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Postgres FD Implementation
Commit 7f0dccae authored by Heikki Linnakangas's avatar Heikki Linnakangas
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Turn much of the btree_gin macros into real functions. 

This makes the functions much nicer to read and edit, and also makes
debugging easier.
parent e7032610
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Showing with 173 additions and 202 deletions
contrib/btree_gin/btree_gin.c
View file @ 7f0dccae
......@@ -17,34 +17,30 @@
PG_MODULE_MAGIC;
typedef struct TypeInfo
{
bool is_varlena;
Datum (*leftmostvalue) (void);
Datum (*typecmp) (FunctionCallInfo);
} TypeInfo;
typedef struct QueryInfo
{
StrategyNumber strategy;
Datum datum;
bool is_varlena;
Datum (*typecmp) (FunctionCallInfo);
} QueryInfo;
#define GIN_EXTRACT_VALUE(type) \
PG_FUNCTION_INFO_V1(gin_extract_value_##type); \
Datum \
gin_extract_value_##type(PG_FUNCTION_ARGS) \
{ \
Datum datum = PG_GETARG_DATUM(0); \
int32 *nentries = (int32 *) PG_GETARG_POINTER(1); \
Datum *entries = (Datum *) palloc(sizeof(Datum)); \
\
if ( TypeInfo_##type.is_varlena ) \
datum = PointerGetDatum(PG_DETOAST_DATUM(datum)); \
entries[0] = datum; \
*nentries = 1; \
\
PG_RETURN_POINTER(entries); \
/*** GIN support functions shared by all datatypes ***/
static Datum
gin_btree_extract_value(FunctionCallInfo fcinfo, bool is_varlena)
{
Datum datum = PG_GETARG_DATUM(0);
int32 *nentries = (int32 *) PG_GETARG_POINTER(1);
Datum *entries = (Datum *) palloc(sizeof(Datum));
if (is_varlena)
datum = PointerGetDatum(PG_DETOAST_DATUM(datum));
entries[0] = datum;
*nentries = 1;
PG_RETURN_POINTER(entries);
}
/*
......@@ -55,49 +51,51 @@ gin_extract_value_##type(PG_FUNCTION_ARGS) \
* key, and work forward until the supplied query datum (which must be
* sent along inside the QueryInfo structure).
*/
static Datum
gin_btree_extract_query(FunctionCallInfo fcinfo,
bool is_varlena,
Datum (*leftmostvalue) (void),
Datum (*typecmp) (FunctionCallInfo))
{
Datum datum = PG_GETARG_DATUM(0);
int32 *nentries = (int32 *) PG_GETARG_POINTER(1);
StrategyNumber strategy = PG_GETARG_UINT16(2);
bool **partialmatch = (bool **) PG_GETARG_POINTER(3);
Pointer **extra_data = (Pointer **) PG_GETARG_POINTER(4);
Datum *entries = (Datum *) palloc(sizeof(Datum));
QueryInfo *data = (QueryInfo *) palloc(sizeof(QueryInfo));
bool *ptr_partialmatch;
*nentries = 1;
ptr_partialmatch = *partialmatch = (bool *) palloc(sizeof(bool));
*ptr_partialmatch = false;
if (is_varlena)
datum = PointerGetDatum(PG_DETOAST_DATUM(datum));
data->strategy = strategy;
data->datum = datum;
data->is_varlena = is_varlena;
data->typecmp = typecmp;
*extra_data = (Pointer *) palloc(sizeof(Pointer));
**extra_data = (Pointer) data;
switch (strategy)
{
case BTLessStrategyNumber:
case BTLessEqualStrategyNumber:
entries[0] = leftmostvalue();
*ptr_partialmatch = true;
break;
case BTGreaterEqualStrategyNumber:
case BTGreaterStrategyNumber:
*ptr_partialmatch = true;
case BTEqualStrategyNumber:
entries[0] = datum;
break;
default:
elog(ERROR, "unrecognized strategy number: %d", strategy);
}
#define GIN_EXTRACT_QUERY(type) \
PG_FUNCTION_INFO_V1(gin_extract_query_##type); \
Datum \
gin_extract_query_##type(PG_FUNCTION_ARGS) \
{ \
Datum datum = PG_GETARG_DATUM(0); \
int32 *nentries = (int32 *) PG_GETARG_POINTER(1); \
StrategyNumber strategy = PG_GETARG_UINT16(2); \
bool **partialmatch = (bool **) PG_GETARG_POINTER(3); \
Pointer **extra_data = (Pointer **) PG_GETARG_POINTER(4); \
Datum *entries = (Datum *) palloc(sizeof(Datum)); \
QueryInfo *data = (QueryInfo *) palloc(sizeof(QueryInfo)); \
bool *ptr_partialmatch; \
\
*nentries = 1; \
ptr_partialmatch = *partialmatch = (bool *) palloc(sizeof(bool)); \
*ptr_partialmatch = false; \
if ( TypeInfo_##type.is_varlena ) \
datum = PointerGetDatum(PG_DETOAST_DATUM(datum)); \
data->strategy = strategy; \
data->datum = datum; \
*extra_data = (Pointer *) palloc(sizeof(Pointer)); \
**extra_data = (Pointer) data; \
\
switch (strategy) \
{ \
case BTLessStrategyNumber: \
case BTLessEqualStrategyNumber: \
entries[0] = TypeInfo_##type.leftmostvalue(); \
*ptr_partialmatch = true; \
break; \
case BTGreaterEqualStrategyNumber: \
case BTGreaterStrategyNumber: \
*ptr_partialmatch = true; \
case BTEqualStrategyNumber: \
entries[0] = datum; \
break; \
default: \
elog(ERROR, "unrecognized strategy number: %d", strategy); \
} \
\
PG_RETURN_POINTER(entries); \
PG_RETURN_POINTER(entries);
}
/*
......@@ -105,78 +103,70 @@ gin_extract_query_##type(PG_FUNCTION_ARGS) \
* strategy it is a left-most value. So, use original datum from QueryInfo
* to decide to stop scanning or not. Datum b is always from index.
*/
#define GIN_COMPARE_PREFIX(type) \
PG_FUNCTION_INFO_V1(gin_compare_prefix_##type); \
Datum \
gin_compare_prefix_##type(PG_FUNCTION_ARGS) \
{ \
Datum a = PG_GETARG_DATUM(0); \
Datum b = PG_GETARG_DATUM(1); \
QueryInfo *data = (QueryInfo *) PG_GETARG_POINTER(3); \
int32 res, \
cmp; \
\
cmp = DatumGetInt32(DirectFunctionCall2Coll( \
TypeInfo_##type.typecmp, \
PG_GET_COLLATION(), \
(data->strategy == BTLessStrategyNumber || \
data->strategy == BTLessEqualStrategyNumber) \
? data->datum : a, \
b)); \
\
switch (data->strategy) \
{ \
case BTLessStrategyNumber: \
/* If original datum > indexed one then return match */ \
if (cmp > 0) \
res = 0; \
else \
res = 1; \
break; \
case BTLessEqualStrategyNumber: \
/* The same except equality */ \
if (cmp >= 0) \
res = 0; \
else \
res = 1; \
break; \
case BTEqualStrategyNumber: \
if (cmp != 0) \
res = 1; \
else \
res = 0; \
break; \
case BTGreaterEqualStrategyNumber: \
/* If original datum <= indexed one then return match */ \
if (cmp <= 0) \
res = 0; \
else \
res = 1; \
break; \
case BTGreaterStrategyNumber: \
/* If original datum <= indexed one then return match */ \
/* If original datum == indexed one then continue scan */ \
if (cmp < 0) \
res = 0; \
else if (cmp == 0) \
res = -1; \
else \
res = 1; \
break; \
default: \
elog(ERROR, "unrecognized strategy number: %d", \
data->strategy); \
res = 0; \
} \
\
PG_RETURN_INT32(res); \
}
#define GIN_SUPPORT(type) \
GIN_EXTRACT_VALUE(type) \
GIN_EXTRACT_QUERY(type) \
GIN_COMPARE_PREFIX(type)
static Datum
gin_btree_compare_prefix(FunctionCallInfo fcinfo)
{
Datum a = PG_GETARG_DATUM(0);
Datum b = PG_GETARG_DATUM(1);
QueryInfo *data = (QueryInfo *) PG_GETARG_POINTER(3);
int32 res,
cmp;
cmp = DatumGetInt32(DirectFunctionCall2Coll(
data->typecmp,
PG_GET_COLLATION(),
(data->strategy == BTLessStrategyNumber ||
data->strategy == BTLessEqualStrategyNumber)
? data->datum : a,
b));
switch (data->strategy)
{
case BTLessStrategyNumber:
/* If original datum > indexed one then return match */
if (cmp > 0)
res = 0;
else
res = 1;
break;
case BTLessEqualStrategyNumber:
/* The same except equality */
if (cmp >= 0)
res = 0;
else
res = 1;
break;
case BTEqualStrategyNumber:
if (cmp != 0)
res = 1;
else
res = 0;
break;
case BTGreaterEqualStrategyNumber:
/* If original datum <= indexed one then return match */
if (cmp <= 0)
res = 0;
else
res = 1;
break;
case BTGreaterStrategyNumber:
/* If original datum <= indexed one then return match */
/* If original datum == indexed one then continue scan */
if (cmp < 0)
res = 0;
else if (cmp == 0)
res = -1;
else
res = 1;
break;
default:
elog(ERROR, "unrecognized strategy number: %d",
data->strategy);
res = 0;
}
PG_RETURN_INT32(res);
}
PG_FUNCTION_INFO_V1(gin_btree_consistent);
Datum
......@@ -188,23 +178,45 @@ gin_btree_consistent(PG_FUNCTION_ARGS)
PG_RETURN_BOOL(true);
}
/*** GIN_SUPPORT macro defines the datatype specific functions ***/
#define GIN_SUPPORT(type, is_varlena, leftmostvalue, typecmp) \
PG_FUNCTION_INFO_V1(gin_extract_value_##type); \
Datum \
gin_extract_value_##type(PG_FUNCTION_ARGS) \
{ \
return gin_btree_extract_value(fcinfo, is_varlena); \
} \
PG_FUNCTION_INFO_V1(gin_extract_query_##type); \
Datum \
gin_extract_query_##type(PG_FUNCTION_ARGS) \
{ \
return gin_btree_extract_query(fcinfo, \
is_varlena, leftmostvalue, typecmp); \
} \
PG_FUNCTION_INFO_V1(gin_compare_prefix_##type); \
Datum \
gin_compare_prefix_##type(PG_FUNCTION_ARGS) \
{ \
return gin_btree_compare_prefix(fcinfo); \
}
/*** Datatype specifications ***/
static Datum
leftmostvalue_int2(void)
{
return Int16GetDatum(SHRT_MIN);
}
static TypeInfo TypeInfo_int2 = {false, leftmostvalue_int2, btint2cmp};
GIN_SUPPORT(int2)
GIN_SUPPORT(int2, false, leftmostvalue_int2, btint2cmp)
static Datum
leftmostvalue_int4(void)
{
return Int32GetDatum(INT_MIN);
}
static TypeInfo TypeInfo_int4 = {false, leftmostvalue_int4, btint4cmp};
GIN_SUPPORT(int4)
GIN_SUPPORT(int4, false, leftmostvalue_int4, btint4cmp)
static Datum
leftmostvalue_int8(void)
......@@ -214,27 +226,21 @@ leftmostvalue_int8(void)
*/
return Int64GetDatum(SEQ_MINVALUE);
}
static TypeInfo TypeInfo_int8 = {false, leftmostvalue_int8, btint8cmp};
GIN_SUPPORT(int8)
GIN_SUPPORT(int8, false, leftmostvalue_int8, btint8cmp)
static Datum
leftmostvalue_float4(void)
{
return Float4GetDatum(-get_float4_infinity());
}
static TypeInfo TypeInfo_float4 = {false, leftmostvalue_float4, btfloat4cmp};
GIN_SUPPORT(float4)
GIN_SUPPORT(float4, false, leftmostvalue_float4, btfloat4cmp)
static Datum
leftmostvalue_float8(void)
{
return Float8GetDatum(-get_float8_infinity());
}
static TypeInfo TypeInfo_float8 = {false, leftmostvalue_float8, btfloat8cmp};
GIN_SUPPORT(float8)
GIN_SUPPORT(float8, false, leftmostvalue_float8, btfloat8cmp)
static Datum
leftmostvalue_money(void)
......@@ -244,40 +250,30 @@ leftmostvalue_money(void)
*/
return Int64GetDatum(SEQ_MINVALUE);
}
static TypeInfo TypeInfo_money = {false, leftmostvalue_money, cash_cmp};
GIN_SUPPORT(money)
GIN_SUPPORT(money, false, leftmostvalue_money, cash_cmp)
static Datum
leftmostvalue_oid(void)
{
return ObjectIdGetDatum(0);
}
static TypeInfo TypeInfo_oid = {false, leftmostvalue_oid, btoidcmp};
GIN_SUPPORT(oid)
GIN_SUPPORT(oid, false, leftmostvalue_oid, btoidcmp)
static Datum
leftmostvalue_timestamp(void)
{
return TimestampGetDatum(DT_NOBEGIN);
}
static TypeInfo TypeInfo_timestamp = {false, leftmostvalue_timestamp, timestamp_cmp};
GIN_SUPPORT(timestamp)
static TypeInfo TypeInfo_timestamptz = {false, leftmostvalue_timestamp, timestamp_cmp};
GIN_SUPPORT(timestamp, false, leftmostvalue_timestamp, timestamp_cmp)
GIN_SUPPORT(timestamptz)
GIN_SUPPORT(timestamptz, false, leftmostvalue_timestamp, timestamp_cmp)
static Datum
leftmostvalue_time(void)
{
return TimeADTGetDatum(0);
}
static TypeInfo TypeInfo_time = {false, leftmostvalue_time, time_cmp};
GIN_SUPPORT(time)
GIN_SUPPORT(time, false, leftmostvalue_time, time_cmp)
static Datum
leftmostvalue_timetz(void)
......@@ -289,18 +285,14 @@ leftmostvalue_timetz(void)
return TimeTzADTPGetDatum(v);
}
static TypeInfo TypeInfo_timetz = {false, leftmostvalue_timetz, timetz_cmp};
GIN_SUPPORT(timetz)
GIN_SUPPORT(timetz, false, leftmostvalue_timetz, timetz_cmp)
static Datum
leftmostvalue_date(void)
{
return DateADTGetDatum(DATEVAL_NOBEGIN);
}
static TypeInfo TypeInfo_date = {false, leftmostvalue_date, date_cmp};
GIN_SUPPORT(date)
GIN_SUPPORT(date, false, leftmostvalue_date, date_cmp)
static Datum
leftmostvalue_interval(void)
......@@ -312,9 +304,7 @@ leftmostvalue_interval(void)
v->month = 0;
return IntervalPGetDatum(v);
}
static TypeInfo TypeInfo_interval = {false, leftmostvalue_interval, interval_cmp};
GIN_SUPPORT(interval)
GIN_SUPPORT(interval, false, leftmostvalue_interval, interval_cmp)
static Datum
leftmostvalue_macaddr(void)
......@@ -323,9 +313,7 @@ leftmostvalue_macaddr(void)
return MacaddrPGetDatum(v);
}
static TypeInfo TypeInfo_macaddr = {false, leftmostvalue_macaddr, macaddr_cmp};
GIN_SUPPORT(macaddr)
GIN_SUPPORT(macaddr, false, leftmostvalue_macaddr, macaddr_cmp)
static Datum
leftmostvalue_inet(void)
......@@ -335,35 +323,25 @@ leftmostvalue_inet(void)
ObjectIdGetDatum(0),
Int32GetDatum(-1));
}
static TypeInfo TypeInfo_inet = {true, leftmostvalue_inet, network_cmp};
GIN_SUPPORT(inet, true, leftmostvalue_inet, network_cmp)
GIN_SUPPORT(inet)
static TypeInfo TypeInfo_cidr = {true, leftmostvalue_inet, network_cmp};
GIN_SUPPORT(cidr)
GIN_SUPPORT(cidr, true, leftmostvalue_inet, network_cmp)
static Datum
leftmostvalue_text(void)
{
return PointerGetDatum(cstring_to_text_with_len("", 0));
}
static TypeInfo TypeInfo_text = {true, leftmostvalue_text, bttextcmp};
GIN_SUPPORT(text)
GIN_SUPPORT(text, true, leftmostvalue_text, bttextcmp)
static Datum
leftmostvalue_char(void)
{
return CharGetDatum(SCHAR_MIN);
}
static TypeInfo TypeInfo_char = {false, leftmostvalue_char, btcharcmp};
GIN_SUPPORT(char)
static TypeInfo TypeInfo_bytea = {true, leftmostvalue_text, byteacmp};
GIN_SUPPORT(char, false, leftmostvalue_char, btcharcmp)
GIN_SUPPORT(bytea)
GIN_SUPPORT(bytea, true, leftmostvalue_text, byteacmp)
static Datum
leftmostvalue_bit(void)
......@@ -373,9 +351,7 @@ leftmostvalue_bit(void)
ObjectIdGetDatum(0),
Int32GetDatum(-1));
}
static TypeInfo TypeInfo_bit = {true, leftmostvalue_bit, bitcmp};
GIN_SUPPORT(bit)
GIN_SUPPORT(bit, true, leftmostvalue_bit, bitcmp)
static Datum
leftmostvalue_varbit(void)
......@@ -385,9 +361,7 @@ leftmostvalue_varbit(void)
ObjectIdGetDatum(0),
Int32GetDatum(-1));
}
static TypeInfo TypeInfo_varbit = {true, leftmostvalue_varbit, bitcmp};
GIN_SUPPORT(varbit)
GIN_SUPPORT(varbit, true, leftmostvalue_varbit, bitcmp)
/*
* Numeric type hasn't a real left-most value, so we use PointerGetDatum(NULL)
......@@ -431,7 +405,4 @@ leftmostvalue_numeric(void)
{
return PointerGetDatum(NULL);
}
static TypeInfo TypeInfo_numeric = {true, leftmostvalue_numeric, gin_numeric_cmp};
GIN_SUPPORT(numeric)
GIN_SUPPORT(numeric, true, leftmostvalue_numeric, gin_numeric_cmp)
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