Add exp(), ln(), and some other functions to numeric-functions table.
Add exp(), ln(), and some other functions to numeric-functions table.

royc1/gpdb,Quikling/gpdb,lisakowen/gpdb,CraigHarris/gpdb,jmcatamney/gpdb,foyzur/gpdb,Quikling/gpdb,edespino/gpdb,Quikling/gpdb,Chibin/gpdb,zeroae/postgres-xl,pavanvd/postgres-xl,lpetrov-pivotal/gpdb,kmjungersen/PostgresXL,rubikloud/gpdb,lintzc/gpdb,royc1/gpdb,lintzc/gpdb,50wu/gpdb,xinzweb/gpdb,postmind-net/postgres-xl,ahachete/gpdb,zaksoup/gpdb,0x0FFF/gpdb,rvs/gpdb,tpostgres-projects/tPostgres,lpetrov-pivotal/gpdb,lintzc/gpdb,atris/gpdb,foyzur/gpdb,tangp3/gpdb,randomtask1155/gpdb,ahachete/gpdb,Postgres-XL/Postgres-XL,Chibin/gpdb,xuegang/gpdb,arcivanov/postgres-xl,tangp3/gpdb,foyzur/gpdb,0x0FFF/gpdb,yuanzhao/gpdb,ashwinstar/gpdb,snaga/postgres-xl,randomtask1155/gpdb,xuegang/gpdb,greenplum-db/gpdb,rubikloud/gpdb,edespino/gpdb,zaksoup/gpdb,lisakowen/gpdb,jmcatamney/gpdb,tpostgres-projects/tPostgres,cjcjameson/gpdb,atris/gpdb,ovr/postgres-xl,cjcjameson/gpdb,Quikling/gpdb,postmind-net/postgres-xl,tangp3/gpdb,xinzweb/gpdb,CraigHarris/gpdb,yuanzhao/gpdb,cjcjameson/gpdb,greenplum-db/gpdb,yuanzhao/gpdb,arcivanov/postgres-xl,rubikloud/gpdb,xuegang/gpdb,Quikling/gpdb,lisakowen/gpdb,zaksoup/gpdb,lintzc/gpdb,tangp3/gpdb,yazun/postgres-xl,xinzweb/gpdb,lintzc/gpdb,zaksoup/gpdb,rvs/gpdb,ahachete/gpdb,lisakowen/gpdb,pavanvd/postgres-xl,ahachete/gpdb,50wu/gpdb,ovr/postgres-xl,CraigHarris/gpdb,techdragon/Postgres-XL,adam8157/gpdb,arcivanov/postgres-xl,kmjungersen/PostgresXL,kaknikhil/gpdb,edespino/gpdb,tangp3/gpdb,Chibin/gpdb,jmcatamney/gpdb,snaga/postgres-xl,CraigHarris/gpdb,ashwinstar/gpdb,ashwinstar/gpdb,xuegang/gpdb,atris/gpdb,Chibin/gpdb,xuegang/gpdb,adam8157/gpdb,Quikling/gpdb,janebeckman/gpdb,arcivanov/postgres-xl,foyzur/gpdb,tpostgres-projects/tPostgres,Chibin/gpdb,lintzc/gpdb,kaknikhil/gpdb,adam8157/gpdb,lpetrov-pivotal/gpdb,chrishajas/gpdb,zaksoup/gpdb,xinzweb/gpdb,kaknikhil/gpdb,rvs/gpdb,chrishajas/gpdb,ahachete/gpdb,zeroae/postgres-xl,cjcjameson/gpdb,xinzweb/gpdb,rubikloud/gpdb,xinzweb/gpdb,greenplum-db/gpdb,foyzur/gpdb,randomtask1155/gpdb,rubikloud/gpdb,techdragon/Postgres-XL,zaksoup/gpdb,atris/gpdb,randomtask1155/gpdb,0x0FFF/gpdb,cjcjameson/gpdb,atris/gpdb,edespino/gpdb,cjcjameson/gpdb,yazun/postgres-xl,foyzur/gpdb,janebeckman/gpdb,rvs/gpdb,cjcjameson/gpdb,Postgres-XL/Postgres-XL,greenplum-db/gpdb,ashwinstar/gpdb,rvs/gpdb,zeroae/postgres-xl,0x0FFF/gpdb,Postgres-XL/Postgres-XL,ovr/postgres-xl,royc1/gpdb,oberstet/postgres-xl,techdragon/Postgres-XL,ashwinstar/gpdb,janebeckman/gpdb,techdragon/Postgres-XL,greenplum-db/gpdb,edespino/gpdb,arcivanov/postgres-xl,edespino/gpdb,postmind-net/postgres-xl,yuanzhao/gpdb,tangp3/gpdb,rvs/gpdb,lpetrov-pivotal/gpdb,atris/gpdb,kaknikhil/gpdb,xinzweb/gpdb,royc1/gpdb,edespino/gpdb,zeroae/postgres-xl,randomtask1155/gpdb,50wu/gpdb,CraigHarris/gpdb,greenplum-db/gpdb,royc1/gpdb,tangp3/gpdb,jmcatamney/gpdb,janebeckman/gpdb,Chibin/gpdb,pavanvd/postgres-xl,50wu/gpdb,yuanzhao/gpdb,techdragon/Postgres-XL,CraigHarris/gpdb,lintzc/gpdb,chrishajas/gpdb,lisakowen/gpdb,lintzc/gpdb,edespino/gpdb,tpostgres-projects/tPostgres,adam8157/gpdb,chrishajas/gpdb,pavanvd/postgres-xl,yuanzhao/gpdb,janebeckman/gpdb,oberstet/postgres-xl,yazun/postgres-xl,0x0FFF/gpdb,janebeckman/gpdb,xinzweb/gpdb,yazun/postgres-xl,snaga/postgres-xl,kaknikhil/gpdb,postmind-net/postgres-xl,adam8157/gpdb,Quikling/gpdb,adam8157/gpdb,CraigHarris/gpdb,kaknikhil/gpdb,lpetrov-pivotal/gpdb,royc1/gpdb,ovr/postgres-xl,chrishajas/gpdb,50wu/gpdb,Quikling/gpdb,ahachete/gpdb,jmcatamney/gpdb,kaknikhil/gpdb,Postgres-XL/Postgres-XL,Chibin/gpdb,50wu/gpdb,tpostgres-projects/tPostgres,ovr/postgres-xl,postmind-net/postgres-xl,yuanzhao/gpdb,janebeckman/gpdb,cjcjameson/gpdb,jmcatamney/gpdb,kmjungersen/PostgresXL,lisakowen/gpdb,xuegang/gpdb,adam8157/gpdb,atris/gpdb,0x0FFF/gpdb,chrishajas/gpdb,rvs/gpdb,snaga/postgres-xl,chrishajas/gpdb,oberstet/postgres-xl,chrishajas/gpdb,lpetrov-pivotal/gpdb,yazun/postgres-xl,lisakowen/gpdb,lisakowen/gpdb,50wu/gpdb,kaknikhil/gpdb,yuanzhao/gpdb,kmjungersen/PostgresXL,royc1/gpdb,Chibin/gpdb,lintzc/gpdb,zaksoup/gpdb,cjcjameson/gpdb,foyzur/gpdb,janebeckman/gpdb,lpetrov-pivotal/gpdb,foyzur/gpdb,greenplum-db/gpdb,50wu/gpdb,rubikloud/gpdb,Postgres-XL/Postgres-XL,0x0FFF/gpdb,jmcatamney/gpdb,randomtask1155/gpdb,ashwinstar/gpdb,royc1/gpdb,pavanvd/postgres-xl,adam8157/gpdb,ashwinstar/gpdb,janebeckman/gpdb,xuegang/gpdb,Chibin/gpdb,janebeckman/gpdb,cjcjameson/gpdb,zeroae/postgres-xl,Quikling/gpdb,ahachete/gpdb,lpetrov-pivotal/gpdb,ahachete/gpdb,yuanzhao/gpdb,kaknikhil/gpdb,zaksoup/gpdb,rvs/gpdb,Chibin/gpdb,yuanzhao/gpdb,0x0FFF/gpdb,rubikloud/gpdb,randomtask1155/gpdb,edespino/gpdb,randomtask1155/gpdb,CraigHarris/gpdb,kmjungersen/PostgresXL,arcivanov/postgres-xl,tangp3/gpdb,rvs/gpdb,edespino/gpdb,oberstet/postgres-xl,xuegang/gpdb,kaknikhil/gpdb,snaga/postgres-xl,jmcatamney/gpdb,rvs/gpdb,ashwinstar/gpdb,xuegang/gpdb,rubikloud/gpdb,oberstet/postgres-xl,greenplum-db/gpdb,atris/gpdb,Quikling/gpdb,CraigHarris/gpdb