在postgresql数据库中重命名列名
我想将PostgreSQL数据库中的所有列名重命名为小写。我刚刚编写了一个sql函数。下面是代码在postgresql数据库中重命名列名,postgresql,plpgsql,Postgresql,Plpgsql,我想将PostgreSQL数据库中的所有列名重命名为小写。我刚刚编写了一个sql函数。下面是代码 CREATE OR REPLACE FUNCTION update_column_names() RETURNS boolean AS $$ DECLARE aRow RECORD; aRow2 RECORD; tbl_name TEXT; col_name TEXT; new_col_name TEXT; BEGIN FOR aRow IN select table_name from
CREATE OR REPLACE FUNCTION update_column_names() RETURNS boolean AS $$
DECLARE
aRow RECORD;
aRow2 RECORD;
tbl_name TEXT;
col_name TEXT;
new_col_name TEXT;
BEGIN
FOR aRow IN select table_name from information_schema.tables where table_schema='public' and table_type='BASE TABLE' LOOP
SELECT aRow.table_name INTO tbl_name from current_catalog;
FOR aRow2 IN select column_name from information_schema.columns where table_schema='public' and table_name = aRow.table_name LOOP
SELECT aRow2.column_name INTO col_name from current_catalog;
new_col_name:=lower(col_name);
RAISE NOTICE 'Table name:%',tbl_name;
RAISE NOTICE 'Column name:%',aRow2.column_name;
RAISE NOTICE 'New column name:%',new_col_name;
ALTER TABLE tbl_name RENAME COLUMN col_name TO new_col_name;
END LOOP;
END LOOP;
RETURN true;
END;
$$ LANGUAGE plpgsql;
上述代码给出的关系tbl_名称不存在。代码有什么问题?您需要使用;表名不能是变量
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EXECUTE 'ALTER TABLE ' || quote_ident(tbl_name) || ' RENAME COLUMN '
|| quote_ident(col_name) || ' TO ' || quote_ident(new_col_name);
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或类似