Initial commit with basic DB layout

migrations/2023-01-03-134434_create_word/down.sql

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+-- This file should undo anything in `up.sql`

migrations/2023-01-03-134434_create_word/up.sql

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+-- Your SQL goes here
+CREATE TYPE PartOfSpeech as ENUM ('ADJ', 'ADP', 'ADV', 'AUX', 'CCONJ', 'DET', 'INTJ', 'NOUN', 'NUM', 'PART', 'PRON', 'PROPN', 'PUNCT', 'SCONJ', 'SYM', 'VERB', 'X');
+CREATE TYPE WordRelationship as ENUM('def', 'related');
+
+CREATE TABLE Words (
+  norm VARCHAR(255) PRIMARY KEY, -- normalized word
+  native VARCHAR(255),
+  lemma VARCHAR(255)
+    REFERENCES Words(norm)
+    ON UPDATE CASCADE
+    ON DELETE SET NULL,
+  language VARCHAR(255)
+    REFERENCES Languages(name)
+    ON UPDATE CASCADE
+    ON DELETE CASCADE
+    NOT NULL,
+  partofspeech PartOfSpeech NOT NULL,
+  audio VARCHAR(511),
+  video VARCHAR(511),
+  image VARCHAR(511),
+  description TEXT, -- Markdown
+  etymology TEXT, -- Markdown
+  lusage TEXT, -- Markdown
+  morphology TEXT -- Markdown
+);
+
+CREATE TABLE WordRelation (
+  id SERIAL PRIMARY KEY,
+  wordsource VARCHAR(255)
+    REFERENCES Words(norm)
+    ON UPDATE CASCADE
+    ON DELETE CASCADE
+    NOT NULL,
+  wordtarget VARCHAR(255)
+    REFERENCES Words(norm)
+    ON UPDATE CASCADE
+    ON DELETE CASCADE
+    NOT NULL,
+  relationship WordRelationship NOT NULL
+);