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spanner_samples.rb
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spanner_samples.rb
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# Copyright 2017 Google, Inc
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
def create_instance project_id:, instance_id:
# [START spanner_create_instance]
# project_id = "Your Google Cloud project ID"
# instance_id = "Your Spanner instance ID"
require "google/cloud/spanner"
require "google/cloud/spanner/admin/instance"
instance_admin_client = Google::Cloud::Spanner::Admin::Instance.instance_admin
project_path = instance_admin_client.project_path project: project_id
instance_path = instance_admin_client.instance_path project: project_id, instance: instance_id
instance_config_path = instance_admin_client.instance_config_path project: project_id, instance_config: "regional-us-central1"
job = instance_admin_client.create_instance parent: project_path,
instance_id: instance_id,
instance: { name: instance_path,
config: instance_config_path,
display_name: instance_id,
node_count: 2,
labels: { cloud_spanner_samples: "true" } }
puts "Waiting for create instance operation to complete"
job.wait_until_done!
if job.error?
puts job.error
else
puts "Created instance #{instance_id}"
end
# [END spanner_create_instance]
end
def create_instance_with_processing_units project_id:, instance_id:
# [START spanner_create_instance_with_processing_units]
# project_id = "Your Google Cloud project ID"
# instance_id = "Your Spanner instance ID"
require "google/cloud/spanner"
require "google/cloud/spanner/admin/instance"
instance_admin_client = Google::Cloud::Spanner::Admin::Instance.instance_admin
project_path = instance_admin_client.project_path project: project_id
instance_path = instance_admin_client.instance_path project: project_id, instance: instance_id
instance_config_path = instance_admin_client.instance_config_path project: project_id, instance_config: "regional-us-central1"
job = instance_admin_client.create_instance parent: project_path,
instance_id: instance_id,
instance: { name: instance_path,
config: instance_config_path,
display_name: instance_id,
processing_units: 500,
labels: { cloud_spanner_samples: "true" } }
puts "Waiting for creating instance operation to complete"
job.wait_until_done!
if job.error?
puts job.error
else
puts "Created instance #{instance_id}"
end
instance = instance_admin_client.get_instance name: instance_path
puts "Instance #{instance_id} has #{instance.processing_units} processing units."
# [END spanner_create_instance_with_processing_units]
end
def create_database project_id:, instance_id:, database_id:
# [START spanner_create_database]
# project_id = "Your Google Cloud project ID"
# instance_id = "Your Spanner instance ID"
# database_id = "Your Spanner database ID"
require "google/cloud/spanner"
require "google/cloud/spanner/admin/database"
database_admin_client = Google::Cloud::Spanner::Admin::Database.database_admin
instance_path = database_admin_client.instance_path project: project_id, instance: instance_id
job = database_admin_client.create_database parent: instance_path,
create_statement: "CREATE DATABASE `#{database_id}`",
extra_statements: [
"CREATE TABLE Singers (
SingerId INT64 NOT NULL,
FirstName STRING(1024),
LastName STRING(1024),
SingerInfo BYTES(MAX)
) PRIMARY KEY (SingerId)",
"CREATE TABLE Albums (
SingerId INT64 NOT NULL,
AlbumId INT64 NOT NULL,
AlbumTitle STRING(MAX)
) PRIMARY KEY (SingerId, AlbumId),
INTERLEAVE IN PARENT Singers ON DELETE CASCADE"
]
puts "Waiting for create database operation to complete"
job.wait_until_done!
puts "Created database #{database_id} on instance #{instance_id}"
# [END spanner_create_database]
end
def create_database_with_version_retention_period project_id:, instance_id:, database_id:
# [START spanner_create_database_with_version_retention_period]
# project_id = "Your Google Cloud project ID"
# instance_id = "Your Spanner instance ID"
# database_id = "Your Spanner database ID"
require "google/cloud/spanner"
require "google/cloud/spanner/admin/database"
database_admin_client = Google::Cloud::Spanner::Admin::Database.database_admin
instance_path = database_admin_client.instance_path project: project_id, instance: instance_id
version_retention_period = "7d"
db_path = database_admin_client.database_path project: project_id,
instance: instance_id,
database: database_id
job = database_admin_client.create_database parent: instance_path,
create_statement: "CREATE DATABASE `#{database_id}`",
extra_statements: [
"CREATE TABLE Singers (
SingerId INT64 NOT NULL,
FirstName STRING(1024),
LastName STRING(1024),
SingerInfo BYTES(MAX)
) PRIMARY KEY (SingerId)",
"CREATE TABLE Albums (
SingerId INT64 NOT NULL,
AlbumId INT64 NOT NULL,
AlbumTitle STRING(MAX)
) PRIMARY KEY (SingerId, AlbumId),
INTERLEAVE IN PARENT Singers ON DELETE CASCADE",
"ALTER DATABASE `#{database_id}`
SET OPTIONS ( version_retention_period = '#{version_retention_period}' )"
]
puts "Waiting for create database operation to complete"
job.wait_until_done!
database = database_admin_client.get_database name: db_path
puts "Created database #{database_id} on instance #{instance_id}"
puts "\tVersion retention period: #{database.version_retention_period}"
puts "\tEarliest version time: #{database.earliest_version_time}"
# [END spanner_create_database_with_version_retention_period]
end
def create_database_with_encryption_key project_id:, instance_id:, database_id:, kms_key_name:
# [START spanner_create_database_with_encryption_key]
# project_id = "Your Google Cloud project ID"
# instance_id = "Your Spanner instance ID"
# database_id = "Your Spanner database ID"
# kms_key_name = "Database eencryption KMS key"
require "google/cloud/spanner"
require "google/cloud/spanner/admin/database"
database_admin_client = Google::Cloud::Spanner::Admin::Database.database_admin
instance_path = database_admin_client.instance_path project: project_id, instance: instance_id
db_path = database_admin_client.database_path project: project_id,
instance: instance_id,
database: database_id
job = database_admin_client.create_database parent: instance_path,
create_statement: "CREATE DATABASE `#{database_id}`",
extra_statements: [
"CREATE TABLE Singers (
SingerId INT64 NOT NULL,
FirstName STRING(1024),
LastName STRING(1024),
SingerInfo BYTES(MAX)
) PRIMARY KEY (SingerId)",
"CREATE TABLE Albums (
SingerId INT64 NOT NULL,
AlbumId INT64 NOT NULL,
AlbumTitle STRING(MAX)
) PRIMARY KEY (SingerId, AlbumId),
INTERLEAVE IN PARENT Singers ON DELETE CASCADE"
],
encryption_config: { kms_key_name: kms_key_name }
puts "Waiting for create database operation to complete"
job.wait_until_done!
database = database_admin_client.get_database name: db_path
puts "Database #{database_id} created with encryption key #{database.encryption_config.kms_key_name}"
# [END spanner_create_database_with_encryption_key]
end
def create_dml_database project_id:, instance_id:, database_id:
require "google/cloud/spanner"
require "google/cloud/spanner/admin/database"
database_admin_client = Google::Cloud::Spanner::Admin::Database.database_admin
instance_path = database_admin_client.instance_path project: project_id, instance: instance_id
job = database_admin_client.create_database parent: instance_path,
create_statement: "CREATE DATABASE `#{database_id}`",
extra_statements: [
"CREATE TABLE Singers (
SingerId INT64 NOT NULL,
FirstName STRING(1024),
LastName STRING(1024),
SingerInfo BYTES(MAX),
FullName STRING(2048) AS (ARRAY_TO_STRING([FirstName, LastName], \" \")) STORED
) PRIMARY KEY (SingerId)",
"CREATE TABLE Albums (
SingerId INT64 NOT NULL,
AlbumId INT64 NOT NULL,
AlbumTitle STRING(MAX),
MarketingBudget INT64
) PRIMARY KEY (SingerId, AlbumId),
INTERLEAVE IN PARENT Singers ON DELETE CASCADE"
]
puts "Waiting for create database operation to complete"
job.wait_until_done!
puts "Created database #{database_id} on instance #{instance_id}"
end
def create_table_with_timestamp_column project_id:, instance_id:, database_id:
# [START spanner_create_table_with_timestamp_column]
# project_id = "Your Google Cloud project ID"
# instance_id = "Your Spanner instance ID"
# database_id = "Your Spanner database ID"
require "google/cloud/spanner"
require "google/cloud/spanner/admin/database"
database_admin_client = Google::Cloud::Spanner::Admin::Database.database_admin
db_path = database_admin_client.database_path project: project_id,
instance: instance_id,
database: database_id
job = database_admin_client.update_database_ddl database: db_path,
statements: [
"CREATE TABLE Performances (
SingerId INT64 NOT NULL,
VenueId INT64 NOT NULL,
EventDate Date,
Revenue INT64,
LastUpdateTime TIMESTAMP NOT NULL OPTIONS (allow_commit_timestamp=true)
) PRIMARY KEY (SingerId, VenueId, EventDate),
INTERLEAVE IN PARENT Singers ON DELETE CASCADE"
]
puts "Waiting for update database operation to complete"
job.wait_until_done!
puts "Created table Performances in #{database_id}"
# [END spanner_create_table_with_timestamp_column]
end
def insert_data project_id:, instance_id:, database_id:
# [START spanner_insert_data]
# project_id = "Your Google Cloud project ID"
# instance_id = "Your Spanner instance ID"
# database_id = "Your Spanner database ID"
require "google/cloud/spanner"
spanner = Google::Cloud::Spanner.new project: project_id
client = spanner.client instance_id, database_id
client.commit do |c|
c.insert "Singers", [
{ SingerId: 1, FirstName: "Marc", LastName: "Richards" },
{ SingerId: 2, FirstName: "Catalina", LastName: "Smith" },
{ SingerId: 3, FirstName: "Alice", LastName: "Trentor" },
{ SingerId: 4, FirstName: "Lea", LastName: "Martin" },
{ SingerId: 5, FirstName: "David", LastName: "Lomond" }
]
c.insert "Albums", [
{ SingerId: 1, AlbumId: 1, AlbumTitle: "Total Junk" },
{ SingerId: 1, AlbumId: 2, AlbumTitle: "Go, Go, Go" },
{ SingerId: 2, AlbumId: 1, AlbumTitle: "Green" },
{ SingerId: 2, AlbumId: 2, AlbumTitle: "Forever Hold Your Peace" },
{ SingerId: 2, AlbumId: 3, AlbumTitle: "Terrified" }
]
end
puts "Inserted data"
# [END spanner_insert_data]
end
def insert_dml_data project_id:, instance_id:, database_id:
require "google/cloud/spanner"
spanner = Google::Cloud::Spanner.new project: project_id
client = spanner.client instance_id, database_id
client.commit do |c|
c.insert "Singers", [
{ SingerId: 1, FirstName: "Marc", LastName: "Richards" },
{ SingerId: 2, FirstName: "Catalina", LastName: "Smith" },
{ SingerId: 3, FirstName: "Alice", LastName: "Trentor" },
{ SingerId: 4, FirstName: "Lea", LastName: "Martin" },
{ SingerId: 5, FirstName: "David", LastName: "Lomond" }
]
c.insert "Albums", [
{ SingerId: 1, AlbumId: 1, AlbumTitle: "Total Junk", MarketingBudget: 20_000 },
{ SingerId: 1, AlbumId: 2, AlbumTitle: "Go, Go, Go", MarketingBudget: 20_000 },
{ SingerId: 2, AlbumId: 1, AlbumTitle: "Green", MarketingBudget: 20_000 },
{ SingerId: 2, AlbumId: 2, AlbumTitle: "Forever Hold Your Peace", MarketingBudget: 20_000 },
{ SingerId: 2, AlbumId: 3, AlbumTitle: "Terrified", MarketingBudget: 20_000 }
]
end
puts "Inserted data"
end
def insert_data_with_timestamp_column project_id:, instance_id:, database_id:
# [START spanner_insert_data_with_timestamp_column]
# project_id = "Your Google Cloud project ID"
# instance_id = "Your Spanner instance ID"
# database_id = "Your Spanner database ID"
require "google/cloud/spanner"
spanner = Google::Cloud::Spanner.new project: project_id
client = spanner.client instance_id, database_id
# Get commit_timestamp
commit_timestamp = client.commit_timestamp
client.commit do |c|
c.insert "Performances", [
{ SingerId: 1, VenueId: 4, EventDate: "2017-10-05", Revenue: 11_000, LastUpdateTime: commit_timestamp },
{ SingerId: 1, VenueId: 19, EventDate: "2017-11-02", Revenue: 15_000, LastUpdateTime: commit_timestamp },
{ SingerId: 2, VenueId: 42, EventDate: "2017-12-23", Revenue: 7000, LastUpdateTime: commit_timestamp }
]
end
puts "Inserted data"
# [END spanner_insert_data_with_timestamp_column]
end
def query_data project_id:, instance_id:, database_id:
# [START spanner_query_data]
# project_id = "Your Google Cloud project ID"
# instance_id = "Your Spanner instance ID"
# database_id = "Your Spanner database ID"
require "google/cloud/spanner"
spanner = Google::Cloud::Spanner.new project: project_id
client = spanner.client instance_id, database_id
client.execute("SELECT SingerId, AlbumId, AlbumTitle FROM Albums").rows.each do |row|
puts "#{row[:SingerId]} #{row[:AlbumId]} #{row[:AlbumTitle]}"
end
# [END spanner_query_data]
end
def query_data_with_timestamp_column project_id:, instance_id:, database_id:
# [START spanner_query_data_with_timestamp_column]
# project_id = "Your Google Cloud project ID"
# instance_id = "Your Spanner instance ID"
# database_id = "Your Spanner database ID"
require "google/cloud/spanner"
spanner = Google::Cloud::Spanner.new project: project_id
client = spanner.client instance_id, database_id
client.execute("SELECT SingerId, AlbumId, MarketingBudget, LastUpdateTime
FROM Albums ORDER BY LastUpdateTime DESC").rows.each do |row|
puts "#{row[:SingerId]} #{row[:AlbumId]} #{row[:MarketingBudget]} #{row[:LastUpdateTime]}"
end
# [END spanner_query_data_with_timestamp_column]
end
def read_data project_id:, instance_id:, database_id:
# [START spanner_read_data]
# project_id = "Your Google Cloud project ID"
# instance_id = "Your Spanner instance ID"
# database_id = "Your Spanner database ID"
require "google/cloud/spanner"
spanner = Google::Cloud::Spanner.new project: project_id
client = spanner.client instance_id, database_id
client.read("Albums", [:SingerId, :AlbumId, :AlbumTitle]).rows.each do |row|
puts "#{row[:SingerId]} #{row[:AlbumId]} #{row[:AlbumTitle]}"
end
# [END spanner_read_data]
end
def delete_data project_id:, instance_id:, database_id:
# [START spanner_delete_data]
# project_id = "Your Google Cloud project ID"
# instance_id = "Your Spanner instance ID"
# database_id = "Your Spanner database ID"
require "google/cloud/spanner"
spanner = Google::Cloud::Spanner.new project: project_id
client = spanner.client instance_id, database_id
# Delete individual rows
client.delete "Albums", [[2, 1], [2, 3]]
# Delete a range of rows where the column key is >=3 and <5
key_range = client.range 3, 5, exclude_end: true
client.delete "Singers", key_range
# Delete remaining Singers rows, which will also delete the remaining
# Albums rows because Albums was defined with ON DELETE CASCADE
client.delete "Singers"
# [END spanner_delete_data]
end
def read_stale_data project_id:, instance_id:, database_id:
# [START spanner_read_stale_data]
# project_id = "Your Google Cloud project ID"
# instance_id = "Your Spanner instance ID"
# database_id = "Your Spanner database ID"
require "google/cloud/spanner"
spanner = Google::Cloud::Spanner.new project: project_id
client = spanner.client instance_id, database_id
# Perform a read with a data staleness of 15 seconds
client.snapshot staleness: 15 do |snapshot|
snapshot.read("Albums", [:SingerId, :AlbumId, :AlbumTitle]).rows.each do |row|
puts "#{row[:SingerId]} #{row[:AlbumId]} #{row[:AlbumTitle]}"
end
end
# [END spanner_read_stale_data]
end
def create_index project_id:, instance_id:, database_id:
# [START spanner_create_index]
# project_id = "Your Google Cloud project ID"
# instance_id = "Your Spanner instance ID"
# database_id = "Your Spanner database ID"
require "google/cloud/spanner"
require "google/cloud/spanner/admin/database"
database_admin_client = Google::Cloud::Spanner::Admin::Database.database_admin
db_path = database_admin_client.database_path project: project_id,
instance: instance_id,
database: database_id
job = database_admin_client.update_database_ddl database: db_path,
statements: [
"CREATE INDEX AlbumsByAlbumTitle ON Albums(AlbumTitle)"
]
puts "Waiting for database update to complete"
job.wait_until_done!
puts "Added the AlbumsByAlbumTitle index"
# [END spanner_create_index]
end
def create_storing_index project_id:, instance_id:, database_id:
# [START spanner_create_storing_index]
# project_id = "Your Google Cloud project ID"
# instance_id = "Your Spanner instance ID"
# database_id = "Your Spanner database ID"
require "google/cloud/spanner"
require "google/cloud/spanner/admin/database"
database_admin_client = Google::Cloud::Spanner::Admin::Database.database_admin
db_path = database_admin_client.database_path project: project_id,
instance: instance_id,
database: database_id
job = database_admin_client.update_database_ddl database: db_path,
statements: [
"CREATE INDEX AlbumsByAlbumTitle2 ON Albums(AlbumTitle)
STORING (MarketingBudget)"
]
puts "Waiting for database update to complete"
job.wait_until_done!
puts "Added the AlbumsByAlbumTitle2 storing index"
# [END spanner_create_storing_index]
end
def add_column project_id:, instance_id:, database_id:
# [START spanner_add_column]
# project_id = "Your Google Cloud project ID"
# instance_id = "Your Spanner instance ID"
# database_id = "Your Spanner database ID"
require "google/cloud/spanner"
require "google/cloud/spanner/admin/database"
database_admin_client = Google::Cloud::Spanner::Admin::Database.database_admin
db_path = database_admin_client.database_path project: project_id,
instance: instance_id,
database: database_id
job = database_admin_client.update_database_ddl database: db_path,
statements: [
"ALTER TABLE Albums ADD COLUMN MarketingBudget INT64"
]
puts "Waiting for database update to complete"
job.wait_until_done!
puts "Added the MarketingBudget column"
# [END spanner_add_column]
end
def add_timestamp_column project_id:, instance_id:, database_id:
# [START spanner_add_timestamp_column]
# project_id = "Your Google Cloud project ID"
# instance_id = "Your Spanner instance ID"
# database_id = "Your Spanner database ID"
require "google/cloud/spanner"
require "google/cloud/spanner/admin/database"
database_admin_client = Google::Cloud::Spanner::Admin::Database.database_admin
db_path = database_admin_client.database_path project: project_id,
instance: instance_id,
database: database_id
job = database_admin_client.update_database_ddl database: db_path,
statements: [
"ALTER TABLE Albums ADD COLUMN LastUpdateTime TIMESTAMP
OPTIONS (allow_commit_timestamp=true)"
]
puts "Waiting for database update to complete"
job.wait_until_done!
puts "Added the LastUpdateTime as a commit timestamp column in Albums table"
# [END spanner_add_timestamp_column]
end
def add_numeric_column project_id:, instance_id:, database_id:
# [START spanner_add_numeric_column]
# project_id = "Your Google Cloud project ID"
# instance_id = "Your Spanner instance ID"
# database_id = "Your Spanner database ID"
require "google/cloud/spanner"
require "google/cloud/spanner/admin/database"
database_admin_client = Google::Cloud::Spanner::Admin::Database.database_admin
db_path = database_admin_client.database_path project: project_id,
instance: instance_id,
database: database_id
job = database_admin_client.update_database_ddl database: db_path,
statements: [
"ALTER TABLE Venues ADD COLUMN Revenue NUMERIC"
]
puts "Waiting for database update to complete"
job.wait_until_done!
puts "Added the Revenue as a numeric column in Venues table"
# [END spanner_add_numeric_column]
end
def write_struct_data project_id:, instance_id:, database_id:
# [START spanner_write_data_for_struct_queries]
# project_id = "Your Google Cloud project ID"
# instance_id = "Your Spanner instance ID"
# database_id = "Your Spanner database ID"
require "google/cloud/spanner"
spanner = Google::Cloud::Spanner.new project: project_id
client = spanner.client instance_id, database_id
client.commit do |c|
c.insert "Singers", [
{ SingerId: 6, FirstName: "Elena", LastName: "Campbell" },
{ SingerId: 7, FirstName: "Gabriel", LastName: "Wright" },
{ SingerId: 8, FirstName: "Benjamin", LastName: "Martinez" },
{ SingerId: 9, FirstName: "Hannah", LastName: "Harris" }
]
end
puts "Inserted Data for Struct queries"
# [END spanner_write_data_for_struct_queries]
end
def query_with_struct project_id:, instance_id:, database_id:
# [START spanner_create_struct_with_data]
name_struct = { FirstName: "Elena", LastName: "Campbell" }
# [END spanner_create_struct_with_data]
# [START spanner_query_data_with_struct]
# project_id = "Your Google Cloud project ID"
# instance_id = "Your Spanner instance ID"
# database_id = "Your Spanner database ID"
require "google/cloud/spanner"
spanner = Google::Cloud::Spanner.new project: project_id
client = spanner.client instance_id, database_id
client.execute(
"SELECT SingerId FROM Singers WHERE " +
"(FirstName, LastName) = @name",
params: { name: name_struct }
).rows.each do |row|
puts row[:SingerId]
end
# [END spanner_query_data_with_struct]
end
def query_with_array_of_struct project_id:, instance_id:, database_id:
# project_id = "Your Google Cloud project ID"
# instance_id = "Your Spanner instance ID"
# database_id = "Your Spanner database ID"
require "google/cloud/spanner"
spanner = Google::Cloud::Spanner.new project: project_id
client = spanner.client instance_id, database_id
# [START spanner_create_user_defined_struct]
name_type = client.fields FirstName: :STRING, LastName: :STRING
# [END spanner_create_user_defined_struct]
# [START spanner_create_array_of_struct_with_data]
band_members = [name_type.struct(["Elena", "Campbell"]),
name_type.struct(["Gabriel", "Wright"]),
name_type.struct(["Benjamin", "Martinez"])]
# [END spanner_create_array_of_struct_with_data]
# [START spanner_query_data_with_array_of_struct]
client.execute(
"SELECT SingerId FROM Singers WHERE " +
"STRUCT<FirstName STRING, LastName STRING>(FirstName, LastName) IN UNNEST(@names)",
params: { names: band_members }
).rows.each do |row|
puts row[:SingerId]
end
# [END spanner_query_data_with_array_of_struct]
end
def query_struct_field project_id:, instance_id:, database_id:
# [START spanner_field_access_on_struct_parameters]
# project_id = "Your Google Cloud project ID"
# instance_id = "Your Spanner instance ID"
# database_id = "Your Spanner database ID"
require "google/cloud/spanner"
spanner = Google::Cloud::Spanner.new project: project_id
client = spanner.client instance_id, database_id
name_struct = { FirstName: "Elena", LastName: "Campbell" }
client.execute(
"SELECT SingerId FROM Singers WHERE FirstName = @name.FirstName",
params: { name: name_struct }
).rows.each do |row|
puts row[:SingerId]
end
# [END spanner_field_access_on_struct_parameters]
end
def query_nested_struct_field project_id:, instance_id:, database_id:
# [START spanner_field_access_on_nested_struct_parameters]
# project_id = "Your Google Cloud project ID"
# instance_id = "Your Spanner instance ID"
# database_id = "Your Spanner database ID"
require "google/cloud/spanner"
spanner = Google::Cloud::Spanner.new project: project_id
client = spanner.client instance_id, database_id
name_type = client.fields FirstName: :STRING, LastName: :STRING
song_info_struct = {
SongName: "Imagination",
ArtistNames: [name_type.struct(["Elena", "Campbell"]), name_type.struct(["Hannah", "Harris"])]
}
client.execute(
"SELECT SingerId, @song_info.SongName " \
"FROM Singers WHERE STRUCT<FirstName STRING, LastName STRING>(FirstName, LastName) " \
"IN UNNEST(@song_info.ArtistNames)",
params: { song_info: song_info_struct }
).rows.each do |row|
puts (row[:SingerId]), (row[:SongName])
end
# [END spanner_field_access_on_nested_struct_parameters]
end
def update_data project_id:, instance_id:, database_id:
# [START spanner_update_data]
# project_id = "Your Google Cloud project ID"
# instance_id = "Your Spanner instance ID"
# database_id = "Your Spanner database ID"
require "google/cloud/spanner"
spanner = Google::Cloud::Spanner.new project: project_id
client = spanner.client instance_id, database_id
client.commit do |c|
c.update "Albums", [
{ SingerId: 1, AlbumId: 1, MarketingBudget: 100_000 },
{ SingerId: 2, AlbumId: 2, MarketingBudget: 500_000 }
]
end
puts "Updated data"
# [END spanner_update_data]
end
def update_data_with_timestamp_column project_id:, instance_id:, database_id:
# [START spanner_update_data_with_timestamp_column]
# project_id = "Your Google Cloud project ID"
# instance_id = "Your Spanner instance ID"
# database_id = "Your Spanner database ID"
require "google/cloud/spanner"
spanner = Google::Cloud::Spanner.new project: project_id
client = spanner.client instance_id, database_id
commit_timestamp = client.commit_timestamp
client.commit do |c|
c.update "Albums", [
{ SingerId: 1, AlbumId: 1, MarketingBudget: 100_000, LastUpdateTime: commit_timestamp },
{ SingerId: 2, AlbumId: 2, MarketingBudget: 750_000, LastUpdateTime: commit_timestamp }
]
end
puts "Updated data"
# [END spanner_update_data_with_timestamp_column]
end
def update_data_with_numeric_column project_id:, instance_id:, database_id:
# [START spanner_update_data_with_numeric_column]
# project_id = "Your Google Cloud project ID"
# instance_id = "Your Spanner instance ID"
# database_id = "Your Spanner database ID"
require "google/cloud/spanner"
spanner = Google::Cloud::Spanner.new project: project_id
client = spanner.client instance_id, database_id
client.commit do |c|
c.update "Venues", [
{ VenueId: 4, Revenue: "35000" },
{ VenueId: 19, Revenue: "104500" },
{ VenueId: 42, Revenue: "99999999999999999999999999999.99" }
]
end
puts "Updated data"
# [END spanner_update_data_with_numeric_column]
end
def query_data_with_new_column project_id:, instance_id:, database_id:
# [START spanner_query_data_with_new_column]
# project_id = "Your Google Cloud project ID"
# instance_id = "Your Spanner instance ID"
# database_id = "Your Spanner database ID"
require "google/cloud/spanner"
spanner = Google::Cloud::Spanner.new project: project_id
client = spanner.client instance_id, database_id
client.execute("SELECT SingerId, AlbumId, MarketingBudget FROM Albums").rows.each do |row|
puts "#{row[:SingerId]} #{row[:AlbumId]} #{row[:MarketingBudget]}"
end
# [END spanner_query_data_with_new_column]
end
def read_write_transaction project_id:, instance_id:, database_id:
# [START spanner_read_write_transaction]
# project_id = "Your Google Cloud project ID"
# instance_id = "Your Spanner instance ID"
# database_id = "Your Spanner database ID"
require "google/cloud/spanner"
spanner = Google::Cloud::Spanner.new project: project_id
client = spanner.client instance_id, database_id
transfer_amount = 200_000
client.transaction do |transaction|
first_album = transaction.read("Albums", [:MarketingBudget], keys: [[1, 1]]).rows.first
second_album = transaction.read("Albums", [:MarketingBudget], keys: [[2, 2]]).rows.first
raise "The second album does not have enough funds to transfer" if second_album[:MarketingBudget] < transfer_amount
new_first_album_budget = first_album[:MarketingBudget] + transfer_amount
new_second_album_budget = second_album[:MarketingBudget] - transfer_amount
transaction.update "Albums", [
{ SingerId: 1, AlbumId: 1, MarketingBudget: new_first_album_budget },
{ SingerId: 2, AlbumId: 2, MarketingBudget: new_second_album_budget }
]
end
puts "Transaction complete"
# [END spanner_read_write_transaction]
end
def query_data_with_index project_id:, instance_id:, database_id:, start_title: "Ardvark", end_title: "Goo"
# [START spanner_query_data_with_index]
# project_id = "Your Google Cloud project ID"
# instance_id = "Your Spanner instance ID"
# database_id = "Your Spanner database ID"
# start_title = "An album title to start with such as 'Ardvark'"
# end_title = "An album title to end with such as 'Goo'"
require "google/cloud/spanner"
spanner = Google::Cloud::Spanner.new project: project_id
client = spanner.client instance_id, database_id
sql_query = "SELECT AlbumId, AlbumTitle, MarketingBudget
FROM Albums@{FORCE_INDEX=AlbumsByAlbumTitle}
WHERE AlbumTitle >= @start_title AND AlbumTitle < @end_title"
params = { start_title: start_title, end_title: end_title }
param_types = { start_title: :STRING, end_title: :STRING }
client.execute(sql_query, params: params, types: param_types).rows.each do |row|
puts "#{row[:AlbumId]} #{row[:AlbumTitle]} #{row[:MarketingBudget]}"
end
# [END spanner_query_data_with_index]
end
def read_data_with_index project_id:, instance_id:, database_id:
# [START spanner_read_data_with_index]
# project_id = "Your Google Cloud project ID"
# instance_id = "Your Spanner instance ID"
# database_id = "Your Spanner database ID"
require "google/cloud/spanner"
spanner = Google::Cloud::Spanner.new project: project_id
client = spanner.client instance_id, database_id
result = client.read "Albums", [:AlbumId, :AlbumTitle],
index: "AlbumsByAlbumTitle"
result.rows.each do |row|
puts "#{row[:AlbumId]} #{row[:AlbumTitle]}"
end
# [END spanner_read_data_with_index]
end
def read_data_with_storing_index project_id:, instance_id:, database_id:
# [START spanner_read_data_with_storing_index]
# project_id = "Your Google Cloud project ID"
# instance_id = "Your Spanner instance ID"
# database_id = "Your Spanner database ID"
require "google/cloud/spanner"
spanner = Google::Cloud::Spanner.new project: project_id
client = spanner.client instance_id, database_id
result = client.read "Albums", [:AlbumId, :AlbumTitle, :MarketingBudget],
index: "AlbumsByAlbumTitle2"
result.rows.each do |row|
puts "#{row[:AlbumId]} #{row[:AlbumTitle]} #{row[:MarketingBudget]}"
end
# [END spanner_read_data_with_storing_index]
end
def read_only_transaction project_id:, instance_id:, database_id:
# [START spanner_read_only_transaction]
# project_id = "Your Google Cloud project ID"
# instance_id = "Your Spanner instance ID"
# database_id = "Your Spanner database ID"
require "google/cloud/spanner"
spanner = Google::Cloud::Spanner.new project: project_id
client = spanner.client instance_id, database_id
client.snapshot do |snapshot|
snapshot.execute("SELECT SingerId, AlbumId, AlbumTitle FROM Albums").rows.each do |row|
puts "#{row[:AlbumId]} #{row[:AlbumTitle]} #{row[:SingerId]}"
end
# Even if changes occur in-between the reads, the transaction ensures that
# both return the same data.
snapshot.read("Albums", [:AlbumId, :AlbumTitle, :SingerId]).rows.each do |row|
puts "#{row[:AlbumId]} #{row[:AlbumTitle]} #{row[:SingerId]}"
end
end
# [END spanner_read_only_transaction]
end
def spanner_batch_client project_id:, instance_id:, database_id:
# [START spanner_batch_client]
# project_id = "Your Google Cloud project ID"
# instance_id = "Your Spanner instance ID"
# database_id = "Your Spanner database ID"
require "google/cloud/spanner"
# Prepare a thread pool with number of processors
processor_count = Concurrent.processor_count
thread_pool = Concurrent::FixedThreadPool.new processor_count
# Prepare AtomicFixnum to count total records using multiple threads
total_records = Concurrent::AtomicFixnum.new
# Create a new Spanner batch client
spanner = Google::Cloud::Spanner.new project: project_id
batch_client = spanner.batch_client instance_id, database_id
# Get a strong timestamp bound batch_snapshot
batch_snapshot = batch_client.batch_snapshot strong: true
# Get partitions for specified query
# data_boost_enabled option is an optional parameter which can be used for partition read
# and query to execute the request via spanner independent compute resources.
partitions = batch_snapshot.partition_query "SELECT SingerId, FirstName, LastName FROM Singers", data_boost_enabled: true
total_partitions = partitions.size
# Enqueue a new thread pool job
partitions.each_with_index do |partition, _partition_index|
thread_pool.post do
# Increment total_records per new row
batch_snapshot.execute_partition(partition).rows.each do |_row|
total_records.increment
end
end
end
# Wait for queued jobs to complete
thread_pool.shutdown
thread_pool.wait_for_termination
# Close the client connection and release resources.
batch_snapshot.close
# Collect statistics for batch query
average_records_per_partition = 0.0
if total_partitions != 0