4. Alter table¶

4.1. Synopsis¶

 ALTER TABLE { <entries> | <find_expression> } [, ... ] ADD
   { <column_name> <data_type> }
   [, ... ]

find_expression ::=
  FIND ( { <tag_expression> | NOT <tag_expression> } [ AND ... ] )

tag_expression ::=
  TAG = 'tag_name'

4.2. Description¶

ALTER TABLE will modify one or more tables in a QuasarDB cluster by adding columns with the specified schema. The statement is transactional.

4.3. Parameters¶

table_name: The name of the table to be modified. Can be alphanumeric, but is not allowed to start with a number.
find_expression: When your tables are tagged, you can use inline key/value lookups to perform your query over multiple tables. To match all tables that have the tag “stocks”, you can use FIND(tag='stocks' AND type=ts).
column_name: The name of a column to be added to the table. Can be alphanumeric, but is not allowed to start with a number.
data_type: The data type to be associated with the column. Can be any of INT64, DOUBLE, BLOB or TIMESTAMP.

4.4. Examples¶

Add a single column to an existing table:

ALTER TABLE example ADD my_int INT64

Add multiple columns to an existing table:

ALTER TABLE example ADD my_int INT64, my_double DOUBLE, my_blob BLOB, my_ts TIMESTAMP

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