feat: parse PostgreSQL CREATE CAST, CREATE TRANSFORM, CREATE CONVERSION and ALTER CONVERSION

README.md

@@ -165,6 +165,7 @@ and missing syntax gets added on demand — [open an issue](https://github.com/J
 | **MySQL utility statements** | `EXPLAIN`/`DESCRIBE [ANALYZE] FORMAT = …` · `EXPLAIN FOR CONNECTION` · `DESCRIBE t col` · `PREPARE … FROM` · `EXECUTE … USING` · `DROP PREPARE` · `DO` |
 | **PostgreSQL administration** | `CREATE`/`ALTER EVENT TRIGGER` · `REINDEX` · `SECURITY LABEL` |
 | **PostgreSQL types and rules** | `CREATE TYPE` (shell, composite, enum, range and base types) · `ALTER TYPE` · `CREATE RULE` · `ALTER RULE` |
+| **PostgreSQL casts, transforms and conversions** | `CREATE CAST` · `DROP CAST` · `CREATE [OR REPLACE] TRANSFORM` · `DROP TRANSFORM` · `CREATE [DEFAULT] CONVERSION` · `ALTER CONVERSION` |
 | **PostgreSQL operators and aggregates** | `CREATE`/`ALTER OPERATOR` · `CREATE`/`ALTER OPERATOR CLASS` · `CREATE`/`ALTER OPERATOR FAMILY` · `CREATE`/`ALTER AGGREGATE` |
 | **Informix constraints** | `ALTER TABLE … ADD CONSTRAINT` with trailing constraint names for primary, unique, foreign and check constraints; enable with `parser.withDialect(Dialect.INFORMIX)` |
 | **Salesforce SOQL** | `INCLUDES` · `EXCLUDES` |

src/main/java/net/sf/jsqlparser/parser/feature/Feature.java

@@ -1036,6 +1036,30 @@ public enum Feature {
      * @see net.sf.jsqlparser.statement.alter.AlterRule
      */
     alterRule,
+    /**
+     * PostgreSQL "CREATE CAST" statement is allowed
+     *
+     * @see net.sf.jsqlparser.statement.create.cast.CreateCast
+     */
+    createCast,
+    /**
+     * PostgreSQL "CREATE TRANSFORM" statement is allowed
+     *
+     * @see net.sf.jsqlparser.statement.create.transform.CreateTransform
+     */
+    createTransform,
+    /**
+     * PostgreSQL "CREATE CONVERSION" statement is allowed
+     *
+     * @see net.sf.jsqlparser.statement.create.conversion.CreateConversion
+     */
+    createConversion,
+    /**
+     * PostgreSQL "ALTER CONVERSION" statement is allowed
+     *
+     * @see net.sf.jsqlparser.statement.alter.AlterConversion
+     */
+    alterConversion,
     /**
      * PostgreSQL "CREATE OPERATOR" statement is allowed
      *

src/main/java/net/sf/jsqlparser/statement/StatementFeatureVisitor.java

@@ -45,6 +45,10 @@
 import net.sf.jsqlparser.statement.alter.AlterOperatorFamily;
 import net.sf.jsqlparser.statement.alter.AlterAggregate;
 import net.sf.jsqlparser.statement.alter.AlterRule;
+import net.sf.jsqlparser.statement.create.cast.CreateCast;
+import net.sf.jsqlparser.statement.create.transform.CreateTransform;
+import net.sf.jsqlparser.statement.create.conversion.CreateConversion;
+import net.sf.jsqlparser.statement.alter.AlterConversion;
 import net.sf.jsqlparser.statement.alter.AlterServer;
 import net.sf.jsqlparser.statement.alter.AlterSession;
 import net.sf.jsqlparser.statement.alter.AlterStatistics;
@@ -1623,21 +1627,41 @@ public <S> Void visit(AlterRule statement, S context) {
         return schemaOnly();
     }
 
+    @Override
+    public <S> Void visit(CreateCast statement, S context) {
+        return schemaOnly();
+    }
+
     @Override
     public <S> Void visit(CreateOperator statement, S context) {
         return schemaOnly();
     }
 
+    @Override
+    public <S> Void visit(CreateTransform statement, S context) {
+        return schemaOnly();
+    }
+
     @Override
     public <S> Void visit(CreateOperatorClass statement, S context) {
         return schemaOnly();
     }
 
+    @Override
+    public <S> Void visit(CreateConversion statement, S context) {
+        return schemaOnly();
+    }
+
     @Override
     public <S> Void visit(CreateOperatorFamily statement, S context) {
         return schemaOnly();
     }
 
+    @Override
+    public <S> Void visit(AlterConversion statement, S context) {
+        return schemaOnly();
+    }
+
     @Override
     public <S> Void visit(CreateAggregate statement, S context) {
         return schemaOnly();

src/main/java/net/sf/jsqlparser/statement/StatementVisitor.java

@@ -33,6 +33,10 @@
 import net.sf.jsqlparser.statement.alter.AlterOperatorFamily;
 import net.sf.jsqlparser.statement.alter.AlterAggregate;
 import net.sf.jsqlparser.statement.alter.AlterRule;
+import net.sf.jsqlparser.statement.create.cast.CreateCast;
+import net.sf.jsqlparser.statement.create.transform.CreateTransform;
+import net.sf.jsqlparser.statement.create.conversion.CreateConversion;
+import net.sf.jsqlparser.statement.alter.AlterConversion;
 import net.sf.jsqlparser.statement.alter.AlterRoutine;
 import net.sf.jsqlparser.statement.alter.AlterTrigger;
 import net.sf.jsqlparser.statement.alter.AlterPolicy;
@@ -1253,6 +1257,38 @@ default void visit(AlterRule statement) {
         visit(statement, null);
     }
 
+    default <S> T visit(CreateCast statement, S context) {
+        return null;
+    }
+
+    default void visit(CreateCast statement) {
+        visit(statement, null);
+    }
+
+    default <S> T visit(CreateTransform statement, S context) {
+        return null;
+    }
+
+    default void visit(CreateTransform statement) {
+        visit(statement, null);
+    }
+
+    default <S> T visit(CreateConversion statement, S context) {
+        return null;
+    }
+
+    default void visit(CreateConversion statement) {
+        visit(statement, null);
+    }
+
+    default <S> T visit(AlterConversion statement, S context) {
+        return null;
+    }
+
+    default void visit(AlterConversion statement) {
+        visit(statement, null);
+    }
+
     default <S> T visit(CreateOperator statement, S context) {
         return null;
     }

src/main/java/net/sf/jsqlparser/statement/StatementVisitorAdapter.java

@@ -11,6 +11,10 @@
 
 import net.sf.jsqlparser.statement.alter.AlterRelation;
 import net.sf.jsqlparser.statement.alter.AlterRule;
+import net.sf.jsqlparser.statement.create.cast.CreateCast;
+import net.sf.jsqlparser.statement.create.transform.CreateTransform;
+import net.sf.jsqlparser.statement.create.conversion.CreateConversion;
+import net.sf.jsqlparser.statement.alter.AlterConversion;
 import net.sf.jsqlparser.statement.alter.AlterTablespace;
 import net.sf.jsqlparser.statement.alter.AlterPolicy;
 import net.sf.jsqlparser.statement.alter.AlterRoutine;
@@ -1285,4 +1289,24 @@ public <S> T visit(AlterRule statement, S context) {
         fromItemVisitor.visitFromItem(statement.getTable(), context);
         return null;
     }
+
+    @Override
+    public <S> T visit(CreateCast statement, S context) {
+        return null;
+    }
+
+    @Override
+    public <S> T visit(CreateTransform statement, S context) {
+        return null;
+    }
+
+    @Override
+    public <S> T visit(CreateConversion statement, S context) {
+        return null;
+    }
+
+    @Override
+    public <S> T visit(AlterConversion statement, S context) {
+        return null;
+    }
 }

src/main/java/net/sf/jsqlparser/statement/alter/AlterConversion.java

@@ -0,0 +1,130 @@
+/*-
+ * #%L
+ * JSQLParser library
+ * %%
+ * Copyright (C) 2004 - 2026 JSQLParser
+ * %%
+ * Dual licensed under GNU LGPL 2.1 or Apache License 2.0
+ * #L%
+ */
+package net.sf.jsqlparser.statement.alter;
+
+import net.sf.jsqlparser.parser.ASTNodeAccessImpl;
+import net.sf.jsqlparser.statement.Statement;
+import net.sf.jsqlparser.statement.StatementVisitor;
+
+/**
+ * PostgreSQL
+ * {@code ALTER CONVERSION name {RENAME TO new_name | OWNER TO role | SET SCHEMA schema}}. Names
+ * retain SQL identifier quoting.
+ */
+public class AlterConversion extends ASTNodeAccessImpl implements Statement {
+    public enum Action {
+        RENAME, OWNER, SET_SCHEMA
+    }
+
+    private String name;
+    private Action action;
+    private String newName;
+    private String owner;
+    private String schemaName;
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public AlterConversion withName(String name) {
+        setName(name);
+        return this;
+    }
+
+    public Action getAction() {
+        return action;
+    }
+
+    public void setAction(Action action) {
+        this.action = action;
+    }
+
+    public AlterConversion withAction(Action action) {
+        setAction(action);
+        return this;
+    }
+
+    public String getNewName() {
+        return newName;
+    }
+
+    public void setNewName(String newName) {
+        this.newName = newName;
+    }
+
+    public AlterConversion withNewName(String newName) {
+        setNewName(newName);
+        return this;
+    }
+
+    /**
+     * The new owner: a role name, {@code CURRENT_ROLE}, {@code CURRENT_USER} or
+     * {@code SESSION_USER}.
+     *
+     * @return the owner of {@code OWNER TO}
+     */
+    public String getOwner() {
+        return owner;
+    }
+
+    public void setOwner(String owner) {
+        this.owner = owner;
+    }
+
+    public AlterConversion withOwner(String owner) {
+        setOwner(owner);
+        return this;
+    }
+
+    public String getSchemaName() {
+        return schemaName;
+    }
+
+    public void setSchemaName(String schemaName) {
+        this.schemaName = schemaName;
+    }
+
+    public AlterConversion withSchemaName(String schemaName) {
+        setSchemaName(schemaName);
+        return this;
+    }
+
+    public StringBuilder appendTo(StringBuilder builder) {
+        builder.append("ALTER CONVERSION ").append(name);
+        switch (action) {
+            case RENAME:
+                builder.append(" RENAME TO ").append(newName);
+                break;
+            case OWNER:
+                builder.append(" OWNER TO ").append(owner);
+                break;
+            case SET_SCHEMA:
+                builder.append(" SET SCHEMA ").append(schemaName);
+                break;
+            default:
+                throw new IllegalStateException("Unknown conversion action: " + action);
+        }
+        return builder;
+    }
+
+    @Override
+    public String toString() {
+        return appendTo(new StringBuilder()).toString();
+    }
+
+    @Override
+    public <T, S> T accept(StatementVisitor<T> statementVisitor, S context) {
+        return statementVisitor.visit(this, context);
+    }
+}