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add Mysql Feature ON UPDATE Syntax. It supports CREATE TABLE/ALTER TABLE DDL, and tools which include pg_dump and gsql adaptiving.

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根据社区评审意见，对代码进行修改和优化。
This commit is contained in:
lvhui
2022-06-27 16:31:37 +08:00
parent b07c959bd0
commit d5a9c5ff35
37 changed files with 1388 additions and 80 deletions
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32
src/common/backend/parser/parser.cpp
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@ -480,6 +480,38 @@ int base_yylex(YYSTYPE* lvalp, YYLTYPE* llocp, core_yyscan_t yyscanner)
break;
}
break;
case ON:
cur_yylval = lvalp->core_yystype;
cur_yylloc = *llocp;
next_token = core_yylex(&(lvalp->core_yystype), llocp, yyscanner);
/* get first token after ON (Normal UPDATE). We don't care what it is */
yyextra->lookahead_token[1] = next_token;
yyextra->lookahead_yylval[1] = lvalp->core_yystype;
yyextra->lookahead_yylloc[1] = *llocp;
/* get the second token after ON. */
next_token = core_yylex(&(lvalp->core_yystype), llocp, yyscanner);
yyextra->lookahead_token[0] = next_token;
yyextra->lookahead_yylval[0] = lvalp->core_yystype;
yyextra->lookahead_yylloc[0] = *llocp;
yyextra->lookahead_num = 2;
switch (next_token) {
case CURRENT_TIMESTAMP:
case CURRENT_TIME:
case CURRENT_DATE:
case LOCALTIME:
case LOCALTIMESTAMP:
cur_token = ON_UPDATE_TIME;
lvalp->core_yystype = cur_yylval;
*llocp = cur_yylloc;
break;
default:
/* and back up the output info to cur_token */
lvalp->core_yystype = cur_yylval;
*llocp = cur_yylloc;
break;
}
break;
default:
break;
}