Vova Vysotskyi created CALCITE-4450:
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Summary: Query on ElasticSearch table that projects varchar
literal fails with JsonParseException
Key: CALCITE-4450
URL: https://issues.apache.org/jira/browse/CALCITE-4450
Project: Calcite
Issue Type: Bug
Affects Versions: 1.26.0
Reporter: Vova Vysotskyi
Assignee: Vova Vysotskyi
A query that contains varchar literals in projection fails for ElasticSearch
adapter. Simple test case to reproduce the issue:
{code:java}
@Test void projectionStringLiteral() {
CalciteAssert.that()
.with(newConnectionFactory())
.query(
String.format(Locale.ROOT, "select 'foo' as \"lit\"\n"
+ "from \"elastic\".\"%s\"", NAME))
.returns("lit=foo\n");
}
{code}
Error:
{noformat}
Caused by: com.fasterxml.jackson.core.JsonParseException: Unexpected character
('f' (code 102)): was expecting comma to separate Object entries
at [Source: (String)"{"script_fields": {"lit":{"script": ""foo""},
"a":{"script": "params._source.a"}}}"; line: 1, column: 40]
at
com.fasterxml.jackson.core.JsonParser._constructError(JsonParser.java:1840)
{noformat}
The problem is that {{RexToElasticsearchTranslator.visitLiteral}} method do not
escape literal quotes, and forms the following string: {{"lit":""foo""}} that
cannot be handled by jackson.
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