fix typos

src/sql/parser/ob_parser.h

@@ -77,7 +77,7 @@ public:
   //  situation we will try find ';' delimiter to parser part of string in case of save memory,
   //  but this maybe parser error and throw error info. However, we will still try parser remain
   //  string when parse part of string failed, if we throw parse part error info, maybe will let
-  //  someone misunderstand have bug, So, we introduce this mark to decide to throw parser erorr.
+  //  someone misunderstand have bug, So, we introduce this mark to decide to throw parser error.
   //  eg: select '123;' from dual; select '123' from dual;
   int parse_sql(const common::ObString &stmt,
                 ParseResult &parse_result,

src/sql/parser/parse_malloc.cpp

@@ -33,7 +33,7 @@ void *malloc_parentheses_info(const size_t nbyte, void *malloc_pool)
   return ptr;
 }
 
-// get memory from the thread obStringBuf, and not release untill thread quits
+// get memory from the thread obStringBuf, and not release until thread quits
 void *parse_malloc(const size_t nbyte, void *malloc_pool)
 {
   void *ptr = NULL;

src/sql/parser/sql_parser_base.h

@@ -240,7 +240,7 @@ do {
     setup_token_pos_info(node, word_start - 1, word_end - word_start + 1);  \
   } while (0)
 
-//oralce下生成非保留关键字结点请使用该宏,区别于mysql的是做了大写的转换
+//oracle下生成非保留关键字结点请使用该宏,区别于mysql的是做了大写的转换
 #define get_oracle_non_reserved_node(node, malloc_pool, expr_start, expr_end) \
   do {                                                                 \
     malloc_terminal_node(node, malloc_pool, T_IDENT);                   \