128 lines
4.0 KiB
JavaScript
128 lines
4.0 KiB
JavaScript
/**
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* 检查数据库中所有表的主键ID分布情况
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* @file check-primary-keys.js
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* @description 分析各表的主键ID范围，为重新排序做准备
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*/
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const { sequelize } = require('./config/database-simple');
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const { QueryTypes } = require('sequelize');
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async function checkPrimaryKeys() {
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try {
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console.log('=== 检查数据库表主键ID分布情况 ===\n');
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// 获取所有表名
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const tables = await sequelize.query(
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"SELECT TABLE_NAME as table_name FROM information_schema.tables WHERE table_schema = DATABASE() AND table_type = 'BASE TABLE'",
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{ type: QueryTypes.SELECT }
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);
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console.log(`发现 ${tables.length} 个表:\n`);
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const tableStats = [];
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for (const table of tables) {
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const tableName = table.table_name;
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try {
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// 检查表是否有id字段
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const columns = await sequelize.query(
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`SELECT COLUMN_NAME as column_name, DATA_TYPE as data_type, IS_NULLABLE as is_nullable, COLUMN_KEY as column_key
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FROM information_schema.columns
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WHERE table_schema = DATABASE() AND TABLE_NAME = '${tableName}' AND COLUMN_NAME = 'id'`,
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{ type: QueryTypes.SELECT }
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);
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if (columns.length === 0) {
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console.log(`❌ ${tableName}: 没有id字段`);
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continue;
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}
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// 获取ID统计信息
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const stats = await sequelize.query(
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`SELECT
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COUNT(*) as total_count,
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MIN(id) as min_id,
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MAX(id) as max_id,
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COUNT(DISTINCT id) as unique_count
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FROM ${tableName}`,
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{ type: QueryTypes.SELECT }
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);
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const stat = stats[0];
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// 检查ID连续性
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const gapCheck = await sequelize.query(
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`SELECT COUNT(*) as gap_count
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FROM (
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SELECT id + 1 as next_id
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FROM ${tableName}
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WHERE id + 1 NOT IN (SELECT id FROM ${tableName})
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AND id < (SELECT MAX(id) FROM ${tableName})
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) as gaps`,
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{ type: QueryTypes.SELECT }
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);
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const hasGaps = gapCheck[0].gap_count > 0;
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const tableInfo = {
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tableName,
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totalCount: parseInt(stat.total_count),
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minId: stat.min_id,
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maxId: stat.max_id,
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uniqueCount: parseInt(stat.unique_count),
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hasGaps,
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needsReorder: stat.min_id !== 1 || hasGaps
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};
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tableStats.push(tableInfo);
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console.log(`✅ ${tableName}:`);
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console.log(` - 记录数: ${tableInfo.totalCount}`);
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console.log(` - ID范围: ${tableInfo.minId} - ${tableInfo.maxId}`);
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console.log(` - 唯一ID数: ${tableInfo.uniqueCount}`);
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console.log(` - 有间隙: ${hasGaps ? '是' : '否'}`);
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console.log(` - 需要重排: ${tableInfo.needsReorder ? '是' : '否'}`);
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console.log('');
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} catch (error) {
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console.log(`❌ ${tableName}: 检查失败 - ${error.message}`);
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}
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}
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// 汇总统计
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console.log('\n=== 汇总统计 ===');
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const needReorderTables = tableStats.filter(t => t.needsReorder);
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console.log(`需要重新排序的表: ${needReorderTables.length}/${tableStats.length}`);
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if (needReorderTables.length > 0) {
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console.log('\n需要重新排序的表:');
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needReorderTables.forEach(table => {
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console.log(`- ${table.tableName} (${table.minId}-${table.maxId}, ${table.totalCount}条记录)`);
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});
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}
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return tableStats;
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} catch (error) {
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console.error('检查主键失败:', error);
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throw error;
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} finally {
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await sequelize.close();
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}
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}
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// 如果直接运行此脚本
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if (require.main === module) {
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checkPrimaryKeys()
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.then(() => {
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console.log('\n检查完成!');
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process.exit(0);
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})
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.catch(error => {
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console.error('检查失败:', error);
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process.exit(1);
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});
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}
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module.exports = { checkPrimaryKeys }; |