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b->>jsonb_array_element_text(jsonb,int4)\u5426jsonb\u5426int4text \u76ee\u5f55 pg_operator \u5b58\u50a8\u5173\u4e8e\u64cd\u4f5c\u7b26\u7684\u4fe1\u606f\u3002\u8be6\u89c1 CREATE OPERATOR \u548c\u7b2c\u00a037.12\u00a0\u8282\u3002\n
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