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Non-decimal integer literals

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Add support for hexadecimal, octal, and binary integer literals:

    0x42F
    0o273
    0b100101

per SQL:202x draft.

This adds support in the lexer as well as in the integer type input
functions.

Reviewed-by: John Naylor <john.naylor@enterprisedb.com>
Reviewed-by: Zhihong Yu <zyu@yugabyte.com>
Reviewed-by: David Rowley <dgrowleyml@gmail.com>
Reviewed-by: Dean Rasheed <dean.a.rasheed@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/b239564c-cad0-b23e-c57e-166d883cb97d@enterprisedb.com
This commit is contained in:
Peter Eisentraut
2022-12-14 05:40:38 +01:00
parent 60684dd834
commit 6fcda9aba8
16 changed files with 1022 additions and 112 deletions
Download Patch File Download Diff File Expand all files Collapse all files

37
src/backend/parser/parse_node.c
View File

@@ -385,11 +385,46 @@ make_const(ParseState *pstate, A_Const *aconst)
{
/* could be an oversize integer as well as a float ... */
int base = 10;
char *startptr;
int sign;
char *testvalue;
int64 val64;
char *endptr;
startptr = aconst->val.fval.fval;
if (startptr[0] == '-')
{
sign = -1;
startptr++;
}
else
sign = +1;
if (startptr[0] == '0')
{
if (startptr[1] == 'b' || startptr[1] == 'B')
{
base = 2;
startptr += 2;
}
else if (startptr[1] == 'o' || startptr[1] == 'O')
{
base = 8;
startptr += 2;
}
if (startptr[1] == 'x' || startptr[1] == 'X')
{
base = 16;
startptr += 2;
}
}
if (sign == +1)
testvalue = startptr;
else
testvalue = psprintf("-%s", startptr);
errno = 0;
val64 = strtoi64(aconst->val.fval.fval, &endptr, 10);
val64 = strtoi64(testvalue, &endptr, base);
if (errno == 0 && *endptr == '\0')
{
/*