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Process Help RESTRI - copy records restricted by key field values in second input file |
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Process Name |
Menu Path |
Link to Command Table |
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RESTRI |
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Introduction
Performs a relational restriction operation.
How to use
Records from the first input file are copied to the output file only if there is a match between the keyfields of the first and second input files. The effect is to select records from the first input file if they are matched with the entries in the second input file, using the keyfields as the match criteria. Thus restriction is essentially a record selection mechanism.
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 processed by RESTRI. If this is not the case, the process will exit with an error message.
A typical use of the RESTRI process is to select drillholes from a file by supplying a set of borehole identifiers as the second input file.
Files, Fields and Parameters
Input Files
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Name |
Description |
I/O Status |
Required |
Type |
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IN1 |
File to have records selected (sorted on required keyfields). |
Input |
Yes |
Table |
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IN2 |
File with required values of keyfields (sorted on required keyfields). |
Input |
Yes |
Table |
Output Files
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Name |
I/O Status |
Required |
Type |
Description |
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OUT |
Output |
Yes |
Table |
Output file. |
Fields
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Name |
Description |
Source |
Required |
Type |
Default |
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KEY1 |
Keyfield for matching. |
IN1, IN2 |
Yes |
Any |
Undefined |
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KEY2 |
Keyfield 2. |
IN1, IN2 |
No |
Any |
Undefined |
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KEY3 |
Keyfield 3. |
IN1, IN2 |
No |
Any |
Undefined |
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KEY4 |
Keyfield 4. |
IN1, IN2 |
No |
Any |
Undefined |
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KEY5 |
Keyfield 5. |
IN1, IN2 |
No |
Any |
Undefined |
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KEY6 |
Keyfield 6. |
IN1, IN2 |
No |
Any |
Undefined |
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KEY7 |
Keyfield 7. |
IN1, IN2 |
No |
Any |
Undefined |
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KEY8 |
Keyfield 8. |
IN1, IN2 |
No |
Any |
Undefined |
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KEY9 |
Keyfield 9. |
IN1, IN2 |
No |
Any |
Undefined |
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KEY10 |
Keyfield 10. |
IN1, IN2 |
No |
Any |
Undefined |
Notes
No additional notes.
Example
!RESTRI &IN1(FILE),&IN2(BHIDS),&OUT(FILE1),*KEY1(BHID)
Error and Warning Messages
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Message |
Description |
Solution |
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>>> INPUT FILE NOT SORTED ON KEYFIELD <<< |
One (or both) of the input files is not sorted on the designated keyfield(s). Fatal; the process is exited. |
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>>> ERR 47 <<< ( 0) IN FNDKEY |
Warning; none of the specified key fields exist in the input files. An output file is produced consisting only of a Data Definition containing the fields of both input files. |
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>>> KEYFIELD aaaaaaaa MISSING FROM FILE ffffffff |
A warning message that is produced if @PRINT >=1. The keyfield is ignored and processing continues. |
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>>> ERR 121 <<< ( fileno) IN RESTRI |
One (or both) of the input files is empty. Fatal; the process is exited. |
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