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SUBJOI - join two sorted files using common keyfields

 

Process Name

Menu Path

Link to Command Table

SUBJOI

ata ribbon | Data Tools | Relational | Subset Join

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Introduction

Performs a relational subset join of two input files into an output file.

This process belongs to a group of four similar ones within the Datamine process collection; JOIN, SUBJOI, WEAVE and SUBWVE. Each provides a different outcome, as described by the following diagram:

How to use

SUBJOI writes out matching records and all fields from both input files. Records are compared on the specified keyfields, and if a match is found, the two records are combined into one on the output file. If both files have identical Data Definitions then the record from the second input file is the one written out. Thus in this case the second file updates the first. If no match is found then no record is written out.

At least one keyfield must be specified and must appear in both input files as an explicit field. The keyfield may be up to 5 words long, and may be composed of up to 5 fields. If a field is specified which does not exist in both input files, it is ignored, providing at least one field matches.

Both input files must be sorted in the order of the keyfields before they can be joined. If this is not the case, the process will exit with an error message.

Files, Fields and Parameters

Input Files

Name

Description

I/O Status

Required

Type

IN1

First file to be updated (sorted on required keyfields).

Input

Yes

Table

IN2

Second file (update file) (sorted on required keyfields).

Input

Yes

Table

Output Files

Name

I/O Status

Required

Type

Description

OUT

Output

Yes

Table

Output file.

Fields

Name

Description

Source

Required

Type

Default

KEY1

Keyfield 1 for matching on.

IN1, IN2

Yes

Any

Undefined

KEY2

Keyfield 2.

IN1, IN2

No

Any

Undefined

KEY3

Keyfield 3.

IN1, IN2

No

Any

Undefined

KEY4

Keyfield 4.

IN1, IN2

No

Any

Undefined

KEY5

Keyfield 5.

IN1, IN2

No

Any

Undefined

KEY6

Keyfield 6.

IN1, IN2

No

Any

Undefined

KEY7

Keyfield 7.

IN1, IN2

No

Any

Undefined

KEY8

Keyfield 8.

IN1, IN2

No

Any

Undefined

KEY9

Keyfield 9.

IN1, IN2

No

Any

Undefined

KEY10

Keyfield 10.

IN1, IN2

No

Any

Undefined

 

Parameters

Name

Description

Required

Default

Range

Values

KEYTOL

KEYTOL is the tolerance value used to test whether numeric key values are equal. It must be greater than or equal to zero. It replaces the previous heuristic comparison method.

If KEYTOL is set to a negative value then zero is used.

In a macro KEYTOL can be set to absent using -. "@KEYTOL=-" This will revert to legacy behaviour and use a heuristic comparison in relational commands and zero in sort.

No

0.00001

0,+

Undefined

Notes

No additional notes.

Example

!SUBJOI

&IN1(BHASSAYS),&IN2(BHCOLLARS),&OUT(HOLES),
*KEY1(BHID)

  
The collars file bhcollars is joined with the assays file bhassays on the keyfield BHID. Unlike JOIN, where all BHID values from either input file would appear in the output file, SUBJOI will only produce records where the same BHID values appear in both files; in other words, SUBJOI will produce an output file containing drillhole records for which there are both assay and collar data.

Error and Warning Messages

Message

Description

Solution

>>> ERR 47 <<< ( 0) IN FNDKEY

Warning; none of the specified keyfields exist in the input files. The full Cartesian product is produced and written to the output file.

Check that the specified keyfield(s) *KEYn exist in the &IN1 and &IN2 files.

 

 

 

>>> KEYFIELD aaaaaaaa MISSING FROM FILE ffffffff

 

A warning message that is produced if @PRINT >=1. The keyfield is ignored and processing continues

Check that the specified keyfield(s) *KEYn exist in the &IN1 and &IN2 files.

>>> INPUT FILE NOT SORTED ON KEYFIELD <<<

>>> ERR 122 <<< ( fileno) IN SUBJOI

 

One (or both) of the input files is not sorted on the designated keyfield(s). Fatal; the process is exited.

Sort the &IN1 and &IN2 files on the specified keyfield(s) *KEYn.

 

 

 

>>> FILE ffffffff CANNOT BE USED AS BOTH <<<

>>> INPUT AND OUTPUT BY THIS PROCESS <<<

>>> ERR 130 <<< ( fileno) IN SUBJOI

 

 

Either the first or second input file has the same name as the output file. Fatal; the process is exited.

Use different &IN* and &OUT files.