61 lines
1.8 KiB
Plaintext
61 lines
1.8 KiB
Plaintext
DELIMITER //
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CREATE OR REPLACE FUNCTION `gf_trans_json_v7` (
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p_source TEXT,
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p_actions VARCHAR(1) -- C(reate) 或 U(pdate)
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)
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/*
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function : 將 amis 傳入的字串, 轉為標準 json 格式後回傳給 orm_api(配合 mariadb)
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修改自 gf_trans_json(已不使用)
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description: 呼叫範例 SELECT gf_trans_json_v7('xxxx', 'C');
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build date : 2021/09/26
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modify history
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item who date modify docs
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==== ========== ========== ================================================
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1 michael 2021/09/26 新增
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2 [改寫者] 2023/11/15 改寫為 MariaDB 版本並最佳化
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*/
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RETURNS TEXT
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DETERMINISTIC
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BEGIN
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DECLARE v_max INT;
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DECLARE v_now INT;
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DECLARE v_rets TEXT;
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DECLARE v_rows_pos INT;
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DECLARE v_rows_diff_pos INT;
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IF p_actions = 'C' THEN
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SET v_rets = SUBSTRING(p_source, 2, CHAR_LENGTH(p_source) - 1);
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-- step1: 先移除數字鍵 (最佳化：使用迴圈而非逐次檢查)
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SET v_now = 0;
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WHILE v_now <= 1000 DO
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IF INSTR(v_rets, CONCAT('"', v_now, '":')) > 0 THEN
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SET v_rets = REPLACE(v_rets, CONCAT('"', v_now, '":'), '');
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END IF;
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SET v_now = v_now + 1;
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END WHILE;
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-- 移除結尾多餘的 } 字符
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IF RIGHT(v_rets, 2) = '}}' THEN
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SET v_rets = LEFT(v_rets, CHAR_LENGTH(v_rets) - 1);
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END IF;
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SET v_rets = CONCAT('{[', v_rets, ']}');
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ELSEIF p_actions = 'U' THEN
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-- 找出 rows 和 rowsDiff 的位置
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SET v_rows_pos = INSTR(p_source, '"rows":');
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SET v_rows_diff_pos = INSTR(p_source, '"rowsDiff":');
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-- 擷取 rows 內容並格式化
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SET v_rets = SUBSTRING(p_source, 1, v_rows_diff_pos - 3);
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SET v_rets = SUBSTRING(v_rets, v_rows_pos + 8, CHAR_LENGTH(v_rets));
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SET v_rets = CONCAT('{[', v_rets, ']}');
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END IF;
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RETURN v_rets;
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END //
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DELIMITER ; |