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Improve reporting of "conflicting or redundant options" errors.

Browse Source 
When reporting "conflicting or redundant options" errors, try to
ensure that errposition() is used, to help the user identify the
offending option.

Formerly, errposition() was invoked in less than 60% of cases. This
patch raises that to over 90%, but there remain a few places where the
ParseState is not readily available. Using errdetail() might improve
the error in such cases, but that is left as a task for the future.

Additionally, since this error is thrown from over 100 places in the
codebase, introduce a dedicated function to throw it, reducing code
duplication.

Extracted from a slightly larger patch by Vignesh C. Reviewed by
Bharath Rupireddy, Alvaro Herrera, Dilip Kumar, Hou Zhijie, Peter
Smith, Daniel Gustafsson, Julien Rouhaud and me.

Discussion: https://postgr.es/m/CALDaNm33FFSS5tVyvmkoK2cCMuDVxcui=gFrjti9ROfynqSAGA@mail.gmail.com
This commit is contained in:
Dean Rasheed
2021-07-15 08:49:45 +01:00
parent ffc9ddaea3
commit 2bfb50b3df
22 changed files with 180 additions and 395 deletions
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70
src/backend/commands/dbcommands.c
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@ -152,91 +152,61 @@ createdb(ParseState *pstate, const CreatedbStmt *stmt)
if (strcmp(defel->defname, "tablespace") == 0)
{
if (dtablespacename)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options"),
parser_errposition(pstate, defel->location)));
errorConflictingDefElem(defel, pstate);
dtablespacename = defel;
}
else if (strcmp(defel->defname, "owner") == 0)
{
if (downer)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options"),
parser_errposition(pstate, defel->location)));
errorConflictingDefElem(defel, pstate);
downer = defel;
}
else if (strcmp(defel->defname, "template") == 0)
{
if (dtemplate)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options"),
parser_errposition(pstate, defel->location)));
errorConflictingDefElem(defel, pstate);
dtemplate = defel;
}
else if (strcmp(defel->defname, "encoding") == 0)
{
if (dencoding)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options"),
parser_errposition(pstate, defel->location)));
errorConflictingDefElem(defel, pstate);
dencoding = defel;
}
else if (strcmp(defel->defname, "locale") == 0)
{
if (dlocale)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options"),
parser_errposition(pstate, defel->location)));
errorConflictingDefElem(defel, pstate);
dlocale = defel;
}
else if (strcmp(defel->defname, "lc_collate") == 0)
{
if (dcollate)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options"),
parser_errposition(pstate, defel->location)));
errorConflictingDefElem(defel, pstate);
dcollate = defel;
}
else if (strcmp(defel->defname, "lc_ctype") == 0)
{
if (dctype)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options"),
parser_errposition(pstate, defel->location)));
errorConflictingDefElem(defel, pstate);
dctype = defel;
}
else if (strcmp(defel->defname, "is_template") == 0)
{
if (distemplate)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options"),
parser_errposition(pstate, defel->location)));
errorConflictingDefElem(defel, pstate);
distemplate = defel;
}
else if (strcmp(defel->defname, "allow_connections") == 0)
{
if (dallowconnections)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options"),
parser_errposition(pstate, defel->location)));
errorConflictingDefElem(defel, pstate);
dallowconnections = defel;
}
else if (strcmp(defel->defname, "connection_limit") == 0)
{
if (dconnlimit)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options"),
parser_errposition(pstate, defel->location)));
errorConflictingDefElem(defel, pstate);
dconnlimit = defel;
}
else if (strcmp(defel->defname, "location") == 0)
@ -1497,37 +1467,25 @@ AlterDatabase(ParseState *pstate, AlterDatabaseStmt *stmt, bool isTopLevel)
if (strcmp(defel->defname, "is_template") == 0)
{
if (distemplate)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options"),
parser_errposition(pstate, defel->location)));
errorConflictingDefElem(defel, pstate);
distemplate = defel;
}
else if (strcmp(defel->defname, "allow_connections") == 0)
{
if (dallowconnections)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options"),
parser_errposition(pstate, defel->location)));
errorConflictingDefElem(defel, pstate);
dallowconnections = defel;
}
else if (strcmp(defel->defname, "connection_limit") == 0)
{
if (dconnlimit)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options"),
parser_errposition(pstate, defel->location)));
errorConflictingDefElem(defel, pstate);
dconnlimit = defel;
}
else if (strcmp(defel->defname, "tablespace") == 0)
{
if (dtablespace)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options"),
parser_errposition(pstate, defel->location)));
errorConflictingDefElem(defel, pstate);
dtablespace = defel;
}
else