$ and EXEC SQL keywords difference in typedef

Hello, I've discovered a little difference in "$" and "EXEC SQL" behavior while using typedef. If I use $typedef struct { char currency[4]; double value; } crossrate; then all is OK, but when I try ANSI standard: EXEC SQL typedef struct { char currency[4]; double value; } crossrate; then I receive the warning: line 8: Warning -33051: Syntax error on identifier or symbol 'EXEC SQL'. May I escape from warning or not? Thank you! Irina Kotlova RESEARCH & TRADE RUSSIA e-mail: irina@accom.ru , irina@rtr.transit.ru phone: +7 095 959-43-06 (additional 24) +7 095 959-43-13 (additional 24)