Question:
I have a list of json objects (result attribute) as in the example :
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select result from mytable limit 1 |
I get :
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[{hop=1, error=null, result=[{x=null, from=192.168.0.1, rtt=0.378, ttl=64, err=null, ittl=null, edst=null, late=null, mtu=null, size=68, flags=null, dstoptsize=null, hbhoptsize=null, icmpext=null}, {x=null, from=192.168.0.1, rtt=0.314, ttl=64, err=null, ittl=null, edst=null, late=null, mtu=null, size=68, flags=null, dstoptsize=null, hbhoptsize=null, icmpext=null}, {x=null, from=192.168.0.1, rtt=0.303, ttl=64, err=null, ittl=null, edst=null, late=null, mtu=null, size=68, flags=null, dstoptsize=null, hbhoptsize=null, icmpext=null}]}, {hop=2, error=null, result=[{x=null, from=71.120.7.1, rtt=8.135, ttl=254, err=null, ittl=null, edst=null, late=null, mtu=null, size=28, flags=null, dstoptsize=null, hbhoptsize=null, icmpext=null}, {x=null, from=71.120.7.1, rtt=0.769, ttl=254, err=null, ittl=null, edst=null, late=null, mtu=null, size=28, flags=null, dstoptsize=null, hbhoptsize=null, icmpext=null}, {x=null, from=71.120.7.1, rtt=0.761, ttl=254, err=null, ittl=null, edst=null, late=null, mtu=null, size=28, flags=null, dstoptsize=null, hbhoptsize=null, icmpext=null}]}, {hop=3, error=null, result=[{x=null, from=100.41.136.160, rtt=5.583, ttl=253, err=null, ittl=null, edst=null, late=null, mtu=null, size=68, flags=null, dstoptsize=null, hbhoptsize=null, icmpext=null}, {x=null, from=100.41.136.160, rtt=1.749, ttl=253, err=null, ittl=null, edst=null, late=null, mtu=null, size=68, flags=null, dstoptsize=null, hbhoptsize=null, icmpext=null}, {x=null, from=100.41.136.160, rtt=1.805, ttl=253, err=null, ittl=null, edst=null, late=null, mtu=null, size=68, flags=null, dstoptsize=null, hbhoptsize=null, icmpext=null}]}, {hop=4, error=null, result=[{x=*, from=null, rtt=null, ttl=null, err=null, ittl=null, edst=null, late=null, mtu=null, size=null, flags=null, dstoptsize=null, hbhoptsize=null, icmpext=null}, {x=*, from=null, rtt=null, ttl=null, err=null, ittl=null, edst=null, late=null, mtu=null, size=null, flags=null, dstoptsize=null, hbhoptsize=null, icmpext=null}, {x=*, from=null, rtt=null, ttl=null, err=null, ittl=null, edst=null, late=null, mtu=null, size=null, flags=null, dstoptsize=null, hbhoptsize=null, icmpext=null}]}, {hop=5, error=null, result=[{x=null, from=140.222.239.91, rtt=3.121, ttl=251, err=null, ittl=null, edst=null, late=null, mtu=null, size=28, flags=null, dstoptsize=null, hbhoptsize=null, icmpext=null}, {x=null, from=140.222.239.91, rtt=2.984, ttl=251, err=null, ittl=null, edst=null, late=null, mtu=null, size=28, flags=null, dstoptsize=null, hbhoptsize=null, icmpext=null}, {x=null, from=140.222.239.91, rtt=3.0, ttl=251, err=null, ittl=null, edst=null, late=null, mtu=null, size=28, flags=null, dstoptsize=null, hbhoptsize=null, icmpext=null}]}, {hop=6, error=null, result=[{x=*, from=null, rtt=null, ttl=null, err=null, ittl=null, edst=null, late=null, mtu=null, size=null, flags=null, dstoptsize=null, hbhoptsize=null, icmpext=null}, {x=*, from=null, rtt=null, ttl=null, err=null, ittl=null, edst=null, late=null, mtu=null, size=null, flags=null, dstoptsize=null, hbhoptsize=null, icmpext=null}, {x=*, from=null, rtt=null, ttl=null, err=null, ittl=null, edst=null, late=null, mtu=null, size=null, flags=null, dstoptsize=null, hbhoptsize=null, icmpext=null}]}, {hop=7, error=null, result=[{x=null, from=4.69.153.150, rtt=100.718, ttl=244, err=null, ittl=null, edst=null, late=null, mtu=null, size=28, flags=null, dstoptsize=null, hbhoptsize=null, icmpext=null}, {x=null, from=4.69.153.150, rtt=100.748, ttl=244, err=null, ittl=null, edst=null, late=null, mtu=null, size=28, flags=null, dstoptsize=null, hbhoptsize=null, icmpext=null}, {x=null, from=4.69.153.150, rtt=100.708, ttl=244, err=null, ittl=null, edst=null, late=null, mtu=null, size=28, flags=null, dstoptsize=null, hbhoptsize=null, icmpext=null}]}, {hop=8, error=null, result=[{x=null, from=212.73.203.18, rtt=101.694, ttl=244, err=null, ittl=null, edst=null, late=null, mtu=null, size=68, flags=null, dstoptsize=null, hbhoptsize=null, icmpext=null}, {x=null, from=212.73.203.18, rtt=101.954, ttl=244, err=null, ittl=null, edst=null, late=null, mtu=null, size=68, flags=null, dstoptsize=null, hbhoptsize=null, icmpext=null}, {x=null, from=212.73.203.18, rtt=101.721, ttl=244, err=null, ittl=null, edst=null, late=null, mtu=null, size=68, flags=null, dstoptsize=null, hbhoptsize=null, icmpext=null}]}, {hop=9, error=null, result=[{x=null, from=193.171.23.41, rtt=101.096, ttl=244, err=null, ittl=null, edst=null, late=null, mtu=null, size=28, flags=null, dstoptsize=null, hbhoptsize=null, icmpext=null}, {x=null, from=193.171.23.41, rtt=101.132, ttl=244, err=null, ittl=null, edst=null, late=null, mtu=null, size=28, flags=null, dstoptsize=null, hbhoptsize=null, icmpext=null}, {x=null, from=193.171.23.41, rtt=101.115, ttl=244, err=null, ittl=null, edst=null, late=null, mtu=null, size=28, flags=null, dstoptsize=null, hbhoptsize=null, icmpext=null}]}, {hop=10, error=null, result=[{x=null, from=193.170.114.242, rtt=101.884, ttl=56, err=null, ittl=null, edst=null, late=null, mtu=null, size=40, flags=null, dstoptsize=null, hbhoptsize=null, icmpext=null}, {x=null, from=193.170.114.242, rtt=101.695, ttl=56, err=null, ittl=null, edst=null, late=null, mtu=null, size=40, flags=null, dstoptsize=null, hbhoptsize=null, icmpext=null}, {x=null, from=193.170.114.242, rtt=100.881, ttl=56, err=null, ittl=null, edst=null, late=null, mtu=null, size=40, flags=null, dstoptsize=null, hbhoptsize=null, icmpext=null}]}] |
I try to get this attribute as json object (without “=”) so I can use the results in my application that take only json data.
I try the function cast (myattribute as json) :
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select cast (result as json) from mytable limit 1 |
But, I get :
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[[1,null,[[null,"192.168.0.1",0.378,64,null,null,null,null,null,null,68,null,null,null,null],[null,"192.168.0.1",0.314,64,null,null,null,null,null,null,68,null,null,null,null],[null,"192.168.0.1",0.303,64,null,null,null,null,null,null,68,null,null,null,null]]],[2,null,[[null,"71.120.7.1",8.135,254,null,null,null,null,null,null,28,null,null,null,null],[null,"71.120.7.1",0.769,254,null,null,null,null,null,null,28,null,null,null,null],[null,"71.120.7.1",0.761,254,null,null,null,null,null,null,28,null,null,null,null]]],[3,null,[[null,"100.41.136.160",5.583,253,null,null,null,null,null,null,68,null,null,null,null],[null,"100.41.136.160",1.749,253,null,null,null,null,null,null,68,null,null,null,null],[null,"100.41.136.160",1.805,253,null,null,null,null,null,null,68,null,null,null,null]]],[4,null,[["*",null,null,null,"*",null,null,null,null,null,null,null,null,null,null],["*",null,null,null,"*",null,null,null,null,null,null,null,null,null,null],["*",null,null,null,"*",null,null,null,null,null,null,null,null,null,null]]],[5,null,[[null,"140.222.239.91",3.121,251,null,null,null,null,null,null,28,null,null,null,null],[null,"140.222.239.91",2.984,251,null,null,null,null,null,null,28,null,null,null,null],[null,"140.222.239.91",3.0,251,null,null,null,null,null,null,28,null,null,null,null]]],[6,null,[["*",null,null,null,"*",null,null,null,null,null,null,null,null,null,null],["*",null,null,null,"*",null,null,null,null,null,null,null,null,null,null],["*",null,null,null,"*",null,null,null,null,null,null,null,null,null,null]]],[7,null,[[null,"4.69.153.150",100.718,244,null,null,null,null,null,null,28,null,null,null,null],[null,"4.69.153.150",100.748,244,null,null,null,null,null,null,28,null,null,null,null],[null,"4.69.153.150",100.708,244,null,null,null,null,null,null,28,null,null,null,null]]],[8,null,[[null,"212.73.203.18",101.694,244,null,null,null,null,null,null,68,null,null,null,null],[null,"212.73.203.18",101.954,244,null,null,null,null,null,null,68,null,null,null,null],[null,"212.73.203.18",101.721,244,null,null,null,null,null,null,68,null,null,null,null]]],[9,null,[[null,"193.171.23.41",101.096,244,null,null,null,null,null,null,28,null,null,null,null],[null,"193.171.23.41",101.132,244,null,null,null,null,null,null,28,null,null,null,null],[null,"193.171.23.41",101.115,244,null,null,null,null,null,null,28,null,null,null,null]]],[10,null,[[null,"193.170.114.242",101.884,56,null,null,null,null,null,null,40,null,null,null,null],[null,"193.170.114.242",101.695,56,null,null,null,null,null,null,40,null,null,null,null],[null,"193.170.114.242",100.881,56,null,null,null,null,null,null,40,null,null,null,null]]]] |
As you see, the keys are omitted !
Any help?
Answer:
That’s because it’s stored as a ROW type field and not JSON. You can access the different keys by doing
select field.key from table
You can check more about it in here