wuchong commented on a change in pull request #11186: [FLINK-16200][sql]
Support JSON_EXISTS for blink planner
URL: https://github.com/apache/flink/pull/11186#discussion_r399163331
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File path:
flink-table/flink-table-planner-blink/src/test/scala/org/apache/flink/table/planner/expressions/JsonFunctionsTest.scala
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@@ -125,4 +127,53 @@ class JsonFunctionsTest extends ExpressionTestBase {
}
}
+ @Test
+ def testJsonExists(): Unit = {
+ testSqlApi("json_exists('{\"foo\":\"bar\"}', "
+ + "'strict $.foo' false on error)", "true")
+ testSqlApi("json_exists('{\"foo\":\"bar\"}', "
+ + "'strict $.foo' true on error)", "true")
+ testSqlApi("json_exists('{\"foo\":\"bar\"}', "
+ + "'strict $.foo' unknown on error)", "true")
+ testSqlApi("json_exists('{\"foo\":\"bar\"}', "
+ + "'lax $.foo' false on error)", "true")
+ testSqlApi("json_exists('{\"foo\":\"bar\"}', "
+ + "'lax $.foo' true on error)", "true")
+ testSqlApi("json_exists('{\"foo\":\"bar\"}', "
+ + "'lax $.foo' unknown on error)", "true")
+ testSqlApi("json_exists('{}', "
+ + "'invalid $.foo' false on error)", "false")
+ testSqlApi("json_exists('{}', "
+ + "'invalid $.foo' true on error)", "true")
+ testSqlApi("json_exists('{}', "
+ + "'invalid $.foo' unknown on error)", "null")
+ testSqlApi("json_exists(cast('{\"foo\":\"bar\"}' as varchar), "
+ + "'strict $.foo1')", "false")
+
+ // not exists
+ testSqlApi("json_exists('{\"foo\":\"bar\"}', "
+ + "'strict $.foo1' false on error)", "false")
+ testSqlApi("json_exists('{\"foo\":\"bar\"}', "
+ + "'strict $.foo1' true on error)", "true")
+ testSqlApi("json_exists('{\"foo\":\"bar\"}', "
+ + "'strict $.foo1' unknown on error)", "null")
+ testSqlApi("json_exists('{\"foo\":\"bar\"}', "
+ + "'lax $.foo1' true on error)", "false")
+ testSqlApi("json_exists('{\"foo\":\"bar\"}', "
+ + "'lax $.foo1' false on error)", "false")
+ testSqlApi("json_exists('{\"foo\":\"bar\"}', "
+ + "'lax $.foo1' error on error)", "false")
+ testSqlApi("json_exists('{\"foo\":\"bar\"}', "
+ + "'lax $.foo1' unknown on error)", "false")
+
+ // nulls
+ testSqlApi("json_exists(cast(null as varchar), 'lax $' unknown on error)",
"null")
+ }
+
+ @Test
+ def testJsonFuncError(): Unit = {
+ expectedException.expect(classOf[CodeGenException])
+ expectedException.expectMessage(startsWith("Unsupported call:
JSON_EXISTS"))
Review comment:
This exception message is still misleading. We already support
`JSON_EXISTS`, why the exception says not? I think we should improve the
exception to give a better understandable message, e.g. `the json path 'lax $'
is illegal.`
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