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# File 'lib/blazer/adapters/athena_adapter.rb', line 4
def run_statement(statement, , bind_params = [])
require "digest/md5"
columns = []
rows = []
error = nil
begin
if !bind_params.empty?
request_token = Digest::MD5.hexdigest([statement, bind_params.to_json, data_source.id, settings["workgroup"]].compact.join("/"))
statement_name = "blazer_#{request_token}"
begin
client.create_prepared_statement({
statement_name: statement_name,
work_group: settings["workgroup"],
query_statement: statement
})
rescue Aws::Athena::Errors::InvalidRequestException => e
raise e unless e.message.include?("already exists in WorkGroup")
end
using_statement = bind_params.map { |v| data_source.quote(v) }.join(", ")
statement = "EXECUTE #{statement_name} USING #{using_statement}"
else
request_token = Digest::MD5.hexdigest([statement, data_source.id, settings["workgroup"]].compact.join("/"))
end
query_options = {
query_string: statement,
client_request_token: request_token,
query_execution_context: {
database: database,
}
}
if settings["output_location"]
query_options[:result_configuration] = {output_location: settings["output_location"]}
end
if settings["workgroup"]
query_options[:work_group] = settings["workgroup"]
end
resp = client.start_query_execution(**query_options)
query_execution_id = resp.query_execution_id
timeout = data_source.timeout || 300
stop_at = Time.now + timeout
resp = nil
begin
resp = client.get_query_results(
query_execution_id: query_execution_id
)
rescue Aws::Athena::Errors::InvalidRequestException => e
unless e.message.start_with?("Query has not yet finished.")
raise e
end
if Time.now < stop_at
sleep(3)
retry
end
end
if resp && resp.result_set
column_info = resp.result_set.result_set_metadata.column_info
columns = column_info.map(&:name)
column_types = column_info.map(&:type)
untyped_rows = []
resp.each do |page|
untyped_rows.concat page.result_set.rows.map { |r| r.data.map(&:var_char_value) }
end
utc = ActiveSupport::TimeZone['Etc/UTC']
rows = untyped_rows[1..-1] || []
rows = untyped_rows[0..-1] unless column_info.present?
column_types.each_with_index do |ct, i|
case ct
when "timestamp", "timestamp with time zone"
rows.each do |row|
row[i] &&= utc.parse(row[i])
end
when "date"
rows.each do |row|
row[i] &&= Date.parse(row[i])
end
when "bigint"
rows.each do |row|
row[i] &&= row[i].to_i
end
when "double"
rows.each do |row|
row[i] &&= row[i].to_f
end
end
end
elsif resp
error = fetch_error(query_execution_id)
else
error = Blazer::TIMEOUT_MESSAGE
end
rescue Aws::Athena::Errors::InvalidRequestException => e
error = e.message
if error == "Query did not finish successfully. Final query state: FAILED"
error = fetch_error(query_execution_id)
end
end
[columns, rows, error]
end
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