qwat.public contains 45 columns - click on heading to sort:

Table	Column	Type	Size	Nulls	Auto	Default	Comments
geography_columns	coord_dimension	int4	10	√		null
geography_columns	f_geography_column	name	2147483647	√		null
geography_columns	f_table_catalog	name	2147483647	√		null
geography_columns	f_table_name	name	2147483647	√		null
geography_columns	f_table_schema	name	2147483647	√		null
geography_columns	srid	int4	10	√		null
geography_columns	type	text	2147483647	√		null
geometry_columns	coord_dimension	int4	10	√		null
geometry_columns	f_geometry_column	name	2147483647	√		null
geometry_columns	f_table_catalog	varchar	256	√		null
geometry_columns	f_table_name	name	2147483647	√		null
geometry_columns	f_table_schema	name	2147483647	√		null
geometry_columns	srid	int4	10	√		null
geometry_columns	type	varchar	30	√		null
raster_columns	blocksize_x	int4	10	√		null
raster_columns	blocksize_y	int4	10	√		null
raster_columns	extent	geometry	2147483647	√		null
raster_columns	nodata_values	_float8	17,17	√		null
raster_columns	num_bands	int4	10	√		null
raster_columns	out_db	_bool	1	√		null
raster_columns	pixel_types	_text	2147483647	√		null
raster_columns	r_raster_column	name	2147483647	√		null
raster_columns	r_table_catalog	name	2147483647	√		null
raster_columns	r_table_name	name	2147483647	√		null
raster_columns	r_table_schema	name	2147483647	√		null
raster_columns	regular_blocking	bool	1	√		null
raster_columns	same_alignment	bool	1	√		null
raster_columns	scale_x	float8	17,17	√		null
raster_columns	scale_y	float8	17,17	√		null
raster_columns	spatial_index	bool	1	√		null
raster_columns	srid	int4	10	√		null
raster_overviews	o_raster_column	name	2147483647	√		null
raster_overviews	o_table_catalog	name	2147483647	√		null
raster_overviews	o_table_name	name	2147483647	√		null
raster_overviews	o_table_schema	name	2147483647	√		null
raster_overviews	overview_factor	int4	10	√		null
raster_overviews	r_raster_column	name	2147483647	√		null
raster_overviews	r_table_catalog	name	2147483647	√		null
raster_overviews	r_table_name	name	2147483647	√		null
raster_overviews	r_table_schema	name	2147483647	√		null
spatial_ref_sys	auth_name	varchar	256	√		null
spatial_ref_sys	auth_srid	int4	10	√		null
spatial_ref_sys	proj4text	varchar	2048	√		null
spatial_ref_sys	srid	int4	10
spatial_ref_sys	srtext	varchar	2048	√		null