MDEV-10139 Support for SEQUENCE objects

Working features:
CREATE OR REPLACE [TEMPORARY] SEQUENCE [IF NOT EXISTS] name
    [ INCREMENT [ BY | = ] increment ]
    [ MINVALUE [=] minvalue | NO MINVALUE ]
    [ MAXVALUE [=] maxvalue | NO MAXVALUE ]
    [ START [ WITH | = ] start ] [ CACHE [=] cache ] [ [ NO ] CYCLE ]
    ENGINE=xxx COMMENT=".."
SELECT NEXT VALUE FOR sequence_name;
SELECT NEXTVAL(sequence_name);
SELECT PREVIOUS VALUE FOR sequence_name;
SELECT LASTVAL(sequence_name);

SHOW CREATE SEQUENCE sequence_name;
SHOW CREATE TABLE sequence_name;
CREATE TABLE sequence-structure ... SEQUENCE=1
ALTER TABLE sequence RENAME TO sequence2;
RENAME TABLE sequence TO sequence2;
DROP [TEMPORARY] SEQUENCE  [IF EXISTS] sequence_names

Missing features
- SETVAL(value,sequence_name), to be used with replication.
- Check replication, including checking that sequence tables are marked
  not transactional.
- Check that a commit happens for NEXT VALUE that changes table data (may
  already work)
- ALTER SEQUENCE. ANSI SQL version of setval.
- Share identical sequence entries to not add things twice to table list.
- testing insert/delete/update/truncate/load data
- Run and fix Alibaba sequence tests (part of mysql-test/suite/sql_sequence)
- Write documentation for NEXT VALUE / PREVIOUS_VALUE
- NEXTVAL in DEFAULT
  - Ensure that NEXTVAL in DEFAULT uses database from base table
- Two NEXTVAL for same row should give same answer.
- Oracle syntax sequence_table.nextval, without any FOR or FROM.
- Sequence tables are treated as 'not read constant tables' by SELECT; Would
  be better if we would have a separate list for sequence tables so that
  select doesn't know about them, except if refereed to with FROM.

Other things done:
- Improved output for safemalloc backtrack
- frm_type_enum changed to Table_type
- Removed lex->is_view and replaced with lex->table_type. This allows
  use to more easy check if item is view, sequence or table.
- Added table flag HA_CAN_TABLES_WITHOUT_ROLLBACK, needed for handlers
  that want's to support sequences
- Added handler calls:
 - engine_name(), to simplify getting engine name for partition and sequences
 - update_first_row(), to be able to do efficient sequence implementations.
 - Made binlog_log_row() global to be able to call it from ha_sequence.cc
- Added handler variable: row_already_logged, to be able to flag that the
  changed row is already logging to replication log.
- Added CF_DB_CHANGE and CF_SCHEMA_CHANGE flags to simplify
  deny_updates_if_read_only_option()
- Added sp_add_cfetch() to avoid new conflicts in sql_yacc.yy
- Moved code for add_table_options() out from sql_show.cc::show_create_table()
- Added String::append_longlong() and used it in sql_show.cc to simplify code.
- Added extra option to dd_frm_type() and ha_table_exists to indicate if
  the table is a sequence. Needed by DROP SQUENCE to not drop a table.

1 files changed, 7 insertions, 3 deletions

diff --git a/sql/temporary_tables.cc b/sql/temporary_tables.cc
index c05fc632a94..0aa5396f35b 100644
--- a/sql/temporary_tables.cc
+++ b/sql/temporary_tables.cc
@@ -73,7 +73,9 @@ TABLE *THD::create_and_open_tmp_table(handlerton *hton,
 
   if ((share= create_temporary_table(hton, frm, path, db, table_name)))
   {
+    open_options|= HA_OPEN_FOR_CREATE;
     table= open_temporary_table(share, table_name, open_in_engine);
+    open_options&= ~HA_OPEN_FOR_CREATE;
 
     /*
       Failed to open a temporary table instance. As we are not passing
@@ -1117,8 +1119,10 @@ TABLE *THD::open_temporary_table(TMP_TABLE_SHARE *share,
 
   if (open_table_from_share(this, share, alias,
                             open_in_engine ? (uint)HA_OPEN_KEYFILE : 0,
-                            EXTRA_RECORD, ha_open_options, table,
-                            open_in_engine ? false : true))
+                            EXTRA_RECORD,
+                            (ha_open_options |
+                             (open_options & HA_OPEN_FOR_CREATE)),
+                            table, open_in_engine ? false : true))
   {
     my_free(table);
     DBUG_RETURN(NULL);
@@ -1126,7 +1130,7 @@ TABLE *THD::open_temporary_table(TMP_TABLE_SHARE *share,
 
   table->reginfo.lock_type= TL_WRITE;           /* Simulate locked */
   table->grant.privilege= TMP_TABLE_ACLS;
-  share->tmp_table= (table->file->has_transactions() ?
+  share->tmp_table= (table->file->has_transaction_manager() ?
                      TRANSACTIONAL_TMP_TABLE : NON_TRANSACTIONAL_TMP_TABLE);
 
   table->pos_in_table_list= 0;