Table information for 'tap_schema.columns'

General

Table Description: Columns in tables available for ADQL querying.

This table is available for ADQL queries and through the TAP endpoint.

Resource Description: Argentine Virtual Observatory's Table Access Protocol (TAP) service with table metadata.

For a list of all services and tables belonging to this table's resource, see Information on resource '__system__/tap'

Sorted by DB column index. [Sort alphabetically]

Name	Table Head	Description	Unit	UCD
table_name	Table	Fully qualified table name	N/A	N/A
column_name	Name	Column name	N/A	N/A
description	Description	Brief description of column	N/A	N/A
unit	Unit	Unit in VO standard format	N/A	N/A
ucd	UCD	UCD of column if any	N/A	N/A
utype	Utype	Utype of column if any	N/A	N/A
datatype	Type	ADQL datatype	N/A	N/A
arraysize	Arr.	Arraysize in VOTable notation	N/A	N/A
xtype	xtype	VOTable extended type information (for special interpretation of data content, e.g., timestamps or points)	N/A	N/A
"size"	"size"	Legacy length (ignore if you can).	N/A	N/A
principal	Princ?	Is column principal?	N/A	N/A
indexed	Indexed?	Is there an index on this column?	N/A	N/A
std	Std?	Is this a standard column?	N/A	N/A
sourceRD	Sourcerd	Id of the originating rd (local information)	N/A	N/A
column_index	Ind.	1-based index of the column in database order.	N/A	N/A

Columns that are parts of indices are marked like this.

The following services may use the data contained in this table: