OFFERGOVDATA

OFFERGOVDATA sets out reoffers of governor (6 and 60 second FCAS) availability.

Deprecation Warning

This table is in the HISTORICAL TABLES package, so is likely deprecated.

Not in Use - discontinued 30/09/2001

Confidential to participant

Source

Updated as reoffers process.

Column Schema

CONTRACTID

Contract Version No.

SQL Type: VARCHAR2(10) Polars Type: pl.Categorical

This column is mandatory, and a primary key.

EFFECTIVEDATE

Effective Date of Re-Offer

Warning

Despite what the name suggests, this is a datetime, not a date.

SQL Type: DATE Polars Type: pl.Datetime()

This column is mandatory, and a primary key.

Example: 2026/01/20 00:05:00

PERIODID

Market day trading interval number

SQL Type: NUMBER(3,0) Polars Type: pl.Int16

This column is mandatory, and a primary key.

VERSIONNO

Version No. of Re-Offer

SQL Type: NUMBER(3,0) Polars Type: pl.UInt16

This column is mandatory, and a primary key.

AUTHORISEDBY

User Name

SQL Type: VARCHAR2(15) Polars Type: str

This column is not mandatory.

AUTHORISEDDATE

Date Contract was Authorised

Warning

Despite what the name suggests, this is a datetime, not a date.

SQL Type: DATE Polars Type: pl.Datetime()

This column is not mandatory.

Example: 2026/01/20 00:05:00

FILENAME

File name of Re-Offer file

SQL Type: VARCHAR2(40) Polars Type: str

This column is not mandatory.

LASTCHANGED

Last date and time record changed

For more information, see the dedicated documentation page.

SQL Type: DATE Polars Type: pl.Datetime()

This column is not mandatory.

Example: 2026/01/20 00:05:00

SEC6AVAILDOWN

Availability for 6 Second Lower (0 or 1)

SQL Type: NUMBER(6,0) Polars Type: pl.Int32

This column is not mandatory.

SEC6AVAILUP

Availability for 6 Second Raise (0 or 1. '0'= unavailable, '1' = available)

SQL Type: NUMBER(6,0) Polars Type: pl.Int32

This column is not mandatory.

SEC60AVAILDOWN

Availability for 60 Second Lower (0 or 1)

SQL Type: NUMBER(6,0) Polars Type: pl.Int32

This column is not mandatory.

SEC60AVAILUP

Availability for 60 Second Raise (0 or 1)

SQL Type: NUMBER(6,0) Polars Type: pl.Int32

This column is not mandatory.

New Data Timing

Updated as reoffers are processed

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

# e.g. "2029/03/15 00:05:00"
dt_s_fmt = "%Y/%m/%d %H:%M:%S"

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",
    )
    .with_columns(
        pl.col("EFFECTIVEDATE", "AUTHORISEDDATE", "LASTCHANGED").str.strptime(
            pl.Datetime, dt_s_fmt
        ),
    )
    .cast(
        {
            "CONTRACTID": pl.Categorical,
            "PERIODID": int,  # or pl.Int16
            "VERSIONNO": int,  # or pl.UInt16
            "AUTHORISEDBY": str,
            "FILENAME": str,
            "SEC6AVAILDOWN": int,  # or pl.Int32
            "SEC6AVAILUP": int,  # or pl.Int32
            "SEC60AVAILDOWN": int,  # or pl.Int32
            "SEC60AVAILUP": int,  # or pl.Int32
        }
    )
    # Deduplicate
    # We want one row per ['CONTRACTID', 'EFFECTIVEDATE', 'PERIODID', 'VERSIONNO']
    # Tie-breaker: greatest value of ['LASTCHANGED']
    .sort(["LASTCHANGED"], descending=False)
    .unique(
        subset=["CONTRACTID", "EFFECTIVEDATE", "PERIODID", "VERSIONNO"], keep="last"
    )
)

Nemosis

This table is not yet available in Nemosis.

Availability

Visibility: Private

This table is not available in the public monthly MMSDM archive. Is is only available to registered market participants over FTP inside a VPN.

Deduplication and PDR Loader Configuration

The primary keys are:

CONTRACTID
EFFECTIVEDATE
PERIODID
VERSIONNO

PDR Loader configuration does not mention this table, so it is unclear how to choose which row to keep when there are multiple rows for a given set of primary keys.

You should probably take the row with the maximum LASTCHANGED.