
>COMMIT</TT
>, etc) and commands that cannot be executed inside a
     transaction block (such as <TT
CLASS="COMMAND"
>VACUUM</TT
>).  This is because the
     script files are implicitly executed within a transaction block.
    </P
><P
>     An extension's <ACRONYM
CLASS="ACRONYM"
>SQL</ACRONYM
> script files can also contain lines
     beginning with <TT
CLASS="LITERAL"
>\echo</TT
>, which will be ignored (treated as
     comments) by the extension mechanism.  This provision is commonly used
     to thro