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This includes backend "COPY TO/FROM PROGRAM '...'" syntax, and corresponding psql \copy syntax. Like with reading/writing files, the backend version is superuser-only, and in the psql version, the program is run in the client. In the passing, the psql \copy STDIN/STDOUT syntax is subtly changed: if you the stdin/stdout is quoted, it's now interpreted as a filename. For example, "\copy foo from 'stdin'" now reads from a file called 'stdin', not from standard input. Before this, there was no way to specify a filename called stdin, stdout, pstdin or pstdout. This creates a new function in pgport, wait_result_to_str(), which can be used to convert the exit status of a process, as returned by wait(3), to a human-readable string. Etsuro Fujita, reviewed by Amit Kapila. |
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| compatlib | ||
| ecpglib | ||
| include | ||
| pgtypeslib | ||
| preproc | ||
| test | ||
| Makefile | ||
| README.dynSQL | ||
src/interfaces/ecpg/README.dynSQL descriptor statements have the following shortcomings - input descriptors (USING DESCRIPTOR <name>) are not supported Reason: to fully support dynamic SQL the frontend/backend communication should change to recognize input parameters. Since this is not likely to happen in the near future and you can cover the same functionality with the existing infrastructure (using s[n]printf), I'll leave the work to someone else.