Eiffel：ODBC 处理 BIGINT

Question

埃菲尔铁塔

我似乎从 ODBC with Eiffel DB_SELECTION.cursor 的 BIGINT 中得到了一个 INTEGER_32_REF。有时我似乎有足够的价值，但有时却没有...

946383958 => good INTEGER_32_REF (id->4 of following table)
9475984837 => 886050245 WRONG INTEGER_32_REF (id->4 of following table)

646383958 => good INTEGER_32_REF (id->3 of following table)
6475984837 => -2113949755 WRONG INTEGER_32_REF (id->4 of following table)

...

似乎不处理 BIGINT 并给出直接从 DB 值解释的 INTEGER_32_REF 值，典型情况下传递 2^32

PostgreSQL

有一个table，数据如下electricity_amount BIGINT NOT NULL DEFAULT 0

id |   a_date   |  amount   | electricity_amount | consumption_sector_id | electricity_rate_id
----+------------+-----------+--------------------+-----------------------+---------------------
1 | 2019-01-01 | 746383958 |         7475984837 |                     1 |                   1
2 | 2019-02-01 | 846383958 |         8475984837 |                     1 |                   1
3 | 2019-03-01 | 646383958 |         6475984837 |                     1 |                   1
4 | 2019-04-01 | 946383958 |         9475984837 |                     1 |                   1

Answer 1

默认情况下，并非所有数据类型都映射到 Eiffel 端。因此，您需要继承 class GLOBAL_SETTINGS 并调用该功能 set_use_extended_types (True) --| Use extended types: INTEGER_64, STRING_32 etc.

Eiffel：ODBC 处理 BIGINT

Eiffel: ODBC Dealing with BIGINT

odbc

eiffel

埃菲尔铁塔

PostgreSQL