PSQLQueryTool Glossary

Contents: Description, Procedure Description In order to make the most of the MSFF PSQL Mars database, you must be familiar with the schema and table layout of the database. The examples, provided here allow you to access the descriptions of the tables and columns available for you to use in your queries. There are two sources for this information in the reference schema: reference.pubmars_glossary This is a VIEW based on joining several of the postgres control tables which define the actual Mars data tables; this includes tables in the public schema. Field descriptions will be null, if the table author did not populate a descriptive comment about the column. Suggested selection-list fields: schema_name, table_name, column_name, datatype_name, description reference.glossary This is a hand-updated table describing all of the tables under the control of THEMIS Mission-Operations; the descriptions provided here may be more verbose than those in the pubmars_glossary Suggested selection-list fields: table_name, field_name, value_type, description Suggested constraints: schema_name='thmpub' The examples provided below are intended to get you started; however, you should refine the constraints-list and the order-by-list according to your needs. Procedure Use the following commands in each of the following examples Write the query; for more information see Writing PSQL-DB Queries Access the PSQLQueryTool from Davinci; see the function page for a complete description of all available options Read in the results using one of the two options shown here: "read_lines" is better for queries that return fewer lines "copy" is better for queries that return hundreds of lines or verbose fields dv>query="select table_name, field_name, description from glossary where schema_name='thmpub' order by table_name, field_name;" dv>url=themis3db(query,psql=1,header=1) Using PSQL password from: /themis/lib/dav_lib/dbpass/THM_DB_USER_davinci Read TEXT file: 1 lines make this a link! http... dv>gloss=read_lines(url) Downloading.done. Read TEXT file: 0 lines Text Buffer with 0 lines of text --OR-- dv>copy(url,$TMPDIR) Downloading.done. [path to file repeated to screen] Example-1: Get a list of available tables dv> commands here dv results ... Example-2: Explore the columns available in a single table dv> commands here dv results ... Example-3: Search for available columns related to the concept of "temperature" dv> commands here dv results ...

DavinciWiki Mini-Nav Bar Contents Functions Function Categories Common Procedures Glossary Download Davinci Change Log News Mailing List Contact Developers davinci-dev [AT] mars.asu.edu All other topics See navigation on the left Functions Used copy read_lines themis3db Related Procedures Writing PSQL-DB Queries