雪花立即执行到变量中

Question

我有一个 table，其中一列包含我要执行的 SQL 查询。这些查询是某种质量检查（例如“select count(*) from the table where col = x”）。因此，现在我遍历 table 中的行，进行特定查询并执行它，并将该查询的实际值（结果）放入变量中。 Snowflake 脚本可以做到这一点吗？

Answer 1

是的，如果我通过“变量”理解你想要什么......

一些设置：

CREATE table test.test2.to_do(checks string);

INSERT INTO to_do values ('select count(*) from test.test2.to_do;');

现在一些 Snowflake 脚本从“检查 table”
然后运行那个SQL
然后将结果捕获到变量中

declare
  counts int;
  total_counts int := 0; 
  c1 cursor for select checks from test.test2.to_do;
begin

  for record in c1 do
    execute immediate record.checks;
    
    select  into counts from table(result_scan(last_query_id()));
    total_counts := total_counts + counts;
  end for;
  return total_counts;
end;

anonymous block
1

加强这些检查：

INSERT INTO to_do values ('select sum(10) from test.test2.to_do;');

select * from test.test2.to_do;

CHECKS
select count(*) from test.test2.to_do;
select sum(10) from test.test2.to_do;

运行上面的脚本 SQL 再次：

anonymous block
22

但是我们可以直接注射吗？

INSERT INTO to_do values ('select count(*) into counts from test.test2.to_do;');
INSERT INTO to_do values ('select sum(10) into counts from test.test2.to_do;');

改变方块：

declare
  counts int;
  total_counts int := 0; 
  c1 cursor for select checks from test.test2.to_do;
begin

  for record in c1 do
    execute immediate record.checks;
    
    --select  into counts from table(result_scan(last_query_id()));
    total_counts := total_counts + counts;
  end for;
  return total_counts;
end;

和运行：

Error: 'STATEMENT_ERROR' on line 8 at position 4 : SQL compilation error: error line 1 at position 0 INTO clause is not allowed in this context (line 8)

NO 阻塞，所以上次查询是..

雪花立即执行到变量中

Snowflake execute immediate into variable

snowflake-cloud-data-platform

但是我们可以直接注射吗？