diff options
Diffstat (limited to 'src/backend/parser/scan.l')
| -rw-r--r-- | src/backend/parser/scan.l | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/src/backend/parser/scan.l b/src/backend/parser/scan.l index 96f51bfd596..950b8b85918 100644 --- a/src/backend/parser/scan.l +++ b/src/backend/parser/scan.l @@ -339,6 +339,15 @@ identifier {ident_start}{ident_cont}* typecast "::" dot_dot \.\. colon_equals ":=" + +/* + * These operator-like tokens (unlike the above ones) also match the {operator} + * rule, which means that they might be overridden by a longer match if they + * are followed by a comment start or a + or - character. Accordingly, if you + * add to this list, you must also add corresponding code to the {operator} + * block to return the correct token in such cases. (This is not needed in + * psqlscan.l since the token value is ignored there.) + */ equals_greater "=>" less_equals "<=" greater_equals ">=" @@ -929,6 +938,25 @@ other . if (nchars == 1 && strchr(",()[].;:+-*/%^<>=", yytext[0])) return yytext[0]; + /* + * Likewise, if what we have left is two chars, and + * those match the tokens ">=", "<=", "=>", "<>" or + * "!=", then we must return the appropriate token + * rather than the generic Op. + */ + if (nchars == 2) + { + if (yytext[0] == '=' && yytext[1] == '>') + return EQUALS_GREATER; + if (yytext[0] == '>' && yytext[1] == '=') + return GREATER_EQUALS; + if (yytext[0] == '<' && yytext[1] == '=') + return LESS_EQUALS; + if (yytext[0] == '<' && yytext[1] == '>') + return NOT_EQUALS; + if (yytext[0] == '!' && yytext[1] == '=') + return NOT_EQUALS; + } } /* |