Class: AmazonAthena::Commands::ShowColumns

Inherits:

AmazonAthena::Command

• Object
• AmazonAthena::Command
• AmazonAthena::Commands::ShowColumns

Defined in:

lib/amazon_athena/commands/show_columns.rb

Instance Method Summary

• #initialize(database_table) ⇒ ShowColumns constructor

  A new instance of ShowColumns.

• #run(connection) ⇒ Object
• #statement ⇒ Object

Methods inherited from AmazonAthena::Command

#preview

Constructor Details

#initialize(database_table) ⇒ ShowColumns

Returns a new instance of ShowColumns.

# File 'lib/amazon_athena/commands/show_columns.rb', line 7

def initialize(database_table)
  @database_table = database_table
end

Instance Method Details

#run(connection) ⇒ Object

# File 'lib/amazon_athena/commands/show_columns.rb', line 15

def run(connection)
  connection.query(statement).map {|row| row.field.strip }
end

#statement ⇒ Object

# File 'lib/amazon_athena/commands/show_columns.rb', line 11

def statement
  "SHOW COLUMNS IN #{@database_table};"
end