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Hongze Zhang edited comment on CALCITE-2791 at 2/19/19 5:15 AM: ---------------------------------------------------------------- [~x1q1j1], Did you intent to use values('\{"a": [10, true]}')? The picture you putĀ above shows what you tested is values('\{"a": "[10, true]"}'). You can use strict syntax of JSON_VALUE to see the error message. E.g. {code:java} SELECT JSON_VALUE(v, 'strict $.a[0]' ERROR ON ERROR) FROM (VALUES ('{"a": "[10, true]"}')) AS t(v); {code} It will give you something like {code:java} Filter: [0] can only be applied to arrays. Current context is: [10, true] {code} was (Author: zhztheplayer): [~x1q1j1], Did you intent to use values('{"a": [10, true]}')? The picture you putĀ above shows what you tested is values('{"a": "[10, true]"}'). You can use strict syntax of JSON_VALUE to see the error message. E.g. {code:java} SELECT JSON_VALUE(v, 'strict $.a[0]' ERROR ON ERROR) FROM (VALUES ('{"a": "[10, true]"}')) AS t(v); {code} It will give you something like {code:java} Filter: [0] can only be applied to arrays. Current context is: [10, true] {code} > Add the JSON_TYPE function > -------------------------- > > Key: CALCITE-2791 > URL: https://issues.apache.org/jira/browse/CALCITE-2791 > Project: Calcite > Issue Type: Improvement > Components: core > Reporter: Forward Xu > Assignee: Julian Hyde > Priority: Major > Labels: pull-request-available > Attachments: image-2019-02-19-12-24-10-200.png > > Time Spent: 0.5h > Remaining Estimate: 0h > > The data in json can be =, <, <=, >, >=, <>,! =, and <=>. But the data types > in json can be diverse, so when you compare different types, you have a > priority, and the high priority is greater than the low priority (you can > view the types with the JSON_TYPE() function). The priorities are as follows: > BOOLEAN,ARRAY,OBJECT,STRING,INTEGE,DOUBLE,NULL > Example Data: > {"a":[10,true]} > SELECT JSON_TYPE(v) AS c1, > JSON_TYPE(a) AS c2, > JSON_TYPE(b) AS c3, > JSON_TYPE(c) AS c4 FROM (VALUES ('\{"a": [10, true]}','[10, true]', '10', > 'true')) AS t(v, a, b, c) > limit 10; > c1 c2 c3 c4 > ======= ======= ======= ======= > OBJECT ARRAY INTEGER BOOLEAN -- This message was sent by Atlassian JIRA (v7.6.3#76005)