无法在视图定义 PostgreSQL 中创建临时表

Question

CREATE  VIEW  viewRebalancingLog AS


CREATE TEMP TABLE newSessionID
(
  ilog_id INT,vch_service_name VARCHAR(200), vch_service_id  VARCHAR(200),iuser_id INT,vch_session_id  VARCHAR(200),
  isequence_id INT,vch_message_type  VARCHAR(200),vch_message_sub_type  VARCHAR(200),vch_message  VARCHAR,
  dt_service_log_time TIMESTAMP,dt_inserted_date TIMESTAMP
)


 INSERT INTO newSessionID
      ("ilog_id", "vch_service_name", "vch_service_id"  , "iuser_id" , "vch_session_id"  , "isequence_id" ,
  "vch_message_type"  ,"vch_message_sub_type","vch_message","dt_service_log_time","dt_inserted_date"
)
SELECT
     "LOGS"."ilog_id", "LOGS"."vch_service_name","LOGS"."vch_service_id","LOGS"."iuser_id" ,"LOGS"."vch_session_id"  ,
  "LOGS"."isequence_id" ,"LOGS"."vch_message_type"  ,"LOGS"."vch_message_sub_type" ,"LOGS"."vch_message",
  "LOGS"."dt_service_log_time","LOGS"."dt_inserted_date"
  FROM services_logs_stg AS "LOGS"
   WHERE ("LOGS".dt_service_log_time AT TIME ZONE 'UTC' AT TIME ZONE 'America/New_York') :: DATE =
         (((NOW() -
           INTERVAL '2 day')  :: TIMESTAMP) AT TIME ZONE 'UTC' AT TIME ZONE 'America/New_York') :: DATE

Answer 1

您不能在 VIEW 中创建临时表。检查创建视图：

创建 [ 或替换 ] [ TEMP | TEMPORARY ] [ RECURSIVE ] VIEW name [ ( column_name [, ...] ) ] [ WITH ( view_option_name [= view_option_value] [, ... ] ) ] AS 查询

为什么不使用 simple CREATE VIEW ... AS SELECT：

CREATE  VIEW  viewRebalancingLog AS
SELECT
     "LOGS"."ilog_id", "LOGS"."vch_service_name","LOGS"."vch_service_id","LOGS"."iuser_id" ,"LOGS"."vch_session_id"  ,
  "LOGS"."isequence_id" ,"LOGS"."vch_message_type"  ,"LOGS"."vch_message_sub_type" ,"LOGS"."vch_message",
  "LOGS"."dt_service_log_time","LOGS"."dt_inserted_date"
  FROM services_logs_stg AS "LOGS"
   WHERE ("LOGS".dt_service_log_time AT TIME ZONE 'UTC' AT TIME ZONE 'America/New_York') :: DATE =
         (((NOW() -
           INTERVAL '2 day')  :: TIMESTAMP) AT TIME ZONE 'UTC' AT TIME ZONE 'America/New_York') :: DATE;

如果您需要某种中间步骤，请考虑使用common table expressions.

编辑：

不，这不是我发布的查询的结尾，我有更多的临时表并相互连接。我的目标是： 1.create temp table1, 2.insert data in temp table1 than 3.create temp table 2 4.insert data in temp table 2 5.create temp table 3 6.insert data from temp1 join temp2 7. select *来自 temp3

你可以CTE像我之前建议的那样简单地使用：

WITH temp1 AS (
    SELECT  ...
    FROM ...
), temp2 AS (
    SELECT ...
    FROM ...
)
SELECT *
FROM temp1
JOIN temp2
  ON ...