085f931f52
Formerly, when specifying NUMERIC(precision, scale), the scale had to be in the range [0, precision], which was per SQL spec. This commit extends the range of allowed scales to [-1000, 1000], independent of the precision (whose valid range remains [1, 1000]). A negative scale implies rounding before the decimal point. For example, a column might be declared with a scale of -3 to round values to the nearest thousand. Note that the display scale remains non-negative, so in this case the display scale will be zero, and all digits before the decimal point will be displayed. A scale greater than the precision supports fractional values with zeros immediately after the decimal point. Take the opportunity to tidy up the code that packs, unpacks and validates the contents of a typmod integer, encapsulating it in a small set of new inline functions. Bump the catversion because the allowed contents of atttypmod have changed for numeric columns. This isn't a change that requires a re-initdb, but negative scale values in the typmod would confuse old backends. Dean Rasheed, with additional improvements by Tom Lane. Reviewed by Tom Lane. Discussion: https://postgr.es/m/CAEZATCWdNLgpKihmURF8nfofP0RFtAKJ7ktY6GcZOPnMfUoRqA@mail.gmail.com
PostgreSQL Database Management System ===================================== This directory contains the source code distribution of the PostgreSQL database management system. PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings. PostgreSQL has many language interfaces, many of which are listed here: https://www.postgresql.org/download/ See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.