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trigger.c

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    • Simon Riggs's avatar
      2dbbda02
      Reduce lock levels of CREATE TRIGGER and some ALTER TABLE, CREATE RULE actions. · 2dbbda02
      Simon Riggs authored 
      Avoid hard-coding lockmode used for many altering DDL commands, allowing easier
future changes of lock levels. Implementation of initial analysis on DDL
sub-commands, so that many lock levels are now at ShareUpdateExclusiveLock or
ShareRowExclusiveLock, allowing certain DDL not to block reads/writes.
First of number of planned changes in this area; additional docs required
when full project complete.
      2dbbda02
      History
      Reduce lock levels of CREATE TRIGGER and some ALTER TABLE, CREATE RULE actions.
      Simon Riggs authored 
      Avoid hard-coding lockmode used for many altering DDL commands, allowing easier
future changes of lock levels. Implementation of initial analysis on DDL
sub-commands, so that many lock levels are now at ShareUpdateExclusiveLock or
ShareRowExclusiveLock, allowing certain DDL not to block reads/writes.
First of number of planned changes in this area; additional docs required
when full project complete.