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Commit074add6

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Fix tab completion of "SET variable TO|=" to not offer bogus completions.
Don't think that the context "UPDATE tab SET var =" is a GUC-settingcommand.If we have "SET var =" but the "var" is not a known GUC variable,don't offer any completions. The most likely explanation is thatwe've misparsed the context and it's not really a GUC-setting command.Per gripe from Ken Tanzer. Back-patch to 9.6. The issue existsfurther back, but before 9.6 the code looks very different and itdoesn't actually know whether the "var" name matches anything,so I desisted from trying to fix it.Discussion:https://postgr.es/m/CAD3a31XpXzrZA9TT3BqLSHghdTK+=cXjNCE+oL2Zn4+oWoc=qA@mail.gmail.com
1 parent4b85f20 commit074add6

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1 file changed

+26
-13
lines changed

1 file changed

+26
-13
lines changed

‎src/bin/psql/tab-complete.c

Lines changed: 26 additions & 13 deletions
Original file line numberDiff line numberDiff line change
@@ -3532,8 +3532,13 @@ psql_completion(const char *text, int start, int end)
35323532
elseif (HeadMatches2("ALTER","DATABASE|FUNCTION|PROCEDURE|ROLE|ROUTINE|USER")&&
35333533
TailMatches2("SET",MatchAny))
35343534
COMPLETE_WITH_LIST2("FROM CURRENT","TO");
3535-
/* Suggest possible variable values */
3536-
elseif (TailMatches3("SET",MatchAny,"TO|="))
3535+
3536+
/*
3537+
* Suggest possible variable values in SET variable TO|=, along with the
3538+
* preceding ALTER syntaxes.
3539+
*/
3540+
elseif (TailMatches3("SET",MatchAny,"TO|=")&&
3541+
!TailMatches5("UPDATE",MatchAny,"SET",MatchAny,"TO|="))
35373542
{
35383543
/* special cased code for individual GUCs */
35393544
if (TailMatches2("DateStyle","TO|="))
@@ -3556,21 +3561,29 @@ psql_completion(const char *text, int start, int end)
35563561
/* generic, type based, GUC support */
35573562
char*guctype=get_guctype(prev2_wd);
35583563

3559-
if (guctype&&strcmp(guctype,"enum")==0)
3564+
/*
3565+
* Note: if we don't recognize the GUC name, it's important to not
3566+
* offer any completions, as most likely we've misinterpreted the
3567+
* context and this isn't a GUC-setting command at all.
3568+
*/
3569+
if (guctype)
35603570
{
3561-
charquerybuf[1024];
3571+
if (strcmp(guctype,"enum")==0)
3572+
{
3573+
charquerybuf[1024];
35623574

3563-
snprintf(querybuf,sizeof(querybuf),Query_for_enum,prev2_wd);
3564-
COMPLETE_WITH_QUERY(querybuf);
3565-
}
3566-
elseif (guctype&&strcmp(guctype,"bool")==0)
3567-
COMPLETE_WITH_LIST9("on","off","true","false","yes","no",
3568-
"1","0","DEFAULT");
3569-
else
3570-
COMPLETE_WITH_CONST("DEFAULT");
3575+
snprintf(querybuf,sizeof(querybuf),
3576+
Query_for_enum,prev2_wd);
3577+
COMPLETE_WITH_QUERY(querybuf);
3578+
}
3579+
elseif (strcmp(guctype,"bool")==0)
3580+
COMPLETE_WITH_LIST9("on","off","true","false",
3581+
"yes","no","1","0","DEFAULT");
3582+
else
3583+
COMPLETE_WITH_CONST("DEFAULT");
35713584

3572-
if (guctype)
35733585
free(guctype);
3586+
}
35743587
}
35753588
}
35763589

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