[BUG] 5.4-SNAPSHOT: PostgreSQL 18 CREATE TABLE declarative partitions cannot be parsed #2522

Failing SQL feature

PostgreSQL declarative partitioning is not represented by CreateTable:

• A multi-column parent PARTITION BY fails at the comma.
• CREATE TABLE ... PARTITION OF fails at OF for RANGE, LIST, HASH, and DEFAULT bounds.

SQL examples

CREATE TABLE pg_range_parent (
    tenant_id int,
    happened_at timestamptz
) PARTITION BY RANGE (tenant_id, happened_at);

CREATE TABLE pg_range_p1 PARTITION OF pg_range_parent
    FOR VALUES FROM (1, MINVALUE) TO (2, MAXVALUE);

CREATE TABLE pg_list_parent (region text) PARTITION BY LIST (region);
CREATE TABLE pg_list_eu_us PARTITION OF pg_list_parent
    FOR VALUES IN ('eu', 'us');
CREATE TABLE pg_list_default PARTITION OF pg_list_parent DEFAULT;

CREATE TABLE pg_hash_parent (tenant_id int) PARTITION BY HASH (tenant_id);
CREATE TABLE pg_hash_p0 PARTITION OF pg_hash_parent
    FOR VALUES WITH (MODULUS 4, REMAINDER 0);

Actual behavior

Tested with JSqlParser 5.4-SNAPSHOT at 9a32ff568f580178d9a27b101596aa43eb45d0b7:

• The multi-column parent throws ParseException at the comma in (tenant_id, happened_at).
• Every PARTITION OF form throws ParseException at OF.

Expected behavior

These statements should parse as CreateTable, deparse without losing partition clauses, and expose structured fields for:

• partition strategy and ordered partition keys;
• the parent table of a partition;
• RANGE FROM/TO, LIST IN, HASH MODULUS/REMAINDER, and DEFAULT bounds.

Software information and server validation

• JSqlParser: 5.4-SNAPSHOT
• Database: PostgreSQL 18.6 (postgres:18)
• All seven statements above executed successfully with ON_ERROR_STOP=1. pg_inherits, pg_get_partkeydef, and pg_get_expr(relpartbound, ...) confirmed the resulting parent/child partition metadata.
• Grammar reference: https://www.postgresql.org/docs/18/sql-createtable.html

AI assistance

OpenAI Codex was used to assemble the syntax matrix and run the parser/server comparison. The cases were checked against the PostgreSQL 18 documentation and an actual PostgreSQL 18.6 server.