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_archive/osis/templates/create_table.sql

@@ -0,0 +1,56 @@
+CREATE OR REPLACE FUNCTION create_table_from_json(
+    definition JSONB,
+    reset BOOLEAN DEFAULT FALSE
+) RETURNS VOID AS $$
+DECLARE
+    table_name TEXT;
+    table_fields JSONB;
+    fts_fields TEXT[];
+    columns TEXT := '';
+    create_table_sql TEXT;
+    drop_table_sql TEXT;
+    fts_table_sql TEXT := '';
+    field RECORD;
+BEGIN
+    -- Extract the values from the JSON object
+    table_name := definition->>'table_name';
+    table_fields := definition->'table_fields';
+    fts_fields := ARRAY(SELECT jsonb_array_elements_text(definition->'fts_fields'));
+
+    -- Iterate over the JSONB object to build the columns definition
+    FOR field IN SELECT * FROM jsonb_each_text(table_fields)
+    LOOP
+        columns := columns || field.key || ' ' || field.value || ', ';
+    END LOOP;
+
+    -- Add the necessary columns
+    columns := columns || 'id TEXT PRIMARY KEY, ';
+    columns := columns || 'name TEXT NOT NULL, ';
+    columns := columns || 'creation_date TIMESTAMP DEFAULT CURRENT_TIMESTAMP, ';
+    columns := columns || 'mod_date TIMESTAMP DEFAULT CURRENT_TIMESTAMP, ';
+    columns := columns || 'data JSON';
+
+    -- Construct the CREATE TABLE statement
+    create_table_sql := 'CREATE TABLE IF NOT EXISTS ' || table_name || ' (' || columns || ');';
+
+    -- Conditionally construct the DROP TABLE statement
+    IF reset THEN
+        drop_table_sql := 'DROP TABLE IF EXISTS ' || table_name || ';';
+        create_table_sql := drop_table_sql || create_table_sql;
+    END IF;
+
+    -- Add the FTS table and index if full-text search fields are provided
+    IF array_length(fts_fields, 1) > 0 THEN
+        fts_table_sql := 'CREATE TABLE IF NOT EXISTS ' || table_name || '_fts (' ||
+                         'id TEXT PRIMARY KEY, ' ||
+                         table_name || '_id TEXT REFERENCES ' || table_name || '(id), ' ||
+                         'document tsvector);' ||
+                         'CREATE INDEX IF NOT EXISTS idx_' || table_name || '_fts_document ' ||
+                         'ON ' || table_name || '_fts USING GIN(document);';
+        create_table_sql := create_table_sql || fts_table_sql;
+    END IF;
+
+    -- Execute the dynamic SQL
+    EXECUTE create_table_sql;
+END;
+$$ LANGUAGE plpgsql;