Question

我在postgresql中有一个表，我希望它被分区。结构如下

TABLE "DTD1"."logAdminActivity" ( 
    "username" CHARACTER VARYING( 200 ) NOT NULL, 
    "action" CHARACTER VARYING( 100 ) NOT NULL, 
    "pk" CHARACTER VARYING( 5 )  NOT NULL, 
    "tabel" CHARACTER VARYING( 200 )NOT NULL, 
    "timestamp" TIMESTAMP WITHOUT TIME ZONE
);

然后我创建了一个继承Tabel“DTD1”的分区表。上面的“logAdminActivity”如下所示：

CREATE TABLE "DTD1".logAdminActivity_kategori ( 
    CHECK ('tabel'='kategori')
) INHERITS ("DTD1"."logAdminActivity");

CREATE TABLE "DTD1".logAdminActivity_subyek (
    CHECK ('tabel'='subyek')
 ) INHERITS ("DTD1"."logAdminActivity");

...

CREATE TABLE "DTD1".logAdminActivity_satuan (
    CHECK ('tabel'='satuan')
 ) INHERITS ("DTD1"."logAdminActivity");

CREATE TABLE "DTD1".logAdminActivity_memberfilter (
    CHECK ('tabel'='memberFilter')
 ) INHERITS ("DTD1"."logAdminActivity");

之后，我在username coloumn中为每个分区表创建索引。然后我创建了这个触发器函数并在下面触发该调用触发器函数。因此，当我插入数据时，相应的tabel coloumn将被重定向到正确的分区表。

CREATE OR REPLACE FUNCTION "DTD1".logAdminActivity_insert_trigger()
RETURNS TRIGGER AS $$
BEGIN
    IF ( New."tabel" = 'kategori' ) THEN
        INSERT INTO "DTD1".logAdminActivity_kategori VALUES (NEW.*);
    ELSIF ( New."tabel" = 'subyek' ) THEN
        INSERT INTO "DTD1".logAdminActivity_subyek VALUES (NEW.*);
    ..    
    ELSE
        RAISE EXCEPTION 'Tabel out of range.  Fix the logAdminActivity_insert_trigger() function!' ;
    END IF;
    RETURN NULL;
END;
$$
LANGUAGE plpgsql;

CREATE TRIGGER insert_logAdminActivity_trigger
    BEFORE INSERT ON "DTD1"."logAdminActivity"
    FOR EACH ROW EXECUTE PROCEDURE "DTD1".logAdminActivity_insert_trigger();

然后我通过插入程序测试它，如

INSERT INTO "DTD1"."logadminactivity_subyek" ( "action", "pk", "tabel", "timestamp", "username") 
VALUES ( 'bla', '12312', 'subyek', '2014-01-01 02:02:03', 'asdf' );

但为什么它返回错误看起来像这样

错误：关系“logadminactivity_subyek”的新行违反了检查约束“logadminactivity_subyek_check”DETAIL：失败的行包含（asdf，bla，subyek，12312,2014-01-01 02:02:03）。

如何发生这种情况，因为我试图按照此处的文档进行操作？

http://www.postgresql.org/docs/9.3/static/ddl-partitioning.html

我认为上面查询中的'tabel'值（'subyek'）与触发函数不匹配，但是当我检查check约束时它会通过。有没有我想念它的部分，还是有任何解决方案来解决这个问题？

此致

Answer 1

CHECK ('tabel'='subyek')

该检查约束不正确，因为'tabel'是常量。

相当于CHECK (false)。

你想要

CHECK ("tabel"='subyek')

插入分区表返回违反检查约束但不应该

1 个答案: