What type of Compiler to SQL? Memory-Image (Load-and-Go) Format?

[Wen Yi <chuxuec@xxxxxxxxxxx>]

Hi team,

I am a newbie to the postgres.

When I am studying the compiler,the text book tell me there is there type of compiler.

1. Assembly Language Format
2. Relocatable Binary Format
3. Memory-Image (Load-and-Go) Format

I check the postgres's sql compiler, and it's achieved by lex & yacc.

So What type of Compiler to SQL? Is Memory-Image (Load-and-Go) Format ?

Thanks in advance!

Yours,

WenYi