I came across this operator := in a postgresql function:
searchsql:= searchsql || ' WHERE 1=1 ' ;
I googled but cannot find the answer, what does it mean?
:= sql operator in pgsql function
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:=is the assignment operator in PL/pgSQLThe expression
appends the string
' WHERE 1=1 'to the current value of the variablesearchsqlSee the manual for details:
http://www.postgresql.org/docs/current/static/plpgsql-statements.html#PLPGSQL-STATEMENTS-ASSIGNMENT