20 lines
800 B
SQL
20 lines
800 B
SQL
-- 当前企微标签目录需要按 external_userid 判断客户是否仍有效。
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-- 覆盖 external_userid + delete_time，避免标签聚合逐条回表读取体积较大的客户 JSON 数据。
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SET @idx_external_delete_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'
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AND INDEX_NAME = 'idx_external_delete'
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);
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SET @add_idx_external_delete_sql := IF(
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@idx_external_delete_exists = 0,
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'ALTER TABLE `zyt_qywx_external_contact` ADD INDEX `idx_external_delete` (`external_userid`, `delete_time`)',
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'SELECT 1'
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);
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PREPARE add_idx_external_delete_stmt FROM @add_idx_external_delete_sql;
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EXECUTE add_idx_external_delete_stmt;
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DEALLOCATE PREPARE add_idx_external_delete_stmt;
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