use separate init.sql that only calls other scripts

pgsql/fload.sql

@@ -1,4 +1,6 @@
 
+-- create load functions
+
 create or replace function get_value(tname text, vtext text) returns bigint as $$
 begin
   case tname

pgsql/fshow.sql

@@ -1,4 +1,6 @@
 
+-- create show functions
+
 create or replace function show_value(type smallint, id bigint) returns text as $$
 declare tname text := (select dtname from datatypes as dt where dt.id = type);
 begin
@@ -10,13 +12,18 @@ create or replace function show_value(tname text, id bigint) returns text as $$
 begin
   case tname
     when 'node' then
-      return (
+      return show_node(id);
-        select ns.prefix || ':' || n.name 
+    else 
-          from nodes n
+      return text(show_value.id);
-          join namespaces ns on ns.id = n.namespace
-          where n.id = show_value.id
-      );
-    else return text(show_value.id);
   end case;
 end;
 $$ language plpgsql;
+
+
+create or replace function show_node(nid bigint) returns text as $$
+  select ns.prefix || ':' || n.name from nodes n
+    join namespaces ns on ns.id = n.namespace
+    where n.id = nid;
+$$ language sql;
+
+

pgsql/init.sql

@@ -1,32 +1,11 @@
 
+-- create tables and views
 \i tcreate.sql
 \i vtriples.sql
 
+-- create functions
 \i fload.sql
 \i fshow.sql
 
-select new_event() as event
-\gset
-
 -- load data
-
+\i lbase.sql
-select load_namespace('http://cyberconcepts.org/cco-common#', 'cco');
-select load_namespace('http://www.w3.org/1999/02/22-rdf-syntax-ns#', 'rdf');
-select load_namespace('http://www.w3.org/2000/01/rdf-schema#', 'rdfs');
-
-select load_datatype('namespace', 'namespaces');
-select load_datatype('node', 'nodes');
-select load_datatype('datatype', 'datatypes');
-select load_datatype('event', 'events');
-select load_datatype('triple', 'triples');
-select load_datatype('text', 'texts');
-select load_datatype('int');
-select load_datatype('decimal');
-select load_datatype('timestamp');
-
--- basic triples: type assignments for 
--- type -> Property; Property, Class -> Class
-
-select load_triple('node', 'rdf:type', 'rdf:type', 'node', 'rdf:Property', :event);
-select load_triple('node', 'rdf:Property', 'rdf:type', 'node', 'rdfs:Class', :event);
-select load_triple('node', 'rdfs:Class', 'rdf:type', 'node', 'rdfs:Class', :event);

pgsql/lbase.sql

@@ -0,0 +1,28 @@
+
+-- load base data
+
+select new_event() as event
+\gset
+
+-- load data
+
+select load_namespace('http://cyberconcepts.org/cco-common#', 'cco');
+select load_namespace('http://www.w3.org/1999/02/22-rdf-syntax-ns#', 'rdf');
+select load_namespace('http://www.w3.org/2000/01/rdf-schema#', 'rdfs');
+
+select load_datatype('namespace', 'namespaces');
+select load_datatype('node', 'nodes');
+select load_datatype('datatype', 'datatypes');
+select load_datatype('event', 'events');
+select load_datatype('triple', 'triples');
+select load_datatype('text', 'texts');
+select load_datatype('int');
+select load_datatype('decimal');
+select load_datatype('timestamp');
+
+-- basic triples: type assignments for 
+-- type -> Property; Property, Class -> Class
+
+select load_triple('node', 'rdf:type', 'rdf:type', 'node', 'rdf:Property', :event);
+select load_triple('node', 'rdf:Property', 'rdf:type', 'node', 'rdfs:Class', :event);
+select load_triple('node', 'rdfs:Class', 'rdf:type', 'node', 'rdfs:Class', :event);

pgsql/tcreate.sql

@@ -1,21 +1,23 @@
--- tables
+
+-- create tables
 
 CREATE TABLE namespaces (
     id serial NOT NULL primary key,
-    iri text NOT NULL,
+    iri text NOT NULL unique,
-    prefix text
+    prefix text unique
 );
 
 CREATE TABLE datatypes (
     id smallserial NOT NULL primary key,
-    dtname text NOT NULL,
+    dtname text NOT NULL unique,
     tablename text
 );
 
 CREATE TABLE nodes (
     id bigserial NOT NULL primary key,
     namespace bigint REFERENCES namespaces,
-    name text
+    name text,
+    unique (namespace, name)
 );
 
 CREATE TABLE events (
@@ -37,7 +39,7 @@ CREATE TABLE triples (
 CREATE TABLE texts (
     id bigserial NOT NULL primary key,
     language bigint REFERENCES nodes,
-    text text NOT NULL
+    text text NOT NULL unique
 );
 
 -- set table owner
@@ -66,3 +68,4 @@ CREATE INDEX idx_po ON triples USING btree (predicate, otype, ovalue);
 CREATE INDEX idx_os ON triples USING btree (otype, ovalue, stype, svalue);
 
 CREATE INDEX fki_language ON texts USING btree (language);
+CREATE INDEX idx_texts ON texts USING btree (text);

pgsql/vtriples.sql

@@ -1,4 +1,6 @@
 
+-- create triples views
+
 create or replace view vtriples as
 select triples.id,
        stype, svalue, show_value(stype, svalue) as stext,