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Code cleanup for assign_transaction_read_only.

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As in commit fb4c5d2798 on 2011-01-21,
this avoids spurious debug messages and allows idempotent changes at
any time.  Along the way, make assign_XactIsoLevel allow idempotent
changes even when not within a subtransaction, to be consistent with
the new coding of assign_transaction_read_only and because there's
no compelling reason to do otherwise.

Kevin Grittner, with some adjustments.
This commit is contained in:
Robert Haas
2011-01-22 20:51:32 -05:00
parent cc73c16050
commit 6f59777c65
5 changed files with 170 additions and 31 deletions
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2
src/include/commands/variable.h
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@ -21,6 +21,8 @@ extern const char *show_timezone(void);
extern const char *assign_log_timezone(const char *value,
bool doit, GucSource source);
extern const char *show_log_timezone(void);
extern bool assign_transaction_read_only(bool value,
bool doit, GucSource source);
extern const char *assign_XactIsoLevel(const char *value,
bool doit, GucSource source);
extern const char *show_XactIsoLevel(void);