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https://issues.apache.org/jira/browse/CALCITE-2844?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16807878#comment-16807878
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Hongze Zhang edited comment on CALCITE-2844 at 4/2/19 3:48 PM:
---------------------------------------------------------------
I've run the two tests and reproduced the failures.
The first one {{testOuterApplyFunctionFails}} fails because the table function
"ramp(deptno)" is now get successfully parsed, as it was previously not a legal
syntax.
Besides, the SQL used in the case is wired since it ends with two right
brackets "{{))}}":
{code:sql}
select * from dept outer apply ramp(deptno^)^)
{code}
In general it should be
{code:sql}
select * from dept outer apply ramp(deptno^)^
{code}
The second bracket looks like a typo. I think you can just remove the bracket
and error anchors (the "^"). Then let the test case pass.
The case {{testTableExtend}} fails because of bad lookahead.
I see your LOOKAHEAD hint is set as
{code}
LOOKAHEAD({ (getToken(1).kind == IDENTIFIER && getToken(2).kind == LPAREN) ||
(getToken(1).kind == SPECIFIC && getToken(2).kind == IDENTIFIER &&
getToken(3).kind == LPAREN) })
{code}
The hint is conflict with "extend clause" (see CALCITE-493). There should be
multiple solutions to solve the conflict (using syntactic lookahead, or
changing the expansion match order, etc.)
was (Author: zhztheplayer):
I've run the two tests and reproduced the failures.
The first one {{testOuterApplyFunctionFails}} fails because the table function
"ramp(deptno)" is now get successfully parsed, as it was previously not a legal
syntax.
Besides, the SQL used in the case is wired since it ends with two right
brackets "{{))}}":
{code:sql}
select * from dept outer apply ramp(deptno^)^)
{code}
In general it should be
{code:sql}
select * from dept outer apply ramp(deptno^)^
{code}
The second bracket looks like a typo. I think you can just remove the bracket
and error anchors (the "^"). Then let the test case pass.
The case {{testTableExtend}} fails because of bad lookahead.
I see your LOOKAHEAD hint is set as
{code}
LOOKAHEAD({ (getToken(1).kind == IDENTIFIER && getToken(2).kind == LPAREN) ||
(getToken(1).kind == SPECIFIC && getToken(2).kind == IDENTIFIER &&
getToken(3).kind == LPAREN) })
{code}
The hint is conflict with "extend clause" (see CALCITE-493). There should be
multiple solutions to solve the conflict (using syntactic lookahead, or
changing the expansion match order, etc. Maybe the later is better?)
> Babel parser should parse PostgreSQL table functions
> ----------------------------------------------------
>
> Key: CALCITE-2844
> URL: https://issues.apache.org/jira/browse/CALCITE-2844
> Project: Calcite
> Issue Type: Bug
> Components: babel
> Affects Versions: 1.18.0
> Reporter: Muhammad Gelbana
> Priority: Major
>
> *Code to reproduce the problem*
> {code:java}
> public static void main(String[] args) throws Exception {
> Config parserConfig =
> configBuilder().setConformance(SqlConformanceEnum.BABEL).setParserFactory(SqlBabelParserImpl.FACTORY).build();
> FrameworkConfig frameworkConfig =
> Frameworks.newConfigBuilder().parserConfig(parserConfig).build();
> Planner planner = Frameworks.getPlanner(frameworkConfig);
> String pg = "select * from generate_series(1, 5)";
> planner.parse(pg);
> }
> {code}
>
> *Thrown exception*
> {noformat}
> Exception in thread "main" org.apache.calcite.sql.parser.SqlParseException:
> Encountered "( 1" at line 1, column 30.
> Was expecting one of:
> <EOF>
> "ORDER" ...
> "LIMIT" ...
> "OFFSET" ...
> "FETCH" ...
> "NATURAL" ...
> "JOIN" ...
> "INNER" ...
> "LEFT" ...
> "RIGHT" ...
> "FULL" ...
> "CROSS" ...
> "," ...
> "OUTER" ...
> "(" <IDENTIFIER> ...
> "(" <QUOTED_IDENTIFIER> ...
> "(" <BACK_QUOTED_IDENTIFIER> ...
> "(" <BRACKET_QUOTED_IDENTIFIER> ...
> "(" <UNICODE_QUOTED_IDENTIFIER> ...
> "MATCH_RECOGNIZE" ...
> "." ...
> "(" ...
> <IDENTIFIER> ...
> <QUOTED_IDENTIFIER> ...
> <BACK_QUOTED_IDENTIFIER> ...
> <BRACKET_QUOTED_IDENTIFIER> ...
> <UNICODE_QUOTED_IDENTIFIER> ...
> "TABLESAMPLE" ...
> "WHERE" ...
> "GROUP" ...
> "HAVING" ...
> "WINDOW" ...
> "UNION" ...
> "INTERSECT" ...
> "EXCEPT" ...
> "MINUS" ...
>
> at
> org.apache.calcite.sql.parser.babel.SqlBabelParserImpl.convertException(SqlBabelParserImpl.java:354)
> at
> org.apache.calcite.sql.parser.babel.SqlBabelParserImpl.normalizeException(SqlBabelParserImpl.java:142)
> at org.apache.calcite.sql.parser.SqlParser.parseQuery(SqlParser.java:156)
> at org.apache.calcite.sql.parser.SqlParser.parseStmt(SqlParser.java:181)
> at org.apache.calcite.prepare.PlannerImpl.parse(PlannerImpl.java:174)
> at org.apache.calcite.tools.Planner.parse(Planner.java:50)
> at com.lab.calcite.App2.main(App2.java:24)
> Caused by: org.apache.calcite.sql.parser.babel.ParseException: Encountered "(
> 1" at line 1, column 30.
> Was expecting one of:
> <EOF>
> "ORDER" ...
> "LIMIT" ...
> "OFFSET" ...
> "FETCH" ...
> "NATURAL" ...
> "JOIN" ...
> "INNER" ...
> "LEFT" ...
> "RIGHT" ...
> "FULL" ...
> "CROSS" ...
> "," ...
> "OUTER" ...
> "(" <IDENTIFIER> ...
> "(" <QUOTED_IDENTIFIER> ...
> "(" <BACK_QUOTED_IDENTIFIER> ...
> "(" <BRACKET_QUOTED_IDENTIFIER> ...
> "(" <UNICODE_QUOTED_IDENTIFIER> ...
> "MATCH_RECOGNIZE" ...
> "." ...
> "(" ...
> <IDENTIFIER> ...
> <QUOTED_IDENTIFIER> ...
> <BACK_QUOTED_IDENTIFIER> ...
> <BRACKET_QUOTED_IDENTIFIER> ...
> <UNICODE_QUOTED_IDENTIFIER> ...
> "TABLESAMPLE" ...
> "WHERE" ...
> "GROUP" ...
> "HAVING" ...
> "WINDOW" ...
> "UNION" ...
> "INTERSECT" ...
> "EXCEPT" ...
> "MINUS" ...
>
> at
> org.apache.calcite.sql.parser.babel.SqlBabelParserImpl.generateParseException(SqlBabelParserImpl.java:31191)
> at
> org.apache.calcite.sql.parser.babel.SqlBabelParserImpl.jj_consume_token(SqlBabelParserImpl.java:31008)
> at
> org.apache.calcite.sql.parser.babel.SqlBabelParserImpl.SqlStmtEof(SqlBabelParserImpl.java:877)
> at
> org.apache.calcite.sql.parser.babel.SqlBabelParserImpl.parseSqlStmtEof(SqlBabelParserImpl.java:198)
> at org.apache.calcite.sql.parser.SqlParser.parseQuery(SqlParser.java:148)
> ... 4 more
> {noformat}
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