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SQL: regression fix: make NOW a valid identifier again [#363]

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* again, as in 10.2, NOW is a keyword only if followed by parentheses
* use AS OF CURRENT_TIMESTAMP or AS OF NOW()
* AS OF CURRENT_TIMESTAMP and AS OF NOW() mean AS OF NOW(6),
  not AS OF NOW(0), (same behavior as in a DEFAULT clause)
This commit is contained in:
Sergei Golubchik
2017-12-02 16:23:16 +01:00
committed by Aleksey Midenkov
parent d3845132fc
commit ea1ccfa500
12 changed files with 79 additions and 66 deletions
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8
mysql-test/suite/versioning/r/derived.result
View File

@ -152,13 +152,13 @@ y x
with s3 as (select *, t1.sys_trx_end from t2, t1 for system_time as of timestamp @t0) select * from s3;
y x
10 1
select * from (select *, t1.sys_trx_start from t2 for system_time as of now, t1) as s4 for system_time as of timestamp @t0;
select * from (select *, t1.sys_trx_start from t2 for system_time as of current_timestamp, t1) as s4 for system_time as of timestamp @t0;
y x
10 1
with s5 as (select *, t1.sys_trx_start from t2 for system_time as of now, t1) select * from s5 for system_time as of timestamp @t0;
with s5 as (select *, t1.sys_trx_start from t2 for system_time as of current_timestamp, t1) select * from s5 for system_time as of timestamp @t0;
y x
10 1
with s6 as (select *, t1.sys_trx_start from t2 for system_time as of now, t1) select * from s6 for system_time as of timestamp @t0;
with s6 as (select *, t1.sys_trx_start from t2 for system_time as of current_timestamp, t1) select * from s6 for system_time as of timestamp @t0;
y x
10 1
set @q= concat("create view vt1 as select * from t1 for system_time as of timestamp '", @t0, "'");
@ -174,7 +174,7 @@ x y
select * from (select *, vt1.sys_trx_end from t2, vt1) as s0;
y x
10 1
select * from (select *, vt1.sys_trx_start from t2 for system_time as of now, vt1) as s0 for system_time as of timestamp @t0;
select * from (select *, vt1.sys_trx_start from t2 for system_time as of current_timestamp, vt1) as s0 for system_time as of timestamp @t0;
y x
10 1
drop table t1, t2;