Module rules 

Structs

AliasDuplicatedProjectionRewrite

Rewrite rule for adding alias to duplicated projection

CurrentUserVariableToSessionUserFunctionCall

Replace current_user with session_user()

FixArrayLiteral

FixCollate

Fix collate and regex calls

FixVersionColumnName

select version() should return column named version not version()

PrependUnqualifiedPgTableName

Prepend qualifier to table_name

RemoveQualifier

Remove qualifier from unsupported items

RemoveSubqueryFromProjection

A processor to replace unsupported subquery from projection with NULL.

RemoveUnsupportedTypes

Remove datafusion unsupported type annotations it also removes pg_catalog as qualifier

ResolveUnqualifiedIdentifer

Prepend qualifier for order by or filter when there is qualified wildcard

RewriteArrayAnyAllOperation

Rewrite Postgres’s ANY operator to array_contains

RewriteRegclassCastToSubquery

Rewrite regclass::oid cast to subquery

Traits

SqlStatementRewriteRule