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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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Lines of Context:
tests/t/truncate.test
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select * from t1;
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drop table t1;
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# The following should fail
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--error ER_TABLE_UNKNOWN
 
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--error ER_NO_SUCH_TABLE
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select count(*) from t1;
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create temporary table t1 (n int);
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insert into t1 values (1),(2),(3);
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truncate table t1;
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select * from t1;
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drop table t1;
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--error ER_TABLE_UNKNOWN
 
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--error ER_NO_SUCH_TABLE
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truncate non_existing_table;
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#