CREATE TABLE nga_geometry_index (
  table_name TEXT NOT NULL,
  geom_id INTEGER NOT NULL,
  min_x DOUBLE NOT NULL,
  max_x DOUBLE NOT NULL,
  min_y DOUBLE NOT NULL,
  max_y DOUBLE NOT NULL,
  min_z DOUBLE,
  max_z DOUBLE,
  min_m DOUBLE,
  max_m DOUBLE,
  CONSTRAINT pk_ngi PRIMARY KEY (table_name, geom_id),
  CONSTRAINT fk_ngi_nti_tn FOREIGN KEY (table_name) REFERENCES nga_table_index(table_name)
);