FireDAC 在查询之前使用 DECLARE CURSOR

Question

当我在 PG Admin III 中执行以下查询时，它运行良好：

WITH new_values (updated_at,talker_id,sentence_id,v0,v1,v2,v3,v4,v5) AS (
    VALUES (current_timestamp,'2','3','4','5','6','7','8','9')
),
UPSERT AS (
    UPDATE utel u
    SET
        updated_at=nv.updated_at,
        v0=nv.v0,v1=nv.v1,v2=nv.v2,v3=nv.v3,v4=nv.v4,v5=nv.v5
    FROM
        new_values nv
    WHERE
        u.talker_id=nv.talker_id AND u.sentence_id=nv.sentence_id RETURNING u.*
)
INSERT into utel (updated_at,talker_id,sentence_id,v0,v1,v2,v3,v4,v5)
SELECT updated_at,talker_id,sentence_id,v0,v1,v2,v3,v4,v5
FROM new_values WHERE NOT EXISTS(
    SELECT 1 FROM upsert up
    WHERE
        up.talker_id=new_values.talker_id
        AND up.sentence_id=new_values.sentence_id
)

但是当我尝试通过 TFDQuery 执行它时，PostgreSQL 抱怨：

syntax error at or near "INSERT" at character 355

我打开 PostgreSQL 记录到 Windows 错误日志并看到以下内容：

DECLARE "10STM" CURSOR WITH HOLD FOR
WITH new_values (updated_at,talker_id,sentence_id,v0,v1,v2,v3,v4,v5) AS (
    VALUES (current_timestamp,'2','3','4','5','6','7','8','9')
),
UPSERT AS (
    UPDATE utel u
    SET
        updated_at=nv.updated_at,
        v0=nv.v0,v1=nv.v1,v2=nv.v2,v3=nv.v3,v4=nv.v4,v5=nv.v5
    FROM
        new_values nv
    WHERE
        u.talker_id=nv.talker_id AND u.sentence_id=nv.sentence_id RETURNING u.*
)
INSERT into utel (updated_at,talker_id,sentence_id,v0,v1,v2,v3,v4,v5)
SELECT updated_at,talker_id,sentence_id,v0,v1,v2,v3,v4,v5
FROM new_values WHERE NOT EXISTS(
    SELECT 1 FROM upsert up
    WHERE
        up.talker_id=new_values.talker_id
        AND up.sentence_id=new_values.sentence_id
)

当我在 PG Admin III 中使用 DECLARE "10STM" CURSOR WITH HOLD FOR 执行相同的操作时，我得到了完全相同的错误。

为什么 FireDAC 在 PG 查询之前使用游标以及如何避免这种情况？

Answer 1

Victoria 不想得到她的分数，所以这里是答案：

获取选项中的游标类型已设置为 ckAutomatic。我将其更改为 ckDefault，现在可以使用了。

FireDAC 在查询之前使用 DECLARE CURSOR

FireDAC precedes query with DECLARE CURSOR

postgresql

firedac