PostgreSQL engine (PGlite) + CodeMirror editor

CHANGELOG.md

@@ -1,5 +1,8 @@
 # Changelog
 
+## 2026-06-14 - PostgreSQL engine
+You can now choose between SQLite and PostgreSQL in the menu above the schema. PostgreSQL gives proper data types. The editor also gained autocomplete for table and column names.
+
 ## 2026-06-14 - Relational algebra mode
 You can now answer questions with relational algebra instead of SQL. Use the SQL/RA toggle to switch. Expressions are converted to SQL and run the same way, and the generated SQL is shown for reference.
 

data/oracle-types.ts

@@ -94,6 +94,17 @@ export interface OracleQuestion {
    * these alternatives are only used for validation.
    */
   alternativeQueries?: string[];
+  /**
+   * PostgreSQL-specific reference query, using the same placeholder format.
+   * Used instead of `query` when generating for a PostgreSQL-engine language.
+   * Only needed when the query differs from the SQLite version (e.g. EXTRACT vs YEAR).
+   */
+  pgQuery?: string;
+  /**
+   * PostgreSQL-specific alternative queries.
+   * Falls back to `alternativeQueries` if not provided.
+   */
+  pgAlternativeQueries?: string[];
 }
 
 export interface OracleData {

languages/de.ts

@@ -427,40 +427,47 @@ const de: LanguageDefinition = {
       "Warnung: Diese Speicherdatei wurde in einer anderen Sprache erstellt ({{fileLang}}). Der Import kann zu Problemen führen..",
     viewLabel: "View",
     changelog: "Änderungsprotokoll",
-    modeSQL: "SQL",
-    modeRA: "Relationale Algebra",
-    generatedSQL: "Generiertes SQL",
-    raParseError: "Fehler in relationaler Algebra: {{message}}",
-    raPlaceholder: "-- Schreibe einen Ausdruck der relationalen Algebra\n-- Klicke auf 'RA-Referenz' für die Syntax",
-    raReference: "Referenz relationale Algebra",
-    raUnaryOps: "Unäre Operatoren",
-    raBinaryOps: "Binäre Operatoren",
-    raColOp: "Operator",
-    raColSyntax: "Syntax",
-    raColDesc: "Beschreibung",
-    raDescSelection: "Selektion — Zeilen filtern",
-    raDescProjection: "Projektion — Spalten auswählen",
-    raDescRename: "Spalten umbenennen",
-    raDescGroup: "Gruppierung mit Aggregaten",
-    raDescSort: "Sortierung",
-    raDescDistinct: "Duplikate entfernen",
-    raDescCross: "Kreuzprodukt",
-    raDescNatJoin: "Natürlicher Join",
-    raDescThetaJoin: "Theta-Join (bedingt)",
-    raDescUnion: "Vereinigung",
-    raDescIntersect: "Schnittmenge",
-    raDescMinus: "Differenz",
-    raDescDivide: "Division",
-    raNotation: "Notationsstile",
-    raNoteBrackets: "— eckige Klammern",
-    raNoteCurly: "— geschweifte Klammern",
-    raNoteLaTeX: "— LaTeX-Stil",
-    raNoteImplicit: "— ohne Klammern",
-    raNoteChain: "— Verkettung ohne ()",
-    raAssignment: "Zuweisung",
-    raNoteAssignment: "Die letzte Zuweisung wird automatisch zurückgegeben",
-    raConditions: "Bedingungen",
-    raNoteComparison: "Vergleichsoperatoren: = <> < > <= >=",
+    modeSQL: "SQL",
+    modeRA: "Relationale Algebra",
+    generatedSQL: "Generiertes SQL",
+    raParseError: "Fehler in relationaler Algebra: {{message}}",
+    engineLoadFailed: "Die PostgreSQL-Engine konnte nicht geladen werden. Wechsel zurück zu SQLite.",
+    raPlaceholder: "-- Schreibe einen Ausdruck der relationalen Algebra\n-- Klicke auf 'RA-Referenz' für die Syntax",
+    raReference: "Referenz relationale Algebra",
+    raUnaryOps: "Unäre Operatoren",
+    raBinaryOps: "Binäre Operatoren",
+    raColOp: "Operator",
+    raColSyntax: "Syntax",
+    raColDesc: "Beschreibung",
+    raDescSelection: "Selektion — Zeilen filtern",
+    raDescProjection: "Projektion — Spalten auswählen",
+    raDescRename: "Spalten umbenennen",
+    raDescGroup: "Gruppierung mit Aggregaten",
+    raDescSort: "Sortierung",
+    raDescDistinct: "Duplikate entfernen",
+    raDescCross: "Kreuzprodukt",
+    raDescNatJoin: "Natürlicher Join",
+    raDescThetaJoin: "Theta-Join (bedingt)",
+    raDescUnion: "Vereinigung",
+    raDescIntersect: "Schnittmenge",
+    raDescMinus: "Differenz",
+    raDescDivide: "Division",
+    raNotation: "Notationsstile",
+    raNoteBrackets: "— eckige Klammern",
+    raNoteCurly: "— geschweifte Klammern",
+    raNoteLaTeX: "— LaTeX-Stil",
+    raNoteImplicit: "— ohne Klammern",
+    raNoteChain: "— Verkettung ohne ()",
+    raAssignment: "Zuweisung",
+    raNoteAssignment: "Die letzte Zuweisung wird automatisch zurückgegeben",
+    raConditions: "Bedingungen",
+    raNoteComparison: "Vergleichsoperatoren: = <> < > <= >=",
+    editorSettings: "Editor-Einstellungen",
+    settingAutocomplete: "Autovervollständigung",
+    settingLineNumbers: "Zeilennummern",
+    settingHighlightActiveLine: "Aktive Zeile hervorheben",
+    sqlReferencePostgresql: "PostgreSQL-Dokumentation",
+    engineMismatchWarning: "Warnung: Diese Speicherdatei wurde mit einer anderen Datenbank-Engine erstellt ({{fileEngine}}). Der Import kann zu Problemen führen.",
   },
 };
 

languages/en.ts

@@ -431,6 +431,7 @@ const en: LanguageDefinition = {
     modeRA: "Relational Algebra",
     generatedSQL: "Generated SQL",
     raParseError: "Relational algebra error: {{message}}",
+    engineLoadFailed: "Failed to load the PostgreSQL engine. Falling back to SQLite.",
     raPlaceholder: "-- Write a relational algebra expression\n-- Click 'RA Reference' for syntax",
     raReference: "Relational Algebra Reference",
     raUnaryOps: "Unary Operators",
@@ -461,6 +462,12 @@ const en: LanguageDefinition = {
     raNoteAssignment: "Last assignment is returned automatically",
     raConditions: "Conditions",
     raNoteComparison: "Comparison operators: = <> < > <= >=",
+    editorSettings: "Editor Settings",
+    settingAutocomplete: "Autocomplete",
+    settingLineNumbers: "Line Numbers",
+    settingHighlightActiveLine: "Highlight Active Line",
+    sqlReferencePostgresql: "PostgreSQL Documentation",
+    engineMismatchWarning: "Warning: This save file was created with a different database engine ({{fileEngine}}). Importing may cause issues.",
   },
 };
 

languages/sv-pg.ts

@@ -0,0 +1,11 @@
+import { LanguageDefinition } from "./types";
+import sv from "./sv";
+
+const svPg: LanguageDefinition = {
+  ...sv,
+  code: "sv-pg",
+  displayName: "Svenska (PostgreSQL)",
+  engine: "postgresql",
+};
+
+export default svPg;

languages/sv.ts

@@ -431,6 +431,7 @@ const sv: LanguageDefinition = {
     modeRA: "Relationsalgebra",
     generatedSQL: "Genererad SQL",
     raParseError: "Relationsalgebra-fel: {{message}}",
+    engineLoadFailed: "Kunde inte ladda PostgreSQL-motorn. Återgår till SQLite.",
     raPlaceholder: "-- Skriv ett relationsalgebrauttryck\n-- Klicka på 'RA-referens' för syntax",
     raReference: "Relationsalgebrareferens",
     raUnaryOps: "Unära operatorer",
@@ -461,6 +462,12 @@ const sv: LanguageDefinition = {
     raNoteAssignment: "Sista tilldelningen returneras automatiskt",
     raConditions: "Villkor",
     raNoteComparison: "Jämförelseoperatorer: = <> < > <= >=",
+    editorSettings: "Editorinställningar",
+    settingAutocomplete: "Autokomplettering",
+    settingLineNumbers: "Radnummer",
+    settingHighlightActiveLine: "Markera aktiv rad",
+    sqlReferencePostgresql: "PostgreSQL-dokumentation",
+    engineMismatchWarning: "Varning: Denna sparfil skapades med en annan databasmotor ({{fileEngine}}). Import kan orsaka problem.",
   },
 };
 

languages/types.ts

@@ -39,6 +39,8 @@ export interface LanguageDefinition {
   code: string;
   /** Display name in the language itself, e.g. "Svenska", "English" */
   displayName: string;
+  /** Database engine: "sqlite" (default) or "postgresql" */
+  engine?: "sqlite" | "postgresql";
 
   // ── Data: Names ──────────────────────────────────────────────
   /** First names pool (min 15, indexed by canonical person slot) */