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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

74
src/fe_utils/psqlscan.l
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@@ -323,25 +323,40 @@ operator {op_chars}+
* Unary minus is not part of a number here. Instead we pass it separately to
* the parser, and there it gets coerced via doNegate().
*
* {decimalfail} is used because we would like "1..10" to lex as 1, dot_dot, 10.
* {numericfail} is used because we would like "1..10" to lex as 1, dot_dot, 10.
*
* {realfail} is added to prevent the need for scanner
* backup when the {real} rule fails to match completely.
*/
digit [0-9]
decdigit [0-9]
hexdigit [0-9A-Fa-f]
octdigit [0-7]
bindigit [0-1]
integer {digit}+
decimal (({digit}*\.{digit}+)|({digit}+\.{digit}*))
decimalfail {digit}+\.\.
real ({integer}|{decimal})[Ee][-+]?{digit}+
realfail ({integer}|{decimal})[Ee][-+]
decinteger {decdigit}+
hexinteger 0[xX]{hexdigit}+
octinteger 0[oO]{octdigit}+
bininteger 0[bB]{bindigit}+
integer_junk {integer}{ident_start}
decimal_junk {decimal}{ident_start}
hexfail 0[xX]
octfail 0[oO]
binfail 0[bB]
numeric (({decinteger}\.{decinteger}?)|(\.{decinteger}))
numericfail {decdigit}+\.\.
real ({decinteger}|{numeric})[Ee][-+]?{decdigit}+
realfail ({decinteger}|{numeric})[Ee][-+]
decinteger_junk {decinteger}{ident_start}
hexinteger_junk {hexinteger}{ident_start}
octinteger_junk {octinteger}{ident_start}
bininteger_junk {bininteger}{ident_start}
numeric_junk {numeric}{ident_start}
real_junk {real}{ident_start}
param \${integer}
param_junk \${integer}{ident_start}
param \${decinteger}
param_junk \${decinteger}{ident_start}
/* psql-specific: characters allowed in variable names */
variable_char [A-Za-z\200-\377_0-9]
@@ -847,13 +862,31 @@ other .
ECHO;
}
{integer} {
{decinteger} {
ECHO;
}
{decimal} {
{hexinteger} {
ECHO;
}
{decimalfail} {
{octinteger} {
ECHO;
}
{bininteger} {
ECHO;
}
{hexfail} {
ECHO;
}
{octfail} {
ECHO;
}
{binfail} {
ECHO;
}
{numeric} {
ECHO;
}
{numericfail} {
/* throw back the .., and treat as integer */
yyless(yyleng - 2);
ECHO;
@@ -864,10 +897,19 @@ other .
{realfail} {
ECHO;
}
{integer_junk} {
{decinteger_junk} {
ECHO;
}
{decimal_junk} {
{hexinteger_junk} {
ECHO;
}
{octinteger_junk} {
ECHO;
}
{bininteger_junk} {
ECHO;
}
{numeric_junk} {
ECHO;
}
{real_junk} {