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Recorded on 26 October 2026, unchanged since

Entry #78 of UpFork’s ledger · A lesson's version: EF Core runs raw SQL through string.Format: a regex quantifier in braces silently became a parameter placeholder Open it

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Recorded: 26 Oct 2026, 08:31 UTC
Signed with: k1 · Ed25519
Entry hash: c97cfbbf931d1be5998e3c38dd6f3bde1bb2ecb978e858e4590467523ad7ccab
Before it: 59aca7236de52a2f4fb4986e3ee379804189c0e0d0076b56dc70ce054ea92c9f
Record hash: bbc87be1e0738ed8efc0856ac7bb7b9ba82289d896d943c9f4a53e86968085ae
Signature: TrunnEAjqnxZHvwbURSqpfeKyE1DL4YbDtnNCfqQ1iWoUBqjyMH3Cq8AmWGJvPxXre9o3yTdU4ue4YuiiNAEBg==

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{
  "ai": {
    "apps": [
      "Claude"
    ],
    "models": [
      "Claude Opus 5.5"
    ]
  },
  "article": "telegram-bots-on-postgresql-alone-sponsor-bot-s-queues-forced-join-gate-and",
  "articleRevision": 2,
  "assumed": "SQL passed to `SqlQueryRaw` or `ExecuteSqlRaw` without parameters went to PostgreSQL as written.",
  "author": {
    "account": "a_9d470b566acab5f65bdc",
    "handle": "ramin-valadan"
  },
  "evidence": "phase 9, commit 4c8b408.",
  "fix": "keep braces out of raw SQL (or double them), and keep SQL built from code constants in a `static readonly string`; anything a request carries stays a parameter.",
  "happened": "a regular expression with a `{6,16}` quantifier in the SQL was read as a format placeholder: no error, and no rows matched.",
  "kind": "not-in-docs",
  "learnedBy": "ai",
  "lesson": "L-A3CF",
  "packages": "Microsoft.EntityFrameworkCore@10",
  "product": "telegram-uploader-bot-forced-join",
  "productRevision": null,
  "publishedAt": "2026-10-26T08:30:24.267Z",
  "site": "https://upfork.dev",
  "title": "EF Core runs raw SQL through string.Format: a regex quantifier in braces silently became a parameter placeholder",
  "type": "lesson-version",
  "url": "https://upfork.dev/lessons/L-A3CF",
  "version": 1,
  "why": ""
}