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我正在尝试对Postgresql使用动态SQL。我坚持尝试使用另一个EXECUTE
声明中的db_row
RECORD中的id
字段。现场id
设置在创纪录的变量,但我仍然得到错误:postgresql,无法识别记录数据类型中的列
ERROR: could not identify column "id" in record data type
LINE 1: SELECT $1.id FROM audit.portfolio WHERE alter_type = 'INSERT...
^
QUERY: SELECT $1.id FROM audit.portfolio WHERE alter_type = 'INSERT' AND id = $1.id
CONTEXT: PL/pgSQL function inline_code_block line 14 at EXECUTE
这是我的数据和测试功能:
CREATE TABLE IF NOT EXISTS public.portfolio
(
id INTEGER NOT NULL,
name CHARACTER VARYING,
CONSTRAINT portfolio_pkey PRIMARY KEY (id)
)
WITH (OIDS = FALSE);
CREATE TABLE IF NOT EXISTS audit.portfolio
(
alter_type TEXT,
id INTEGER NOT NULL,
name CHARACTER VARYING,
CONSTRAINT portfolio_pkey PRIMARY KEY (id)
)
WITH (OIDS = FALSE
);
INSERT INTO public.portfolio (id, name) VALUES (1, 'NAME 1'), (2, 'NAME 2');
-- temp function
DO $$
DECLARE
db_row RECORD;
pk_val BIGINT;
BEGIN
FOR db_row IN EXECUTE format(
'SELECT *, 100 AS created_by_id, %L::TIMESTAMP AS creation_time FROM public.%I ORDER BY %I',
'2014-01-01 00:00:00', 'portfolio', 'id', 'id')
LOOP
RAISE NOTICE 'db_row.id: %', db_row.id;
EXECUTE
format(
'SELECT $1.%I FROM audit.%I WHERE alter_type = %L AND %I = $1.%I',
'id', -- this will be dynamic and change when table change
'portfolio', -- this will be dynamic and change when table change
'INSERT',
'id', -- this will be dynamic and change when table change
'id' -- this will be dynamic and change when table change
)
INTO pk_val
USING db_row;
RAISE NOTICE 'pk_val: %', pk_val;
END LOOP;
END$$;
好像Postgres的EXECUTE ... USING db_row
没有看到的db_row
就是喜欢完整结构从表中排。
我的最终目标是创造功能,将采取任何现有的表名 做到这一点:
EXECUTE
format(
'SELECT $1.%I FROM audit.%I WHERE alter_type = %L AND %I = $1.%I',
'primary_key_col',
'table_name',
'INSERT',
'primary_key_col',
'primary_key_col'
)
INTO pk_val
USING db_row
如何知道的Postgres在此EXECUTE
语句中使用db_row.id
价值?
这也许可以提供帮助。 http://stackoverflow.com/questions/14065271/how-to-use-execute-format-using-in-postgres-function – McNets
在这个例子中,我知道表名,列和主键的名称。但在真实的代码中,我不会。所以我不能使用'USING db_row.id,db_row.col2'等。 – piotrekkr