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Turn transaction_isolation into GUC enum

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It was previously a string setting that was converted into an enum by
custom code, but using the GUC enum facility seems much simpler and
doesn't change any functionality, except that

    set transaction_isolation='default';

no longer works, but that was never documented and doesn't work with
any other transaction characteristics.  (Note that this is not the
same as RESET or SET TO DEFAULT, which still work.)

Reviewed-by: Heikki Linnakangas <hlinnaka@iki.fi>
Discussion: https://www.postgresql.org/message-id/457db615-e84c-4838-310e-43841eb806e5@iki.fi
This commit is contained in:
Peter Eisentraut
2018-10-09 21:21:57 +02:00
parent b6b297d20d
commit f8c10f616f
3 changed files with 15 additions and 71 deletions
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4
src/include/commands/variable.h
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@ -22,9 +22,7 @@ extern bool check_log_timezone(char **newval, void **extra, GucSource source);
extern void assign_log_timezone(const char *newval, void *extra);
extern const char *show_log_timezone(void);
extern bool check_transaction_read_only(bool *newval, void **extra, GucSource source);
extern bool check_XactIsoLevel(char **newval, void **extra, GucSource source);
extern void assign_XactIsoLevel(const char *newval, void *extra);
extern const char *show_XactIsoLevel(void);
extern bool check_XactIsoLevel(int *newval, void **extra, GucSource source);
extern bool check_transaction_deferrable(bool *newval, void **extra, GucSource source);
extern bool check_random_seed(double *newval, void **extra, GucSource source);
extern void assign_random_seed(double newval, void *extra);