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zeekayandHanzo Dev
d2d7565d4f
migrations.FS is every NNNN_name.sql, and Baseline names 0003 as the last one applied by hand: 0001 through 0003 are cutovers of the one live warehouse, each guarded to refuse any other state, so a ledger that starts empty records them rather than running them. 0004 and every migration after it run when cloud's o11y app starts. Co-authored-by: Hanzo Dev <[email protected]>
25 lines
1.1 KiB
Go
25 lines
1.1 KiB
Go
// Package migrations is the warehouse schema o11y owns, as the ordered statements
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// that built it: NNNN_name.sql, applied in version order, each at most once.
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//
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// The files are the schema's one statement. The process that owns the schema at
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// runtime applies them when it starts — hanzoai/cloud's o11y app, through
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// cloud/datastore.Migrate, under a lock that lets one replica run them and a
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// ledger that records what ran — so a migration merged here is live on the next
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// deploy, with no one to remember to run it.
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package migrations
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import "embed"
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// FS is every migration, by file name.
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//
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//go:embed *.sql
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var FS embed.FS
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// Baseline is the last migration that was applied by hand, before anything
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// recorded what had run. 0001 renamed the SigNoz databases, 0002 moved the old
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// trace tables aside and created event.fact, 0003 promoted the org-first sample
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// tables: each is the cutover of one live warehouse, guarded to refuse any other
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// state, and none can run a second time. A ledger that starts empty records them
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// as applied without running them; every migration after Baseline runs.
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const Baseline = 3
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