ALTER TABLE "BLADE_WF_DRAFT"
    ADD ("TASK_ID" NVARCHAR2(255));

CREATE UNIQUE INDEX "WF_IDX_DRAFT_UNI2"
    ON "BLADE_WF_DRAFT" ("USER_ID", "TASK_ID", "PLATFORM");

COMMENT ON COLUMN "BLADE_WF_DRAFT"."TASK_ID" IS '任务id'
