我想将Postgresql数据库中的所有列名重新命名为小写我刚刚编写了一个sql函数.以下是代码.
CREATE OR REPLACE FUNCTION update_column_names() RETURNS boolean AS $$ DECLARE aRow RECORD; aRow2 RECORD; tbl_name TEXT; col_name TEXT; new_col_name TEXT; BEGIN FOR aRow IN select table_name from information_schema.tables where table_schema='public' and table_type='BASE TABLE' LOOP SELECT aRow.table_name INTO tbl_name from current_catalog; FOR aRow2 IN select column_name from information_schema.columns where table_schema='public' and table_name = aRow.table_name LOOP SELECT aRow2.column_name INTO col_name from current_catalog; new_col_name:=lower(col_name); RAISE NOTICE 'Table name:%',tbl_name; RAISE NOTICE 'Column name:%',aRow2.column_name; RAISE NOTICE 'New column name:%',new_col_name; ALTER TABLE tbl_name RENAME COLUMN col_name TO new_col_name; END LOOP; END LOOP; RETURN true; END; $$LANGUAGE plpgsql;
你需要使用
dynamic SQL这样做;表名不能是变量.
⋮ EXECUTE 'ALTER TABLE ' || quote_ident(tbl_name) || ' RENAME COLUMN ' || quote_ident(col_name) || ' TO ' || quote_ident(new_col_name); ⋮
或类似