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arrow_types.c
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arrow_types.c
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/*
* arrow_types.c
*
* intermediation of PostgreSQL types <--> Apache Arrow types
*
* Copyright 2018-2019 (C) KaiGai Kohei <kaigai@heterodb.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the PostgreSQL License. See the LICENSE file.
*/
#include "pg2arrow.h"
/* ----------------------------------------------------------------
*
* put_value handler for each data types (optional)
*
* ----------------------------------------------------------------
*/
static void
put_inline_bool_value(SQLattribute *attr,
const char *addr, int sz)
{
size_t row_index = attr->nitems++;
if (!addr)
{
attr->nullcount++;
sql_buffer_clrbit(&attr->nullmap, row_index);
sql_buffer_clrbit(&attr->values, row_index);
}
else
{
sql_buffer_setbit(&attr->nullmap, row_index);
sql_buffer_setbit(&attr->values, row_index);
}
}
static void
put_inline_8b_value(SQLattribute *attr,
const char *addr, int sz)
{
size_t row_index = attr->nitems++;
if (!addr)
{
attr->nullcount++;
sql_buffer_clrbit(&attr->nullmap, row_index);
sql_buffer_append_zero(&attr->values, sizeof(char));
}
else
{
sql_buffer_setbit(&attr->nullmap, row_index);
sql_buffer_append(&attr->values, addr, sz);
}
}
static void
put_inline_16b_value(SQLattribute *attr,
const char *addr, int sz)
{
size_t row_index = attr->nitems++;
uint16 value;
if (!addr)
{
attr->nullcount++;
sql_buffer_clrbit(&attr->nullmap, row_index);
sql_buffer_append_zero(&attr->values, sizeof(uint16));
}
else
{
value = ntohs(*((const uint16 *)addr));
sql_buffer_setbit(&attr->nullmap, row_index);
sql_buffer_append(&attr->values, &value, sz);
}
}
static void
put_inline_32b_value(SQLattribute *attr,
const char *addr, int sz)
{
size_t row_index = attr->nitems++;
uint32 value;
assert(attr->attlen == sizeof(uint32));
if (!addr)
{
attr->nullcount++;
sql_buffer_clrbit(&attr->nullmap, row_index);
sql_buffer_append_zero(&attr->values, sizeof(uint32));
}
else
{
assert(sz == sizeof(uint32));
value = ntohl(*((const uint32 *)addr));
sql_buffer_setbit(&attr->nullmap, row_index);
sql_buffer_append(&attr->values, &value, sz);
}
}
static void
put_inline_64b_value(SQLattribute *attr,
const char *addr, int sz)
{
size_t row_index = attr->nitems++;
uint64 value;
uint32 h, l;
if (!addr)
{
attr->nullcount++;
sql_buffer_clrbit(&attr->nullmap, row_index);
sql_buffer_append_zero(&attr->values, sizeof(uint64));
}
else
{
h = ntohl(*((const uint32 *)(addr)));
l = ntohl(*((const uint32 *)(addr + sizeof(uint32))));
value = (uint64)h << 32 | (uint64)l;
sql_buffer_setbit(&attr->nullmap, row_index);
sql_buffer_append(&attr->values, &value, sz);
}
}
#ifdef PG_INT128_TYPE
/* parameters of Numeric type */
#define NUMERIC_SIGN_MASK 0xC000
#define NUMERIC_POS 0x0000
#define NUMERIC_NEG 0x4000
#define NUMERIC_NAN 0xC000
#define NBASE 10000
#define HALF_NBASE 5000
#define DEC_DIGITS 4 /* decimal digits per NBASE digit */
#define MUL_GUARD_DIGITS 2 /* these are measured in NBASE digits */
#define DIV_GUARD_DIGITS 4
typedef int16 NumericDigit;
static void
put_decimal_value(SQLattribute *attr,
const char *addr, int sz)
{
size_t row_index = attr->nitems++;
if (!addr)
{
attr->nullcount++;
sql_buffer_clrbit(&attr->nullmap, row_index);
sql_buffer_append_zero(&attr->values, sizeof(int128));
}
else
{
struct {
int16 ndigits;
int16 weight; /* weight of first digit */
int16 sign; /* NUMERIC_(POS|NEG|NAN) */
int16 dscale; /* display scale */
NumericDigit digits[FLEXIBLE_ARRAY_MEMBER];
} *rawdata = (void *)addr;
int ndigits = ntohs(rawdata->ndigits);
int weight = ntohs(rawdata->weight);
int sign = ntohs(rawdata->sign);
//int dscale = ntohs(rawdata->dscale);
//int precision = attr->arrow_type.Decimal.precision;
int ascale = attr->arrow_type.Decimal.scale;
int128 value = 0;
int d, dig;
if ((sign & NUMERIC_SIGN_MASK) == NUMERIC_NAN)
Elog("Decimal128 cannot map NaN in PostgreSQL Numeric");
/* makes integer portion first */
for (d=0; d <= weight; d++)
{
dig = (d < ndigits) ? ntohs(rawdata->digits[d]) : 0;
if (dig < 0 || dig >= NBASE)
Elog("Numeric digit is out of range: %d", (int)dig);
value = NBASE * value + (int128)dig;
}
/* makes floating point portion if any */
while (ascale > 0)
{
dig = (d >= 0 && d < ndigits) ? ntohs(rawdata->digits[d]) : 0;
if (dig < 0 || dig >= NBASE)
Elog("Numeric digit is out of range: %d", (int)dig);
if (ascale >= DEC_DIGITS)
value = NBASE * value + dig;
else if (ascale == 3)
value = 1000L * value + dig / 10L;
else if (ascale == 2)
value = 100L * value + dig / 100L;
else if (ascale == 1)
value = 10L * value + dig / 1000L;
else
Elog("internal bug");
ascale -= DEC_DIGITS;
d++;
}
/* is it a negative value? */
if ((sign & NUMERIC_NEG) != 0)
value = -value;
sql_buffer_setbit(&attr->nullmap, row_index);
sql_buffer_append(&attr->values, &value, sizeof(value));
}
}
#endif
static void
put_date_value(SQLattribute *attr,
const char *addr, int sz)
{
size_t row_index = attr->nitems++;
if (!addr)
{
attr->nullcount++;
sql_buffer_clrbit(&attr->nullmap, row_index);
sql_buffer_append_zero(&attr->values, attr->attlen);
}
else
{
DateADT value;
assert(sz == sizeof(DateADT));
sql_buffer_setbit(&attr->nullmap, row_index);
value = ntohl(*((const DateADT *)addr));
value += (POSTGRES_EPOCH_JDATE - UNIX_EPOCH_JDATE);
sql_buffer_append(&attr->values, &value, sz);
}
}
static void
put_timestamp_value(SQLattribute *attr,
const char *addr, int sz)
{
size_t row_index = attr->nitems++;
if (!addr)
{
attr->nullcount++;
sql_buffer_clrbit(&attr->nullmap, row_index);
sql_buffer_append_zero(&attr->values, attr->attlen);
}
else
{
Timestamp value;
uint32 h, l;
assert(sz == sizeof(Timestamp));
sql_buffer_setbit(&attr->nullmap, row_index);
h = ((const uint32 *)addr)[0];
l = ((const uint32 *)addr)[1];
value = (Timestamp)ntohl(h) << 32 | (Timestamp)ntohl(l);
/* convert PostgreSQL epoch to UNIX epoch */
value += (POSTGRES_EPOCH_JDATE -
UNIX_EPOCH_JDATE) * USECS_PER_DAY;
sql_buffer_append(&attr->values, &value, sizeof(Timestamp));
}
}
static void
put_variable_value(SQLattribute *attr,
const char *addr, int sz)
{
size_t row_index = attr->nitems++;
if (row_index == 0)
sql_buffer_append_zero(&attr->values, sizeof(uint32));
if (!addr)
{
attr->nullcount++;
sql_buffer_clrbit(&attr->nullmap, row_index);
sql_buffer_append(&attr->values, &attr->extra.usage, sizeof(uint32));
}
else
{
sql_buffer_setbit(&attr->nullmap, row_index);
sql_buffer_append(&attr->extra, addr, sz);
sql_buffer_append(&attr->values, &attr->extra.usage, sizeof(uint32));
}
}
static void
put_bpchar_value(SQLattribute *attr,
const char *addr, int sz)
{
size_t row_index = attr->nitems++;
if (row_index == 0)
sql_buffer_append_zero(&attr->values, sizeof(uint32));
if (!addr)
{
attr->nullcount++;
sql_buffer_clrbit(&attr->nullmap, row_index);
sql_buffer_append(&attr->values, &attr->extra.usage, sizeof(uint32));
}
else
{
char *temp = alloca(sz+1);
/* trim spaces in the tail */
memcpy(temp, addr, sz);
while (sz > 0 && temp[sz-1]==' ')
sz--;
sql_buffer_setbit(&attr->nullmap, row_index);
sql_buffer_append(&attr->extra, addr, sz);
sql_buffer_append(&attr->values, &attr->extra.usage, sizeof(uint32));
}
}
static void
put_array_value(SQLattribute *attr,
const char *addr, int sz)
{
SQLattribute *element = attr->element;
size_t row_index = attr->nitems++;
if (row_index == 0)
sql_buffer_append_zero(&attr->values, sizeof(uint32));
if (!addr)
{
attr->nullcount++;
sql_buffer_clrbit(&attr->nullmap, row_index);
sql_buffer_append(&attr->values, &element->nitems, sizeof(int32));
}
else
{
static bool notification_has_printed = false;
struct {
int32 ndim;
int32 hasnull;
int32 element_type;
struct {
int32 sz;
int32 lb;
} dim[FLEXIBLE_ARRAY_MEMBER];
} *rawdata = (void *) addr;
int32 ndim = ntohl(rawdata->ndim);
//int32 hasnull = ntohl(rawdata->hasnull);
Oid element_type = ntohl(rawdata->element_type);
size_t i, nitems = 1;
int item_sz;
char *pos;
if (element_type != element->atttypid)
Elog("PostgreSQL array type mismatch");
if (ndim < 1)
Elog("Invalid dimension size of PostgreSQL Array (ndim=%d)", ndim);
if (ndim > 1 && !notification_has_printed)
{
fprintf(stderr, "Notice: multi-dimensional PostgreSQL Array is extracted to List<%s> type in Apache Arrow, due to data type restrictions", attr->arrow_typename);
notification_has_printed = true;
}
for (i=0; i < ndim; i++)
nitems *= ntohl(rawdata->dim[i].sz);
pos = (char *)&rawdata->dim[ndim];
for (i=0; i < nitems; i++)
{
if (pos + sizeof(int32) > addr + sz)
Elog("out of range - binary array has corruption");
item_sz = ntohl(*((int32 *)pos));
pos += sizeof(int32);
if (item_sz < 0)
element->put_value(element, NULL, 0);
else
{
element->put_value(element, pos, item_sz);
pos += item_sz;
}
}
sql_buffer_setbit(&attr->nullmap, row_index);
sql_buffer_append(&attr->values, &element->nitems, sizeof(int32));
}
}
static void
put_composite_value(SQLattribute *attr,
const char *addr, int sz)
{
/* see record_send() */
SQLtable *subtypes = attr->subtypes;
size_t row_index = attr->nitems++;
size_t usage = 0;
int j, nvalids;
if (!addr)
{
attr->nullcount++;
sql_buffer_clrbit(&attr->nullmap, row_index);
usage += ARROWALIGN(attr->nullmap.usage);
/* NULL for all the subtypes */
for (j=0; j < subtypes->nfields; j++)
{
SQLattribute *subattr = &subtypes->attrs[j];
subattr->put_value(subattr, NULL, 0);
}
}
else
{
const char *pos = addr;
sql_buffer_setbit(&attr->nullmap, row_index);
if (sz < sizeof(uint32))
Elog("binary composite record corruption");
if (attr->nullcount > 0)
usage += ARROWALIGN(attr->nullmap.usage);
nvalids = ntohl(*((const int *)pos));
pos += sizeof(int);
for (j=0; j < subtypes->nfields; j++)
{
SQLattribute *subattr = &subtypes->attrs[j];
Oid atttypid;
int attlen;
assert(subattr->nitems == row_index);
if (j >= nvalids)
{
subattr->put_value(subattr, NULL, 0);
continue;
}
if ((pos - addr) + sizeof(Oid) + sizeof(int) > sz)
Elog("binary composite record corruption");
atttypid = ntohl(*((Oid *)pos));
pos += sizeof(Oid);
if (subattr->atttypid != atttypid)
Elog("composite subtype mismatch");
attlen = ntohl(*((int *)pos));
pos += sizeof(int);
if (attlen == -1)
{
subattr->put_value(subattr, NULL, 0);
}
else
{
if ((pos - addr) + attlen > sz)
Elog("binary composite record corruption");
subattr->put_value(subattr, pos, attlen);
pos += attlen;
}
}
}
}
static void
put_dictionary_value(SQLattribute *attr,
const char *addr, int sz)
{
size_t row_index = attr->nitems++;
if (!addr)
{
attr->nullcount++;
sql_buffer_clrbit(&attr->nullmap, row_index);
sql_buffer_append_zero(&attr->values, sizeof(uint32));
}
else
{
SQLdictionary *enumdict = attr->enumdict;
hashItem *hitem;
uint32 hash;
hash = hash_any((const unsigned char *)addr, sz);
for (hitem = enumdict->hslots[hash % enumdict->nslots];
hitem != NULL;
hitem = hitem->next)
{
if (hitem->hash == hash &&
hitem->label_len == sz &&
memcmp(hitem->label, addr, sz) == 0)
break;
}
if (!hitem)
Elog("Enum label was not found in pg_enum result");
sql_buffer_setbit(&attr->nullmap, row_index);
sql_buffer_append(&attr->values, &hitem->index, sizeof(int32));
}
}
/* ----------------------------------------------------------------
*
* buffer_usage handler for each data types
*
* ---------------------------------------------------------------- */
static size_t
buffer_usage_inline_type(SQLattribute *attr)
{
size_t usage;
usage = ARROWALIGN(attr->values.usage);
if (attr->nullcount > 0)
usage += ARROWALIGN(attr->nullmap.usage);
return usage;
}
static size_t
buffer_usage_varlena_type(SQLattribute *attr)
{
size_t usage;
usage = (ARROWALIGN(attr->values.usage) +
ARROWALIGN(attr->extra.usage));
if (attr->nullcount > 0)
usage += ARROWALIGN(attr->nullmap.usage);
return usage;
}
static size_t
buffer_usage_array_type(SQLattribute *attr)
{
SQLattribute *element = attr->element;
size_t usage;
usage = ARROWALIGN(attr->values.usage);
if (attr->nullcount > 0)
usage += ARROWALIGN(attr->nullmap.usage);
usage += element->buffer_usage(element);
return usage;
}
static size_t
buffer_usage_composite_type(SQLattribute *attr)
{
SQLtable *subtypes = attr->subtypes;
size_t usage = 0;
int j;
if (attr->nullcount > 0)
usage += ARROWALIGN(attr->nullmap.usage);
for (j=0; j < subtypes->nfields; j++)
{
SQLattribute *subattr = &subtypes->attrs[j];
usage += subattr->buffer_usage(subattr);
}
return usage;
}
/* ----------------------------------------------------------------
*
* stat_update handler for each data types (optional)
*
* ---------------------------------------------------------------- */
#define STAT_UPDATE_INLINE_TEMPLATE(TYPENAME,TO_DATUM) \
static void \
stat_update_##TYPENAME##_value(SQLattribute *attr, \
const char *addr, int sz) \
{ \
TYPENAME value; \
\
if (!addr) \
return; \
value = *((const TYPENAME *)addr); \
if (attr->min_isnull) \
{ \
attr->min_isnull = false; \
attr->min_value = TO_DATUM(value); \
} \
else if (value < attr->min_value) \
attr->min_value = value; \
\
if (attr->max_isnull) \
{ \
attr->max_isnull = false; \
attr->max_value = TO_DATUM(value); \
} \
else if (value > attr->max_value) \
attr->max_value = value; \
}
STAT_UPDATE_INLINE_TEMPLATE(int8, Int8GetDatum)
STAT_UPDATE_INLINE_TEMPLATE(int16, Int16GetDatum)
STAT_UPDATE_INLINE_TEMPLATE(int32, Int32GetDatum)
STAT_UPDATE_INLINE_TEMPLATE(int64, Int64GetDatum)
STAT_UPDATE_INLINE_TEMPLATE(float4, Float4GetDatum)
STAT_UPDATE_INLINE_TEMPLATE(float8, Float8GetDatum)
/* ----------------------------------------------------------------
*
* setup_buffer handler for each data types
*
* ----------------------------------------------------------------
*/
static inline size_t
setup_arrow_buffer(ArrowBuffer *node, size_t offset, size_t length)
{
memset(node, 0, sizeof(ArrowBuffer));
node->tag = ArrowNodeTag__Buffer;
node->offset = offset;
node->length = ARROWALIGN(length);
return node->length;
}
static int
setup_buffer_inline_type(SQLattribute *attr,
ArrowBuffer *node, size_t *p_offset)
{
size_t offset = *p_offset;
/* nullmap */
if (attr->nullcount == 0)
offset += setup_arrow_buffer(node, offset, 0);
else
offset += setup_arrow_buffer(node, offset, attr->nullmap.usage);
/* inline values */
offset += setup_arrow_buffer(node+1, offset, attr->values.usage);
*p_offset = offset;
return 2; /* nullmap + values */
}
static int
setup_buffer_varlena_type(SQLattribute *attr,
ArrowBuffer *node, size_t *p_offset)
{
size_t offset = *p_offset;
/* nullmap */
if (attr->nullcount == 0)
offset += setup_arrow_buffer(node, offset, 0);
else
offset += setup_arrow_buffer(node, offset, attr->nullmap.usage);
/* index values */
offset += setup_arrow_buffer(node+1, offset, attr->values.usage);
/* extra buffer */
offset += setup_arrow_buffer(node+2, offset, attr->extra.usage);
*p_offset = offset;
return 3; /* nullmap + values (index) + extra buffer */
}
static int
setup_buffer_array_type(SQLattribute *attr,
ArrowBuffer *node, size_t *p_offset)
{
SQLattribute *element = attr->element;
int count = 2;
/* nullmap */
if (attr->nullcount == 0)
*p_offset += setup_arrow_buffer(node, *p_offset, 0);
else
*p_offset += setup_arrow_buffer(node, *p_offset,
attr->nullmap.usage);
/* index values */
*p_offset += setup_arrow_buffer(node+1, *p_offset,
attr->values.usage);
/* element values */
count += element->setup_buffer(element, node+2, p_offset);
return count;
}
static int
setup_buffer_composite_type(SQLattribute *attr,
ArrowBuffer *node, size_t *p_offset)
{
SQLtable *subtypes = attr->subtypes;
int i, count = 1;
/* nullmap */
if (attr->nullcount == 0)
*p_offset += setup_arrow_buffer(node, *p_offset, 0);
else
*p_offset += setup_arrow_buffer(node, *p_offset,
attr->nullmap.usage);
/* walk down the sub-types */
for (i=0; i < subtypes->nfields; i++)
{
SQLattribute *subattr = &subtypes->attrs[i];
count += subattr->setup_buffer(subattr, node+count, p_offset);
}
return count; /* nullmap + subtypes */
}
/* ----------------------------------------------------------------
*
* write buffer handler for each data types
*
* ----------------------------------------------------------------
*/
static void
write_buffer_inline_type(SQLattribute *attr, int fdesc)
{
/* nullmap */
if (attr->nullcount > 0)
__write_buffer_common(fdesc,
attr->nullmap.ptr,
attr->nullmap.usage);
/* fixed length values */
__write_buffer_common(fdesc,
attr->values.ptr,
attr->values.usage);
}
static void
write_buffer_varlena_type(SQLattribute *attr, int fdesc)
{
/* nullmap */
if (attr->nullcount > 0)
__write_buffer_common(fdesc,
attr->nullmap.ptr,
attr->nullmap.usage);
/* index values */
__write_buffer_common(fdesc,
attr->values.ptr,
attr->values.usage);
/* extra buffer */
__write_buffer_common(fdesc,
attr->extra.ptr,
attr->extra.usage);
}
static void
write_buffer_array_type(SQLattribute *attr, int fdesc)
{
SQLattribute *element = attr->element;
/* nullmap */
if (attr->nullcount > 0)
__write_buffer_common(fdesc,
attr->nullmap.ptr,
attr->nullmap.usage);
/* offset values */
__write_buffer_common(fdesc,
attr->values.ptr,
attr->values.usage);
/* element values */
element->write_buffer(element, fdesc);
}
static void
write_buffer_composite_type(SQLattribute *attr, int fdesc)
{
SQLtable *subtypes = attr->subtypes;
int i;
/* nullmap */
if (attr->nullcount > 0)
__write_buffer_common(fdesc,
attr->nullmap.ptr,
attr->nullmap.usage);
/* sub-types */
for (i=0; i < subtypes->nfields; i++)
{
SQLattribute *subattr = &subtypes->attrs[i];
subattr->write_buffer(subattr, fdesc);
}
}
/* ----------------------------------------------------------------
*
* setup handler for each data types
*
* ----------------------------------------------------------------
*/
static void
assignArrowTypeInt(SQLattribute *attr, int *p_numBuffers, bool is_signed)
{
attr->arrow_type.tag = ArrowNodeTag__Int;
attr->arrow_type.Int.is_signed = is_signed;
switch (attr->attlen)
{
case sizeof(char):
attr->arrow_type.Int.bitWidth = 8;
attr->arrow_typename = (is_signed ? "Int8" : "Uint8");
attr->put_value = put_inline_8b_value;
attr->stat_update = stat_update_int8_value;
break;
case sizeof(short):
attr->arrow_type.Int.bitWidth = 16;
attr->arrow_typename = (is_signed ? "Int16" : "Uint16");
attr->put_value = put_inline_16b_value;
attr->stat_update = stat_update_int16_value;
break;
case sizeof(int):
attr->arrow_type.Int.bitWidth = 32;
attr->arrow_typename = (is_signed ? "Int32" : "Uint32");
attr->put_value = put_inline_32b_value;
attr->stat_update = stat_update_int32_value;
break;
case sizeof(long):
attr->arrow_type.Int.bitWidth = 64;
attr->arrow_typename = (is_signed ? "Int64" : "Uint64");
attr->put_value = put_inline_64b_value;
attr->stat_update = stat_update_int64_value;
break;
default:
Elog("unsupported Int width: %d", attr->attlen);
break;
}
attr->buffer_usage = buffer_usage_inline_type;
attr->setup_buffer = setup_buffer_inline_type;
attr->write_buffer = write_buffer_inline_type;
*p_numBuffers += 2; /* nullmap + values */
}
static void
assignArrowTypeFloatingPoint(SQLattribute *attr, int *p_numBuffers)
{
attr->arrow_type.tag = ArrowNodeTag__FloatingPoint;
switch (attr->attlen)
{
case sizeof(short): /* half */
attr->arrow_type.FloatingPoint.precision = ArrowPrecision__Half;
attr->arrow_typename = "Float16";
attr->put_value = put_inline_16b_value;
break;
case sizeof(float):
attr->arrow_type.FloatingPoint.precision = ArrowPrecision__Single;
attr->arrow_typename = "Float32";
attr->put_value = put_inline_32b_value;
attr->stat_update = stat_update_float4_value;
break;
case sizeof(double):
attr->arrow_type.FloatingPoint.precision = ArrowPrecision__Double;
attr->arrow_typename = "Float64";
attr->put_value = put_inline_64b_value;
attr->stat_update = stat_update_float8_value;
break;
default:
Elog("unsupported floating point width: %d", attr->attlen);
break;
}
attr->buffer_usage = buffer_usage_inline_type;
attr->setup_buffer = setup_buffer_inline_type;
attr->write_buffer = write_buffer_inline_type;
*p_numBuffers += 2; /* nullmap + values */
}
static void
assignArrowTypeBinary(SQLattribute *attr, int *p_numBuffers)
{
attr->arrow_type.tag = ArrowNodeTag__Binary;
attr->arrow_typename = "Binary";
attr->put_value = put_variable_value;
attr->buffer_usage = buffer_usage_varlena_type;
attr->setup_buffer = setup_buffer_varlena_type;
attr->write_buffer = write_buffer_varlena_type;
*p_numBuffers += 3; /* nullmap + index + extra */
}
static void
assignArrowTypeUtf8(SQLattribute *attr, int *p_numBuffers)
{
attr->arrow_type.tag = ArrowNodeTag__Utf8;
attr->arrow_typename = "Utf8";
attr->put_value = put_variable_value;
attr->buffer_usage = buffer_usage_varlena_type;
attr->setup_buffer = setup_buffer_varlena_type;
attr->write_buffer = write_buffer_varlena_type;
*p_numBuffers += 3; /* nullmap + index + extra */
}
static void
assignArrowTypeBpchar(SQLattribute *attr, int *p_numBuffers)
{
attr->arrow_type.tag = ArrowNodeTag__Utf8;
attr->arrow_typename = "Utf8";
attr->put_value = put_bpchar_value;
attr->buffer_usage = buffer_usage_varlena_type;
attr->setup_buffer = setup_buffer_varlena_type;
attr->write_buffer = write_buffer_varlena_type;
*p_numBuffers += 3; /* nullmap + index + extra */
}
static void
assignArrowTypeBool(SQLattribute *attr, int *p_numBuffers)
{
attr->arrow_type.tag = ArrowNodeTag__Bool;
attr->arrow_typename = "Bool";
attr->put_value = put_inline_bool_value;
attr->stat_update = stat_update_int8_value;
attr->buffer_usage = buffer_usage_inline_type;
attr->setup_buffer = setup_buffer_inline_type;
attr->write_buffer = write_buffer_inline_type;
*p_numBuffers += 2; /* nullmap + values */
}
static void
assignArrowTypeDecimal(SQLattribute *attr, int *p_numBuffers)
{
#ifdef PG_INT128_TYPE
int typmod = attr->atttypmod;
int precision = 30; /* default, if typmod == -1 */
int scale = 11; /* default, if typmod == -1 */
if (typmod >= VARHDRSZ)
{
typmod -= VARHDRSZ;
precision = (typmod >> 16) & 0xffff;
scale = (typmod & 0xffff);
}
memset(&attr->arrow_type, 0, sizeof(ArrowType));
attr->arrow_type.tag = ArrowNodeTag__Decimal;
attr->arrow_type.Decimal.precision = precision;
attr->arrow_type.Decimal.scale = scale;
attr->arrow_typename = "Decimal";
attr->put_value = put_decimal_value;
attr->buffer_usage = buffer_usage_inline_type;
attr->setup_buffer = setup_buffer_inline_type;
attr->write_buffer = write_buffer_inline_type;
*p_numBuffers += 2; /* nullmap + values */
#else
/*
* MEMO: Numeric of PostgreSQL is mapped to Decimal128 in Apache Arrow.
* Due to implementation reason, we require int128 support by compiler.
*/
Elog("Numeric type of PostgreSQL is not supported in this build");
#endif
}
static void
assignArrowTypeDate(SQLattribute *attr, int *p_numBuffers)
{
attr->arrow_type.tag = ArrowNodeTag__Date;
attr->arrow_type.Date.unit = ArrowDateUnit__Day;
attr->arrow_typename = "Date";
attr->put_value = put_date_value;
attr->stat_update = stat_update_int32_value;
attr->buffer_usage = buffer_usage_inline_type;
attr->setup_buffer = setup_buffer_inline_type;
attr->write_buffer = write_buffer_inline_type;
*p_numBuffers += 2; /* nullmap + values */
}
static void
assignArrowTypeTime(SQLattribute *attr, int *p_numBuffers)
{
attr->arrow_type.tag = ArrowNodeTag__Time;
attr->arrow_type.Time.unit = ArrowTimeUnit__MicroSecond;
attr->arrow_type.Time.bitWidth = 64;
attr->arrow_typename = "Time";
attr->put_value = put_inline_64b_value;
attr->stat_update = stat_update_int64_value;
attr->buffer_usage = buffer_usage_inline_type;
attr->setup_buffer = setup_buffer_inline_type;
attr->write_buffer = write_buffer_inline_type;
*p_numBuffers += 2; /* nullmap + values */
}
static void
assignArrowTypeTimestamp(SQLattribute *attr, int *p_numBuffers)
{
attr->arrow_type.tag = ArrowNodeTag__Timestamp;
attr->arrow_type.Timestamp.unit = ArrowTimeUnit__MicroSecond;
attr->arrow_typename = "Timestamp";
attr->put_value = put_timestamp_value;
attr->stat_update = stat_update_int64_value;
attr->buffer_usage = buffer_usage_inline_type;
attr->setup_buffer = setup_buffer_inline_type;
attr->write_buffer = write_buffer_inline_type;
*p_numBuffers += 2; /* nullmap + values */
}
#if 0
static void
assignArrowTypeInterval(SQLattribute *attr, int *p_numBuffers)
{
usec + day + mon;
Elog("Interval is not supported yet");
}
#endif
static void
assignArrowTypeList(SQLattribute *attr, int *p_numBuffers)
{
SQLattribute *element = attr->element;
attr->arrow_type.tag = ArrowNodeTag__List;
attr->put_value = put_array_value;
attr->arrow_typename = psprintf("List<%s>", element->arrow_typename);
attr->buffer_usage = buffer_usage_array_type;
attr->setup_buffer = setup_buffer_array_type;
attr->write_buffer = write_buffer_array_type;
*p_numBuffers += 2; /* nullmap + offset vector */
}
static void
assignArrowTypeStruct(SQLattribute *attr, int *p_numBuffers)
{