带有联合的 PostgreSQL 函数不返回所有记录

如何解决带有联合的 PostgreSQL 函数不返回所有记录

我正在尝试创建一个复杂的函数，我只喜欢我需要它做的第 3 步。这个东西对我来说有点提前。所以，我尝试了跟随 sql，我得到了 2 条记录——这正是我所期望的。但是，当我在函数（和输入变量）中尝试相同的 sql 时，我只得到 1 条记录。如果我删除第一个 select 和 union 语句，我会得到另一条记录。我传递给我们的唯一参数 userUuid。

在 docker 容器上运行 - postgres:11.5-alpine

普通 sql：（按预期取回 2 条记录）

SELECT
        assets.name AS assetName,assets.uuid AS assetUuid,assets.workflow_uuid,projects.name,projects.uuid,projects.project_category_uuid,'Project Role' AS classtype
    FROM
        projects
        JOIN assets ON assets.project_uuid = projects.uuid
    WHERE projects.project_category_uuid IN (
        SELECT projectCategoryUuid FROM "UserProjectCategoryRoles" 
        WHERE "UserProjectCategoryRoles".user_uuid = '65a749ee-5417-4187-a1b1-bcfa9a401267'
        
    )
    UNION ALL
    SELECT
        assets.name AS assetName,'Workflow Role' AS classtype
    FROM
        assets
        JOIN projects ON projects.uuid = assets.project_uuid
    
    WHERE assets.workflow_uuid IN (
        SELECT workflowUuid FROM "UserWorkflowRoles" 
        WHERE "UserWorkflowRoles".user_uuid = '65a749ee-5417-4187-a1b1-bcfa9a401267'
        
    );

不工作功能（只能返回或记录）

CREATE OR REPLACE PROCEDURE "public"."revisionsForReview"(
    IN userUuid VARCHAR,INOUT name VARCHAR,INOUT uuid VARCHAR,INOUT project_category_uuid VARCHAR,INOUT assetName VARCHAR,INOUT assetUuid VARCHAR,INOUT workflow_uuid VARCHAR,INOUT classtype VARCHAR
)
 AS $BODY$BEGIN
        SELECT
            projects.name,assets.name AS assetName,'Project Role' AS classtype
        FROM
            projects
            JOIN assets ON assets.project_uuid = projects.uuid
        WHERE projects.project_category_uuid IN (
            SELECT projectCategoryUuid FROM "UserProjectCategoryRoles" 
            WHERE "UserProjectCategoryRoles".user_uuid = userUuid 
        )
        UNION ALL
        SELECT
            projects.name,'Workflow Role' AS classtype
        FROM
            assets
            JOIN projects ON projects.uuid = assets.project_uuid
        WHERE assets.workflow_uuid IN (
            SELECT workflowUuid FROM "UserWorkflowRoles" 
            WHERE "UserWorkflowRoles".user_uuid = userUuid
        )
        INTO name,uuid,project_category_uuid,assetName,assetUuid,workflow_uuid,classtype;

END$BODY$
    LANGUAGE plpgsql

感谢帮助，再次，这是我功能的开始。在返回数据之前，我需要弄清楚如何循环遍历数据并对数据执行其他操作。到目前为止，我只想了解一些事情。我通常可以在 PHP Laravel 中做所有事情并使用它的迁移。但是这些连接和处理将需要在应用程序中进行更长的处理，并运行多个数据库调用。联合也在查询视图，我以后可能会删除这些视图，并将所有内容保留在函数中。

提前致谢！

解决方法

感谢“粘滞位”指出使用函数而不是存储过程。让它工作（在调整了一些类型转换之后 - 我发现这真的很奇怪，因为它与文本不同，认为从应用程序消费的角度来看它们是相同的，但我想不完全相同）。

我只会发布最终有效的内容 - 以防其他人遇到类似问题

CREATE OR REPLACE FUNCTION revisions_for_review (
    input_user_uuid VARCHAR
)
RETURNS TABLE (
    asset_name TEXT,asset_uuid VARCHAR,name VARCHAR,uuid VARCHAR,project_category_uuid VARCHAR,workflow_uuid VARCHAR,class_type TEXT
        )
LANGUAGE plpgsql
AS $$
DECLARE

 BEGIN
        RETURN QUERY SELECT
            assets.name::TEXT AS asset_name,assets.uuid AS asset_uuid,assets.workflow_uuid,projects.name,projects.uuid,projects.project_category_uuid,'Project Role' AS class_type
        FROM
            projects
            JOIN assets ON assets.project_uuid = projects.uuid
        WHERE projects.project_category_uuid IN (
            SELECT projectCategoryUuid FROM "UserProjectCategoryRoles" 
            WHERE "UserProjectCategoryRoles".user_uuid = input_user_uuid 
        )
        UNION ALL
        SELECT
            assets.name::TEXT AS asset_name,'Workflow Role' AS class_type
        FROM
            assets
            JOIN projects ON projects.uuid = assets.project_uuid
        WHERE assets.workflow_uuid IN (
            SELECT workflowUuid FROM "UserWorkflowRoles" 
            WHERE "UserWorkflowRoles".user_uuid = input_user_uuid
        );
        

END;$$