20 lines
823 B
SQL
20 lines
823 B
SQL
-- 客户列表按当前页 external_userid 批量读取加客渠道流水。
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-- 覆盖 change_type + external_userid + event_time，避免事件量增长后反复扫描全量 add 事件。
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SET @idx_change_ext_time_exists := (
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SELECT COUNT(*)
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FROM information_schema.STATISTICS
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WHERE TABLE_SCHEMA = DATABASE()
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AND TABLE_NAME = 'zyt_qywx_external_contact_event'
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AND INDEX_NAME = 'idx_change_ext_time'
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);
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SET @add_idx_change_ext_time_sql := IF(
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@idx_change_ext_time_exists = 0,
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'ALTER TABLE `zyt_qywx_external_contact_event` ADD INDEX `idx_change_ext_time` (`change_type`, `external_userid`, `event_time`, `id`)',
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'SELECT 1'
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);
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PREPARE add_idx_change_ext_time_stmt FROM @add_idx_change_ext_time_sql;
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EXECUTE add_idx_change_ext_time_stmt;
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DEALLOCATE PREPARE add_idx_change_ext_time_stmt;
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