99 lines
3.5 KiB
Plaintext
99 lines
3.5 KiB
Plaintext
DELIMITER //
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CREATE OR REPLACE PROCEDURE get_tableschema(
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IN p_data NVARCHAR(100)
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)
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/*
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Function : 查詢檔案結構
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description:
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build date : 2023/08/23
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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 2023/08/23
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2 Michael 2025/07/20 改寫為 MariaDB 並最佳化(ChatGPT+DeepSeek)
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3 Assistant 2025/08/09 加入自動從information_schema讀取結構功能
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*/
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BEGIN
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DECLARE v_count INT;
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-- 檢查gex_filestru是否有資料
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SELECT COUNT(*) INTO v_count FROM gex_filestru;
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-- 如果沒資料, 就從information_schema讀取並寫入
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IF v_count = 0 THEN
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-- 先清空表(以防萬一)
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TRUNCATE TABLE gex_filestru;
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-- 從information_schema讀取所有表結構並插入到gex_filestru
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INSERT INTO gex_filestru (
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Table_name, table_description, seqno, field_name, field_desc,
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field_type, field_len, field_dec, table_pk, table_index,
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field_isnull, field_default
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)
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SELECT
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t.TABLE_NAME AS Table_name,
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'' AS table_description, -- 初始為空，可手動補充
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c.ORDINAL_POSITION AS seqno,
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c.COLUMN_NAME AS field_name,
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'' AS field_desc, -- 初始為空，可手動補充
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c.DATA_TYPE AS field_type,
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-- c.CHARACTER_MAXIMUM_LENGTH AS field_len,
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case when c.CHARACTER_MAXIMUM_LENGTH > 9999 then 9999 else c.CHARACTER_MAXIMUM_LENGTH end AS field_len,
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c.NUMERIC_SCALE AS field_dec,
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IF(kcu.COLUMN_NAME IS NOT NULL, 'Y', 'N') AS table_pk,
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'N' AS table_index, -- 初始為N，可根據實際索引調整
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IF(c.IS_NULLABLE = 'YES', 'Y', 'N') AS field_isnull,
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c.COLUMN_DEFAULT AS field_default
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FROM
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information_schema.TABLES t
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JOIN information_schema.COLUMNS c ON t.TABLE_NAME = c.TABLE_NAME AND t.TABLE_SCHEMA = c.TABLE_SCHEMA
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LEFT JOIN information_schema.KEY_COLUMN_USAGE kcu ON
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c.TABLE_NAME = kcu.TABLE_NAME AND
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c.COLUMN_NAME = kcu.COLUMN_NAME AND
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c.TABLE_SCHEMA = kcu.TABLE_SCHEMA AND
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kcu.CONSTRAINT_NAME = 'PRIMARY'
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WHERE
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t.TABLE_SCHEMA = DATABASE() AND
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t.TABLE_TYPE = 'BASE TABLE';
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-- 更新表描述為表注釋(如果有)
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UPDATE gex_filestru f
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JOIN information_schema.TABLES t ON f.Table_name = t.TABLE_NAME
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SET f.table_description = t.TABLE_COMMENT
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WHERE t.TABLE_SCHEMA = DATABASE();
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-- 更新字段描述為列注釋(如果有)
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UPDATE gex_filestru f
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JOIN information_schema.COLUMNS c ON f.Table_name = c.TABLE_NAME AND f.field_name = c.COLUMN_NAME
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SET f.field_desc = c.COLUMN_COMMENT
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WHERE c.TABLE_SCHEMA = DATABASE();
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END IF;
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-- 设置默认返回值
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SELECT 0 AS code, 'ok' AS msg;
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-- 查询表结构
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IF p_data = '*' THEN
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SELECT
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Table_name, table_description, seqno, field_name, field_desc,
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field_type, field_len, field_dec, table_pk, table_index,
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field_isnull, field_default
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FROM gex_filestru
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ORDER BY table_name, seqno;
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ELSE
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SELECT
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Table_name, table_description, seqno, field_name, field_desc,
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field_type, field_len, field_dec, table_pk, table_index,
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field_isnull, field_default
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FROM gex_filestru
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WHERE table_name LIKE CONCAT('%', p_data, '%')
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OR table_description LIKE CONCAT('%', p_data, '%')
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OR field_name LIKE CONCAT('%', p_data, '%')
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OR field_desc LIKE CONCAT('%', p_data, '%')
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ORDER BY table_name, seqno;
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END IF;
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END //
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DELIMITER ; |