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Parser, SQL: (0.4) TRANSACTION support in queries

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Syntax extension: TIMESTAMP/TRANSACTION keyword can be used before FROM ... TO, BETWEEN ... AND.
Example:
    SELECT * FROM t1 FOR SYSTEM_TIME TIMESTAMP FROM '1-1-1' TO NOW();

Closes #27
This commit is contained in:
Aleksey Midenkov
2016-10-14 13:25:28 +00:00
parent a22cbc453f
commit 6d89a4a49b
6 changed files with 101 additions and 31 deletions
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2
sql/sql_lex.h
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@@ -2649,7 +2649,6 @@ struct LEX: public Query_tables_list
private:
Query_arena_memroot *arena_for_set_stmt;
MEM_ROOT *mem_root_for_set_stmt;
void parse_error();
bool sp_block_finalize(THD *thd, const Lex_spblock_st spblock,
class sp_label **splabel);
bool sp_change_context(THD *thd, const sp_pcontext *ctx, bool exclusive);
@@ -2663,6 +2662,7 @@ private:
bool sp_for_loop_increment(THD *thd, const Lex_for_loop_st &loop);
public:
void parse_error(uint err_number= ER_SYNTAX_ERROR);
inline bool is_arena_for_set_stmt() {return arena_for_set_stmt != 0;}
bool set_arena_for_set_stmt(Query_arena *backup);
void reset_arena_for_set_stmt(Query_arena *backup);