pgsql: ecpg: Restore detection of unsupported COPY FROM STDIN.

ecpg: Restore detection of unsupported COPY FROM STDIN.

The ecpg command includes code to warn about unsupported COPY FROM STDIN
statements in input files. However, since commit 3d009e45bd,
this functionality has been broken due to a bug introduced in that commit,
causing ecpg to fail to detect the statement.

This commit resolves the issue, restoring ecpg's ability to detect
COPY FROM STDIN and issue a warning as intended.

Back-patch to all supported versions.

Author: Ryo Kanbayashi
Reviewed-by: Hayato Kuroda, Tom Lane
Discussion: https://postgr.es/m/CANOn0Ez_t5uDCUEV8c1YORMisJiU5wu681eEVZzgKwOeiKhkqQ@mail.gmail.com

Branch
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REL_13_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/226c9048d734ba13ef88c04a7405a67ad8014a7d

Modified Files
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src/interfaces/ecpg/preproc/ecpg.addons | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)