pike.git/ lib/ modules/ Sql.pmod/ pgsql_util.pmod

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2020-05-18

2020-05-18 17:16:31 by Stephen R. van den Berg <srb@cuci.nl>

pgsql: Speed up resync().

110:   private Regexp paralleliseprefix    = iregexp("^\a*((SELEC|INSER)T|(UPDA|DELE)TE|(FETC|WIT)H)\a");    -  /* Statements matching transbeginprefix will cause the driver +  /* Statements matching transbeginprefix will cause the driver to    * insert a sync after the statement.    * Failure to do so, will result in portal synchronisation errors    * in the event of an ErrorResponse.
118:   final Regexp transbeginprefix    = iregexp("^\a*(BEGIN|START)([; \t\f\r\n]|$)");    -  /* Statements matching transendprefix will cause the driver +  /* Statements matching transendprefix will cause the driver to    * insert a sync after the statement.    * Failure to do so, will result in portal synchronisation errors    * in the event of an ErrorResponse.
126:   final Regexp transendprefix    = iregexp("^\a*(COMMIT|ROLLBACK|END)([; \t\f\r\n]|$)");    +  /* Statements matching nodataresprefix will cause the driver +  * to skip asking for a query description and query results, since there +  * are no arguments or results to begin with. +  */ + final Regexp nodataresprefix +  = iregexp("^\a*(RESET|CLOSE|DISCARD)\a"); +     /* For statements matching execfetchlimit the resultrows will not be    * fetched in pieces. This heuristic will be sub-optimal whenever    * either an UPDATE/DELETE/INSERT statement is prefixed by WITH, or
139:    * tradeoff.    */   private Regexp execfetchlimit -  = iregexp("^\a*((UPDA|DELE)TE|INSERT" +  = iregexp("^\a*((UPDA|DELE)TE|INSERT|CREATE|DROP"    "|RESET|CLOSE|DISCARD)\a|\aLIMIT\a+[1-9][; \t\f\r\n]*$");      private void default_backend_runs() { // Runs as soon as the