everly-gif commented on code in PR #19842:
URL: https://github.com/apache/shardingsphere/pull/19842#discussion_r937321651
##########
shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-postgresql/src/main/antlr4/imports/postgresql/DDLStatement.g4:
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@@ -1056,10 +1056,10 @@ foreignServerVersion
alterStatistics
: ALTER STATISTICS
- ( ifExists? anyName SET STATISTICS signedIconst
Review Comment:
you mean the postgres **gram.y** file right?
```
AlterStatsStmt:
ALTER STATISTICS any_name SET STATISTICS SignedIconst
{
AlterStatsStmt *n =
makeNode(AlterStatsStmt);
n->defnames = $3;
n->missing_ok = false;
n->stxstattarget = $6;
$$ = (Node *) n;
}
| ALTER STATISTICS IF_P EXISTS any_name SET STATISTICS
SignedIconst
{
AlterStatsStmt *n =
makeNode(AlterStatsStmt);
n->defnames = $5;
n->missing_ok = true;
n->stxstattarget = $8;
$$ = (Node *) n;
}
;
```
There if exists is supported.
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