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add common table expression in MySQL (#314)

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This commit is contained in:
Aristoeu
2021-09-02 14:24:01 +08:00
committed by wangzelin.wzl
parent 5f209b30fe
commit 153f16ad8a
33 changed files with 136129 additions and 40650 deletions
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140
src/sql/parser/sql_parser_mysql_mode.y
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@ -331,6 +331,7 @@ END_P SET_VAR DELIMITER
%type <node> insert_vals_list insert_vals value_or_values
%type <node> select_with_parens select_no_parens select_clause select_into no_table_select_with_order_and_limit simple_select_with_order_and_limit select_with_parens_with_order_and_limit select_clause_set select_clause_set_left select_clause_set_right select_clause_set_with_order_and_limit
%type <node> simple_select no_table_select limit_clause select_expr_list
%type <node> with_select with_clause with_list common_table_expr opt_column_alias_name_list alias_name_list column_alias_name
%type <node> opt_where opt_hint_value opt_groupby opt_rollup opt_order_by order_by opt_having groupby_clause
%type <node> opt_limit_clause limit_expr opt_for_update opt_for_update_wait
%type <node> sort_list sort_key opt_asc_desc sort_list_for_group_by sort_key_for_group_by opt_asc_desc_for_group_by opt_column_id
@ -6645,6 +6646,10 @@ select_no_parens opt_when
{
$$ = $1;
}
| with_select
{
$$ = $1;
}
;
// for select_into
@ -6667,7 +6672,10 @@ select_no_parens into_clause
select_with_parens:
'(' select_no_parens ')' { $$ = $2; }
| '(' select_with_parens ')' { $$ = $2; }
;
| '(' with_select ')'
{
$$ = $2;
};
select_no_parens:
select_clause opt_for_update
@ -8880,6 +8888,135 @@ OUTER { $$ = NULL; }
| /* EMPTY */ { $$ = NULL; }
;
/*****************************************************************************
*
* with clause (common table expression) (Mysql CTE grammer implement)
*
*
*****************************************************************************/
with_select:
with_clause select_no_parens opt_when
{
$$ = $2;
$$->children_[PARSE_SELECT_WHEN] = $3;
if (NULL == $$->children_[PARSE_SELECT_FOR_UPD] && NULL != $3)
{
malloc_terminal_node($$->children_[PARSE_SELECT_FOR_UPD], result->malloc_pool_, T_INT);
$$->children_[PARSE_SELECT_FOR_UPD]->value_ = -1;
}
$$->children_[PARSE_SELECT_WITH] = $1;
}
| with_clause select_with_parens
{
$$ = $2;
$$->children_[PARSE_SELECT_WITH] = $1;
}
;
with_clause:
WITH with_list
{
ParseNode *with_list = NULL;
merge_nodes(with_list, result, T_WITH_CLAUSE_LIST, $2);
$$ = with_list;
$$->value_ = 0;
}
|
WITH RECURSIVE with_list
{
ParseNode *with_list = NULL;
merge_nodes(with_list, result, T_WITH_CLAUSE_LIST, $3);
$$ = with_list;
$$->value_ = 1;
}/*
|
WITH RECURSIVE common_table_expr
{
$$ = $3;
$$->value_ = 0;
}*/
;
with_list:
with_list ',' common_table_expr
{
malloc_non_terminal_node($$, result->malloc_pool_, T_LINK_NODE, 2, $1, $3);
}
|common_table_expr
{
$$ = $1;
}
;
common_table_expr:
relation_name opt_column_alias_name_list AS '(' select_no_parens ')'
{
malloc_non_terminal_node($$, result->malloc_pool_, T_WITH_CLAUSE_AS, 5, $1, $2, $5, NULL, NULL);
}
| relation_name opt_column_alias_name_list AS '(' with_select ')'
{
malloc_non_terminal_node($$, result->malloc_pool_, T_WITH_CLAUSE_AS, 5, $1, $2, $5, NULL, NULL);
}
| relation_name opt_column_alias_name_list AS '(' select_with_parens ')'
{
if ($5->children_[PARSE_SELECT_ORDER] != NULL && $5->children_[PARSE_SELECT_FETCH] == NULL) {
yyerror(NULL, result, "only order by clause can't occur subquery\n");
YYABORT_PARSE_SQL_ERROR;
} else {
malloc_non_terminal_node($$, result->malloc_pool_, T_WITH_CLAUSE_AS, 5, $1, $2, $5, NULL, NULL);
}
}
;
opt_column_alias_name_list:
'(' alias_name_list ')'
{
ParseNode *col_alias_list = NULL;
merge_nodes(col_alias_list, result, T_COLUMN_LIST, $2);
$$ = col_alias_list;
}
|/*EMPTY*/
{ $$ = NULL; }
;
alias_name_list:
column_alias_name
{
$$ = $1;
}
|alias_name_list ',' column_alias_name
{
malloc_non_terminal_node($$, result->malloc_pool_, T_LINK_NODE, 2, $1, $3);
}
;
column_alias_name:
column_name
{
$$ = $1;
}
;
/*
search_list:
search_key
{ $$ = $1; }
| search_list ',' search_key
{ malloc_non_terminal_node($$, result->malloc_pool_, T_LINK_NODE, 2, $1, $3); }
;
search_key:
column_name opt_asc_desc
{
malloc_non_terminal_node($$, result->malloc_pool_, T_SORT_KEY, 2, $1, $2);
}
;*/
/*****************************************************************************
*
* CREATE OUTLINE grammar
@ -13189,6 +13326,7 @@ ACCOUNT
| REBUILD
| RECOVER
| RECOVERY
| RECURSIVE
| RECYCLE
| RECYCLEBIN
| ROTATE