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https://issues.apache.org/jira/browse/CALCITE-6986?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17947389#comment-17947389
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Mihai Budiu commented on CALCITE-6986:
--------------------------------------
Maybe this test is not a good one, because sql() always expects to have a
statement.
But the point is that the parser should accept white-space-only programs and
return an empty statement list.
> Parser rejects a SQL program containing just whitespace
> -------------------------------------------------------
>
> Key: CALCITE-6986
> URL: https://issues.apache.org/jira/browse/CALCITE-6986
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.39.0
> Reporter: Mihai Budiu
> Priority: Minor
>
> The following SqlParserTest returns a SqlParseException:
> {code}
> sql(" ").ok("");
> {code}
> Stack trace:
> {code}
> at
> org.apache.calcite.sql.parser.impl.SqlParserImpl.generateParseException(SqlParserImpl.java:44127)
> at
> org.apache.calcite.sql.parser.impl.SqlParserImpl.jj_consume_token(SqlParserImpl.java:43938)
> at
> org.apache.calcite.sql.parser.impl.SqlParserImpl.SqlStmt(SqlParserImpl.java:4127)
> at
> org.apache.calcite.sql.parser.impl.SqlParserImpl.SqlStmtEof(SqlParserImpl.java:4139)
> at
> org.apache.calcite.sql.parser.impl.SqlParserImpl.parseSqlStmtEof(SqlParserImpl.java:209)
> at
> org.apache.calcite.sql.parser.SqlParser.parseQuery(SqlParser.java:172)
> {code}
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