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mdl_user_preferences
MIGRATEIdentity / profile / access / user extension · 4 columnsProposed target
Map to users, profiles, external_identity_links, memberships/enrolments as applicable
Migration rule
Preserve Moodle IDs in legacy_id; use immutable IdP subject for login identity
Verification required
Verify PII fields, custom profile semantics, deleted/suspended users, duplicate email and foreign keys
Tracking
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| Column | Type | Null | Default | Target mapping | Risk |
|---|---|---|---|---|---|
| id | bigint | Not null | Preserve as legacy source ID; generate target PK unless target accepts stable legacy key. | High: verify semantics/relationship/security | |
| userid | bigint | Not null | '0' | Resolve to target foreign key via source-ID crosswalk; do not assume numeric IDs match target IDs. | High: verify semantics/relationship/security |
| name | varchar(255) | Not null | '' | Map same-named field where semantics match; confirm target type, nullability, defaults and business meaning. | Schema-only inference |
| value | varchar(1333) | Not null | '' | Map same-named field where semantics match; confirm target type, nullability, defaults and business meaning. | Schema-only inference |