“Postgre”是日期类型,但表达式是文本类型。

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英文:

Postgre, is of type date but expression is of type text

问题

I have error

错误: 列 "portfolio_end_date" 的类型为日期,但表达式的类型为文本
第 5 行: portfolio_end_date = tmp.portfolio_end_date,
^
提示: 您需要重新编写或转换表达式。
SQL 状态: 42804
字符: 186

为什么PostgreSQL返回错误

UPDATE ods2.project_portfolios as tbl 
set id_portfolio = tmp.id_portfolio,
id_project_link = tmp.id_project_link,
portfolio_start_date = tmp.portfolio_start_date,
portfolio_end_date = tmp.portfolio_end_date, 
id_employee = tmp.id_employee,
portfolio_changed_date = tmp.portfolio_changed_date,
portfolio_quarter = tmp.portfolio_quarter,
end_month = tmp.end_month,
historicity_time = tmp.historicity_time
from (
values (
	491533570142,
	25, 
	'2022-07-01'::date,
	NULL,
	51,
	'2023-02-28 14:27:24'::timestamp,

	NULL,
		'2022-07-01'::date,
	'2023-03-20 23:00:16'::timestamp)
) as tmp(
	id_portfolio, id_project_link, portfolio_start_date, portfolio_end_date, id_employee,
	portfolio_changed_date, portfolio_quarter, end_month, historicity_time)
	where tbl.id_portfolio = tmp.id_portfolio and tbl.historicity_time between 
	'2023-05-25 00:00:00' and '2023-05-25 23:59:59';

请求失败,尽管我看不到任何错误。

英文:

i have error

ERROR: column "portfolio_end_date" is of type date but expression is of type text
LINE 5: portfolio_end_date = tmp.portfolio_end_date,
^
HINT: You will need to rewrite or cast the expression.
SQL state: 42804
Character: 186

Why potgre retrun error

UPDATE ods2.project_portfolios as tbl 
set id_portfolio = tmp.id_portfolio,
id_project_link = tmp.id_project_link,
portfolio_start_date = tmp.portfolio_start_date,
portfolio_end_date = tmp.portfolio_end_date, 
id_employee = tmp.id_employee,
portfolio_changed_date = tmp.portfolio_changed_date,
portfolio_quarter = tmp.portfolio_quarter,
end_month = tmp.end_month,
historicity_time = tmp.historicity_time
from (
values (
	491533570142,
	25, 
	'2022-07-01'::date,
	NULL,
	51,
	'2023-02-28 14:27:24'::timestamp,

	NULL,
		'2022-07-01'::date,
	'2023-03-20 23:00:16'::timestamp)
) as tmp(
	id_portfolio, id_project_link, portfolio_start_date, portfolio_end_date, id_employee,
	portfolio_changed_date, portfolio_quarter, end_month, historicity_time)
	where tbl.id_portfolio = tmp.id_portfolio and tbl.historicity_time between 
	'2023-05-25 00:00:00' and '2023-05-25 23:59:59';

Request fails although I don't see any errors in it

答案1

得分: 0

If an element in a VALUES statement is not a number and is not explicitly cast to a different data type, it will resolve as type text:

SELECT pg_typeof(col)
FROM (VALUES (NULL)) AS v(col);

 pg_typeof 
═══════════
 text
(1 row)

Now there is no assignment cast between text and date:

\dC date

                                      List of casts
         Source type                  Target type           Function      Implicit?   
═════════════════════════════╪═════════════════════════════╪═════════════╪═══════════════
 date                         timestamp with time zone     timestamptz  yes
 date                         timestamp without time zone  timestamp    yes
 timestamp with time zone     date                         date         in assignment
 timestamp without time zone  date                         date         in assignment
(4 rows)

Therefore you get the error you observe.

Add an explicit type cast:

UPDATE ods2.project_portfolios 
SET portfolio_end_date = tmp.portfolio_end_date, ...
FROM (VALUES (CAST (NULL AS date), ...)) AS tmp (portfolio_end_date, ...)
WHERE ...;
英文:

If an element in a VALUES statement is not a number and is not explicitly cast to a different data type, it will resolve as type text:

SELECT pg_typeof(col)
FROM (VALUES (NULL)) AS v(col);

 pg_typeof 
═══════════
 text
(1 row)

Now there is no assignment cast between text and date:

\dC date

                                      List of casts
         Source type         │         Target type         │  Function   │   Implicit?   
═════════════════════════════╪═════════════════════════════╪═════════════╪═══════════════
 date                        │ timestamp with time zone    │ timestamptz │ yes
 date                        │ timestamp without time zone │ timestamp   │ yes
 timestamp with time zone    │ date                        │ date        │ in assignment
 timestamp without time zone │ date                        │ date        │ in assignment
(4 rows)

Therefore you get the error you observe.

Add an explicit type cast:

UPDATE ods2.project_portfolios 
SET portfolio_end_date = tmp.portfolio_end_date, ...
FROM (VALUES (CAST (NULL AS date), ...)) AS tmp (portfolio_end_date, ...)
WHERE ...;

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  • 本文由 发表于 2023年5月25日 23:58:01
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