Rewrite SQLite-only functions in D1 CHECK constraints

[no-itsbackpack]

Problem

pscale import d1 copies SQLite CHECK / GENERATED expressions into Postgres DDL after requoting identifiers, but it left SQLite function names unchanged. Schema apply then fails with errors like:

ERROR: function json_valid(text) does not exist

That shows up on Drizzle JSON columns (CHECK (json_valid("row_json"))) and any other dump that uses SQLite-only builtins.

Fix

convertCheckExpr now rewrites SQLite-only functions and a few operators to Postgres:

• json_valid(x) → (x) IS JSON
• ifnull → coalesce, iif → CASE, instr → strpos
• json_extract with a literal $.path → jsonb #>>
• hex / unhex / quote / typeof / char / unicode
• likely / unlikely / likelihood (no-ops)
• datetime / unixepoch / strftime / julianday when they already have a DEFAULT mapping
• GLOB / REGEXP against a string literal, and == → =

Functions we cannot translate (printf, json_set, non-literal GLOB, …) stay in the expression and lint reports SQLITE_FUNCTION as an error so import fails early with a remediation instead of a raw psql error.

Tests

Unit and convert-pipeline coverage for the mappings above, including the Drizzle json_valid CHECK shape. assertValidPostgresDDL runs when a local Postgres is reachable.

Slack Thread

  

[cursor]

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