GPKG_DATA_COLUMNS top-level constant Null safety

String const GPKG_DATA_COLUMNS

Implementation

const GPKG_DATA_COLUMNS = """
  CREATE TABLE IF NOT EXISTS $TABLE_DATA_COLUMNS (
    table_name TEXT NOT NULL,
    column_name TEXT NOT NULL,
    name TEXT,
    title TEXT,
    description TEXT,
    mime_type TEXT,
    constraint_name TEXT,
    CONSTRAINT pk_gdc PRIMARY KEY (table_name, column_name),
    CONSTRAINT fk_gdc_tn FOREIGN KEY (table_name) REFERENCES $TABLE_GEOPACKAGE_CONTENTS(table_name)
  );
""";