Describe
Version 0.7.1

How to view the schema of the result of a query

In order to view the schema of the result of a query, prepend DESCRIBE to a query.

DESCRIBE SELECT * FROM tbl;

In order to view the schema of a table, use DESCRIBE followed by the table name.

DESCRIBE tbl;

Below is an example of DESCRIBE on the lineitem table of TPC-H.

┌─────────────────┬───────────────┬──────┬──────┬─────────┬───────┐
   column_name     column_type   null  key   default  extra 
├─────────────────┼───────────────┼──────┼──────┼─────────┼───────┤
 l_orderkey       INTEGER        NO    NULL  NULL     NULL  
 l_partkey        INTEGER        NO    NULL  NULL     NULL  
 l_suppkey        INTEGER        NO    NULL  NULL     NULL  
 l_linenumber     INTEGER        NO    NULL  NULL     NULL  
 l_quantity       INTEGER        NO    NULL  NULL     NULL  
 l_extendedprice  DECIMAL(15,2)  NO    NULL  NULL     NULL  
 l_discount       DECIMAL(15,2)  NO    NULL  NULL     NULL  
 l_tax            DECIMAL(15,2)  NO    NULL  NULL     NULL  
 l_returnflag     VARCHAR        NO    NULL  NULL     NULL  
 l_linestatus     VARCHAR        NO    NULL  NULL     NULL  
 l_shipdate       DATE           NO    NULL  NULL     NULL  
 l_commitdate     DATE           NO    NULL  NULL     NULL  
 l_receiptdate    DATE           NO    NULL  NULL     NULL  
 l_shipinstruct   VARCHAR        NO    NULL  NULL     NULL  
 l_shipmode       VARCHAR        NO    NULL  NULL     NULL  
 l_comment        VARCHAR        NO    NULL  NULL     NULL  
└─────────────────┴───────────────┴──────┴──────┴─────────┴───────┘
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