将 Microstrategy Cube 连接到 Postgres 物化视图

Question

我在 Postgres 数据库中创建了一个物化视图。当我创建与此 Postgres 数据库的 microstrategy 多维数据集连接时，我看不到此实体化视图。

谁能帮我理解为什么我看不到这个？

谢谢

Answer 1

找到解决此问题的方法...

您可以将视图创建为标准视图，将其连接到 Microstrategy，然后删除视图并创建为实体化视图。只要您保持相同的名称，这就会选择新创建的实体化视图。

Answer 2

您需要编辑仓库目录的读取设置。位置：Schema->Warehouse Catalog Options->Catalog->Read Settings

查询 tables：

SELECT n.nspname as NAME_SPACE,
  c.relname as TAB_NAME
FROM pg_catalog.pg_class c
     LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
WHERE c.relkind in ('v', 'm', 'r', 'p', '')
      AND n.nspname <> 'pg_catalog'
      AND n.nspname <> 'information_schema'
      AND n.nspname !~ '^pg_toast'
ORDER BY 1,2

列查询：在 table INFORMATION_SCHEMA.COLUMNS 上被挂到 LEFT JOIN（到目前为止对我来说没有问题）

SELECT DISTINCT
    nspname                                      AS NAME_SPACE,
    relname                                      AS TAB_NAME,
    attname                                      AS COL_NAME,
    typname                                      AS DATA_TYPE,
    COALESCE(B.CHARACTER_MAXIMUM_LENGTH, attlen) AS DATA_LEN,
    NUMERIC_PRECISION                            AS DATA_PREC,
    NUMERIC_SCALE                                AS DATA_SCALE
FROM
    pg_attribute A
JOIN
    pg_class C
ON
    A.attrelid = C.oid
JOIN
    pg_namespace N
ON
    C.relnamespace = N.oid
JOIN
    pg_type T
ON
    A.atttypid = T.oid
LEFT OUTER JOIN
    INFORMATION_SCHEMA.COLUMNS B
ON
    A.attname = B.COLUMN_NAME
AND C.relname = B.TABLE_NAME
AND N.nspname = B.TABLE_SCHEMA
WHERE
    relname IN (#TABLE_LIST#)
AND attnum > 0
ORDER BY
    1,
    2,
    3

尤其是列查询可以改进，但直到现在我还没有回头看它，因为它工作正常。

所有这些的原因可以在以下讨论中找到：Materialized views don't show up in information_schema。

将 Microstrategy Cube 连接到 Postgres 物化视图

Connecting Microstrategy Cube to a Postgres Materialized View

postgresql

materialized-views

microstrategy