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Make type "name" collation-aware. 

The "name" comparison operators now all support collations, making them
functionally equivalent to "text" comparisons, except for the different
physical representation of the datatype.  They do, in fact, mostly share
the varstr_cmp and varstr_sortsupport infrastructure, which has been
slightly enlarged to handle the case.

To avoid changes in the default behavior of the datatype, set name's
typcollation to C_COLLATION_OID not DEFAULT_COLLATION_OID, so that
by default comparisons to a name value will continue to use strcmp
semantics.  (This would have been the case for system catalog columns
anyway, because of commit 6b0faf723, but doing this makes it true for
user-created name columns as well.  In particular, this avoids
locale-dependent changes in our regression test results.)

In consequence, tweak a couple of places that made assumptions about
collatable base types always having typcollation DEFAULT_COLLATION_OID.
I have not, however, attempted to relax the restriction that user-
defined collatable types must have that.  Hence, "name" doesn't
behave quite like a user-defined type; it acts more like a domain
with COLLATE "C".  (Conceivably, if we ever get rid of the need for
catalog name columns to be fixed-length, "name" could actually become
such a domain over text.  But that'd be a pretty massive undertaking,
and I'm not volunteering.)

Discussion: https://postgr.es/m/15938.1544377821@sss.pgh.pa.us
This commit is contained in:
Tom Lane 2018-12-19 17:35:12 -05:00
parent 68f6f2b739
commit 586b98fdf1
16 changed files with 211 additions and 125 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
doc/src/sgml/catalogs.sgml
View File

@ -7866,10 +7866,10 @@ SCRAM-SHA-256$<replaceable>&lt;iteration count&gt;</replaceable>:<replaceable>&l
<entry><para>
<structfield>typcollation</structfield> specifies the collation
of the type. If the type does not support collations, this will
be zero. A base type that supports collations will have
<symbol>DEFAULT_COLLATION_OID</symbol> here. A domain over a
collatable type can have some other collation OID, if one was
specified for the domain.
be zero. A base type that supports collations will have a nonzero
value here, typically <symbol>DEFAULT_COLLATION_OID</symbol>.
A domain over a collatable type can have a collation OID different
from its base type's, if one was specified for the domain.
</para></entry>
</row>

27
src/backend/access/nbtree/nbtcompare.c
View File

@ -333,30 +333,3 @@ btcharcmp(PG_FUNCTION_ARGS)
/* Be careful to compare chars as unsigned */
PG_RETURN_INT32((int32) ((uint8) a) - (int32) ((uint8) b));
}
Datum
btnamecmp(PG_FUNCTION_ARGS)
{
Name a = PG_GETARG_NAME(0);
Name b = PG_GETARG_NAME(1);
PG_RETURN_INT32(strncmp(NameStr(*a), NameStr(*b), NAMEDATALEN));
}
static int
btnamefastcmp(Datum x, Datum y, SortSupport ssup)
{
Name a = DatumGetName(x);
Name b = DatumGetName(y);
return strncmp(NameStr(*a), NameStr(*b), NAMEDATALEN);
}
Datum
btnamesortsupport(PG_FUNCTION_ARGS)
{
SortSupport ssup = (SortSupport) PG_GETARG_POINTER(0);
ssup->comparator = btnamefastcmp;
PG_RETURN_VOID();
}

2
src/backend/bootstrap/bootstrap.c
View File

@ -111,7 +111,7 @@ static const struct typinfo TypInfo[] = {
F_INT4IN, F_INT4OUT},
{"float4", FLOAT4OID, 0, 4, FLOAT4PASSBYVAL, 'i', 'p', InvalidOid,
F_FLOAT4IN, F_FLOAT4OUT},
{"name", NAMEOID, CHAROID, NAMEDATALEN, false, 'c', 'p', InvalidOid,
{"name", NAMEOID, CHAROID, NAMEDATALEN, false, 'c', 'p', C_COLLATION_OID,
F_NAMEIN, F_NAMEOUT},
{"regclass", REGCLASSOID, 0, 4, true, 'i', 'p', InvalidOid,
F_REGCLASSIN, F_REGCLASSOUT},

11
src/backend/commands/explain.c
View File

@ -14,7 +14,6 @@
#include "postgres.h"
#include "access/xact.h"
#include "catalog/pg_collation.h"
#include "catalog/pg_type.h"
#include "commands/createas.h"
#include "commands/defrem.h"
@ -2347,11 +2346,13 @@ show_sortorder_options(StringInfo buf, Node *sortexpr,
TYPECACHE_LT_OPR | TYPECACHE_GT_OPR);
/*
* Print COLLATE if it's not default. There are some cases where this is
* redundant, eg if expression is a column whose declared collation is
* that collation, but it's hard to distinguish that here.
* Print COLLATE if it's not default for the column's type. There are
* some cases where this is redundant, eg if expression is a column whose
* declared collation is that collation, but it's hard to distinguish that
* here (and arguably, printing COLLATE explicitly is a good idea anyway
* in such cases).
*/
if (OidIsValid(collation) && collation != DEFAULT_COLLATION_OID)
if (OidIsValid(collation) && collation != get_typcollation(sortcoltype))
{
char *collname = get_collation_name(collation);

10
src/backend/nodes/nodeFuncs.c
View File

@ -862,7 +862,11 @@ exprCollation(const Node *expr)
coll = ((const MinMaxExpr *) expr)->minmaxcollid;
break;
case T_SQLValueFunction:
coll = InvalidOid; /* all cases return non-collatable types */
/* Returns either NAME or a non-collatable type */
if (((const SQLValueFunction *) expr)->type == NAMEOID)
coll = C_COLLATION_OID;
else
coll = InvalidOid;
break;
case T_XmlExpr:
@ -1075,7 +1079,9 @@ exprSetCollation(Node *expr, Oid collation)
((MinMaxExpr *) expr)->minmaxcollid = collation;
break;
case T_SQLValueFunction:
Assert(!OidIsValid(collation)); /* no collatable results */
Assert((((SQLValueFunction *) expr)->type == NAMEOID) ?
(collation == C_COLLATION_OID) :
(collation == InvalidOid));
break;
case T_XmlExpr:
Assert((((XmlExpr *) expr)->op == IS_XMLSERIALIZE) ?

2
src/backend/optimizer/path/indxpath.c
View File

@ -4344,7 +4344,7 @@ string_to_const(const char *str, Oid datatype)
break;
case NAMEOID:
collation = InvalidOid;
collation = C_COLLATION_OID;
constlen = NAMEDATALEN;
break;

2
src/backend/parser/parse_clause.c
View File

@ -788,7 +788,7 @@ transformRangeTableFunc(ParseState *pstate, RangeTableFunc *rtf)
tf->coltypes = lappend_oid(tf->coltypes, typid);
tf->coltypmods = lappend_int(tf->coltypmods, typmod);
tf->colcollations = lappend_oid(tf->colcollations,
type_is_collatable(typid) ? DEFAULT_COLLATION_OID : InvalidOid);
get_typcollation(typid));
/* Transform the PATH and DEFAULT expressions */
if (rawc->colexpr)

80
src/backend/utils/adt/name.c
View File

@ -21,6 +21,7 @@
#include "postgres.h"
#include "catalog/namespace.h"
#include "catalog/pg_collation.h"
#include "catalog/pg_type.h"
#include "libpq/pqformat.h"
#include "mb/pg_wchar.h"
@ -28,6 +29,7 @@
#include "utils/array.h"
#include "utils/builtins.h"
#include "utils/lsyscache.h"
#include "utils/varlena.h"
/*****************************************************************************
@ -113,22 +115,21 @@ namesend(PG_FUNCTION_ARGS)
/*****************************************************************************
* PUBLIC ROUTINES *
* COMPARISON/SORTING ROUTINES *
*****************************************************************************/
/*
* nameeq - returns 1 iff arguments are equal
* namene - returns 1 iff arguments are not equal
*
* BUGS:
* Assumes that "xy\0\0a" should be equal to "xy\0b".
* If not, can do the comparison backwards for efficiency.
*
* namelt - returns 1 iff a < b
* namele - returns 1 iff a <= b
* namegt - returns 1 iff a > b
* namege - returns 1 iff a >= b
*
* Note that the use of strncmp with NAMEDATALEN limit is mostly historical;
* strcmp would do as well, because we do not allow NAME values that don't
* have a '\0' terminator. Whatever might be past the terminator is not
* considered relevant to comparisons.
*/
Datum
nameeq(PG_FUNCTION_ARGS)
@ -136,6 +137,7 @@ nameeq(PG_FUNCTION_ARGS)
Name arg1 = PG_GETARG_NAME(0);
Name arg2 = PG_GETARG_NAME(1);
/* Collation doesn't matter: equal only if bitwise-equal */
PG_RETURN_BOOL(strncmp(NameStr(*arg1), NameStr(*arg2), NAMEDATALEN) == 0);
}
@ -145,16 +147,30 @@ namene(PG_FUNCTION_ARGS)
Name arg1 = PG_GETARG_NAME(0);
Name arg2 = PG_GETARG_NAME(1);
/* Collation doesn't matter: equal only if bitwise-equal */
PG_RETURN_BOOL(strncmp(NameStr(*arg1), NameStr(*arg2), NAMEDATALEN) != 0);
}
static int
namecmp(Name arg1, Name arg2, Oid collid)
{
/* Fast path for common case used in system catalogs */
if (collid == C_COLLATION_OID)
return strncmp(NameStr(*arg1), NameStr(*arg2), NAMEDATALEN);
/* Else rely on the varstr infrastructure */
return varstr_cmp(NameStr(*arg1), strlen(NameStr(*arg1)),
NameStr(*arg2), strlen(NameStr(*arg2)),
collid);
}
Datum
namelt(PG_FUNCTION_ARGS)
{
Name arg1 = PG_GETARG_NAME(0);
Name arg2 = PG_GETARG_NAME(1);
PG_RETURN_BOOL(strncmp(NameStr(*arg1), NameStr(*arg2), NAMEDATALEN) < 0);
PG_RETURN_BOOL(namecmp(arg1, arg2, PG_GET_COLLATION()) < 0);
}
Datum
@ -163,7 +179,7 @@ namele(PG_FUNCTION_ARGS)
Name arg1 = PG_GETARG_NAME(0);
Name arg2 = PG_GETARG_NAME(1);
PG_RETURN_BOOL(strncmp(NameStr(*arg1), NameStr(*arg2), NAMEDATALEN) <= 0);
PG_RETURN_BOOL(namecmp(arg1, arg2, PG_GET_COLLATION()) <= 0);
}
Datum
@ -172,7 +188,7 @@ namegt(PG_FUNCTION_ARGS)
Name arg1 = PG_GETARG_NAME(0);
Name arg2 = PG_GETARG_NAME(1);
PG_RETURN_BOOL(strncmp(NameStr(*arg1), NameStr(*arg2), NAMEDATALEN) > 0);
PG_RETURN_BOOL(namecmp(arg1, arg2, PG_GET_COLLATION()) > 0);
}
Datum
@ -181,11 +197,39 @@ namege(PG_FUNCTION_ARGS)
Name arg1 = PG_GETARG_NAME(0);
Name arg2 = PG_GETARG_NAME(1);
PG_RETURN_BOOL(strncmp(NameStr(*arg1), NameStr(*arg2), NAMEDATALEN) >= 0);
PG_RETURN_BOOL(namecmp(arg1, arg2, PG_GET_COLLATION()) >= 0);
}
Datum
btnamecmp(PG_FUNCTION_ARGS)
{
Name arg1 = PG_GETARG_NAME(0);
Name arg2 = PG_GETARG_NAME(1);
PG_RETURN_INT32(namecmp(arg1, arg2, PG_GET_COLLATION()));
}
Datum
btnamesortsupport(PG_FUNCTION_ARGS)
{
SortSupport ssup = (SortSupport) PG_GETARG_POINTER(0);
Oid collid = ssup->ssup_collation;
MemoryContext oldcontext;
oldcontext = MemoryContextSwitchTo(ssup->ssup_cxt);
/* Use generic string SortSupport */
varstr_sortsupport(ssup, NAMEOID, collid);
MemoryContextSwitchTo(oldcontext);
PG_RETURN_VOID();
}
/* (see char.c for comparison/operation routines) */
/*****************************************************************************
* MISCELLANEOUS PUBLIC ROUTINES *
*****************************************************************************/
int
namecpy(Name n1, const NameData *n2)
@ -204,14 +248,6 @@ namecat(Name n1, Name n2)
}
#endif
#ifdef NOT_USED
int
namecmp(Name n1, Name n2)
{
return strncmp(NameStr(*n1), NameStr(*n2), NAMEDATALEN);
}
#endif
int
namestrcpy(Name name, const char *str)
{
@ -243,6 +279,12 @@ namestrcat(Name name, const char *str)
}
#endif
/*
* Compare a NAME to a C string
*
* Assumes C collation always; be careful when using this for
* anything but equality checks!
*/
int
namestrcmp(Name name, const char *str)
{

44
src/backend/utils/adt/selfuncs.c
View File

@ -6341,23 +6341,16 @@ make_greater_string(const Const *str_const, FmgrInfo *ltproc, Oid collation)
char *workstr;
int len;
Datum cmpstr;
text *cmptxt = NULL;
char *cmptxt = NULL;
mbcharacter_incrementer charinc;
/*
* Get a modifiable copy of the prefix string in C-string format, and set
* up the string we will compare to as a Datum. In C locale this can just
* be the given prefix string, otherwise we need to add a suffix. Types
* NAME and BYTEA sort bytewise so they don't need a suffix either.
* be the given prefix string, otherwise we need to add a suffix. Type
* BYTEA sorts bytewise so it never needs a suffix either.
*/
if (datatype == NAMEOID)
{
workstr = DatumGetCString(DirectFunctionCall1(nameout,
str_const->constvalue));
len = strlen(workstr);
cmpstr = str_const->constvalue;
}
else if (datatype == BYTEAOID)
if (datatype == BYTEAOID)
{
bytea *bstr = DatumGetByteaPP(str_const->constvalue);
@ -6369,7 +6362,11 @@ make_greater_string(const Const *str_const, FmgrInfo *ltproc, Oid collation)
}
else
{
workstr = TextDatumGetCString(str_const->constvalue);
if (datatype == NAMEOID)
workstr = DatumGetCString(DirectFunctionCall1(nameout,
str_const->constvalue));
else
workstr = TextDatumGetCString(str_const->constvalue);
len = strlen(workstr);
if (lc_collate_is_c(collation) || len == 0)
cmpstr = str_const->constvalue;
@ -6395,11 +6392,22 @@ make_greater_string(const Const *str_const, FmgrInfo *ltproc, Oid collation)
}
/* And build the string to compare to */
cmptxt = (text *) palloc(VARHDRSZ + len + 1);
SET_VARSIZE(cmptxt, VARHDRSZ + len + 1);
memcpy(VARDATA(cmptxt), workstr, len);
*(VARDATA(cmptxt) + len) = suffixchar;
cmpstr = PointerGetDatum(cmptxt);
if (datatype == NAMEOID)
{
cmptxt = palloc(len + 2);
memcpy(cmptxt, workstr, len);
cmptxt[len] = suffixchar;
cmptxt[len + 1] = '\0';
cmpstr = PointerGetDatum(cmptxt);
}
else
{
cmptxt = palloc(VARHDRSZ + len + 1);
SET_VARSIZE(cmptxt, VARHDRSZ + len + 1);
memcpy(VARDATA(cmptxt), workstr, len);
*(VARDATA(cmptxt) + len) = suffixchar;
cmpstr = PointerGetDatum(cmptxt);
}
}
}
@ -6518,7 +6526,7 @@ string_to_const(const char *str, Oid datatype)
break;
case NAMEOID:
collation = InvalidOid;
collation = C_COLLATION_OID;
constlen = NAMEDATALEN;
break;

5
src/backend/utils/adt/varchar.c
View File

@ -18,6 +18,7 @@
#include "access/hash.h"
#include "access/tuptoaster.h"
#include "catalog/pg_collation.h"
#include "catalog/pg_type.h"
#include "libpq/pqformat.h"
#include "nodes/nodeFuncs.h"
#include "utils/array.h"
@ -876,7 +877,7 @@ bpchar_sortsupport(PG_FUNCTION_ARGS)
oldcontext = MemoryContextSwitchTo(ssup->ssup_cxt);
/* Use generic string SortSupport */
varstr_sortsupport(ssup, collid, true);
varstr_sortsupport(ssup, BPCHAROID, collid);
MemoryContextSwitchTo(oldcontext);
@ -1085,7 +1086,7 @@ btbpchar_pattern_sortsupport(PG_FUNCTION_ARGS)
oldcontext = MemoryContextSwitchTo(ssup->ssup_cxt);
/* Use generic string SortSupport, forcing "C" collation */
varstr_sortsupport(ssup, C_COLLATION_OID, true);
varstr_sortsupport(ssup, BPCHAROID, C_COLLATION_OID);
MemoryContextSwitchTo(oldcontext);

126
src/backend/utils/adt/varlena.c
View File

@ -69,7 +69,7 @@ typedef struct
int last_returned; /* Last comparison result (cache) */
bool cache_blob; /* Does buf2 contain strxfrm() blob, etc? */
bool collate_c;
bool bpchar; /* Sorting bpchar, not varchar/text/bytea? */
Oid typeid; /* Actual datatype (text/bpchar/bytea/name) */
hyperLogLogState abbr_card; /* Abbreviated key cardinality state */
hyperLogLogState full_card; /* Full key cardinality state */
double prop_card; /* Required cardinality proportion */
@ -93,7 +93,10 @@ typedef struct
static int varstrfastcmp_c(Datum x, Datum y, SortSupport ssup);
static int bpcharfastcmp_c(Datum x, Datum y, SortSupport ssup);
static int varstrfastcmp_locale(Datum x, Datum y, SortSupport ssup);
static int namefastcmp_c(Datum x, Datum y, SortSupport ssup);
static int varlenafastcmp_locale(Datum x, Datum y, SortSupport ssup);
static int namefastcmp_locale(Datum x, Datum y, SortSupport ssup);
static int varstrfastcmp_locale(char *a1p, int len1, char *a2p, int len2, SortSupport ssup);
static int varstrcmp_abbrev(Datum x, Datum y, SortSupport ssup);
static Datum varstr_abbrev_convert(Datum original, SortSupport ssup);
static bool varstr_abbrev_abort(int memtupcount, SortSupport ssup);
@ -1814,7 +1817,7 @@ bttextsortsupport(PG_FUNCTION_ARGS)
oldcontext = MemoryContextSwitchTo(ssup->ssup_cxt);
/* Use generic string SortSupport */
varstr_sortsupport(ssup, collid, false);
varstr_sortsupport(ssup, TEXTOID, collid);
MemoryContextSwitchTo(oldcontext);
@ -1832,7 +1835,7 @@ bttextsortsupport(PG_FUNCTION_ARGS)
* this will not work with any other collation, though.
*/
void
varstr_sortsupport(SortSupport ssup, Oid collid, bool bpchar)
varstr_sortsupport(SortSupport ssup, Oid typeid, Oid collid)
{
bool abbreviate = ssup->abbreviate;
bool collate_c = false;
@ -1845,18 +1848,25 @@ varstr_sortsupport(SortSupport ssup, Oid collid, bool bpchar)
* overhead of a trip through the fmgr layer for every comparison, which
* can be substantial.
*
* Most typically, we'll set the comparator to varstrfastcmp_locale, which
* uses strcoll() to perform comparisons and knows about the special
* requirements of BpChar callers. However, if LC_COLLATE = C, we can
* make things quite a bit faster with varstrfastcmp_c or bpcharfastcmp_c,
* both of which use memcmp() rather than strcoll().
* Most typically, we'll set the comparator to varlenafastcmp_locale,
* which uses strcoll() to perform comparisons. We use that for the
* BpChar case too, but type NAME uses namefastcmp_locale. However, if
* LC_COLLATE = C, we can make things quite a bit faster with
* varstrfastcmp_c, bpcharfastcmp_c, or namefastcmp_c, all of which use
* memcmp() rather than strcoll().
*/
if (lc_collate_is_c(collid))
{
if (!bpchar)
ssup->comparator = varstrfastcmp_c;
else
if (typeid == BPCHAROID)
ssup->comparator = bpcharfastcmp_c;
else if (typeid == NAMEOID)
{
ssup->comparator = namefastcmp_c;
/* Not supporting abbreviation with type NAME, for now */
abbreviate = false;
}
else
ssup->comparator = varstrfastcmp_c;
collate_c = true;
}
@ -1897,7 +1907,17 @@ varstr_sortsupport(SortSupport ssup, Oid collid, bool bpchar)
return;
#endif
ssup->comparator = varstrfastcmp_locale;
/*
* We use varlenafastcmp_locale except for type NAME.
*/
if (typeid == NAMEOID)
{
ssup->comparator = namefastcmp_locale;
/* Not supporting abbreviation with type NAME, for now */
abbreviate = false;
}
else
ssup->comparator = varlenafastcmp_locale;
}
/*
@ -1963,7 +1983,7 @@ varstr_sortsupport(SortSupport ssup, Oid collid, bool bpchar)
*/
sss->cache_blob = true;
sss->collate_c = collate_c;
sss->bpchar = bpchar;
sss->typeid = typeid;
ssup->ssup_extra = sss;
/*
@ -2055,17 +2075,25 @@ bpcharfastcmp_c(Datum x, Datum y, SortSupport ssup)
}
/*
* sortsupport comparison func (for locale case)
* sortsupport comparison func (for NAME C locale case)
*/
static int
varstrfastcmp_locale(Datum x, Datum y, SortSupport ssup)
namefastcmp_c(Datum x, Datum y, SortSupport ssup)
{
Name arg1 = DatumGetName(x);
Name arg2 = DatumGetName(y);
return strncmp(NameStr(*arg1), NameStr(*arg2), NAMEDATALEN);
}
/*
* sortsupport comparison func (for locale case with all varlena types)
*/
static int
varlenafastcmp_locale(Datum x, Datum y, SortSupport ssup)
{
VarString *arg1 = DatumGetVarStringPP(x);
VarString *arg2 = DatumGetVarStringPP(y);
bool arg1_match;
VarStringSortSupport *sss = (VarStringSortSupport *) ssup->ssup_extra;
/* working state */
char *a1p,
*a2p;
int len1,
@ -2078,6 +2106,41 @@ varstrfastcmp_locale(Datum x, Datum y, SortSupport ssup)
len1 = VARSIZE_ANY_EXHDR(arg1);
len2 = VARSIZE_ANY_EXHDR(arg2);
result = varstrfastcmp_locale(a1p, len1, a2p, len2, ssup);
/* We can't afford to leak memory here. */
if (PointerGetDatum(arg1) != x)
pfree(arg1);
if (PointerGetDatum(arg2) != y)
pfree(arg2);
return result;
}
/*
* sortsupport comparison func (for locale case with NAME type)
*/
static int
namefastcmp_locale(Datum x, Datum y, SortSupport ssup)
{
Name arg1 = DatumGetName(x);
Name arg2 = DatumGetName(y);
return varstrfastcmp_locale(NameStr(*arg1), strlen(NameStr(*arg1)),
NameStr(*arg2), strlen(NameStr(*arg2)),
ssup);
}
/*
* sortsupport comparison func for locale cases
*/
static int
varstrfastcmp_locale(char *a1p, int len1, char *a2p, int len2, SortSupport ssup)
{
VarStringSortSupport *sss = (VarStringSortSupport *) ssup->ssup_extra;
int result;
bool arg1_match;
/* Fast pre-check for equality, as discussed in varstr_cmp() */
if (len1 == len2 && memcmp(a1p, a2p, len1) == 0)
{
@ -2094,11 +2157,10 @@ varstrfastcmp_locale(Datum x, Datum y, SortSupport ssup)
* (not limited to padding), so we need make no distinction between
* padding space characters and "real" space characters.
*/
result = 0;
goto done;
return 0;
}
if (sss->bpchar)
if (sss->typeid == BPCHAROID)
{
/* Get true number of bytes, ignoring trailing spaces */
len1 = bpchartruelen(a1p, len1);
@ -2152,8 +2214,7 @@ varstrfastcmp_locale(Datum x, Datum y, SortSupport ssup)
else if (arg1_match && !sss->cache_blob)
{
/* Use result cached following last actual strcoll() call */
result = sss->last_returned;
goto done;
return sss->last_returned;
}
if (sss->locale)
@ -2222,13 +2283,6 @@ varstrfastcmp_locale(Datum x, Datum y, SortSupport ssup)
/* Cache result, perhaps saving an expensive strcoll() call next time */
sss->cache_blob = false;
sss->last_returned = result;
done:
/* We can't afford to leak memory here. */
if (PointerGetDatum(arg1) != x)
pfree(arg1);
if (PointerGetDatum(arg2) != y)
pfree(arg2);
return result;
}
@ -2240,7 +2294,7 @@ varstrcmp_abbrev(Datum x, Datum y, SortSupport ssup)
{
/*
* When 0 is returned, the core system will call varstrfastcmp_c()
* (bpcharfastcmp_c() in BpChar case) or varstrfastcmp_locale(). Even a
* (bpcharfastcmp_c() in BpChar case) or varlenafastcmp_locale(). Even a
* strcmp() on two non-truncated strxfrm() blobs cannot indicate *equality*
* authoritatively, for the same reason that there is a strcoll()
* tie-breaker call to strcmp() in varstr_cmp().
@ -2279,7 +2333,7 @@ varstr_abbrev_convert(Datum original, SortSupport ssup)
len = VARSIZE_ANY_EXHDR(authoritative);
/* Get number of bytes, ignoring trailing spaces */
if (sss->bpchar)
if (sss->typeid == BPCHAROID)
len = bpchartruelen(authoritative_data, len);
/*
@ -2758,7 +2812,7 @@ bttext_pattern_sortsupport(PG_FUNCTION_ARGS)
oldcontext = MemoryContextSwitchTo(ssup->ssup_cxt);
/* Use generic string SortSupport, forcing "C" collation */
varstr_sortsupport(ssup, C_COLLATION_OID, false);
varstr_sortsupport(ssup, TEXTOID, C_COLLATION_OID);
MemoryContextSwitchTo(oldcontext);
@ -3798,7 +3852,7 @@ bytea_sortsupport(PG_FUNCTION_ARGS)
oldcontext = MemoryContextSwitchTo(ssup->ssup_cxt);
/* Use generic string SortSupport, forcing "C" collation */
varstr_sortsupport(ssup, C_COLLATION_OID, false);
varstr_sortsupport(ssup, BYTEAOID, C_COLLATION_OID);
MemoryContextSwitchTo(oldcontext);

2
src/include/catalog/catversion.h
View File

@ -53,6 +53,6 @@
*/
/* yyyymmddN */
#define CATALOG_VERSION_NO 201812182
#define CATALOG_VERSION_NO 201812191
#endif

2
src/include/catalog/pg_type.dat
View File

@ -54,7 +54,7 @@
typname => 'name', typlen => 'NAMEDATALEN', typbyval => 'f',
typcategory => 'S', typelem => 'char', typinput => 'namein',
typoutput => 'nameout', typreceive => 'namerecv', typsend => 'namesend',
typalign => 'c' },
typalign => 'c', typcollation => '950' },
{ oid => '20', array_type_oid => '1016',
descr => '~18 digit integer, 8-byte storage',
typname => 'int8', typlen => '8', typbyval => 'FLOAT8PASSBYVAL',

5
src/include/catalog/pg_type.h
View File

@ -211,8 +211,9 @@ CATALOG(pg_type,1247,TypeRelationId) BKI_BOOTSTRAP BKI_ROWTYPE_OID(71,TypeRelati
int32 typndims BKI_DEFAULT(0);
/*
* Collation: 0 if type cannot use collations, DEFAULT_COLLATION_OID for
* collatable base types, possibly other OID for domains
* Collation: 0 if type cannot use collations, nonzero (typically
* DEFAULT_COLLATION_OID) for collatable base types, possibly some other
* OID for domains over collatable types
*/
Oid typcollation BKI_DEFAULT(0);

2
src/include/utils/varlena.h
View File

@ -17,7 +17,7 @@
#include "utils/sortsupport.h"
extern int varstr_cmp(const char *arg1, int len1, const char *arg2, int len2, Oid collid);
extern void varstr_sortsupport(SortSupport ssup, Oid collid, bool bpchar);
extern void varstr_sortsupport(SortSupport ssup, Oid typeid, Oid collid);
extern int varstr_levenshtein(const char *source, int slen,
const char *target, int tlen,
int ins_c, int del_c, int sub_c,

8
src/pl/plpgsql/src/pl_comp.c
View File

@ -607,7 +607,7 @@ do_compile(FunctionCallInfo fcinfo,
var = plpgsql_build_variable("tg_name", 0,
plpgsql_build_datatype(NAMEOID,
-1,
InvalidOid),
function->fn_input_collation),
true);
Assert(var->dtype == PLPGSQL_DTYPE_VAR);
var->dtype = PLPGSQL_DTYPE_PROMISE;
@ -657,7 +657,7 @@ do_compile(FunctionCallInfo fcinfo,
var = plpgsql_build_variable("tg_relname", 0,
plpgsql_build_datatype(NAMEOID,
-1,
InvalidOid),
function->fn_input_collation),
true);
Assert(var->dtype == PLPGSQL_DTYPE_VAR);
var->dtype = PLPGSQL_DTYPE_PROMISE;
@ -667,7 +667,7 @@ do_compile(FunctionCallInfo fcinfo,
var = plpgsql_build_variable("tg_table_name", 0,
plpgsql_build_datatype(NAMEOID,
-1,
InvalidOid),
function->fn_input_collation),
true);
Assert(var->dtype == PLPGSQL_DTYPE_VAR);
var->dtype = PLPGSQL_DTYPE_PROMISE;
@ -677,7 +677,7 @@ do_compile(FunctionCallInfo fcinfo,
var = plpgsql_build_variable("tg_table_schema", 0,
plpgsql_build_datatype(NAMEOID,
-1,
InvalidOid),
function->fn_input_collation),
true);
Assert(var->dtype == PLPGSQL_DTYPE_VAR);
var->dtype = PLPGSQL_DTYPE_PROMISE;