轰隆隆！ UNDEFINED-COLUMN：数据库错误 42703：列不存在

Question

我很难让 pgloader 在一个特定数据库上将 mysql 转换为 postgres。

运行 pgloader 时收到以下错误消息

[root@38AA08C pgsql]# pgloader pg_load
2023-06-21T03:13:59.006000+01:00 LOG pgloader version "3.6.7~devel"
2023-06-21T03:13:59.893030+01:00 LOG Migrating from #<MYSQL-CONNECTION mysql://******* {10068EB193}>
2023-06-21T03:13:59.893030+01:00 LOG Migrating into #<PGSQL-CONNECTION pgsql://******* {10068EB333}>
KABOOM!
UNDEFINED-COLUMN: Database error 42703: column ""output_ID"" of relation "hir_2016_model_assessment" does not exist
CONTEXT: PL/pgSQL function inline_code_block line 6 at FOR over SELECT rows
QUERY:
DO $$
DECLARE
  n integer := 0;
  r record;
BEGIN
  FOR r in
       SELECT 'select '
               || trim(trailing ')'

如您所见，该列确实存在

                                                                       Table "public.hir_2016_model_assessment"
         Column         |      Type      | Collation | Nullable |                            Default                             | Storage | Compression | Stats target | Description
------------------------+----------------+-----------+----------+----------------------------------------------------------------+---------+-------------+--------------+-------------
 output_ID              | bigint         |           | not null | nextval('"hir_2016_model_assessment_output_ID_seq"'::regclass) | plain   |             |              |
 project_ID             | integer        |           | not null |                                                                | plain   |             |              |

我的加载文件看起来像这样

LOAD DATABASE
   FROM      mysql://*****
   INTO postgresql://*****
   alter schema 'regen' rename to 'public'

   WITH
      include drop, create tables, create indexes, reset sequences, schema only, quote identifiers,
      multiple readers per thread, rows per range = 50000

   SET PostgreSQL PARAMETERS
      maintenance_work_mem to '1GB'

   SET MySQL PARAMETERS
      net_read_timeout  = '31536000',
      net_write_timeout = '31536000',
      lock_wait_timeout = '31536000'

   CAST
      type enum to text drop not null using empty-string-to-null,
      type date drop not null drop default using zero-dates-to-null,
      type datetime to timestamp drop default using zero-dates-to-null,
      type bigint when unsigned to numeric drop typemod,
      type bigint when (<= precision 20) to bigint drop typemod,
      type geography to bytea,
      type geometry  to point using convert-mysql-point,
      type point     to point using convert-mysql-point

   -- BEFORE LOAD DO
      -- $$ create extension if not exists postgis; $$
;

我一整天都在为此苦苦挣扎。有什么线索可能导致此失败吗？

Answer 1

这是 pgloader 中的一个已知问题，当针对区分大小写的列运行

reset sequences

选项时会发生该问题。但它尚未合并：https://github.com/dimitri/pgloader/pull/1509