FlyingZC opened a new issue, #26006:
URL: https://github.com/apache/shardingsphere/issues/26006
## Bug Report
### Which version of ShardingSphere did you use?
Master.
### Which project did you use? ShardingSphere-JDBC or ShardingSphere-Proxy?
Proxy.
### Expected behavior
Execute sql successful.
### Actual behavior
### Reason analyze (If you can)
### Steps to reproduce the behavior, such as: SQL to execute, sharding rule
configuration, when exception occur etc.
```sql
SELECT t.tableoid, t.oid, t.typname, t.typnamespace, (SELECT
pg_catalog.array_agg(acl ORDER BY row_n) FROM (SELECT acl, row_n FROM
pg_catalog.unnest(coalesce(t.typacl,pg_catalog.acldefault('T',t.typowner)))
WITH ORDINALITY AS perm(acl,row_n) WHERE NOT EXISTS ( SELECT 1 FROM
pg_catalog.unnest(coalesce(pip.initprivs,pg_catalog.acldefault('T',t.typowner)))
AS init(init_acl) WHERE acl = init_acl)) as foo) AS typacl, (SELECT
pg_catalog.array_agg(acl ORDER BY row_n) FROM (SELECT acl, row_n FROM
pg_catalog.unnest(coalesce(pip.initprivs,pg_catalog.acldefault('T',t.typowner)))
WITH ORDINALITY AS initp(acl,row_n) WHERE NOT EXISTS ( SELECT 1 FROM
pg_catalog.unnest(coalesce(t.typacl,pg_catalog.acldefault('T',t.typowner))) AS
permp(orig_acl) WHERE acl = orig_acl)) as foo) AS rtypacl, NULL AS inittypacl,
NULL AS initrtypacl, (SELECT rolname FROM pg_catalog.pg_roles WHERE oid =
t.typowner) AS rolname, t.typelem, t.typrelid, CASE WHEN t.typrelid = 0 THEN '
'::"char" ELSE (SELECT relkind FROM pg_c
lass WHERE oid = t.typrelid) END AS typrelkind, t.typtype, t.typisdefined,
t.typname[0] = '_' AND t.typelem != 0 AND (SELECT typarray FROM pg_type te
WHERE oid = t.typelem) = t.oid AS isarray FROM pg_type t LEFT JOIN
pg_init_privs pip ON (t.oid = pip.objoid AND pip.classoid = 'pg_type'::regclass
AND pip.objsubid = 0)
```
```
[WARN ] 2023-06-02 11:41:02.431 [ShardingSphere-Command-0]
o.a.s.p.f.p.c.q.s.PostgreSQLComQueryExecutor - PostgreSQLComQueryExecutor:
SELECT t.tableoid, t.oid, t.typname, t.typnamespace, (SELECT
pg_catalog.array_agg(acl ORDER BY row_n) FROM (SELECT acl, row_n FROM
pg_catalog.unnest(coalesce(t.typacl,pg_catalog.acldefault('T',t.typowner)))
WITH ORDINALITY AS perm(acl,row_n) WHERE NOT EXISTS ( SELECT 1 FROM
pg_catalog.unnest(coalesce(pip.initprivs,pg_catalog.acldefault('T',t.typowner)))
AS init(init_acl) WHERE acl = init_acl)) as foo) AS typacl, (SELECT
pg_catalog.array_agg(acl ORDER BY row_n) FROM (SELECT acl, row_n FROM
pg_catalog.unnest(coalesce(pip.initprivs,pg_catalog.acldefault('T',t.typowner)))
WITH ORDINALITY AS initp(acl,row_n) WHERE NOT EXISTS ( SELECT 1 FROM
pg_catalog.unnest(coalesce(t.typacl,pg_catalog.acldefault('T',t.typowner))) AS
permp(orig_acl) WHERE acl = orig_acl)) as foo) AS rtypacl, NULL AS inittypacl,
NULL AS initrtypacl, (SELECT rolname FROM pg_catalog.pg_rol
es WHERE oid = t.typowner) AS rolname, t.typelem, t.typrelid, CASE WHEN
t.typrelid = 0 THEN ' '::"char" ELSE (SELECT relkind FROM pg_class WHERE oid =
t.typrelid) END AS typrelkind, t.typtype, t.typisdefined, t.typname[0] = '_'
AND t.typelem != 0 AND (SELECT typarray FROM pg_type te WHERE oid = t.typelem)
= t.oid AS isarray FROM pg_type t LEFT JOIN pg_init_privs pip ON (t.oid =
pip.objoid AND pip.classoid = 'pg_type'::regclass AND pip.objsubid = 0) ;
[ERROR] 2023-06-02 11:43:17.550 [ShardingSphere-Command-0]
o.a.s.p.f.c.CommandExecutorTask - Exception occur:
java.lang.NullPointerException: null
at
org.apache.shardingsphere.sql.parser.postgresql.visitor.statement.PostgreSQLStatementVisitor.visitColumnref(PostgreSQLStatementVisitor.java:504)
at
org.apache.shardingsphere.sql.parser.postgresql.visitor.statement.PostgreSQLStatementVisitor.visitColumnref(PostgreSQLStatementVisitor.java:203)
at
org.apache.shardingsphere.sql.parser.autogen.PostgreSQLStatementParser$ColumnrefContext.accept(PostgreSQLStatementParser.java:17290)
at
org.antlr.v4.runtime.tree.AbstractParseTreeVisitor.visit(AbstractParseTreeVisitor.java:18)
at
org.apache.shardingsphere.sql.parser.postgresql.visitor.statement.PostgreSQLStatementVisitor.visitCExpr(PostgreSQLStatementVisitor.java:381)
at
org.apache.shardingsphere.sql.parser.postgresql.visitor.statement.PostgreSQLStatementVisitor.visitCExpr(PostgreSQLStatementVisitor.java:203)
at
org.apache.shardingsphere.sql.parser.autogen.PostgreSQLStatementParser$CExprContext.accept(PostgreSQLStatementParser.java:16526)
at
org.antlr.v4.runtime.tree.AbstractParseTreeVisitor.visit(AbstractParseTreeVisitor.java:18)
at
org.apache.shardingsphere.sql.parser.postgresql.visitor.statement.PostgreSQLStatementVisitor.visitAExpr(PostgreSQLStatementVisitor.java:289)
at
org.apache.shardingsphere.sql.parser.postgresql.visitor.statement.PostgreSQLStatementVisitor.visitAExpr(PostgreSQLStatementVisitor.java:203)
at
org.apache.shardingsphere.sql.parser.autogen.PostgreSQLStatementParser$AExprContext.accept(PostgreSQLStatementParser.java:15448)
at
org.antlr.v4.runtime.tree.AbstractParseTreeVisitor.visit(AbstractParseTreeVisitor.java:18)
at
org.apache.shardingsphere.sql.parser.postgresql.visitor.statement.PostgreSQLStatementVisitor.createBinaryOperationSegment(PostgreSQLStatementVisitor.java:372)
at
org.apache.shardingsphere.sql.parser.postgresql.visitor.statement.PostgreSQLStatementVisitor.visitAExpr(PostgreSQLStatementVisitor.java:305)
at
org.apache.shardingsphere.sql.parser.postgresql.visitor.statement.PostgreSQLStatementVisitor.visitAExpr(PostgreSQLStatementVisitor.java:203)
at
org.apache.shardingsphere.sql.parser.autogen.PostgreSQLStatementParser$AExprContext.accept(PostgreSQLStatementParser.java:15448)
at
org.antlr.v4.runtime.tree.AbstractParseTreeVisitor.visit(AbstractParseTreeVisitor.java:18)
at
org.apache.shardingsphere.sql.parser.postgresql.visitor.statement.PostgreSQLStatementVisitor.createBinaryOperationSegment(PostgreSQLStatementVisitor.java:372)
at
org.apache.shardingsphere.sql.parser.postgresql.visitor.statement.PostgreSQLStatementVisitor.visitAExpr(PostgreSQLStatementVisitor.java:305)
at
org.apache.shardingsphere.sql.parser.postgresql.visitor.statement.PostgreSQLStatementVisitor.visitAExpr(PostgreSQLStatementVisitor.java:203)
at
org.apache.shardingsphere.sql.parser.autogen.PostgreSQLStatementParser$AExprContext.accept(PostgreSQLStatementParser.java:15448)
at
org.antlr.v4.runtime.tree.AbstractParseTreeVisitor.visit(AbstractParseTreeVisitor.java:18)
at
org.apache.shardingsphere.sql.parser.postgresql.visitor.statement.PostgreSQLStatementVisitor.createBinaryOperationSegment(PostgreSQLStatementVisitor.java:372)
at
org.apache.shardingsphere.sql.parser.postgresql.visitor.statement.PostgreSQLStatementVisitor.visitAExpr(PostgreSQLStatementVisitor.java:305)
at
org.apache.shardingsphere.sql.parser.postgresql.visitor.statement.PostgreSQLStatementVisitor.visitAExpr(PostgreSQLStatementVisitor.java:203)
at
org.apache.shardingsphere.sql.parser.autogen.PostgreSQLStatementParser$AExprContext.accept(PostgreSQLStatementParser.java:15448)
at
org.antlr.v4.runtime.tree.AbstractParseTreeVisitor.visit(AbstractParseTreeVisitor.java:18)
at
org.apache.shardingsphere.sql.parser.postgresql.visitor.statement.PostgreSQLStatementVisitor.createProjectionSegment(PostgreSQLStatementVisitor.java:1043)
at
org.apache.shardingsphere.sql.parser.postgresql.visitor.statement.PostgreSQLStatementVisitor.visitTargetEl(PostgreSQLStatementVisitor.java:1026)
at
org.apache.shardingsphere.sql.parser.postgresql.visitor.statement.PostgreSQLStatementVisitor.visitTargetEl(PostgreSQLStatementVisitor.java:203)
at
org.apache.shardingsphere.sql.parser.autogen.PostgreSQLStatementParser$TargetElContext.accept(PostgreSQLStatementParser.java:8005)
at
org.antlr.v4.runtime.tree.AbstractParseTreeVisitor.visit(AbstractParseTreeVisitor.java:18)
at
org.apache.shardingsphere.sql.parser.postgresql.visitor.statement.PostgreSQLStatementVisitor.visitTargetList(PostgreSQLStatementVisitor.java:1019)
at
org.apache.shardingsphere.sql.parser.postgresql.visitor.statement.PostgreSQLStatementVisitor.visitTargetList(PostgreSQLStatementVisitor.java:203)
at
org.apache.shardingsphere.sql.parser.autogen.PostgreSQLStatementParser$TargetListContext.accept(PostgreSQLStatementParser.java:7924)
at
org.antlr.v4.runtime.tree.AbstractParseTreeVisitor.visit(AbstractParseTreeVisitor.java:18)
at
org.apache.shardingsphere.sql.parser.postgresql.visitor.statement.PostgreSQLStatementVisitor.visitSimpleSelect(PostgreSQLStatementVisitor.java:950)
at
org.apache.shardingsphere.sql.parser.postgresql.visitor.statement.PostgreSQLStatementVisitor.visitSimpleSelect(PostgreSQLStatementVisitor.java:203)
at
org.apache.shardingsphere.sql.parser.autogen.PostgreSQLStatementParser$SimpleSelectContext.accept(PostgreSQLStatementParser.java:5675)
at
org.antlr.v4.runtime.tree.AbstractParseTreeVisitor.visit(AbstractParseTreeVisitor.java:18)
at
org.apache.shardingsphere.sql.parser.postgresql.visitor.statement.PostgreSQLStatementVisitor.visitSelectClauseN(PostgreSQLStatementVisitor.java:918)
at
org.apache.shardingsphere.sql.parser.postgresql.visitor.statement.PostgreSQLStatementVisitor.visitSelectClauseN(PostgreSQLStatementVisitor.java:203)
at
org.apache.shardingsphere.sql.parser.autogen.PostgreSQLStatementParser$SelectClauseNContext.accept(PostgreSQLStatementParser.java:5510)
at
org.antlr.v4.runtime.tree.AbstractParseTreeVisitor.visit(AbstractParseTreeVisitor.java:18)
at
org.apache.shardingsphere.sql.parser.postgresql.visitor.statement.PostgreSQLStatementVisitor.visitSelectNoParens(PostgreSQLStatementVisitor.java:886)
at
org.apache.shardingsphere.sql.parser.postgresql.visitor.statement.PostgreSQLStatementVisitor.visitSelectNoParens(PostgreSQLStatementVisitor.java:203)
at
org.apache.shardingsphere.sql.parser.autogen.PostgreSQLStatementParser$SelectNoParensContext.accept(PostgreSQLStatementParser.java:5303)
at
org.antlr.v4.runtime.tree.AbstractParseTreeVisitor.visit(AbstractParseTreeVisitor.java:18)
at
org.apache.shardingsphere.sql.parser.postgresql.visitor.statement.PostgreSQLStatementVisitor.visitSelect(PostgreSQLStatementVisitor.java:879)
at
org.apache.shardingsphere.sql.parser.postgresql.visitor.statement.PostgreSQLStatementVisitor.visitSelect(PostgreSQLStatementVisitor.java:203)
at
org.apache.shardingsphere.sql.parser.autogen.PostgreSQLStatementParser$SelectContext.accept(PostgreSQLStatementParser.java:5180)
at
org.apache.shardingsphere.sql.parser.api.SQLStatementVisitorEngine.visit(SQLStatementVisitorEngine.java:48)
at
org.apache.shardingsphere.infra.parser.sql.SQLStatementParserExecutor.parse(SQLStatementParserExecutor.java:46)
at
org.apache.shardingsphere.infra.parser.sql.SQLStatementParserEngine.parse(SQLStatementParserEngine.java:47)
at
org.apache.shardingsphere.infra.parser.ShardingSphereSQLParserEngine.parse(ShardingSphereSQLParserEngine.java:52)
at
org.apache.shardingsphere.proxy.backend.handler.ProxyBackendHandlerFactory.newInstance(ProxyBackendHandlerFactory.java:88)
at
org.apache.shardingsphere.proxy.frontend.postgresql.command.query.simple.PostgreSQLComQueryExecutor.<init>(PostgreSQLComQueryExecutor.java:74)
at
org.apache.shardingsphere.proxy.frontend.postgresql.command.PostgreSQLCommandExecutorFactory.getCommandExecutor(PostgreSQLCommandExecutorFactory.java:112)
at
org.apache.shardingsphere.proxy.frontend.postgresql.command.PostgreSQLCommandExecutorFactory.newInstance(PostgreSQLCommandExecutorFactory.java:77)
at
org.apache.shardingsphere.proxy.frontend.postgresql.command.PostgreSQLCommandExecuteEngine.getCommandExecutor(PostgreSQLCommandExecuteEngine.java:66)
at
org.apache.shardingsphere.proxy.frontend.command.CommandExecutorTask.executeCommand(CommandExecutorTask.java:120)
at
org.apache.shardingsphere.proxy.frontend.command.CommandExecutorTask.run(CommandExecutorTask.java:78)
at com.alibaba.ttl.TtlRunnable.run(TtlRunnable.java:60)
at
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:834)
```
### Example codes for reproduce this issue (such as a github link).
```sql
postgres=# create table t2(id name);
CREATE TABLE
postgres=# insert into t2 values('test');
INSERT 0 1
-- It reports NPE in ShardingSphere-Proxy
postgres=# select * from t2 where t2.id[0]='t';
```
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