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|
%option prefix="flb_sp_"
%option caseless
%option 8bit reentrant bison-bridge
%option warn noyywrap nodefault
%option nounput
%option noinput
%{
#include <stdio.h>
#include <stdbool.h>
#include <ctype.h>
#include <fluent-bit/flb_str.h>
#include <fluent-bit/flb_log.h>
#include "sql_parser.h"
#include <fluent-bit/stream_processor/flb_sp_parser.h>
static inline char *remove_dup_qoutes(const char *s, size_t n)
{
char *str;
int dups;
int i, j;
dups = 0;
for (i = 0; i < n; i++) {
if (s[i] == '\'') {
dups++;
i++;
}
}
str = (char *) flb_malloc(n - dups + 1);
if (!str) {
return NULL;
}
j = 0;
for (i = 0; i < n; i++, j++) {
if (s[i] == '\'') {
str[j] = '\'';
i++;
} else {
str[j] = s[i];
}
}
str[j] = '\0';
return str;
}
char* to_upper(char* token, size_t len)
{
int i;
char* token_;
token_ = flb_malloc(len * sizeof(char) + 1);
for (i = 0; i < len; i++) {
token_[i] = toupper(token[i]);
}
token_[len] = '\0';
return token_;
}
int func_to_code(char* name, size_t len)
{
int code;
char* name_;
name_ = to_upper(name, len);
code = -1;
if (!strcmp(name_, "AVG")) {
code = FLB_SP_AVG;
} else if (!strcmp(name_, "SUM")) {
code = FLB_SP_SUM;
} else if (!strcmp(name_, "COUNT")) {
code = FLB_SP_COUNT;
} else if (!strcmp(name_, "MIN")) {
code = FLB_SP_MIN;
} else if (!strcmp(name_, "MAX")) {
code = FLB_SP_MAX;
} else if (!strcmp(name_, "TIMESERIES_FORECAST")) {
code = FLB_SP_FORECAST;
} else if (!strcmp(name_, "NOW")) {
code = FLB_SP_NOW;
} else if (!strcmp(name_, "UNIX_TIMESTAMP")) {
code = FLB_SP_UNIX_TIMESTAMP;
} else if (!strcmp(name_, "RECORD_TAG")) {
code = FLB_SP_RECORD_TAG;
} else if (!strcmp(name_, "RECORD_TIME")) {
code = FLB_SP_RECORD_TIME;
}
flb_free(name_);
return code;
}
%}
%%
/* SQL */
CREATE return CREATE;
FLUSH return FLUSH;
STREAM return STREAM;
SNAPSHOT return SNAPSHOT;
WITH return WITH;
SELECT return SELECT;
AS return AS;
FROM return FROM;
STREAM: return FROM_STREAM;
TAG: return FROM_TAG;
WHERE return WHERE;
AND return AND;
OR return OR;
NOT return NOT;
WINDOW return WINDOW;
"GROUP BY" return GROUP_BY;
LIMIT return LIMIT;
IS return IS;
NULL return NUL;
/* Aggregation Functions */
SUM {yylval->integer = func_to_code(yytext, yyleng); return SUM;}
AVG {yylval->integer = func_to_code(yytext, yyleng); return AVG;}
COUNT {yylval->integer = func_to_code(yytext, yyleng); return COUNT;}
MIN {yylval->integer = func_to_code(yytext, yyleng); return MIN;}
MAX {yylval->integer = func_to_code(yytext, yyleng); return MAX;}
TIMESERIES_FORECAST {yylval->integer = func_to_code(yytext, yyleng); return TIMESERIES_FORECAST;};
/* Record Functions */
@RECORD return RECORD;
CONTAINS return CONTAINS;
TIME return TIME;
/* Window Types */
TUMBLING return TUMBLING;
HOPPING return HOPPING;
"ADVANCE BY" return ADVANCE_BY;
/* Time */
HOUR return HOUR;
MINUTE return MINUTE;
SECOND return SECOND;
/* Date / Time Functions */
NOW {yylval->integer = func_to_code(yytext, yyleng); return NOW;}
UNIX_TIMESTAMP {yylval->integer = func_to_code(yytext, yyleng); return UNIX_TIMESTAMP;}
/* Record information */
RECORD_TAG {yylval->integer = func_to_code(yytext, yyleng); return RECORD_TAG;}
RECORD_TIME {yylval->integer = func_to_code(yytext, yyleng); return RECORD_TIME;}
"true" { yylval->boolean = true; return BOOLTYPE; };
"false" { yylval->boolean = false; return BOOLTYPE; };
-?[1-9][0-9]*|0 { yylval->integer = atoi(yytext); return INTEGER; }
(-?[1-9][0-9]*|0)\.[0-9]+ { yylval->fval = atof(yytext); return FLOATING; }
\'([^']|'{2})*\' { yylval->string = remove_dup_qoutes(yytext + 1, yyleng - 2); return STRING; }
[_A-Za-z][A-Za-z0-9_.]* { yylval->string = flb_strdup(yytext); return IDENTIFIER; }
"*" |
"," |
"=" |
"(" |
")" |
"[" |
"]" |
"." |
";" { return yytext[0]; }
"!=" return NEQ;
"<>" return NEQ;
"<" return LT;
"<=" return LTE;
">" return GT;
">=" return GTE;
\' return QUOTE;
\n
[ \t]+ /* ignore whitespace */;
. flb_error("[sp] bad input character '%s' at line %d", yytext, yylineno);
%%
|
