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Fix psql's \dC command to annotate I/O conversion casts as such.

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A cast declared WITH INOUT was described as '(binary coercible)',
which seems pretty inaccurate; let's print '(with inout)' instead.
Per complaint from Jean-Pierre Pelletier.

This definitely seems like a bug fix, but given that it's been wrong
since 8.4 and nobody complained before, I'm hesitant to back-patch a
behavior change into stable branches.  It doesn't seem too late for
v11 though.

Discussion: https://postgr.es/m/5b887023.1c69fb81.ff96e.6a1d@mx.google.com
This commit is contained in:
Tom Lane 2018-08-31 16:45:33 -04:00
parent c34f8078aa
commit ed9c336b0f
1 changed files with 38 additions and 18 deletions
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56
src/bin/psql/describe.c
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@ -15,6 +15,7 @@
#include <ctype.h>
#include "catalog/pg_attribute_d.h"
#include "catalog/pg_cast_d.h"
#include "catalog/pg_class_d.h"
#include "catalog/pg_default_acl_d.h"
#include "fe_utils/string_utils.h"
@ -3953,37 +3954,56 @@ listCasts(const char *pattern, bool verbose)
initPQExpBuffer(&buf);
/*
* We need a left join to pg_proc for binary casts; the others are just
* paranoia. Also note that we don't attempt to localize '(binary
* coercible)', because there's too much risk of gettext translating a
* function name that happens to match some string in the PO database.
*/
printfPQExpBuffer(&buf,
"SELECT pg_catalog.format_type(castsource, NULL) AS \"%s\",\n"
" pg_catalog.format_type(casttarget, NULL) AS \"%s\",\n"
" CASE WHEN castfunc = 0 THEN '(binary coercible)'\n"
" ELSE p.proname\n"
" END as \"%s\",\n"
" CASE WHEN c.castcontext = 'e' THEN '%s'\n"
" WHEN c.castcontext = 'a' THEN '%s'\n"
" ELSE '%s'\n"
" END as \"%s\"",
" pg_catalog.format_type(casttarget, NULL) AS \"%s\",\n",
gettext_noop("Source type"),
gettext_noop("Target type"),
gettext_noop("Function"),
gettext_noop("Target type"));
/*
* We don't attempt to localize '(binary coercible)' or '(with inout)',
* because there's too much risk of gettext translating a function name
* that happens to match some string in the PO database.
*/
if (pset.sversion >= 80400)
appendPQExpBuffer(&buf,
" CASE WHEN c.castmethod = '%c' THEN '(binary coercible)'\n"
" WHEN c.castmethod = '%c' THEN '(with inout)'\n"
" ELSE p.proname\n"
" END AS \"%s\",\n",
COERCION_METHOD_BINARY,
COERCION_METHOD_INOUT,
gettext_noop("Function"));
else
appendPQExpBuffer(&buf,
" CASE WHEN c.castfunc = 0 THEN '(binary coercible)'\n"
" ELSE p.proname\n"
" END AS \"%s\",\n",
gettext_noop("Function"));
appendPQExpBuffer(&buf,
" CASE WHEN c.castcontext = '%c' THEN '%s'\n"
" WHEN c.castcontext = '%c' THEN '%s'\n"
" ELSE '%s'\n"
" END AS \"%s\"",
COERCION_CODE_EXPLICIT,
gettext_noop("no"),
COERCION_CODE_ASSIGNMENT,
gettext_noop("in assignment"),
gettext_noop("yes"),
gettext_noop("Implicit?"));
if (verbose)
appendPQExpBuffer(&buf,
",\n d.description AS \"%s\"\n",
",\n d.description AS \"%s\"",
gettext_noop("Description"));
/*
* We need a left join to pg_proc for binary casts; the others are just
* paranoia.
*/
appendPQExpBufferStr(&buf,
"FROM pg_catalog.pg_cast c LEFT JOIN pg_catalog.pg_proc p\n"
"\nFROM pg_catalog.pg_cast c LEFT JOIN pg_catalog.pg_proc p\n"
" ON c.castfunc = p.oid\n"
" LEFT JOIN pg_catalog.pg_type ts\n"
" ON c.castsource = ts.oid\n"