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38 lines
1.7 KiB
SQL
38 lines
1.7 KiB
SQL
-- Knowledge Platform schema migration
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-- Migration id: 0035_research_task_answer_streaming
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-- Dialect: tidb
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-- Allows durable Research progress streams to carry bounded, batched answer deltas.
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-- TiDB DDL may commit before the migration marker, so both replacement steps are replay safe.
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SET @kfs_0035_progress_event_constraint_sql = IF(
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EXISTS(
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SELECT 1
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FROM information_schema.tidb_check_constraints
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WHERE constraint_schema = DATABASE()
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AND table_name = 'research_task_progress_events'
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AND constraint_name = 'research_task_progress_event_ck'
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),
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'ALTER TABLE `research_task_progress_events` DROP CHECK `research_task_progress_event_ck`',
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'DO 0'
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);
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PREPARE kfs_0035_progress_event_constraint_stmt
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FROM @kfs_0035_progress_event_constraint_sql;
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EXECUTE kfs_0035_progress_event_constraint_stmt;
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DEALLOCATE PREPARE kfs_0035_progress_event_constraint_stmt;
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SET @kfs_0035_progress_event_constraint_sql = IF(
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EXISTS(
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SELECT 1
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FROM information_schema.tidb_check_constraints
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WHERE constraint_schema = DATABASE()
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AND table_name = 'research_task_progress_events'
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AND constraint_name = 'research_task_progress_event_ck'
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),
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'DO 0',
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'ALTER TABLE `research_task_progress_events` ADD CONSTRAINT `research_task_progress_event_ck` CHECK (`event_type` IN (''research_task.answer_delta'', ''research_task.canceled'', ''research_task.failed'', ''research_task.paused'', ''research_task.resumed'', ''research_task.stage_changed'', ''research_task.started''))'
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);
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PREPARE kfs_0035_progress_event_constraint_stmt
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FROM @kfs_0035_progress_event_constraint_sql;
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EXECUTE kfs_0035_progress_event_constraint_stmt;
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DEALLOCATE PREPARE kfs_0035_progress_event_constraint_stmt;
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