put constant from select to insert into field Posgresql

In code line 14   i want to put table name into  field   filname   but this code put all column in each row to filed  filname  how cani fixit

sc_lookup(Dataset, "SELECT  tablename FROM pg_catalog.pg_tables
where schemaname = 'public'and tablename not like 'pong8%' order by tablename") ;

{TabName} = {Dataset[33][0]};

$table = {TabName} ;
echo "$table";

$sql ='INSERT INTO pong8_maintable ("filname","timestamp8","Last","TradePrice", "TradeVolume" , "BestBid", "BidSize", "BestAsk","AskSize" ,"Turnover" ,"CalcVWAP" ,"Flow" ,"TradeFlags"

) 

SELECT
'.$table.' ,
cast(public.'.$table.'."Timestamp" as timestamp) ,
cast(public.'.$table.'."Last" as numeric)  ,
cast(public.'.$table.'."Trade Price" as numeric)  ,  
cast(public.'.$table.'."Trade Volume" as numeric),
cast(public.'.$table.'."Best Bid" as numeric),
cast(public.'.$table.'."Bid Size"as numeric),
cast(public.'.$table.'."Best Ask"as numeric),
cast(public.'.$table.'."Ask Size"as numeric),
cast(public.'.$table.'."Turnover"as numeric),
cast(public.'.$table.'."Calc VWAP"as numeric),
cast(public.'.$table.'."Flow"as numeric),
cast(public.'.$table.'."Trade Flags"as varchar)

FROM Public.'.{TabName}; 


sc_exec_sql($sql);

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