在执行 postgreql 函数时提交事务 [英] Committing transactions while executing a postgreql Function

问题描述

我有 Postgresql 函数，它必须将大约 150 万条数据插入到一个表中.我想要的是我想看到表被每一条记录插入填充.目前，当我尝试使用大约 1000 条记录时发生的情况，只有在执行完整函数后才会填充 get.如果我中途停止该函数，则不会填充任何数据.即使在插入一定数量的记录后停止，如何使记录提交?

I have Postgresql Function which has to INSERT about 1.5 million data into a table. What I want is I want to see the table getting populated with every one records insertion. Currently what is happening when I am trying with say about 1000 records, the get gets populated only after the complete function gets executed. If I stop the function half way through, no data gets populated. How can I make the record committed even if I stop after certain number of records have been inserted?

推荐答案

这可以使用 dblink 来完成.我展示了一个示例，其中提交了一个插入，您需要添加 while 循环逻辑并提交每个循环.您可以 http://www.postgresql.org/docs/9.3/static/contrib-dblink-connect.html

This can be done using dblink. I showed an example with one insert being committed you will need to add your while loop logic and commit every loop. You can http://www.postgresql.org/docs/9.3/static/contrib-dblink-connect.html

CREATE OR REPLACE FUNCTION log_the_dancing(ip_dance_entry text)
RETURNS INT AS
$BODY$
    DECLARE
    BEGIN
        PERFORM dblink_connect('dblink_trans','dbname=sandbox port=5433 user=postgres');
        PERFORM dblink('dblink_trans','INSERT INTO dance_log(dance_entry) SELECT ' || '''' || ip_dance_entry || '''');
        PERFORM dblink('dblink_trans','COMMIT;');
        PERFORM dblink_disconnect('dblink_trans'); 

        RETURN 0;
    END;
$BODY$
  LANGUAGE plpgsql VOLATILE
  COST 100;

ALTER FUNCTION log_the_dancing(ip_dance_entry text)
  OWNER TO postgres;

BEGIN TRANSACTION;
  select log_the_dancing('The Flamingo');
  select log_the_dancing('Break Dance');
  select log_the_dancing('Cha Cha');
ROLLBACK TRANSACTION;

--Show records committed even though we rolled back outer transaction
select *
from dance_log;

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