help ! Is having likely function charindex of mssql in postgresql?

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 hello:
      In my project ,i want to test which is more effective between 'like'
and charindex .but i can't find it in postgresql.Could you help find it
like this.
   thanx
                                                            eagle from
china 
 
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<DIV>&nbsp;</DIV>
<DIV>&nbsp;</DIV>
<DIV>&nbsp;</DIV>
<DIV>&nbsp;hello:</DIV>
<DIV>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; In my project ,i want to&nbsp;test
which&nbsp;is more effective between&nbsp;'like' and charindex .but i
can't find it in postgresql.Could you help find it like this.</DIV>
<DIV>&nbsp;&nbsp; thanx</DIV>
<DIV>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;eagle
from china </DIV>
<DIV>&nbsp;</DIV>
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