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【DM版本】:
【操作系统】：
【CPU】:
【问题描述】*：

SQLSTATE[HY000]: General error: -70011 Invalid convert string (dpi_execute[4294897285] at /home/test/yx/trunk/dm_php//pdo7/dm_stmt.c:169) The SQL being executed was:
SELECT
/*+ PUSH_PRED(C) PUSH_PRED(D) PUSH_PRED(E) */
D.CONSTRAINT_NAME,
D.CONSTRAINT_TYPE,
C.COLUMN_NAME,
C.POSITION,
D.R_CONSTRAINT_NAME,
E.TABLE_NAME AS TABLE_REF,
F.COLUMN_NAME AS COLUMN_REF,
C.TABLE_NAME
FROM ALL_CONS_COLUMNS C
INNER JOIN ALL_CONSTRAINTS D
ON D.OWNER = C.OWNER
AND D.CONSTRAINT_NAME = C.CONSTRAINT_NAME
LEFT JOIN ALL_CONSTRAINTS E
ON E.OWNER = D.R_OWNER
AND E.CONSTRAINT_NAME = D.R_CONSTRAINT_NAME
LEFT JOIN ALL_CONS_COLUMNS F
ON F.OWNER = E.OWNER
AND F.CONSTRAINT_NAME = E.CONSTRAINT_NAME
AND F.POSITION = C.POSITION
WHERE C.OWNER = 'UC'
AND C.TABLE_NAME = 'uc_account_account'
ORDER BY D.CONSTRAINT_NAME,
C.POSITION
改成如下才可以，一般什么原因