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  • Committer: Evan Jones
  • Date: 2011-01-02 18:30:08 UTC
  • mto: (2055.1.2 build)
  • mto: This revision was merged to the branch mainline in revision 2056.
  • Revision ID: evanj@mit.edu-20110102183008-ytvoaig5zxdck3d5
libdrizzle: drizzle_state_read: only call recv() if data is available.

This uses the "read ready" flag that already exists to avoid excess system calls. Without this patch, in non-blocking mode after sending a command, libdrizzle immediately calls recv(), which almost always returns EAGAIN. This patch avoids that, instead returning IO_WAIT. This causes the caller to wait for data on the connection using poll() or epoll() before calling recv().

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drizzled/statement/replace_select.h
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class ReplaceSelect : public Statement
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{
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public:
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  ReplaceSelect(Session *in_session) :
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    Statement(in_session)
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  {
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    getSession()->getLex()->sql_command= SQLCOM_REPLACE_SELECT;
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  }
 
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  ReplaceSelect(Session *in_session)
 
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    :
 
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      Statement(in_session)
 
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  {}
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  bool execute();
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  bool isTransactional()
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  {
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    return true;
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  }
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};
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} /* namespace statement */