Reference documentation and code samples for the Cloud Spanner API class Google::Cloud::Spanner::Range.
Range
Represents a range of rows in a table or index. A range has a start key and an end key. These keys can be open or closed, indicating if the range includes rows with that key.
Inherits
- Object
Example
require "google/cloud/spanner" spanner = Google::Cloud::Spanner.new db = spanner.client "my-instance", "my-database" key_range = db.range 1, 100 results = db.read "users", [:id, :name], keys: key_range results.rows.each do |row| puts "User #{row[:id]} is #{row[:name]}" end
Methods
#begin
def begin()
Returns the object that defines the beginning of the range.
#end
def end()
Returns the object that defines the end of the range.
#exclude_begin?
def exclude_begin?() -> Boolean
Returns true
if the range excludes its beginning value.
- (Boolean)
#exclude_end?
def exclude_end?() -> Boolean
Returns true
if the range excludes its end value.
- (Boolean)
#initialize
def initialize(beginning, ending, exclude_begin: false, exclude_end: false) -> Range
Creates a Spanner Range. This can be used in place of a Ruby Range when needing to exclude the beginning value.
- beginning (Object) — The object that defines the beginning of the range.
- ending (Object) — The object that defines the end of the range.
-
exclude_begin (Boolean) (defaults to: false) — Determines if the range excludes its
beginning value. Default is
false
. -
exclude_end (Boolean) (defaults to: false) — Determines if the range excludes its
ending value. Default is
false
.
- (Range) — a new instance of Range
require "google/cloud/spanner" spanner = Google::Cloud::Spanner.new db = spanner.client "my-instance", "my-database" key_range = Google::Cloud::Spanner::Range.new 1, 100 results = db.read "users", [:id, :name], keys: key_range results.rows.each do |row| puts "User #{row[:id]} is #{row[:name]}" end