44 lines
1.4 KiB
JavaScript
44 lines
1.4 KiB
JavaScript
const export_gap = 50000000;
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const partition_gap = 50000000;
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const table = "comment_1024";
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const index = "comment_id";
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const exportTablePrefix = "comment_export_";
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// 数字转成字符串，同时在前面填充
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function fill(num, fillers, length) {
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var result = `${num}`;
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if (result.length < length)
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result = new Array(length - result.length + 1).join(fillers) + result;
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return result;
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}
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let sqlArr1 = [];
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let sqlArr2 = [];
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let sqlArr3 = [];
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for (let i = 200; i < 300; i++) {
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// for (let i = 100; i < 200; i++) {
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let where = `${index} >= ${fill(i * export_gap, ' ', 12)} and ${index} < ${fill((i + 1) * export_gap, ' ', 12)}`;
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let sql_create_table = `create table ${exportTablePrefix}${fill(i, '0', 4)} select * from ${table} where ${where};`;
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sqlArr1.push(sql_create_table);
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let sql_delete_rows = `DELETE FROM ${table} WHERE ${where};`;
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sqlArr2.push(sql_delete_rows);
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let sql_partition = ` PARTITION p${fill(i, '0', 4)} VALUES LESS THAN (${fill((i + 1) * partition_gap, ' ', 12)})`;
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sqlArr3.push(sql_partition);
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}
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sqlArr3.push(` PARTITION p_max VALUES LESS THAN MAXVALUE`);
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// 建表
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// console.log(sqlArr1.join('\n'));
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// 删除原表数据
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// console.log(sqlArr2.join('\n'));
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// 新创建表的分区
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// console.log(`partition (\n${sqlArr3.join(',\n')}\n)`);
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for (let i = 107; i < 200; i++) {
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console.log(`DROP TABLE IF EXISTS comment_export_${fill(i, '0', 4)};`);
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} |