15 lines
736 B
SQL
15 lines
736 B
SQL
-- 优化 tb_iot_card 索引：修复 PG 优化器在 shop_id IN 场景下选错执行计划的问题
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-- 问题：idx_iot_card_global_created_at 导致优化器选择全表扫描+Filter，而不是更高效的 partial 索引
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-- 30M 行场景下 status+carrier_id 过滤查询从 4.5s 降至 <200ms
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-- 1. 删除全局 created_at 索引（诱导优化器走错计划的元凶）
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DROP INDEX IF EXISTS idx_iot_card_global_created_at;
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-- 2. 新建 carrier_id 复合 partial 索引（覆盖运营商+排序场景）
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CREATE INDEX IF NOT EXISTS idx_iot_card_standalone_shop_carrier_created
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ON tb_iot_card (shop_id, carrier_id, created_at DESC)
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WHERE deleted_at IS NULL AND is_standalone = true;
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-- 3. 更新统计信息
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ANALYZE tb_iot_card;
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