在 Teradata 中删除未命名的参照完整性约束

Question

是否可以在 Teradata 中删除未命名的参照完整性约束？ 示例：

父表：

CREATE SET TABLE MIGRATION_TOOL.UNIT_TEST_EXISTING_TABLE_DEPENDENCY_PARENT,
    NO FALLBACK,
    NO BEFORE JOURNAL,
    NO AFTER JOURNAL,
    CHECKSUM = DEFAULT,
    DEFAULT MERGEBLOCKRATIO (
        ID INTEGER,
        NAME VARCHAR(50) CHARACTER SET LATIN NOT CASESPECIFIC NOT NULL,
        DESCRIPTION VARCHAR(50) CHARACTER SET LATIN NOT CASESPECIFIC NOT NULL,
        CREATION_DATE TIMESTAMP(6) DEFAULT CURRENT_TIMESTAMP(6),
        LAST_UPDATE TIMESTAMP(6) DEFAULT CURRENT_TIMESTAMP(6)
    )
UNIQUE PRIMARY INDEX UPI ( ID );

子表：

CREATE SET TABLE MIGRATION_TOOL.UNIT_TEST_EXISTING_TABLE_DEPENDENCY_CHILD,
    NO FALLBACK,
    NO BEFORE JOURNAL,
    NO AFTER JOURNAL,
    CHECKSUM = DEFAULT,
    DEFAULT MERGEBLOCKRATIO (
        ID INTEGER,
        NAME VARCHAR(50) CHARACTER SET LATIN NOT CASESPECIFIC NOT NULL,
        DESCRIPTION VARCHAR(50) CHARACTER SET LATIN NOT CASESPECIFIC NOT NULL,
        CREATION_DATE TIMESTAMP(6) DEFAULT CURRENT_TIMESTAMP(6),
        LAST_UPDATE TIMESTAMP(6) DEFAULT CURRENT_TIMESTAMP(6),
        PARENT_ID INTEGER,
        FOREIGN KEY ( PARENT_ID ) REFERENCES WITH NO CHECK OPTION MIGRATION_TOOL.UNIT_TEST_EXISTING_TABLE_DEPENDENCY_PARENT ( ID )
    )
UNIQUE PRIMARY INDEX UPI ( ID );

如何删除外键/软参照完整性规则？

Answer 1

好的，我找到了...

ALTER TABLE MIGRATION_TOOL.UNIT_TEST_EXISTING_TABLE_DEPENDENCY_CHILD
DROP FOREIGN KEY (PARENT_ID) REFERENCES 
MIGRATION_TOOL.UNIT_TEST_EXISTING_TABLE_DEPENDENCY_PARENT(ID);