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PREDISPATCHBLOCKEDCONSTRAINT

PREDISPATCH Blocked Constraints lists any constraints that were blocked in a Predispatch run. If no constraints are blocked, there will be no rows for that predispatch run.

Column Schema

CONSTRAINTID

Generic Constraint identifier (synonymous with GenConID)

SQL Type: VARCHAR2(20) Polars Type: pl.Categorical

This column is mandatory, and a primary key.

Example: V^SML_BUDP_3

PREDISPATCHSEQNO

Unique identifier of predispatch run in the form YYYYMMDDPP with 01 at 04:30

SQL Type: VARCHAR2(20) Polars Type: str

This column is mandatory, and a primary key.

Examples:

  • 2026071446
  • 2026071523

New Data Timing

Every 30 minutes

Code Examples

Polars

Casting is enums, categoricals etc is not essential, but may speed up parsing. Swapping int for pl.UInt16, pl.Int32 would also speed up parsing. However some of the datatypes are inferred, so they may be wrong.

This code deduplicates for you. Deduplication is normally only required across multiple months.

This code assumes that all columns are present, which may not be true for older files.

import polars as pl
import polars.selectors as cs

csv_paths = ["SOMEFILE.CSV", "OTHERFILE.CSV"]

lf = (
    pl.concat(
        [
            pl.scan_csv(
                csv_path,  # must be unzipped beforehand
                skip_rows=1,  # skip the header
                infer_schema=False,  # much faster
            )
            .filter(cs.by_index(0) == "D")  # drop the footer
            .select(~cs.by_index(range(4)))  # drop metadata columns
            for csv_path in csv_paths
        ],
        how="diagonal_relaxed",
    ).cast({"CONSTRAINTID": pl.Categorical, "PREDISPATCHSEQNO": str})
    # Deduplicate
    # We want one row per ['CONSTRAINTID', 'PREDISPATCHSEQNO']
    .unique(subset=["CONSTRAINTID", "PREDISPATCHSEQNO"], keep="any")
)

Nemosis

This table is not yet available in Nemosis.

Example File

From PUBLIC_ARCHIVE_PREDISPATCHBLOCKEDCONSTRAINT_FILE01_202607010000.zip

PREDISPATCHSEQNOCONSTRAINTID
2026071446V^SML_BUDP_3
2026071447V^SML_BUDP_3
2026071448V^SML_BUDP_3
2026071501V^SML_BUDP_3
2026071502V^SML_BUDP_3
2026071503V^SML_BUDP_3
2026071504V^SML_BUDP_3
2026071505V^SML_BUDP_3
2026071506V^SML_BUDP_3
2026071507V^SML_BUDP_3
2026071508V^SML_BUDP_3
...

CSETP.WORLDDVD_PREDISPATCHBLOCKEDCONSTRAINTAEMOPUBLIC2026/08/0812:56:29001786157789880MONTHLY_ARCHIVE001786157789880
IPREDISPATCHBLOCKED_CONSTRAINTS1PREDISPATCHSEQNOCONSTRAINTID
DPREDISPATCHBLOCKED_CONSTRAINTS12026071446V^SML_BUDP_3
DPREDISPATCHBLOCKED_CONSTRAINTS12026071447V^SML_BUDP_3
DPREDISPATCHBLOCKED_CONSTRAINTS12026071448V^SML_BUDP_3
DPREDISPATCHBLOCKED_CONSTRAINTS12026071501V^SML_BUDP_3
DPREDISPATCHBLOCKED_CONSTRAINTS12026071502V^SML_BUDP_3
DPREDISPATCHBLOCKED_CONSTRAINTS12026071503V^SML_BUDP_3
DPREDISPATCHBLOCKED_CONSTRAINTS12026071504V^SML_BUDP_3
DPREDISPATCHBLOCKED_CONSTRAINTS12026071505V^SML_BUDP_3
DPREDISPATCHBLOCKED_CONSTRAINTS12026071506V^SML_BUDP_3
DPREDISPATCHBLOCKED_CONSTRAINTS12026071507V^SML_BUDP_3
DPREDISPATCHBLOCKED_CONSTRAINTS12026071508V^SML_BUDP_3
...
CEND OF REPORT29

PREDISPATCHSEQNO,CONSTRAINTID
2026071446,V^SML_BUDP_3
2026071447,V^SML_BUDP_3
2026071448,V^SML_BUDP_3
2026071501,V^SML_BUDP_3
2026071502,V^SML_BUDP_3
2026071503,V^SML_BUDP_3
2026071504,V^SML_BUDP_3
2026071505,V^SML_BUDP_3
2026071506,V^SML_BUDP_3
2026071507,V^SML_BUDP_3
2026071508,V^SML_BUDP_3
...

C,SETP.WORLD,DVD_PREDISPATCHBLOCKEDCONSTRAINT,AEMO,PUBLIC,2026/08/08,12:56:29,001786157789880,MONTHLY_ARCHIVE,001786157789880
I,PREDISPATCH,BLOCKED_CONSTRAINTS,1,PREDISPATCHSEQNO,CONSTRAINTID
D,PREDISPATCH,BLOCKED_CONSTRAINTS,1,2026071446,V^SML_BUDP_3
D,PREDISPATCH,BLOCKED_CONSTRAINTS,1,2026071447,V^SML_BUDP_3
D,PREDISPATCH,BLOCKED_CONSTRAINTS,1,2026071448,V^SML_BUDP_3
D,PREDISPATCH,BLOCKED_CONSTRAINTS,1,2026071501,V^SML_BUDP_3
D,PREDISPATCH,BLOCKED_CONSTRAINTS,1,2026071502,V^SML_BUDP_3
D,PREDISPATCH,BLOCKED_CONSTRAINTS,1,2026071503,V^SML_BUDP_3
D,PREDISPATCH,BLOCKED_CONSTRAINTS,1,2026071504,V^SML_BUDP_3
D,PREDISPATCH,BLOCKED_CONSTRAINTS,1,2026071505,V^SML_BUDP_3
D,PREDISPATCH,BLOCKED_CONSTRAINTS,1,2026071506,V^SML_BUDP_3
D,PREDISPATCH,BLOCKED_CONSTRAINTS,1,2026071507,V^SML_BUDP_3
D,PREDISPATCH,BLOCKED_CONSTRAINTS,1,2026071508,V^SML_BUDP_3
...
C,"END OF REPORT",29

Availability

Visibility: Public

This table is in the public monthly MMSDM archive.

I have collated the list of all those files into one place, in this CSV metadata file. (Columns year, month, url, compressed_size in bytes).

The earliest available data is month 2 of 2025. The most recent available data is month 7 of 2026.

Warning

There are some months with no files.

Data Size

Each year of data is approximately 6 KB when zipped, 59 KB as unzipped CSV.

Deduplication and PDR Loader Configuration

The primary keys are:

The transaction type is "insert", which means that you will usually not see duplicate data. If you do, you can deduplicate based on the primary keys, without sorting first. Rows from different files with the same primary keys should have the same values.

PDR Loader configuration is:

Report Name Report Subtype Version
PREDISPATCH BLOCKED_CONSTRAINTS 1

This means that the CSV files start with metadata columns:

I,PREDISPATCH,BLOCKED_CONSTRAINTS,1,...
D,PREDISPATCH,BLOCKED_CONSTRAINTS,1,...

This page as JSON (schema documented here, but may change)

Download a JSON Schema specification for this table.

Official AEMO schema documentation

Other Information

Package: PRE_DISPATCH