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module ArJdbc
module PostgreSQL
# @private these are defined on the Adapter class since 4.2
module ColumnHelpers
def extract_limit(sql_type) # :nodoc:
case sql_type
when /^bigint/i, /^int8/i then 8
when /^smallint/i then 2
when /^timestamp/i then nil
else
super
end
end
# Extracts the value from a PostgreSQL column default definition.
def extract_value_from_default(default)
case default
# Quoted types
when /\A[\(B]?'(.*)'.*::"?([\w. ]+)"?(?:\[\])?\z/m
# The default 'now'::date is CURRENT_DATE
if $1 == "now".freeze && $2 == "date".freeze
nil
else
$1.gsub("''".freeze, "'".freeze)
end
# Boolean types
when 'true'.freeze, 'false'.freeze
default
# Numeric types
when /\A\(?(-?\d+(\.\d*)?)\)?(::bigint)?\z/
$1
# Object identifier types
when /\A-?\d+\z/
$1
else
# Anything else is blank, some user type, or some function
# and we can't know the value of that, so return nil.
nil
end
end
def extract_default_function(default_value, default)
default if has_default_function?(default_value, default)
end
def has_default_function?(default_value, default)
!default_value && %r{\w+\(.*\)|\(.*\)::\w+|CURRENT_DATE|CURRENT_TIMESTAMP} === default
end
end
end
end
Version data entries
22 entries across 22 versions & 2 rubygems