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Adaptive comment

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This commit is contained in:
ds0
2021-08-25 20:24:32 +08:00
committed by wangzelin.wzl
parent 61b6d05660
commit cb791d8812
6 changed files with 47723 additions and 118817 deletions
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43
src/sql/parser/sql_parser_mysql_mode.l
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@ -10,6 +10,9 @@
* See the Mulan PubL v2 for more details.
*/
/* unput() change the yyin but it doesn't change ParserResult->input_sql_.
// use unput() function may have unexpected result while copy string.
*/
%option noyywrap nounput noinput nodefault case-insensitive
%option noyyalloc noyyrealloc noyyfree
%option reentrant bison-bridge bison-locations
@ -84,6 +87,10 @@ btend {backtick}
btdouble {backtick}{backtick}
btcontent [^`]+
mysql_compatible_comment_with_version \/\*\![0-9]{5}
mysql_compatible_comment_without_version \/\*\!
mysql_compatible_comment_end \*\/
rowidPattern (WITH{whitespace}ROWID)
%%
@ -1139,6 +1146,14 @@ Timestamp{whitespace}?\"[^\"]*\" {
}
}
{mysql_compatible_comment_without_version} {
// if is a mysql comment without version. For example, /*!any sql str*/
// mysql_comment without version, processed as common sql str;
// place before `c_cmt_begin` to avoid (the '/*!') being hidden by '/*')
ParseResult *p = (ParseResult *)yyextra;
p->mysql_compatible_comment_ = true;
}
{c_cmt_begin} {
BEGIN(in_c_comment);
#ifdef SQL_PARSER_COMPILATION
@ -1171,6 +1186,25 @@ BEGIN(in_c_comment);
#endif
}
{mysql_compatible_comment_end} {
//for mysql compatible comment:
// only "*/" should be matched, duplicated '*' (e.g., "***/") will report a error.
ParseResult *p = (ParseResult *)yyextra;
if (p->mysql_compatible_comment_){
p->mysql_compatible_comment_ = false;
BEGIN(INITIAL);
} else {
// The sql could be "select */*!xxx*/ from t1;". We can't directly raise a syntax
// error here. We should treat the "*/" as '*' and '/' by return '*' and unput '/';
// yyless will change the yytext and yyleng.
char c_ret = yytext[0];
yyless(1);
p->yycolumn_ = p->yycolumn_ - 1;
return c_ret;
}
}
<in_c_comment><<EOF>> {
yyerror(yylloc, yyextra, "unterminated log_level string\n");
return PARSER_SYNTAX_ERROR;
@ -1401,6 +1435,15 @@ BEGIN(in_c_comment);
}
}
{mysql_compatible_comment_with_version} {
// comment with version: /*!50600 any sql str*/
// comment without version: /*!any sql str*/
// we do not add a start_condition, since some sql string need to be processed in INITIAL state.
// instead of a new start_condition, we use a extra field (mysql_compatible_comment_) to mark the adaptive comment.
ParseResult *p = (ParseResult *)yyextra;
p->mysql_compatible_comment_ = true;
}
[\n] {
yylineno ++;
if (IS_FAST_PARAMETERIZE) {