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https://issues.apache.org/jira/browse/CALCITE-6142?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17790897#comment-17790897
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Benchao Li commented on CALCITE-6142:
-------------------------------------
{{SqlDialect}} is now mainly used for rel2sql, not sql2rel. To config the
Parser behavior, you can directly configure {{SqlParser.Config}}, e.g.
{{withQuoting(Quoting.DOUBLE_QUOTE_BACKSLASH)}}.
> Double quote does not work as literal quote string in sql parsing
> -----------------------------------------------------------------
>
> Key: CALCITE-6142
> URL: https://issues.apache.org/jira/browse/CALCITE-6142
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.32.0, 1.36.0
> Reporter: peng wu
> Priority: Critical
>
> When tried to parse spark sql express where double quote(") as literal quote
> string, calcite sql parser threw an exception:
> org.apache.calcite.sql.parser.impl.ParseException: Encountered "\"" at
> line 1, column 26.
> Was expecting one of:
> "ABS" ...
> "ARRAY" ... "AVG" ...
> The literal quote string is specified in sql parser config.
> Here is my test case:
> {code:java}
> public static void main(String[] args) throws Exception {
> String sqlQuery = "case when `Area` in ( \"Region1\", \"Region2\",
> \"Region3\" ) then `Sales` else null end";
> //create spark dialect
> SqlDialect.Context context = SqlDialect.EMPTY_CONTEXT
> .withDatabaseProduct(SqlDialect.DatabaseProduct.SPARK)
> .withUnquotedCasing(Casing.UNCHANGED)
> .withNullCollation(NullCollation.LOW)
> .withIdentifierQuoteString("`")
> .withLiteralQuoteString("\"");
> SqlDialect sparkDialect = new SparkSqlDialect(context);
> SqlParser.Config config =
> sparkDialect.configureParser(SqlParser.config());
> // Create an SQL parser
> SqlParser parser = SqlParser.create(sqlQuery, config);
> // Parse the query into an AST. Here the exception occurred
> SqlNode sqlNode = parser.parseExpression();
> } {code}
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