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体验新版 GitCode,发现更多精彩内容 >>
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7f61f8a7
编写于
7月 21, 1998
作者:
B
Bruce Momjian
浏览文件
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src/tools/backend/index.html
src/tools/backend/index.html
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src/tools/backend/index.html
浏览文件 @
7f61f8a7
...
...
@@ -10,7 +10,39 @@ How PostgreSQL Processes a Query
by Bruce Momjian
</H2>
<P>
<CENTER>
<EM><BIG>
Click on an item to see more detail or look at the full
<A
HREF=
"backend_dirs.html"
>
index.
</A>
</BIG></EM>
<BR>
<BR>
<IMG
src=
"flow.jpg"
usemap=
"#flowmap"
alt=
"flowchart"
>
</CENTER>
<MAP
name=
"flowmap"
>
<AREA
COORDS=
"290,10,450,50"
HREF=
"backend_dirs.html#main"
>
<AREA
COORDS=
"550,10,710,50"
HREF=
"backend_dirs.html#bootstrap"
>
<AREA
COORDS=
"290,90,450,130,"
HREF=
"backend_dirs.html#postmaster"
>
<AREA
COORDS=
"550,90,710,130,"
HREF=
"backend_dirs.html#libpq"
>
<AREA
COORDS=
"290,170,450,210"
HREF=
"backend_dirs.html#tcop"
>
<AREA
COORDS=
"550,170,710,210"
HREF=
"backend_dirs.html#tcop"
>
<AREA
COORDS=
"290,270,450,310"
HREF=
"backend_dirs.html#parser"
>
<AREA
COORDS=
"290,350,450,390"
HREF=
"backend_dirs.html#tcop"
>
<AREA
COORDS=
"290,430,450,470"
HREF=
"backend_dirs.html#optimizer"
>
<AREA
COORDS=
"290,510,450,550"
HREF=
"backend_dirs.html#optimizer/plan"
>
<AREA
COORDS=
"290,570,450,630"
HREF=
"backend_dirs.html#executor"
>
<AREA
COORDS=
"550,350,710,390"
HREF=
"backend_dirs.html#commands"
>
<AREA
COORDS=
"10,330,170,370"
HREF=
"backend_dirs.html#access"
>
<AREA
COORDS=
"10,390,170,430"
HREF=
"backend_dirs.html#catalog"
>
<AREA
COORDS=
"10,450,170,490"
HREF=
"backend_dirs.html#utils"
>
<AREA
COORDS=
"10,510,170,550"
HREF=
"backend_dirs.html#nodes"
>
<AREA
COORDS=
"10,570,170,610"
HREF=
"backend_dirs.html#storage"
>
</MAP>
<BR>
<P>
<HR>
<P>
A query comes to the backend via data packets arriving through TCP/IP
or Unix Domain sockets. It is loaded into a string, and passed to
the
...
...
@@ -87,40 +119,6 @@ They can be accessed by clicking on the flowchart.
<HR>
<P>
<CENTER>
<EM><BIG>
Click on an item to see more detail or look at the full
<A
HREF=
"backend_dirs.html"
>
index.
</A>
</BIG></EM>
<BR>
<BR>
<IMG
src=
"flow.jpg"
usemap=
"#flowmap"
alt=
"flowchart"
>
</CENTER>
<MAP
name=
"flowmap"
>
<AREA
COORDS=
"290,10,450,50"
HREF=
"backend_dirs.html#main"
>
<AREA
COORDS=
"550,10,710,50"
HREF=
"backend_dirs.html#bootstrap"
>
<AREA
COORDS=
"290,90,450,130,"
HREF=
"backend_dirs.html#postmaster"
>
<AREA
COORDS=
"550,90,710,130,"
HREF=
"backend_dirs.html#libpq"
>
<AREA
COORDS=
"290,170,450,210"
HREF=
"backend_dirs.html#tcop"
>
<AREA
COORDS=
"550,170,710,210"
HREF=
"backend_dirs.html#tcop"
>
<AREA
COORDS=
"290,270,450,310"
HREF=
"backend_dirs.html#parser"
>
<AREA
COORDS=
"290,350,450,390"
HREF=
"backend_dirs.html#tcop"
>
<AREA
COORDS=
"290,430,450,470"
HREF=
"backend_dirs.html#optimizer"
>
<AREA
COORDS=
"290,510,450,550"
HREF=
"backend_dirs.html#optimizer/plan"
>
<AREA
COORDS=
"290,570,450,630"
HREF=
"backend_dirs.html#executor"
>
<AREA
COORDS=
"550,350,710,390"
HREF=
"backend_dirs.html#commands"
>
<AREA
COORDS=
"10,330,170,370"
HREF=
"backend_dirs.html#access"
>
<AREA
COORDS=
"10,390,170,430"
HREF=
"backend_dirs.html#catalog"
>
<AREA
COORDS=
"10,450,170,490"
HREF=
"backend_dirs.html#utils"
>
<AREA
COORDS=
"10,510,170,550"
HREF=
"backend_dirs.html#nodes"
>
<AREA
COORDS=
"10,570,170,610"
HREF=
"backend_dirs.html#storage"
>
</MAP>
<BR>
<P>
<HR>
<P>
Another area of interest is the shared memory area, which contains data
accessable to all backends. It has table recently used data/index
blocks, locks, backend information, and lookup tables for these
...
...
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