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MDEV-14694 ALTER COLUMN IF EXISTS .. causes syntax error.

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Implementing the 'IF EXISTS' option for statements
        ALTER TABLE ALTER COLUMN SET/DROP DEFAULT.
This commit is contained in:
Alexey Botchkov
2018-01-30 17:08:36 +04:00
parent 5478547c96
commit 926adcfeea
7 changed files with 85 additions and 29 deletions
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2
sql/sql_lex.h
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@ -3645,6 +3645,8 @@ public:
alter_info.check_constraint_list.push_back(constr);
return false;
}
bool add_alter_list(const char *par_name, Virtual_column_info *expr,
bool par_exists);
void set_command(enum_sql_command command,
DDL_options_st options)
{