try create a database

initdb.d/26-character.sql

@@ -0,0 +1,29 @@
+CREATE TABLE "character" (
+    "entry"         TEXT NOT NULL PRIMARY KEY,
+    "sub"           TEXT[] NOT NULL,
+    "sup"           TEXT[] NOT NULL,
+    "var"           TEXT[] NOT NULL,
+    "amalgamation"  TEXT[] NOT NULL,
+    "component"     TEXT[] NOT NULL,
+    "visual"        TEXT[] NOT NULL
+);
+
+CREATE INDEX idx_character_search ON "character"
+    USING pgroonga ("entry", "sub", "sup", "var")
+    WITH (tokenizer='TokenUnigram');
+
+CREATE INDEX idx_character_synonyms ON "character"
+    USING pgroonga ("entry" pgroonga_text_term_search_ops_v2)
+    WITH (tokenizer='TokenUnigram');
+
+CREATE OR REPLACE FUNCTION character_expand (TEXT) RETURNS TEXT AS
+$func$
+DECLARE
+    exp TEXT := pgroonga_query_expand('radical',
+                    'entry',
+                    'var',
+                    $1);
+BEGIN
+    RETURN $1||' OR '||exp;
+END;
+$func$ LANGUAGE plpgsql IMMUTABLE;