greenplumn typename 源码
greenplumn typename 代码
文件路径：/src/interfaces/ecpg/ecpglib/typename.c
/* src/interfaces/ecpg/ecpglib/typename.c */
#define POSTGRES_ECPG_INTERNAL
#include "postgres_fe.h"
#include "catalog/pg_type_d.h"
#include "ecpgtype.h"
#include "ecpglib.h"
#include "ecpglib_extern.h"
#include "sqltypes.h"
#include "sql3types.h"
/*
* This function is used to generate the correct type names.
*/
const char *
ecpg_type_name(enum ECPGttype typ)
{
switch (typ)
{
case ECPGt_char:
case ECPGt_string:
return "char";
case ECPGt_unsigned_char:
return "unsigned char";
case ECPGt_short:
return "short";
case ECPGt_unsigned_short:
return "unsigned short";
case ECPGt_int:
return "int";
case ECPGt_unsigned_int:
return "unsigned int";
case ECPGt_long:
return "long";
case ECPGt_unsigned_long:
return "unsigned long";
case ECPGt_long_long:
return "long long";
case ECPGt_unsigned_long_long:
return "unsigned long long";
case ECPGt_float:
return "float";
case ECPGt_double:
return "double";
case ECPGt_bool:
return "bool";
case ECPGt_varchar:
return "varchar";
case ECPGt_bytea:
return "bytea";
case ECPGt_char_variable:
return "char";
case ECPGt_decimal:
return "decimal";
case ECPGt_numeric:
return "numeric";
case ECPGt_date:
return "date";
case ECPGt_timestamp:
return "timestamp";
case ECPGt_interval:
return "interval";
case ECPGt_const:
return "Const";
default:
abort();
}
return ""; /* keep MSC compiler happy */
}
int
ecpg_dynamic_type(Oid type)
{
switch (type)
{
case BOOLOID:
return SQL3_BOOLEAN; /* bool */
case INT2OID:
return SQL3_SMALLINT; /* int2 */
case INT4OID:
return SQL3_INTEGER; /* int4 */
case TEXTOID:
return SQL3_CHARACTER; /* text */
case FLOAT4OID:
return SQL3_REAL; /* float4 */
case FLOAT8OID:
return SQL3_DOUBLE_PRECISION; /* float8 */
case BPCHAROID:
return SQL3_CHARACTER; /* bpchar */
case VARCHAROID:
return SQL3_CHARACTER_VARYING; /* varchar */
case DATEOID:
return SQL3_DATE_TIME_TIMESTAMP; /* date */
case TIMEOID:
return SQL3_DATE_TIME_TIMESTAMP; /* time */
case TIMESTAMPOID:
return SQL3_DATE_TIME_TIMESTAMP; /* datetime */
case NUMERICOID:
return SQL3_NUMERIC; /* numeric */
default:
return 0;
}
}
int
sqlda_dynamic_type(Oid type, enum COMPAT_MODE compat)
{
switch (type)
{
case CHAROID:
case VARCHAROID:
case BPCHAROID:
case TEXTOID:
return ECPGt_char;
case INT2OID:
return ECPGt_short;
case INT4OID:
return ECPGt_int;
case FLOAT8OID:
return ECPGt_double;
case FLOAT4OID:
return ECPGt_float;
case NUMERICOID:
return INFORMIX_MODE(compat) ? ECPGt_decimal : ECPGt_numeric;
case DATEOID:
return ECPGt_date;
case TIMESTAMPOID:
case TIMESTAMPTZOID:
return ECPGt_timestamp;
case INTERVALOID:
return ECPGt_interval;
case INT8OID:
#ifdef HAVE_LONG_LONG_INT_64
return ECPGt_long_long;
#endif
#ifdef HAVE_LONG_INT_64
return ECPGt_long;
#endif
/* Unhandled types always return a string */
default:
return ECPGt_char;
}
}
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