Should be changed for v6.3!

 Polygon input would not accept single-point polygon output and dump.

clauses.

Add SQL/92 types decimal and numeric (temporary for syntax support).
 These types need more support in the backend to be really implemented,
 and the parser will need to be changed at that time.
Adjust limits on precision parameters for FLOAT(p) to match IEEE-compliant
 arithmetic. Perhaps these limits should be processor-specific or obtained
 from system include files instead.

Add SQL/92 "constants" current_date, current_time, and current_timestamp.

 like newline inside quoted strings.

for regress test.

Allow use IDENT as arguments of trigger functions

in upper Executor memory context.