PostgreSQL migrations forDROP CONSTRAINTshould includeIF EXISTS This sounds minor, but would make migrations a lot less fragile when reverting / dealing with merge conflicts. Hopefully this is a simple change too 🙂 Current ALTER TABLE "social_groupmember" DROP CONSTRAINT "social_groupmember_group_...
postgres=# As we’ve discussed, the Sales depends on the Customer table, which shows this error. Try the CASCADE option with the DROP statement. Here’s how we can do it. postgres=# DROP TABLE IF EXISTS Customer CASCADE; NOTICE: drop cascades to constraint sales_customer_id_fkey on tab...
Jira Link: DB-3946 Description In tpcc, we have a method enableForeignKeys, which creates FKs after data is loaded. In this method, drop constraint with 'if exists' is giving ERROR, causing this statement to fail, and as a result other a...
2) Drop a column that is referenced by a constraint First, attempt to remove the publisher_id column from the books table: ALTER TABLE books DROP COLUMN publisher_id; PostgreSQL issued the following error: ERROR: cannot drop table books column publisher_id because other objects depend on it ...
2) Drop a column that is referenced by a constraint First, attempt to remove the publisher_id column from the books table: ALTER TABLE books DROP COLUMN publisher_id; PostgreSQL issued the following error: ERROR: cannot drop table books column publisher_id because other objects depend on it ...
It will show the error of “ERROR: cannot drop index student_pkey because constraint student_pkey on table student requires it”. Examples of PostgreSQL DROP INDEX Below is an example of the drop index command in PostgreSQL. 1. Drop single Index Using Drop Index Command ...
postgres分区表 一、特性postgres分区表是数据层层面的, 相对于普通表在内部实现复杂,但是用户无感知.分区表是一种将大表拆分成多个小表的方式Hash 分区:根据特定列的哈希值将数据均匀分布到多个分区中。...Multi-Level分区: 分区表被分成多个分区后,这些分区还可以继续被分区,这样的分区表被称之为多级分区。......
$field =newXMLDBField('entry_id');// change the field type from ext to intif(field_exists($table, $field)) { $field->setAttributes(XMLDB_TYPE_INTEGER,'10', XMLDB_UNSIGNED, XMLDB_NOTNULL,null,null,null,'0','id'); $result = $result && change_field_type($table, $field); ...
execute('alter table application_template drop constraint if exists uniq_app_template_appid_key') 浏览完整代码 来源:20130417232735-account_and_applicat.py 项目:glennyonemitsu/MarkupHiveServer 示例30 def downgrade(): ### commands auto generated by Alembic - please adjust! ### op.execute("ALTER ...
fetchall(): if 'PRIMARY KEY ' in constraint_def: continue restore_queries.add(f'ALTER TABLE {schema_name}."{table_name}" ' f'ADD CONSTRAINT {constraint_name} {constraint_def};') drop_queries.add(f'ALTER TABLE {schema_name}."{table_name}" ' f'DROP CONSTRAINT {constraint_name};') ...