diff options
| -rw-r--r-- | activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb b/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb index b764f26ec8..bcb975e8e1 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb @@ -341,6 +341,12 @@ module ActiveRecord # * <tt>:scale</tt> - # Specifies the scale for a <tt>:decimal</tt> column. # + # For clarity's sake: the precision is the number of significant digits, + # while the scale is the number of digits that can be stored following + # the decimal point. For example, the number 123.45 has a precision of 5 + # and a scale of 2. A decimal with a precision of 5 and a scale of 2 can + # range from -999.99 to 999.99. + # # Please be aware of different RDBMS implementations behavior with # <tt>:decimal</tt> columns: # * The SQL standard says the default scale should be 0, <tt>:scale</tt> <= |