diff options
Diffstat (limited to 'src/backend/parser/parser.c')
| -rw-r--r-- | src/backend/parser/parser.c | 29 |
1 files changed, 28 insertions, 1 deletions
diff --git a/src/backend/parser/parser.c b/src/backend/parser/parser.c index 0e6ef778d0..919d673031 100644 --- a/src/backend/parser/parser.c +++ b/src/backend/parser/parser.c @@ -97,8 +97,35 @@ filtered_base_yylex(void) /* Do we need to look ahead for a possible multiword token? */ switch (cur_token) { - case WITH: + case NULLS_P: + /* + * NULLS FIRST and NULLS LAST must be reduced to one token + */ + cur_yylval = base_yylval; + cur_yylloc = base_yylloc; + next_token = base_yylex(); + switch (next_token) + { + case FIRST_P: + cur_token = NULLS_FIRST; + break; + case LAST_P: + cur_token = NULLS_LAST; + break; + default: + /* save the lookahead token for next time */ + lookahead_token = next_token; + lookahead_yylval = base_yylval; + lookahead_yylloc = base_yylloc; + have_lookahead = true; + /* and back up the output info to cur_token */ + base_yylval = cur_yylval; + base_yylloc = cur_yylloc; + break; + } + break; + case WITH: /* * WITH CASCADED, LOCAL, or CHECK must be reduced to one token * |