
    begin
      if (IntegerVal similar to '[0-9]*') then
      begin
        ID = Cast(IntegerVal as integer);
        suspend;
      end
    end

    if (Char_Length(IntegerList) > CommaPos) then
      IntegerList = SubString(IntegerList from CommaPos + 1);
    else
      IntegerList = '';

    CommaPos = Position(',', IntegerList);
  end

  IntegerList = Trim(IntegerList);

  if (Char_Length(IntegerList) > 0) then
  begin
    if (IntegerList similar to '[0-9]*') then
    begin
      ID = Cast(IntegerList as integer);
      suspend;
    end
  end
end

注意，这是在Firebird 2.5.2中完成的。

Answer 2

AFAIK不，那是不可能的。虽然Firebird确实有阵列数据类型，但对它的支持是基本的，并且通常不建议使用数组。我认为最简单的解决方案是将数组作为（逗号分隔）字符串传递，然后使用for execute statement语句获取结果集，如

create procedure CITY (INPUT_LIST_ID varchar(1024)) 
returns( ... )
as
begin
  for execute statement
    'select ... from T where ID_CITY IN ('|| INPUT_LIST_ID ||')' into ...
  do begin
     suspend;
  end
end

但这意味着您用于获取结果的语句也会更改，而不是WHERE您将使用存储过程的参数CITY：

SELECT * FROM CITY('1, 2, 12, 45, 75, 45')

发送参数列表的另一个选项是使用global temporary table。有专家，您可以发送大量的ID而不超过允许的最大语句大小，但设置呼叫更有效...

create global temporary table SP_CITY_PARAMS (
  id int not null primary key
)
on commit delete rows;

create procedure CITY
returns( ... )
as
begin
  for select ... from T where ID_CITY IN (
      select id from SP_CITY_PARAMS
  ) into ...
  do begin
     suspend;
  end
end

Answer 3

试试这个：

    SELECT *
    FROM CITY
    WHERE '/city1/city2/city.../' containing '/' || ID_CITY || '/';

Answer 4

如果您使用Firebird 1.5（它也适用于更高版本），您可以使用我所做的这个简单函数将单个字符串转换为整数数组：

create or alter procedure INTEGER_LIST (
    input varchar(4096))
returns (
    INT_VALUE integer)
as
declare variable CHAR_COUNT integer;
declare variable PARAM_LENGTH integer;
declare variable READ_VALUE char(1);
declare variable CURRENT_INTEGER varchar(20);
begin
    param_length = strlen(input);
    char_count = 0;
    current_integer = '';
    while (char_count < param_length) do begin
        char_count = :char_count + 1;
        read_value = substr(:input, :char_count, :char_count);
        if (:read_value <> ',') then begin
            current_integer = :current_integer || :read_value;
        end else if (:read_value <> ' ') then  begin
            int_value = cast(:current_integer as integer);
            current_integer = '';
            suspend;
        end

        if (:char_count = :param_length) then begin
            int_value = cast(:current_integer as integer);
            suspend;
        end
    end
end

<强>用法

select int_value from integer_list('1,2,3,4, 5, 200, 1, 598415, 2')

将返回此：

INT_VALUE
1
2
3
4
5
200
1
598415
2

如何向Firebird存储过程输入值的数组参数？

4 个答案: