/* A lexical scanner generated by flex */

/* Scanner skeleton version:
 * $Header: /home/daffy/u0/vern/flex/RCS/flex.skl,v 2.91 96/09/10 16:58:48 vern Exp $
 * $FreeBSD: src/usr.bin/lex/flex.skl,v 1.4 1999/10/27 07:56:44 obrien Exp $
 */

#define FLEX_SCANNER
#define YY_FLEX_MAJOR_VERSION 2
#define YY_FLEX_MINOR_VERSION 5

#include <stdio.h>


/* cfront 1.2 defines "c_plusplus" instead of "__cplusplus" */
#ifdef c_plusplus
#ifndef __cplusplus
#define __cplusplus
#endif
#endif


#ifdef __cplusplus

#include <stdlib.h>
#include <unistd.h>

/* Use prototypes in function declarations. */
#define YY_USE_PROTOS

/* The "const" storage-class-modifier is valid. */
#define YY_USE_CONST

#else	/* ! __cplusplus */

#if __STDC__

#define YY_USE_PROTOS
#define YY_USE_CONST

#endif	/* __STDC__ */
#endif	/* ! __cplusplus */

#ifdef __TURBOC__
 #pragma warn -rch
 #pragma warn -use
#include <io.h>
#include <stdlib.h>
#define YY_USE_CONST
#define YY_USE_PROTOS
#endif

#ifdef YY_USE_CONST
#define yyconst const
#else
#define yyconst
#endif


#ifdef YY_USE_PROTOS
#define YY_PROTO(proto) proto
#else
#define YY_PROTO(proto) ()
#endif

/* Returned upon end-of-file. */
#define YY_NULL 0

/* Promotes a possibly negative, possibly signed char to an unsigned
 * integer for use as an array index.  If the signed char is negative,
 * we want to instead treat it as an 8-bit unsigned char, hence the
 * double cast.
 */
#define YY_SC_TO_UI(c) ((unsigned int) (unsigned char) c)

/* Enter a start condition.  This macro really ought to take a parameter,
 * but we do it the disgusting crufty way forced on us by the ()-less
 * definition of BEGIN.
 */
#define BEGIN yy_start = 1 + 2 *

/* Translate the current start state into a value that can be later handed
 * to BEGIN to return to the state.  The YYSTATE alias is for lex
 * compatibility.
 */
#define YY_START ((yy_start - 1) / 2)
#define YYSTATE YY_START

/* Action number for EOF rule of a given start state. */
#define YY_STATE_EOF(state) (YY_END_OF_BUFFER + state + 1)

/* Special action meaning "start processing a new file". */
#define YY_NEW_FILE yyrestart( yyin )

#define YY_END_OF_BUFFER_CHAR 0

/* Size of default input buffer. */
#define YY_BUF_SIZE 16384

typedef struct yy_buffer_state *YY_BUFFER_STATE;

extern int yyleng;
extern FILE *yyin, *yyout;

#define EOB_ACT_CONTINUE_SCAN 0
#define EOB_ACT_END_OF_FILE 1
#define EOB_ACT_LAST_MATCH 2

/* The funky do-while in the following #define is used to turn the definition
 * int a single C statement (which needs a semi-colon terminator).  This
 * avoids problems with code like:
 *
 * 	if ( condition_holds )
 *		yyless( 5 );
 *	else
 *		do_something_else();
 *
 * Prior to using the do-while the compiler would get upset at the
 * "else" because it interpreted the "if" statement as being all
 * done when it reached the ';' after the yyless() call.
 */

/* Return all but the first 'n' matched characters back to the input stream. */

#define yyless(n) \
	do \
		{ \
		/* Undo effects of setting up yytext. */ \
		*yy_cp = yy_hold_char; \
		YY_RESTORE_YY_MORE_OFFSET \
		yy_c_buf_p = yy_cp = yy_bp + n - YY_MORE_ADJ; \
		YY_DO_BEFORE_ACTION; /* set up yytext again */ \
		} \
	while ( 0 )

#define unput(c) yyunput( c, yytext_ptr )

/* The following is because we cannot portably get our hands on size_t
 * (without autoconf's help, which isn't available because we want
 * flex-generated scanners to compile on their own).
 */
typedef unsigned int yy_size_t;


struct yy_buffer_state
	{
	FILE *yy_input_file;

	char *yy_ch_buf;		/* input buffer */
	char *yy_buf_pos;		/* current position in input buffer */

	/* Size of input buffer in bytes, not including room for EOB
	 * characters.
	 */
	yy_size_t yy_buf_size;

	/* Number of characters read into yy_ch_buf, not including EOB
	 * characters.
	 */
	int yy_n_chars;

	/* Whether we "own" the buffer - i.e., we know we created it,
	 * and can realloc() it to grow it, and should free() it to
	 * delete it.
	 */
	int yy_is_our_buffer;

	/* Whether this is an "interactive" input source; if so, and
	 * if we're using stdio for input, then we want to use getc()
	 * instead of fread(), to make sure we stop fetching input after
	 * each newline.
	 */
	int yy_is_interactive;

	/* Whether we're considered to be at the beginning of a line.
	 * If so, '^' rules will be active on the next match, otherwise
	 * not.
	 */
	int yy_at_bol;

	/* Whether to try to fill the input buffer when we reach the
	 * end of it.
	 */
	int yy_fill_buffer;

	int yy_buffer_status;
#define YY_BUFFER_NEW 0
#define YY_BUFFER_NORMAL 1
	/* When an EOF's been seen but there's still some text to process
	 * then we mark the buffer as YY_EOF_PENDING, to indicate that we
	 * shouldn't try reading from the input source any more.  We might
	 * still have a bunch of tokens to match, though, because of
	 * possible backing-up.
	 *
	 * When we actually see the EOF, we change the status to "new"
	 * (via yyrestart()), so that the user can continue scanning by
	 * just pointing yyin at a new input file.
	 */
#define YY_BUFFER_EOF_PENDING 2
	};

static YY_BUFFER_STATE yy_current_buffer = 0;

/* We provide macros for accessing buffer states in case in the
 * future we want to put the buffer states in a more general
 * "scanner state".
 */
#define YY_CURRENT_BUFFER yy_current_buffer


/* yy_hold_char holds the character lost when yytext is formed. */
static char yy_hold_char;

static int yy_n_chars;		/* number of characters read into yy_ch_buf */


int yyleng;

/* Points to current character in buffer. */
static char *yy_c_buf_p = (char *) 0;
static int yy_init = 1;		/* whether we need to initialize */
static int yy_start = 0;	/* start state number */

/* Flag which is used to allow yywrap()'s to do buffer switches
 * instead of setting up a fresh yyin.  A bit of a hack ...
 */
static int yy_did_buffer_switch_on_eof;

void yyrestart YY_PROTO(( FILE *input_file ));

void yy_switch_to_buffer YY_PROTO(( YY_BUFFER_STATE new_buffer ));
void yy_load_buffer_state YY_PROTO(( void ));
YY_BUFFER_STATE yy_create_buffer YY_PROTO(( FILE *file, int size ));
void yy_delete_buffer YY_PROTO(( YY_BUFFER_STATE b ));
void yy_init_buffer YY_PROTO(( YY_BUFFER_STATE b, FILE *file ));
void yy_flush_buffer YY_PROTO(( YY_BUFFER_STATE b ));
#define YY_FLUSH_BUFFER yy_flush_buffer( yy_current_buffer )

YY_BUFFER_STATE yy_scan_buffer YY_PROTO(( char *base, yy_size_t size ));
YY_BUFFER_STATE yy_scan_string YY_PROTO(( yyconst char *yy_str ));
YY_BUFFER_STATE yy_scan_bytes YY_PROTO(( yyconst char *bytes, int len ));

static void *yy_flex_alloc YY_PROTO(( yy_size_t ));
static void *yy_flex_realloc YY_PROTO(( void *, yy_size_t ));
static void yy_flex_free YY_PROTO(( void * ));

#define yy_new_buffer yy_create_buffer

#define yy_set_interactive(is_interactive) \
	{ \
	if ( ! yy_current_buffer ) \
		yy_current_buffer = yy_create_buffer( yyin, YY_BUF_SIZE ); \
	yy_current_buffer->yy_is_interactive = is_interactive; \
	}

#define yy_set_bol(at_bol) \
	{ \
	if ( ! yy_current_buffer ) \
		yy_current_buffer = yy_create_buffer( yyin, YY_BUF_SIZE ); \
	yy_current_buffer->yy_at_bol = at_bol; \
	}

#define YY_AT_BOL() (yy_current_buffer->yy_at_bol)

typedef unsigned char YY_CHAR;
FILE *yyin = (FILE *) 0, *yyout = (FILE *) 0;
typedef int yy_state_type;
extern char *yytext;
#define yytext_ptr yytext

static yy_state_type yy_get_previous_state YY_PROTO(( void ));
static yy_state_type yy_try_NUL_trans YY_PROTO(( yy_state_type current_state ));
static int yy_get_next_buffer YY_PROTO(( void ));
static void yy_fatal_error YY_PROTO(( yyconst char msg[] ));

/* Done after the current pattern has been matched and before the
 * corresponding action - sets up yytext.
 */
#define YY_DO_BEFORE_ACTION \
	yytext_ptr = yy_bp; \
	yyleng = (int) (yy_cp - yy_bp); \
	yy_hold_char = *yy_cp; \
	*yy_cp = '\0'; \
	yy_c_buf_p = yy_cp;

#define YY_NUM_RULES 31
#define YY_END_OF_BUFFER 32
static yyconst short int yy_accept[122] =
    {   0,
        0,    0,    0,    0,    0,    0,    0,    0,    0,    0,
        0,    0,   32,   30,    1,    1,   24,   19,   23,   23,
       13,   23,   23,   23,   23,   26,   23,   29,   29,   29,
        8,    6,    4,   31,   21,   20,    7,   12,   16,   14,
       31,   24,   25,    1,   27,    2,   27,   26,    0,   22,
       29,    5,   11,    8,    0,    0,    0,    4,    4,    4,
        3,   21,    7,    0,    0,    0,   16,    0,    0,   15,
        0,   17,    1,    1,    2,   27,    0,   28,    0,   10,
        0,    0,    0,    9,    0,    0,    0,   18,    0,    0,
        0,    0,    0,    0,    0,    0,    0,    0,    0,    0,

        0,    0,    0,    0,   10,    0,    0,    0,    0,    9,
        0,    0,    0,    0,   18,    0,    0,    0,    0,    0,
        0
    } ;

static yyconst int yy_ec[256] =
    {   0,
        1,    1,    1,    1,    1,    1,    1,    1,    2,    3,
        1,    2,    4,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    2,    5,    6,    5,    7,    8,    5,    9,   10,
       10,   11,   12,   10,   13,   14,   15,   16,   16,   16,
       16,   16,   16,   16,   16,   16,   16,   17,   10,    8,
        8,    8,    5,    5,   18,   19,   18,   18,   20,   18,
       18,   18,   18,   18,   18,   18,   18,   18,   18,   18,
       18,   18,   18,   18,   18,   18,   18,   21,   18,   18,
       10,   22,   10,    8,   18,    5,   18,   19,   18,   18,

       20,   18,   18,   18,   18,   18,   18,   18,   18,   18,
       18,   18,   18,   18,   18,   18,   18,   18,   18,   21,
       18,   18,    1,    8,    1,    5,    1,   18,   18,   18,
       18,   18,   18,   18,   18,   18,   18,   18,   18,   18,
       18,   18,   18,   18,   18,   18,   18,   18,   18,   18,
       18,   18,   18,   18,   18,   18,   18,   18,   18,   18,
       18,   18,   18,   18,   18,   18,   18,   18,   18,   18,
       18,   18,   18,   18,   18,   18,   18,   18,   18,   18,
       18,   18,   18,   18,   18,   18,   18,   18,   18,   18,
       18,   18,   18,   18,   18,   18,   18,   18,   18,   18,

       18,   18,   18,   18,   18,   18,   18,   18,   18,   18,
       18,   18,   18,   18,   18,   18,   18,   18,   18,   18,
       18,   18,   18,   18,   18,   18,   18,   18,   18,   18,
       18,   18,   18,   18,   18,   18,   18,   18,   18,   18,
       18,   18,   18,   18,   18,   18,   18,   18,   18,   18,
       18,   18,   18,   18,   18
    } ;

static yyconst int yy_meta[23] =
    {   0,
        1,    2,    3,    3,    4,    5,    4,    4,    6,    1,
        7,    4,    8,    1,    4,    9,    4,    9,    9,    9,
        9,   10
    } ;

static yyconst short int yy_base[147] =
    {   0,
        0,    0,  121,  120,  117,  116,  116,  115,  111,  110,
       14,   15,  118,  572,  572,  572,    0,  572,  101,    0,
      572,  572,  103,   99,   99,   11,   92,    0,   99,   98,
        0,   36,    0,   15,    0,  572,    0,   48,    0,   60,
        0,    0,   90,   69,   12,    0,   13,   27,   32,    0,
        0,  572,  572,    0,    0,   33,   92,    0,  572,   42,
      572,    0,    0,    0,   45,   91,    0,   94,   46,  572,
       85,  572,    0,   82,    0,   40,   80,   76,   57,  572,
       78,   98,   58,  572,   75,  110,   59,  572,   72,  122,
      134,  146,  158,  170,  182,  194,  206,  218,  230,  242,

      254,  266,  278,    0,    0,   70,  290,  302,    0,    0,
       66,  314,  326,    0,    0,   65,  338,   62,   52,   22,
      572,  351,  361,  371,  381,  391,  398,   25,  406,  416,
      426,  436,  446,  456,  465,  475,  482,  489,  496,  503,
      511,  521,  531,  541,  551,  561
    } ;

static yyconst short int yy_def[147] =
    {   0,
      121,    1,  122,  122,  123,  123,  124,  124,  125,  125,
      126,  126,  121,  121,  121,  121,  127,  121,  127,  127,
      121,  121,  127,  121,  127,  121,  127,  128,  128,  128,
      129,  121,  130,  131,  132,  121,  133,  121,  134,  121,
      135,  127,  121,  136,  121,  137,  121,  121,  121,  127,
      128,  121,  121,  129,   32,  138,  121,  130,  121,  131,
      121,  132,  133,   38,  139,  121,  134,   40,  140,  121,
      121,  121,  136,  136,  137,  121,  121,  121,  138,  121,
      121,  141,  139,  121,  121,  142,  140,  121,  121,  143,
      144,  141,  141,  141,  145,  142,  142,  142,  146,  143,

      143,  143,  144,  103,  103,  103,  141,  145,  108,  108,
      108,  142,  146,  113,  113,  113,  143,  103,  108,  113,
        0,  121,  121,  121,  121,  121,  121,  121,  121,  121,
      121,  121,  121,  121,  121,  121,  121,  121,  121,  121,
      121,  121,  121,  121,  121,  121
    } ;

static yyconst short int yy_nxt[595] =
    {   0,
       14,   15,   16,   15,   17,   18,   19,   20,   21,   22,
       20,   20,   23,   24,   25,   26,   27,   28,   29,   28,
       30,   14,   40,   40,   47,   60,   48,   45,   76,   61,
       49,   49,   49,   51,  120,   41,   41,   55,   56,   56,
       47,   80,   48,   77,   77,   81,   49,   78,   57,   64,
       65,   65,   60,   84,   88,   76,   61,   85,   89,   49,
       66,   68,   69,   69,  119,   80,   84,   88,   70,   81,
       85,   89,   71,   74,  118,   74,   74,  120,  119,   74,
       74,   74,  118,   74,   99,   74,   74,   95,   74,   74,
       91,   78,   74,   74,   74,   78,   74,   90,   74,   93,

       56,   56,  121,   86,   82,   43,   53,   52,   50,   46,
       94,   97,   65,   65,   45,   44,   43,  121,   38,   38,
       36,   36,   98,  101,   69,   69,   34,   34,   32,   32,
      121,  121,  121,  121,  102,  104,   79,   79,  121,  121,
      121,  121,  105,  121,  121,  121,  106,   93,   56,   56,
      121,  121,  121,  121,  121,  121,  121,  121,   94,   93,
       56,   56,  121,  121,  121,  121,  121,  121,  121,  121,
       94,   93,   56,   56,  121,  121,  121,  121,  121,  121,
      121,  121,  107,  109,   83,   83,  121,  121,  121,  121,
      110,  121,  121,  121,  111,   97,   65,   65,  121,  121,

      121,  121,  121,  121,  121,  121,   98,   97,   65,   65,
      121,  121,  121,  121,  121,  121,  121,  121,   98,   97,
       65,   65,  121,  121,  121,  121,  121,  121,  121,  121,
      112,  114,   87,   87,  121,  121,  121,  121,  115,  121,
      121,  121,  116,  101,   69,   69,  121,  121,  121,  121,
      121,  121,  121,  121,  102,  101,   69,   69,  121,  121,
      121,  121,  121,  121,  121,  121,  102,  101,   69,   69,
      121,  121,  121,  121,  121,  121,  121,  121,  117,  104,
       79,   79,  121,  121,  121,  121,  105,  121,  121,  121,
      106,   93,   56,   56,  121,  121,  121,  121,  121,  121,

      121,  121,  107,  109,   83,   83,  121,  121,  121,  121,
      110,  121,  121,  121,  111,   97,   65,   65,  121,  121,
      121,  121,  121,  121,  121,  121,  112,  114,   87,   87,
      121,  121,  121,  121,  115,  121,  121,  121,  116,  101,
       69,   69,  121,  121,  121,  121,  121,  121,  121,  121,
      117,   31,   31,   31,   31,   31,   31,   31,   31,   31,
       31,   33,   33,   33,   33,   33,   33,   33,   33,   33,
       33,   35,   35,   35,   35,   35,   35,   35,   35,   35,
       35,   37,   37,   37,   37,   37,   37,   37,   37,   37,
       37,   39,   39,   39,   39,   39,   39,   39,   39,   39,

       39,   42,  121,  121,   42,   42,   54,   54,   54,   54,
       54,  121,   54,   54,   54,   54,   58,   58,   58,   58,
       58,   58,  121,   58,   58,   58,   59,   59,   59,   59,
       59,   59,   59,   59,   59,   59,   62,   62,   62,   62,
      121,   62,   62,   62,   62,   62,   63,   63,   63,   63,
       63,  121,   63,   63,   63,   63,   67,   67,   67,   67,
       67,  121,   67,   67,   67,   72,   72,   72,   72,   72,
       72,   72,   72,   72,   72,   73,   73,  121,   73,   73,
       73,   73,   73,   73,   73,   75,  121,  121,   75,   75,
       79,   79,  121,  121,   79,  121,   79,   83,   83,  121,

      121,   83,  121,   83,   87,   87,  121,  121,   87,  121,
       87,   92,   92,   92,   92,   92,   92,   92,   92,   92,
       92,   96,   96,   96,   96,   96,   96,   96,   96,   96,
       96,  100,  100,  100,  100,  100,  100,  100,  100,  100,
      100,  103,  103,  103,  103,  103,  103,  103,  103,  103,
      103,  108,  108,  108,  108,  108,  108,  108,  108,  108,
      108,  113,  113,  113,  113,  113,  113,  113,  113,  113,
      113,   13,  121,  121,  121,  121,  121,  121,  121,  121,
      121,  121,  121,  121,  121,  121,  121,  121,  121,  121,
      121,  121,  121,  121

    } ;

static yyconst short int yy_chk[595] =
    {   0,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,   11,   12,   26,   34,   26,   45,   47,   34,
       26,   45,   47,  128,  120,   11,   12,   32,   32,   32,
       48,   56,   48,   49,   49,   56,   48,   49,   32,   38,
       38,   38,   60,   65,   69,   76,   60,   65,   69,   76,
       38,   40,   40,   40,  119,   79,   83,   87,   40,   79,
       83,   87,   40,   44,  118,   44,   44,  116,  111,   44,
       44,   44,  106,   44,   89,   44,   74,   85,   74,   74,
       81,   78,   74,   74,   74,   77,   74,   71,   74,   82,

       82,   82,   68,   66,   57,   43,   30,   29,   27,   25,
       82,   86,   86,   86,   24,   23,   19,   13,   10,    9,
        8,    7,   86,   90,   90,   90,    6,    5,    4,    3,
        0,    0,    0,    0,   90,   91,   91,   91,    0,    0,
        0,    0,   91,    0,    0,    0,   91,   92,   92,   92,
        0,    0,    0,    0,    0,    0,    0,    0,   92,   93,
       93,   93,    0,    0,    0,    0,    0,    0,    0,    0,
       93,   94,   94,   94,    0,    0,    0,    0,    0,    0,
        0,    0,   94,   95,   95,   95,    0,    0,    0,    0,
       95,    0,    0,    0,   95,   96,   96,   96,    0,    0,

        0,    0,    0,    0,    0,    0,   96,   97,   97,   97,
        0,    0,    0,    0,    0,    0,    0,    0,   97,   98,
       98,   98,    0,    0,    0,    0,    0,    0,    0,    0,
       98,   99,   99,   99,    0,    0,    0,    0,   99,    0,
        0,    0,   99,  100,  100,  100,    0,    0,    0,    0,
        0,    0,    0,    0,  100,  101,  101,  101,    0,    0,
        0,    0,    0,    0,    0,    0,  101,  102,  102,  102,
        0,    0,    0,    0,    0,    0,    0,    0,  102,  103,
      103,  103,    0,    0,    0,    0,  103,    0,    0,    0,
      103,  107,  107,  107,    0,    0,    0,    0,    0,    0,

        0,    0,  107,  108,  108,  108,    0,    0,    0,    0,
      108,    0,    0,    0,  108,  112,  112,  112,    0,    0,
        0,    0,    0,    0,    0,    0,  112,  113,  113,  113,
        0,    0,    0,    0,  113,    0,    0,    0,  113,  117,
      117,  117,    0,    0,    0,    0,    0,    0,    0,    0,
      117,  122,  122,  122,  122,  122,  122,  122,  122,  122,
      122,  123,  123,  123,  123,  123,  123,  123,  123,  123,
      123,  124,  124,  124,  124,  124,  124,  124,  124,  124,
      124,  125,  125,  125,  125,  125,  125,  125,  125,  125,
      125,  126,  126,  126,  126,  126,  126,  126,  126,  126,

      126,  127,    0,    0,  127,  127,  129,  129,  129,  129,
      129,    0,  129,  129,  129,  129,  130,  130,  130,  130,
      130,  130,    0,  130,  130,  130,  131,  131,  131,  131,
      131,  131,  131,  131,  131,  131,  132,  132,  132,  132,
        0,  132,  132,  132,  132,  132,  133,  133,  133,  133,
      133,    0,  133,  133,  133,  133,  134,  134,  134,  134,
      134,    0,  134,  134,  134,  135,  135,  135,  135,  135,
      135,  135,  135,  135,  135,  136,  136,    0,  136,  136,
      136,  136,  136,  136,  136,  137,    0,    0,  137,  137,
      138,  138,    0,    0,  138,    0,  138,  139,  139,    0,

        0,  139,    0,  139,  140,  140,    0,    0,  140,    0,
      140,  141,  141,  141,  141,  141,  141,  141,  141,  141,
      141,  142,  142,  142,  142,  142,  142,  142,  142,  142,
      142,  143,  143,  143,  143,  143,  143,  143,  143,  143,
      143,  144,  144,  144,  144,  144,  144,  144,  144,  144,
      144,  145,  145,  145,  145,  145,  145,  145,  145,  145,
      145,  146,  146,  146,  146,  146,  146,  146,  146,  146,
      146,  121,  121,  121,  121,  121,  121,  121,  121,  121,
      121,  121,  121,  121,  121,  121,  121,  121,  121,  121,
      121,  121,  121,  121

    } ;

static yy_state_type yy_last_accepting_state;
static char *yy_last_accepting_cpos;

/* The intent behind this definition is that it'll catch
 * any uses of REJECT which flex missed.
 */
#define REJECT reject_used_but_not_detected
#define yymore() yymore_used_but_not_detected
#define YY_MORE_ADJ 0
#define YY_RESTORE_YY_MORE_OFFSET
char *yytext;
#line 1 "scan.l"
#define INITIAL 0
#line 2 "scan.l"
/*-------------------------------------------------------------------------
 *
 * scan.l
 *	  lexical scanner for POSTGRES
 *
 * Portions Copyright (c) 1996-2000, PostgreSQL, Inc
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 *
 * IDENTIFICATION
 *	  $Header: /home/projects/pgsql/cvsroot/pgsql/src/backend/parser/scan.l,v 1.68.2.1 2000/06/01 22:23:10 tgl Exp $
 *
 *-------------------------------------------------------------------------
 */
#include <ctype.h>
#include <unistd.h>
#ifndef __linux__
#include <math.h>
#endif
#include <errno.h>

#include "postgres.h"

#include "miscadmin.h"
#include "nodes/parsenodes.h"
#include "nodes/pg_list.h"
#include "parse.h"
#include "parser/gramparse.h"
#include "parser/keywords.h"
#include "parser/scansup.h"
#include "utils/builtins.h"

extern char *parseString;
static char *parseCh;

/* some versions of lex define this as a macro */
#if defined(yywrap)
#undef yywrap
#endif /* yywrap */

/* set up my input handler --- need one flavor for flex, one for lex */
#if defined(FLEX_SCANNER)

#define YY_NEVER_INTERACTIVE 1
#define YY_NO_UNPUT
static int myinput(char* buf, int max);
#undef YY_INPUT
#define YY_INPUT(buf,result,max) {result = myinput(buf,max);}

/* No reason to constrain amount of data slurped per myinput() call. */
#define YY_READ_BUF_SIZE 16777216

#else /* !FLEX_SCANNER */

#undef input
int input();
#undef unput
void unput(char);

#endif /* FLEX_SCANNER */

extern YYSTYPE yylval;

/*
 * literalbuf is used to accumulate literal values when multiple rules
 * are needed to parse a single literal.  Call startlit to reset buffer
 * to empty, addlit to add text.  Note that the buffer is palloc'd and
 * starts life afresh on every parse cycle.
 */
static char	   *literalbuf;		/* expandable buffer */
static int		literallen;		/* actual current length */
static int		literalalloc;	/* current allocated buffer size */

#define startlit()  (literalbuf[0] = '\0', literallen = 0)
static void addlit(char *ytext, int yleng);

/*
 * OK, here is a short description of lex/flex rules behavior.
 * The longest pattern which matches an input string is always chosen.
 * For equal-length patterns, the first occurring in the rules list is chosen.
 * INITIAL is the starting state, to which all non-conditional rules apply.
 * Exclusive states change parsing rules while the state is active.  When in
 * an exclusive state, only those rules defined for that state apply.
 *
 * We use exclusive states for quoted strings, extended comments,
 * and to eliminate parsing troubles for numeric strings.
 * Exclusive states:
 *  <xb> binary numeric string - thomas 1997-11-16
 *  <xc> extended C-style comments - thomas 1997-07-12
 *  <xd> delimited identifiers (double-quoted identifiers) - thomas 1997-10-27
 *  <xh> hexadecimal numeric string - thomas 1997-11-16
 *  <xq> quoted strings - thomas 1997-07-30
 */
#define xb 1

#define xc 2

#define xd 3

#define xh 4

#define xq 5

/* Binary number
 */
/* Hexadecimal number
 */
/* Extended quote
 * xqdouble implements SQL92 embedded quote
 * xqcat allows strings to cross input lines
 * Note: reduction of '' and \ sequences to output text is done in scanstr(),
 * not by rules here.  But we do get rid of xqcat sequences here.
 */
/* Delimited quote
 * Allows embedded spaces and other special characters into identifiers.
 */
/* C-style comments
 *
 * The "extended comment" syntax closely resembles allowable operator syntax.
 * The tricky part here is to get lex to recognize a string starting with
 * slash-star as a comment, when interpreting it as an operator would produce
 * a longer match --- remember lex will prefer a longer match!  Also, if we
 * have something like plus-slash-star, lex will think this is a 3-character
 * operator whereas we want to see it as a + operator and a comment start.
 * The solution is two-fold:
 * 1. append {op_chars}* to xcstart so that it matches as much text as
 *    {operator} would. Then the tie-breaker (first matching rule of same
 *    length) ensures xcstart wins.  We put back the extra stuff with yyless()
 *    in case it contains a star-slash that should terminate the comment.
 * 2. In the operator rule, check for slash-star within the operator, and
 *    if found throw it back with yyless().  This handles the plus-slash-star
 *    problem.
 * SQL92-style comments, which start with dash-dash, have similar interactions
 * with the operator rule.
 */
/*
 * "self" is the set of chars that should be returned as single-character
 * tokens.  "op_chars" is the set of chars that can make up "Op" tokens,
 * which can be one or more characters long (but if a single-char token
 * appears in the "self" set, it is not to be returned as an Op).  Note
 * that the sets overlap, but each has some chars that are not in the other.
 *
 * If you change either set, adjust the character lists appearing in the
 * rule for "operator"!
 */
/* we no longer allow unary minus in numbers. 
 * instead we pass it separately to parser. there it gets
 * coerced via doNegate() -- Leon aug 20 1999 
 */
/*
 * In order to make the world safe for Windows and Mac clients as well as
 * Unix ones, we accept either \n or \r as a newline.  A DOS-style \r\n
 * sequence will be seen as two successive newlines, but that doesn't cause
 * any problems.  SQL92-style comments, which start with -- and extend to the
 * next newline, are treated as equivalent to a single whitespace character.
 *
 * NOTE a fine point: if there is no newline following --, we will absorb
 * everything to the end of the input as a comment.  This is correct.  Older
 * versions of Postgres failed to recognize -- as a comment if the input
 * did not end with a newline.
 *
 * XXX perhaps \f (formfeed) should be treated as a newline as well?
 */
/*
 * SQL92 requires at least one newline in the whitespace separating
 * string literals that are to be concatenated.  Silly, but who are we
 * to argue?  Note that {whitespace_with_newline} should not have * after
 * it, whereas {whitespace} should generally have a * after it...
 */
/* DO NOT PUT ANY COMMENTS IN THE FOLLOWING SECTION.
 * AT&T lex does not properly handle C-style comments in this second lex block.
 * So, put comments here. thomas - 1997-09-08
 *
 * Quoted strings must allow some special characters such as single-quote
 *  and newline.
 * Embedded single-quotes are implemented both in the SQL92-standard
 *  style of two adjacent single quotes "''" and in the Postgres/Java style
 *  of escaped-quote "\'".
 * Other embedded escaped characters are matched explicitly and the leading
 *  backslash is dropped from the string. - thomas 1997-09-24
 * Note that xcstart must appear before operator, as explained above!
 *  Also whitespace (comment) must appear before operator.
 */
#line 723 "lex.yy.c"

/* Macros after this point can all be overridden by user definitions in
 * section 1.
 */

#ifndef YY_SKIP_YYWRAP
#ifdef __cplusplus
extern "C" int yywrap YY_PROTO(( void ));
#else
extern int yywrap YY_PROTO(( void ));
#endif
#endif

#ifndef YY_NO_UNPUT
static void yyunput YY_PROTO(( int c, char *buf_ptr ));
#endif

#ifndef yytext_ptr
static void yy_flex_strncpy YY_PROTO(( char *, yyconst char *, int ));
#endif

#ifdef YY_NEED_STRLEN
static int yy_flex_strlen YY_PROTO(( yyconst char * ));
#endif

#ifndef YY_NO_INPUT
#ifdef __cplusplus
static int yyinput YY_PROTO(( void ));
#else
static int input YY_PROTO(( void ));
#endif
#endif

#if YY_STACK_USED
static int yy_start_stack_ptr = 0;
static int yy_start_stack_depth = 0;
static int *yy_start_stack = 0;
#ifndef YY_NO_PUSH_STATE
static void yy_push_state YY_PROTO(( int new_state ));
#endif
#ifndef YY_NO_POP_STATE
static void yy_pop_state YY_PROTO(( void ));
#endif
#ifndef YY_NO_TOP_STATE
static int yy_top_state YY_PROTO(( void ));
#endif

#else
#define YY_NO_PUSH_STATE 1
#define YY_NO_POP_STATE 1
#define YY_NO_TOP_STATE 1
#endif

#ifdef YY_MALLOC_DECL
YY_MALLOC_DECL
#else
#if __STDC__
#ifndef __cplusplus
#include <stdlib.h>
#endif
#else
/* Just try to get by without declaring the routines.  This will fail
 * miserably on non-ANSI systems for which sizeof(size_t) != sizeof(int)
 * or sizeof(void*) != sizeof(int).
 */
#endif
#endif

/* Amount of stuff to slurp up with each read. */
#ifndef YY_READ_BUF_SIZE
#define YY_READ_BUF_SIZE 8192
#endif

/* Copy whatever the last rule matched to the standard output. */

#ifndef ECHO
/* This used to be an fputs(), but since the string might contain NUL's,
 * we now use fwrite().
 */
#define ECHO (void) fwrite( yytext, yyleng, 1, yyout )
#endif

/* Gets input and stuffs it into "buf".  number of characters read, or YY_NULL,
 * is returned in "result".
 */
#ifndef YY_INPUT
#define YY_INPUT(buf,result,max_size) \
	if ( yy_current_buffer->yy_is_interactive ) \
		{ \
		int c = '*', n; \
		for ( n = 0; n < max_size && \
			     (c = getc( yyin )) != EOF && c != '\n'; ++n ) \
			buf[n] = (char) c; \
		if ( c == '\n' ) \
			buf[n++] = (char) c; \
		if ( c == EOF && ferror( yyin ) ) \
			YY_FATAL_ERROR( "input in flex scanner failed" ); \
		result = n; \
		} \
	else if ( ((result = fread( buf, 1, max_size, yyin )) == 0) \
		  && ferror( yyin ) ) \
		YY_FATAL_ERROR( "input in flex scanner failed" );
#endif

/* No semi-colon after return; correct usage is to write "yyterminate();" -
 * we don't want an extra ';' after the "return" because that will cause
 * some compilers to complain about unreachable statements.
 */
#ifndef yyterminate
#define yyterminate() return YY_NULL
#endif

/* Number of entries by which start-condition stack grows. */
#ifndef YY_START_STACK_INCR
#define YY_START_STACK_INCR 25
#endif

/* Report a fatal error. */
#ifndef YY_FATAL_ERROR
#define YY_FATAL_ERROR(msg) yy_fatal_error( msg )
#endif

/* Default declaration of generated scanner - a define so the user can
 * easily add parameters.
 */
#ifndef YY_DECL
#define YY_DECL int yylex YY_PROTO(( void ))
#endif

/* Code executed at the beginning of each rule, after yytext and yyleng
 * have been set up.
 */
#ifndef YY_USER_ACTION
#define YY_USER_ACTION
#endif

/* Code executed at the end of each rule. */
#ifndef YY_BREAK
#define YY_BREAK break;
#endif

#define YY_RULE_SETUP \
	YY_USER_ACTION

YY_DECL
	{
	register yy_state_type yy_current_state;
	register char *yy_cp, *yy_bp;
	register int yy_act;

#line 246 "scan.l"

#line 876 "lex.yy.c"

	if ( yy_init )
		{
		yy_init = 0;

#ifdef YY_USER_INIT
		YY_USER_INIT;
#endif

		if ( ! yy_start )
			yy_start = 1;	/* first start state */

		if ( ! yyin )
			yyin = stdin;

		if ( ! yyout )
			yyout = stdout;

		if ( ! yy_current_buffer )
			yy_current_buffer =
				yy_create_buffer( yyin, YY_BUF_SIZE );

		yy_load_buffer_state();
		}

	while ( 1 )		/* loops until end-of-file is reached */
		{
		yy_cp = yy_c_buf_p;

		/* Support of yytext. */
		*yy_cp = yy_hold_char;

		/* yy_bp points to the position in yy_ch_buf of the start of
		 * the current run.
		 */
		yy_bp = yy_cp;

		yy_current_state = yy_start;
yy_match:
		do
			{
			register YY_CHAR yy_c = yy_ec[YY_SC_TO_UI(*yy_cp)];
			if ( yy_accept[yy_current_state] )
				{
				yy_last_accepting_state = yy_current_state;
				yy_last_accepting_cpos = yy_cp;
				}
			while ( yy_chk[yy_base[yy_current_state] + yy_c] != yy_current_state )
				{
				yy_current_state = (int) yy_def[yy_current_state];
				if ( yy_current_state >= 122 )
					yy_c = yy_meta[(unsigned int) yy_c];
				}
			yy_current_state = yy_nxt[yy_base[yy_current_state] + (unsigned int) yy_c];
			++yy_cp;
			}
		while ( yy_base[yy_current_state] != 572 );

yy_find_action:
		yy_act = yy_accept[yy_current_state];
		if ( yy_act == 0 )
			{ /* have to back up */
			yy_cp = yy_last_accepting_cpos;
			yy_current_state = yy_last_accepting_state;
			yy_act = yy_accept[yy_current_state];
			}

		YY_DO_BEFORE_ACTION;


do_action:	/* This label is used only to access EOF actions. */


		switch ( yy_act )
	{ /* beginning of action switch */
			case 0: /* must back up */
			/* undo the effects of YY_DO_BEFORE_ACTION */
			*yy_cp = yy_hold_char;
			yy_cp = yy_last_accepting_cpos;
			yy_current_state = yy_last_accepting_state;
			goto yy_find_action;

case 1:
YY_RULE_SETUP
#line 247 "scan.l"
{ /* ignore */ }
	YY_BREAK
case 2:
YY_RULE_SETUP
#line 249 "scan.l"
{
					BEGIN(xc);
					/* Put back any characters past slash-star; see above */
					yyless(2);
				}
	YY_BREAK
case 3:
YY_RULE_SETUP
#line 255 "scan.l"
{ BEGIN(INITIAL); }
	YY_BREAK
case 4:
YY_RULE_SETUP
#line 257 "scan.l"
{ /* ignore */ }
	YY_BREAK
case YY_STATE_EOF(xc):
#line 259 "scan.l"
{ elog(ERROR, "Unterminated /* comment"); }
	YY_BREAK
case 5:
YY_RULE_SETUP
#line 261 "scan.l"
{
					BEGIN(xb);
					startlit();
				}
	YY_BREAK
case 6:
YY_RULE_SETUP
#line 265 "scan.l"
{
					char* endptr;

					BEGIN(INITIAL);
					errno = 0;
					yylval.ival = strtol(literalbuf, &endptr, 2);
					if (*endptr != '\0' || errno == ERANGE)
						elog(ERROR, "Bad binary integer input '%s'",
							 literalbuf);
					return ICONST;
				}
	YY_BREAK
case 7:
#line 277 "scan.l"
case 8:
YY_RULE_SETUP
#line 277 "scan.l"
{
					addlit(yytext, yyleng);
				}
	YY_BREAK
case 9:
#line 281 "scan.l"
case 10:
YY_RULE_SETUP
#line 281 "scan.l"
{
					/* ignore */
				}
	YY_BREAK
case YY_STATE_EOF(xb):
#line 284 "scan.l"
{ elog(ERROR, "Unterminated binary integer"); }
	YY_BREAK
case 11:
YY_RULE_SETUP
#line 286 "scan.l"
{
					BEGIN(xh);
					startlit();
				}
	YY_BREAK
case 12:
YY_RULE_SETUP
#line 290 "scan.l"
{
					char* endptr;

					BEGIN(INITIAL);
					errno = 0;
					yylval.ival = strtol(literalbuf, &endptr, 16);
					if (*endptr != '\0' || errno == ERANGE)
						elog(ERROR, "Bad hexadecimal integer input '%s'",
							 literalbuf);
					return ICONST;
				}
	YY_BREAK
case YY_STATE_EOF(xh):
#line 301 "scan.l"
{ elog(ERROR, "Unterminated hexadecimal integer"); }
	YY_BREAK
case 13:
YY_RULE_SETUP
#line 303 "scan.l"
{
					BEGIN(xq);
					startlit();
				}
	YY_BREAK
case 14:
YY_RULE_SETUP
#line 307 "scan.l"
{
					BEGIN(INITIAL);
					yylval.str = scanstr(literalbuf);
					return SCONST;
				}
	YY_BREAK
case 15:
#line 313 "scan.l"
case 16:
#line 314 "scan.l"
case 17:
YY_RULE_SETUP
#line 314 "scan.l"
{
					addlit(yytext, yyleng);
				}
	YY_BREAK
case 18:
YY_RULE_SETUP
#line 317 "scan.l"
{
					/* ignore */
				}
	YY_BREAK
case YY_STATE_EOF(xq):
#line 320 "scan.l"
{ elog(ERROR, "Unterminated quoted string"); }
	YY_BREAK
case 19:
YY_RULE_SETUP
#line 323 "scan.l"
{
					BEGIN(xd);
					startlit();
				}
	YY_BREAK
case 20:
YY_RULE_SETUP
#line 327 "scan.l"
{
					BEGIN(INITIAL);
					if (strlen(literalbuf) >= NAMEDATALEN)
					{
						elog(NOTICE, "identifier \"%s\" will be truncated to \"%.*s\"",
							 literalbuf, NAMEDATALEN-1, literalbuf);
						literalbuf[NAMEDATALEN-1] = '\0';
					}
					yylval.str = pstrdup(literalbuf);
					return IDENT;
				}
	YY_BREAK
case 21:
YY_RULE_SETUP
#line 338 "scan.l"
{
					addlit(yytext, yyleng);
				}
	YY_BREAK
case YY_STATE_EOF(xd):
#line 341 "scan.l"
{ elog(ERROR, "Unterminated quoted identifier"); }
	YY_BREAK
case 22:
YY_RULE_SETUP
#line 343 "scan.l"
{ return TYPECAST; }
	YY_BREAK
case 23:
YY_RULE_SETUP
#line 345 "scan.l"
{ return yytext[0]; }
	YY_BREAK
case 24:
YY_RULE_SETUP
#line 347 "scan.l"
{
					/*
					 * Check for embedded slash-star or dash-dash; those
					 * are comment starts, so operator must stop there.
					 * Note that slash-star or dash-dash at the first
					 * character will match a prior rule, not this one.
					 */
					int		nchars = yyleng;
					char   *slashstar = strstr((char*)yytext, "/*");
					char   *dashdash = strstr((char*)yytext, "--");

					if (slashstar && dashdash)
					{
						/* if both appear, take the first one */
						if (slashstar > dashdash)
							slashstar = dashdash;
					}
					else if (!slashstar)
						slashstar = dashdash;
					if (slashstar)
						nchars = slashstar - ((char*)yytext);

					/*
					 * For SQL92 compatibility, '+' and '-' cannot be the
					 * last char of a multi-char operator unless the operator
					 * contains chars that are not in SQL92 operators.
					 * The idea is to lex '=-' as two operators, but not
					 * to forbid operator names like '?-' that could not be
					 * sequences of SQL92 operators.
					 */
					while (nchars > 1 &&
						   (yytext[nchars-1] == '+' ||
							yytext[nchars-1] == '-'))
					{
						int		ic;

						for (ic = nchars-2; ic >= 0; ic--)
						{
							if (strchr("~!@#&`?$:%^|", yytext[ic]))
								break;
						}
						if (ic >= 0)
							break; /* found a char that makes it OK */
						nchars--; /* else remove the +/-, and check again */
					}

					if (nchars < yyleng)
					{
						/* Strip the unwanted chars from the token */
						yyless(nchars);
						/*
						 * If what we have left is only one char, and it's
						 * one of the characters matching "self", then
						 * return it as a character token the same way
						 * that the "self" rule would have.
						 */
						if (nchars == 1 &&
							strchr(",()[].;$:+-*/%^<>=|", yytext[0]))
							return yytext[0];
					}

					/* Convert "!=" operator to "<>" for compatibility */
					if (strcmp((char*)yytext, "!=") == 0)
						yylval.str = pstrdup("<>");
					else
						yylval.str = pstrdup((char*)yytext);
					return Op;
				}
	YY_BREAK
case 25:
YY_RULE_SETUP
#line 416 "scan.l"
{
					yylval.ival = atol((char*)&yytext[1]);
					return PARAM;
				}
	YY_BREAK
case 26:
YY_RULE_SETUP
#line 421 "scan.l"
{
					char* endptr;

					errno = 0;
					yylval.ival = strtol((char *)yytext, &endptr, 10);
					if (*endptr != '\0' || errno == ERANGE)
					{
						/* integer too large, treat it as a float */
						yylval.str = pstrdup((char*)yytext);
						return FCONST;
					}
					return ICONST;
				}
	YY_BREAK
case 27:
YY_RULE_SETUP
#line 434 "scan.l"
{
					yylval.str = pstrdup((char*)yytext);
					return FCONST;
				}
	YY_BREAK
case 28:
YY_RULE_SETUP
#line 438 "scan.l"
{
					yylval.str = pstrdup((char*)yytext);
					return FCONST;
				}
	YY_BREAK
case 29:
YY_RULE_SETUP
#line 444 "scan.l"
{
					int i;
					ScanKeyword		*keyword;

					for(i = 0; yytext[i]; i++)
						if (isascii((unsigned char)yytext[i]) &&
							isupper(yytext[i]))
							yytext[i] = tolower(yytext[i]);
					if (i >= NAMEDATALEN)
                    {
                        elog(NOTICE, "identifier \"%s\" will be truncated to \"%.*s\"",
                             yytext, NAMEDATALEN-1, yytext);
						yytext[NAMEDATALEN-1] = '\0';
                    }
					keyword = ScanKeywordLookup((char*)yytext);
					if (keyword != NULL) {
						return keyword->value;
					}
					else
					{
						yylval.str = pstrdup((char*)yytext);
						return IDENT;
					}
				}
	YY_BREAK
case 30:
YY_RULE_SETUP
#line 469 "scan.l"
{ return yytext[0]; }
	YY_BREAK
case 31:
YY_RULE_SETUP
#line 471 "scan.l"
ECHO;
	YY_BREAK
#line 1293 "lex.yy.c"
case YY_STATE_EOF(INITIAL):
	yyterminate();

	case YY_END_OF_BUFFER:
		{
		/* Amount of text matched not including the EOB char. */
		int yy_amount_of_matched_text = (int) (yy_cp - yytext_ptr) - 1;

		/* Undo the effects of YY_DO_BEFORE_ACTION. */
		*yy_cp = yy_hold_char;
		YY_RESTORE_YY_MORE_OFFSET

		if ( yy_current_buffer->yy_buffer_status == YY_BUFFER_NEW )
			{
			/* We're scanning a new file or input source.  It's
			 * possible that this happened because the user
			 * just pointed yyin at a new source and called
			 * yylex().  If so, then we have to assure
			 * consistency between yy_current_buffer and our
			 * globals.  Here is the right place to do so, because
			 * this is the first action (other than possibly a
			 * back-up) that will match for the new input source.
			 */
			yy_n_chars = yy_current_buffer->yy_n_chars;
			yy_current_buffer->yy_input_file = yyin;
			yy_current_buffer->yy_buffer_status = YY_BUFFER_NORMAL;
			}

		/* Note that here we test for yy_c_buf_p "<=" to the position
		 * of the first EOB in the buffer, since yy_c_buf_p will
		 * already have been incremented past the NUL character
		 * (since all states make transitions on EOB to the
		 * end-of-buffer state).  Contrast this with the test
		 * in input().
		 */
		if ( yy_c_buf_p <= &yy_current_buffer->yy_ch_buf[yy_n_chars] )
			{ /* This was really a NUL. */
			yy_state_type yy_next_state;

			yy_c_buf_p = yytext_ptr + yy_amount_of_matched_text;

			yy_current_state = yy_get_previous_state();

			/* Okay, we're now positioned to make the NUL
			 * transition.  We couldn't have
			 * yy_get_previous_state() go ahead and do it
			 * for us because it doesn't know how to deal
			 * with the possibility of jamming (and we don't
			 * want to build jamming into it because then it
			 * will run more slowly).
			 */

			yy_next_state = yy_try_NUL_trans( yy_current_state );

			yy_bp = yytext_ptr + YY_MORE_ADJ;

			if ( yy_next_state )
				{
				/* Consume the NUL. */
				yy_cp = ++yy_c_buf_p;
				yy_current_state = yy_next_state;
				goto yy_match;
				}

			else
				{
				yy_cp = yy_c_buf_p;
				goto yy_find_action;
				}
			}

		else switch ( yy_get_next_buffer() )
			{
			case EOB_ACT_END_OF_FILE:
				{
				yy_did_buffer_switch_on_eof = 0;

				if ( yywrap() )
					{
					/* Note: because we've taken care in
					 * yy_get_next_buffer() to have set up
					 * yytext, we can now set up
					 * yy_c_buf_p so that if some total
					 * hoser (like flex itself) wants to
					 * call the scanner after we return the
					 * YY_NULL, it'll still work - another
					 * YY_NULL will get returned.
					 */
					yy_c_buf_p = yytext_ptr + YY_MORE_ADJ;

					yy_act = YY_STATE_EOF(YY_START);
					goto do_action;
					}

				else
					{
					if ( ! yy_did_buffer_switch_on_eof )
						YY_NEW_FILE;
					}
				break;
				}

			case EOB_ACT_CONTINUE_SCAN:
				yy_c_buf_p =
					yytext_ptr + yy_amount_of_matched_text;

				yy_current_state = yy_get_previous_state();

				yy_cp = yy_c_buf_p;
				yy_bp = yytext_ptr + YY_MORE_ADJ;
				goto yy_match;

			case EOB_ACT_LAST_MATCH:
				yy_c_buf_p =
				&yy_current_buffer->yy_ch_buf[yy_n_chars];

				yy_current_state = yy_get_previous_state();

				yy_cp = yy_c_buf_p;
				yy_bp = yytext_ptr + YY_MORE_ADJ;
				goto yy_find_action;
			}
		break;
		}

	default:
		YY_FATAL_ERROR(
			"fatal flex scanner internal error--no action found" );
	} /* end of action switch */
		} /* end of scanning one token */
	} /* end of yylex */


/* yy_get_next_buffer - try to read in a new buffer
 *
 * Returns a code representing an action:
 *	EOB_ACT_LAST_MATCH -
 *	EOB_ACT_CONTINUE_SCAN - continue scanning from current position
 *	EOB_ACT_END_OF_FILE - end of file
 */

static int yy_get_next_buffer()
	{
	register char *dest = yy_current_buffer->yy_ch_buf;
	register char *source = yytext_ptr;
	register int number_to_move, i;
	int ret_val;

	if ( yy_c_buf_p > &yy_current_buffer->yy_ch_buf[yy_n_chars + 1] )
		YY_FATAL_ERROR(
		"fatal flex scanner internal error--end of buffer missed" );

	if ( yy_current_buffer->yy_fill_buffer == 0 )
		{ /* Don't try to fill the buffer, so this is an EOF. */
		if ( yy_c_buf_p - yytext_ptr - YY_MORE_ADJ == 1 )
			{
			/* We matched a single character, the EOB, so
			 * treat this as a final EOF.
			 */
			return EOB_ACT_END_OF_FILE;
			}

		else
			{
			/* We matched some text prior to the EOB, first
			 * process it.
			 */
			return EOB_ACT_LAST_MATCH;
			}
		}

	/* Try to read more data. */

	/* First move last chars to start of buffer. */
	number_to_move = (int) (yy_c_buf_p - yytext_ptr) - 1;

	for ( i = 0; i < number_to_move; ++i )
		*(dest++) = *(source++);

	if ( yy_current_buffer->yy_buffer_status == YY_BUFFER_EOF_PENDING )
		/* don't do the read, it's not guaranteed to return an EOF,
		 * just force an EOF
		 */
		yy_current_buffer->yy_n_chars = yy_n_chars = 0;

	else
		{
		int num_to_read =
			yy_current_buffer->yy_buf_size - number_to_move - 1;

		while ( num_to_read <= 0 )
			{ /* Not enough room in the buffer - grow it. */
#ifdef YY_USES_REJECT
			YY_FATAL_ERROR(
"input buffer overflow, can't enlarge buffer because scanner uses REJECT" );
#else

			/* just a shorter name for the current buffer */
			YY_BUFFER_STATE b = yy_current_buffer;

			int yy_c_buf_p_offset =
				(int) (yy_c_buf_p - b->yy_ch_buf);

			if ( b->yy_is_our_buffer )
				{
				int new_size = b->yy_buf_size * 2;

				if ( new_size <= 0 )
					b->yy_buf_size += b->yy_buf_size / 8;
				else
					b->yy_buf_size *= 2;

				b->yy_ch_buf = (char *)
					/* Include room in for 2 EOB chars. */
					yy_flex_realloc( (void *) b->yy_ch_buf,
							 b->yy_buf_size + 2 );
				}
			else
				/* Can't grow it, we don't own it. */
				b->yy_ch_buf = 0;

			if ( ! b->yy_ch_buf )
				YY_FATAL_ERROR(
				"fatal error - scanner input buffer overflow" );

			yy_c_buf_p = &b->yy_ch_buf[yy_c_buf_p_offset];

			num_to_read = yy_current_buffer->yy_buf_size -
						number_to_move - 1;
#endif
			}

		if ( num_to_read > YY_READ_BUF_SIZE )
			num_to_read = YY_READ_BUF_SIZE;

		/* Read in more data. */
		YY_INPUT( (&yy_current_buffer->yy_ch_buf[number_to_move]),
			yy_n_chars, num_to_read );

		yy_current_buffer->yy_n_chars = yy_n_chars;
		}

	if ( yy_n_chars == 0 )
		{
		if ( number_to_move == YY_MORE_ADJ )
			{
			ret_val = EOB_ACT_END_OF_FILE;
			yyrestart( yyin );
			}

		else
			{
			ret_val = EOB_ACT_LAST_MATCH;
			yy_current_buffer->yy_buffer_status =
				YY_BUFFER_EOF_PENDING;
			}
		}

	else
		ret_val = EOB_ACT_CONTINUE_SCAN;

	yy_n_chars += number_to_move;
	yy_current_buffer->yy_ch_buf[yy_n_chars] = YY_END_OF_BUFFER_CHAR;
	yy_current_buffer->yy_ch_buf[yy_n_chars + 1] = YY_END_OF_BUFFER_CHAR;

	yytext_ptr = &yy_current_buffer->yy_ch_buf[0];

	return ret_val;
	}


/* yy_get_previous_state - get the state just before the EOB char was reached */

static yy_state_type yy_get_previous_state()
	{
	register yy_state_type yy_current_state;
	register char *yy_cp;

	yy_current_state = yy_start;

	for ( yy_cp = yytext_ptr + YY_MORE_ADJ; yy_cp < yy_c_buf_p; ++yy_cp )
		{
		register YY_CHAR yy_c = (*yy_cp ? yy_ec[YY_SC_TO_UI(*yy_cp)] : 1);
		if ( yy_accept[yy_current_state] )
			{
			yy_last_accepting_state = yy_current_state;
			yy_last_accepting_cpos = yy_cp;
			}
		while ( yy_chk[yy_base[yy_current_state] + yy_c] != yy_current_state )
			{
			yy_current_state = (int) yy_def[yy_current_state];
			if ( yy_current_state >= 122 )
				yy_c = yy_meta[(unsigned int) yy_c];
			}
		yy_current_state = yy_nxt[yy_base[yy_current_state] + (unsigned int) yy_c];
		}

	return yy_current_state;
	}


/* yy_try_NUL_trans - try to make a transition on the NUL character
 *
 * synopsis
 *	next_state = yy_try_NUL_trans( current_state );
 */

#ifdef YY_USE_PROTOS
static yy_state_type yy_try_NUL_trans( yy_state_type yy_current_state )
#else
static yy_state_type yy_try_NUL_trans( yy_current_state )
yy_state_type yy_current_state;
#endif
	{
	register int yy_is_jam;
	register char *yy_cp = yy_c_buf_p;

	register YY_CHAR yy_c = 1;
	if ( yy_accept[yy_current_state] )
		{
		yy_last_accepting_state = yy_current_state;
		yy_last_accepting_cpos = yy_cp;
		}
	while ( yy_chk[yy_base[yy_current_state] + yy_c] != yy_current_state )
		{
		yy_current_state = (int) yy_def[yy_current_state];
		if ( yy_current_state >= 122 )
			yy_c = yy_meta[(unsigned int) yy_c];
		}
	yy_current_state = yy_nxt[yy_base[yy_current_state] + (unsigned int) yy_c];
	yy_is_jam = (yy_current_state == 121);

	return yy_is_jam ? 0 : yy_current_state;
	}


#ifndef YY_NO_UNPUT
#ifdef YY_USE_PROTOS
static void yyunput( int c, register char *yy_bp )
#else
static void yyunput( c, yy_bp )
int c;
register char *yy_bp;
#endif
	{
	register char *yy_cp = yy_c_buf_p;

	/* undo effects of setting up yytext */
	*yy_cp = yy_hold_char;

	if ( yy_cp < yy_current_buffer->yy_ch_buf + 2 )
		{ /* need to shift things up to make room */
		/* +2 for EOB chars. */
		register int number_to_move = yy_n_chars + 2;
		register char *dest = &yy_current_buffer->yy_ch_buf[
					yy_current_buffer->yy_buf_size + 2];
		register char *source =
				&yy_current_buffer->yy_ch_buf[number_to_move];

		while ( source > yy_current_buffer->yy_ch_buf )
			*--dest = *--source;

		yy_cp += (int) (dest - source);
		yy_bp += (int) (dest - source);
		yy_current_buffer->yy_n_chars =
			yy_n_chars = yy_current_buffer->yy_buf_size;

		if ( yy_cp < yy_current_buffer->yy_ch_buf + 2 )
			YY_FATAL_ERROR( "flex scanner push-back overflow" );
		}

	*--yy_cp = (char) c;


	yytext_ptr = yy_bp;
	yy_hold_char = *yy_cp;
	yy_c_buf_p = yy_cp;
	}
#endif	/* ifndef YY_NO_UNPUT */


#ifdef __cplusplus
static int yyinput()
#else
static int input()
#endif
	{
	int c;

	*yy_c_buf_p = yy_hold_char;

	if ( *yy_c_buf_p == YY_END_OF_BUFFER_CHAR )
		{
		/* yy_c_buf_p now points to the character we want to return.
		 * If this occurs *before* the EOB characters, then it's a
		 * valid NUL; if not, then we've hit the end of the buffer.
		 */
		if ( yy_c_buf_p < &yy_current_buffer->yy_ch_buf[yy_n_chars] )
			/* This was really a NUL. */
			*yy_c_buf_p = '\0';

		else
			{ /* need more input */
			int offset = yy_c_buf_p - yytext_ptr;
			++yy_c_buf_p;

			switch ( yy_get_next_buffer() )
				{
				case EOB_ACT_LAST_MATCH:
					/* This happens because yy_g_n_b()
					 * sees that we've accumulated a
					 * token and flags that we need to
					 * try matching the token before
					 * proceeding.  But for input(),
					 * there's no matching to consider.
					 * So convert the EOB_ACT_LAST_MATCH
					 * to EOB_ACT_END_OF_FILE.
					 */

					/* Reset buffer status. */
					yyrestart( yyin );

					/* fall through */

				case EOB_ACT_END_OF_FILE:
					{
					if ( yywrap() )
						return EOF;

					if ( ! yy_did_buffer_switch_on_eof )
						YY_NEW_FILE;
#ifdef __cplusplus
					return yyinput();
#else
					return input();
#endif
					}

				case EOB_ACT_CONTINUE_SCAN:
					yy_c_buf_p = yytext_ptr + offset;
					break;
				}
			}
		}

	c = *(unsigned char *) yy_c_buf_p;	/* cast for 8-bit char's */
	*yy_c_buf_p = '\0';	/* preserve yytext */
	yy_hold_char = *++yy_c_buf_p;


	return c;
	}


#ifdef YY_USE_PROTOS
void yyrestart( FILE *input_file )
#else
void yyrestart( input_file )
FILE *input_file;
#endif
	{
	if ( ! yy_current_buffer )
		yy_current_buffer = yy_create_buffer( yyin, YY_BUF_SIZE );

	yy_init_buffer( yy_current_buffer, input_file );
	yy_load_buffer_state();
	}


#ifdef YY_USE_PROTOS
void yy_switch_to_buffer( YY_BUFFER_STATE new_buffer )
#else
void yy_switch_to_buffer( new_buffer )
YY_BUFFER_STATE new_buffer;
#endif
	{
	if ( yy_current_buffer == new_buffer )
		return;

	if ( yy_current_buffer )
		{
		/* Flush out information for old buffer. */
		*yy_c_buf_p = yy_hold_char;
		yy_current_buffer->yy_buf_pos = yy_c_buf_p;
		yy_current_buffer->yy_n_chars = yy_n_chars;
		}

	yy_current_buffer = new_buffer;
	yy_load_buffer_state();

	/* We don't actually know whether we did this switch during
	 * EOF (yywrap()) processing, but the only time this flag
	 * is looked at is after yywrap() is called, so it's safe
	 * to go ahead and always set it.
	 */
	yy_did_buffer_switch_on_eof = 1;
	}


#ifdef YY_USE_PROTOS
void yy_load_buffer_state( void )
#else
void yy_load_buffer_state()
#endif
	{
	yy_n_chars = yy_current_buffer->yy_n_chars;
	yytext_ptr = yy_c_buf_p = yy_current_buffer->yy_buf_pos;
	yyin = yy_current_buffer->yy_input_file;
	yy_hold_char = *yy_c_buf_p;
	}


#ifdef YY_USE_PROTOS
YY_BUFFER_STATE yy_create_buffer( FILE *file, int size )
#else
YY_BUFFER_STATE yy_create_buffer( file, size )
FILE *file;
int size;
#endif
	{
	YY_BUFFER_STATE b;

	b = (YY_BUFFER_STATE) yy_flex_alloc( sizeof( struct yy_buffer_state ) );
	if ( ! b )
		YY_FATAL_ERROR( "out of dynamic memory in yy_create_buffer()" );

	b->yy_buf_size = size;

	/* yy_ch_buf has to be 2 characters longer than the size given because
	 * we need to put in 2 end-of-buffer characters.
	 */
	b->yy_ch_buf = (char *) yy_flex_alloc( b->yy_buf_size + 2 );
	if ( ! b->yy_ch_buf )
		YY_FATAL_ERROR( "out of dynamic memory in yy_create_buffer()" );

	b->yy_is_our_buffer = 1;

	yy_init_buffer( b, file );

	return b;
	}


#ifdef YY_USE_PROTOS
void yy_delete_buffer( YY_BUFFER_STATE b )
#else
void yy_delete_buffer( b )
YY_BUFFER_STATE b;
#endif
	{
	if ( ! b )
		return;

	if ( b == yy_current_buffer )
		yy_current_buffer = (YY_BUFFER_STATE) 0;

	if ( b->yy_is_our_buffer )
		yy_flex_free( (void *) b->yy_ch_buf );

	yy_flex_free( (void *) b );
	}


#ifndef YY_ALWAYS_INTERACTIVE
#ifndef YY_NEVER_INTERACTIVE
extern int isatty YY_PROTO(( int ));
#endif
#endif

#ifdef YY_USE_PROTOS
void yy_init_buffer( YY_BUFFER_STATE b, FILE *file )
#else
void yy_init_buffer( b, file )
YY_BUFFER_STATE b;
FILE *file;
#endif


	{
	yy_flush_buffer( b );

	b->yy_input_file = file;
	b->yy_fill_buffer = 1;

#if YY_ALWAYS_INTERACTIVE
	b->yy_is_interactive = 1;
#else
#if YY_NEVER_INTERACTIVE
	b->yy_is_interactive = 0;
#else
	b->yy_is_interactive = file ? (isatty( fileno(file) ) > 0) : 0;
#endif
#endif
	}


#ifdef YY_USE_PROTOS
void yy_flush_buffer( YY_BUFFER_STATE b )
#else
void yy_flush_buffer( b )
YY_BUFFER_STATE b;
#endif

	{
	if ( ! b )
		return;

	b->yy_n_chars = 0;

	/* We always need two end-of-buffer characters.  The first causes
	 * a transition to the end-of-buffer state.  The second causes
	 * a jam in that state.
	 */
	b->yy_ch_buf[0] = YY_END_OF_BUFFER_CHAR;
	b->yy_ch_buf[1] = YY_END_OF_BUFFER_CHAR;

	b->yy_buf_pos = &b->yy_ch_buf[0];

	b->yy_at_bol = 1;
	b->yy_buffer_status = YY_BUFFER_NEW;

	if ( b == yy_current_buffer )
		yy_load_buffer_state();
	}


#ifndef YY_NO_SCAN_BUFFER
#ifdef YY_USE_PROTOS
YY_BUFFER_STATE yy_scan_buffer( char *base, yy_size_t size )
#else
YY_BUFFER_STATE yy_scan_buffer( base, size )
char *base;
yy_size_t size;
#endif
	{
	YY_BUFFER_STATE b;

	if ( size < 2 ||
	     base[size-2] != YY_END_OF_BUFFER_CHAR ||
	     base[size-1] != YY_END_OF_BUFFER_CHAR )
		/* They forgot to leave room for the EOB's. */
		return 0;

	b = (YY_BUFFER_STATE) yy_flex_alloc( sizeof( struct yy_buffer_state ) );
	if ( ! b )
		YY_FATAL_ERROR( "out of dynamic memory in yy_scan_buffer()" );

	b->yy_buf_size = size - 2;	/* "- 2" to take care of EOB's */
	b->yy_buf_pos = b->yy_ch_buf = base;
	b->yy_is_our_buffer = 0;
	b->yy_input_file = 0;
	b->yy_n_chars = b->yy_buf_size;
	b->yy_is_interactive = 0;
	b->yy_at_bol = 1;
	b->yy_fill_buffer = 0;
	b->yy_buffer_status = YY_BUFFER_NEW;

	yy_switch_to_buffer( b );

	return b;
	}
#endif


#ifndef YY_NO_SCAN_STRING
#ifdef YY_USE_PROTOS
YY_BUFFER_STATE yy_scan_string( yyconst char *yy_str )
#else
YY_BUFFER_STATE yy_scan_string( yy_str )
yyconst char *yy_str;
#endif
	{
	int len;
	for ( len = 0; yy_str[len]; ++len )
		;

	return yy_scan_bytes( yy_str, len );
	}
#endif


#ifndef YY_NO_SCAN_BYTES
#ifdef YY_USE_PROTOS
YY_BUFFER_STATE yy_scan_bytes( yyconst char *bytes, int len )
#else
YY_BUFFER_STATE yy_scan_bytes( bytes, len )
yyconst char *bytes;
int len;
#endif
	{
	YY_BUFFER_STATE b;
	char *buf;
	yy_size_t n;
	int i;

	/* Get memory for full buffer, including space for trailing EOB's. */
	n = len + 2;
	buf = (char *) yy_flex_alloc( n );
	if ( ! buf )
		YY_FATAL_ERROR( "out of dynamic memory in yy_scan_bytes()" );

	for ( i = 0; i < len; ++i )
		buf[i] = bytes[i];

	buf[len] = buf[len+1] = YY_END_OF_BUFFER_CHAR;

	b = yy_scan_buffer( buf, n );
	if ( ! b )
		YY_FATAL_ERROR( "bad buffer in yy_scan_bytes()" );

	/* It's okay to grow etc. this buffer, and we should throw it
	 * away when we're done.
	 */
	b->yy_is_our_buffer = 1;

	return b;
	}
#endif


#ifndef YY_NO_PUSH_STATE
#ifdef YY_USE_PROTOS
static void yy_push_state( int new_state )
#else
static void yy_push_state( new_state )
int new_state;
#endif
	{
	if ( yy_start_stack_ptr >= yy_start_stack_depth )
		{
		yy_size_t new_size;

		yy_start_stack_depth += YY_START_STACK_INCR;
		new_size = yy_start_stack_depth * sizeof( int );

		if ( ! yy_start_stack )
			yy_start_stack = (int *) yy_flex_alloc( new_size );

		else
			yy_start_stack = (int *) yy_flex_realloc(
					(void *) yy_start_stack, new_size );

		if ( ! yy_start_stack )
			YY_FATAL_ERROR(
			"out of memory expanding start-condition stack" );
		}

	yy_start_stack[yy_start_stack_ptr++] = YY_START;

	BEGIN(new_state);
	}
#endif


#ifndef YY_NO_POP_STATE
static void yy_pop_state()
	{
	if ( --yy_start_stack_ptr < 0 )
		YY_FATAL_ERROR( "start-condition stack underflow" );

	BEGIN(yy_start_stack[yy_start_stack_ptr]);
	}
#endif


#ifndef YY_NO_TOP_STATE
static int yy_top_state()
	{
	return yy_start_stack[yy_start_stack_ptr - 1];
	}
#endif

#ifndef YY_EXIT_FAILURE
#define YY_EXIT_FAILURE 2
#endif

#ifdef YY_USE_PROTOS
static void yy_fatal_error( yyconst char msg[] )
#else
static void yy_fatal_error( msg )
char msg[];
#endif
	{
	(void) fprintf( stderr, "%s\n", msg );
	exit( YY_EXIT_FAILURE );
	}



/* Redefine yyless() so it works in section 3 code. */

#undef yyless
#define yyless(n) \
	do \
		{ \
		/* Undo effects of setting up yytext. */ \
		yytext[yyleng] = yy_hold_char; \
		yy_c_buf_p = yytext + n; \
		yy_hold_char = *yy_c_buf_p; \
		*yy_c_buf_p = '\0'; \
		yyleng = n; \
		} \
	while ( 0 )


/* Internal utility routines. */

#ifndef yytext_ptr
#ifdef YY_USE_PROTOS
static void yy_flex_strncpy( char *s1, yyconst char *s2, int n )
#else
static void yy_flex_strncpy( s1, s2, n )
char *s1;
yyconst char *s2;
int n;
#endif
	{
	register int i;
	for ( i = 0; i < n; ++i )
		s1[i] = s2[i];
	}
#endif

#ifdef YY_NEED_STRLEN
#ifdef YY_USE_PROTOS
static int yy_flex_strlen( yyconst char *s )
#else
static int yy_flex_strlen( s )
yyconst char *s;
#endif
	{
	register int n;
	for ( n = 0; s[n]; ++n )
		;

	return n;
	}
#endif


#ifdef YY_USE_PROTOS
static void *yy_flex_alloc( yy_size_t size )
#else
static void *yy_flex_alloc( size )
yy_size_t size;
#endif
	{
	return (void *) malloc( size );
	}

#ifdef YY_USE_PROTOS
static void *yy_flex_realloc( void *ptr, yy_size_t size )
#else
static void *yy_flex_realloc( ptr, size )
void *ptr;
yy_size_t size;
#endif
	{
	/* The cast to (char *) in the following accommodates both
	 * implementations that use char* generic pointers, and those
	 * that use void* generic pointers.  It works with the latter
	 * because both ANSI C and C++ allow castless assignment from
	 * any pointer type to void*, and deal with argument conversions
	 * as though doing an assignment.
	 */
	return (void *) realloc( (char *) ptr, size );
	}

#ifdef YY_USE_PROTOS
static void yy_flex_free( void *ptr )
#else
static void yy_flex_free( ptr )
void *ptr;
#endif
	{
	free( ptr );
	}

#if YY_MAIN
int main()
	{
	yylex();
	return 0;
	}
#endif
#line 471 "scan.l"


void yyerror(const char * message)
{
	elog(ERROR, "parser: %s at or near \"%s\"", message, yytext);
}

int yywrap()
{
	return(1);
}

/*
 init_io:
	called by postgres before any actual parsing is done
*/
void
init_io()
{
	/* it's important to set this to NULL
	   because input()/myinput() checks the non-nullness of parseCh
	   to know when to pass the string to lex/flex */
	parseCh = NULL;

	/* initialize literal buffer to a reasonable but expansible size */
	literalalloc = 128;
	literalbuf = (char *) palloc(literalalloc);
	startlit();

#if defined(FLEX_SCANNER)
	if (YY_CURRENT_BUFFER)
		yy_flush_buffer(YY_CURRENT_BUFFER);
#endif /* FLEX_SCANNER */
	BEGIN INITIAL;
}

static void
addlit(char *ytext, int yleng)
{
	/* enlarge buffer if needed */
	if ((literallen+yleng) >= literalalloc)
	{
		do {
			literalalloc *= 2;
		} while ((literallen+yleng) >= literalalloc);
		literalbuf = (char *) repalloc(literalbuf, literalalloc);
	}
	/* append data --- note we assume ytext is null-terminated */
	memcpy(literalbuf+literallen, ytext, yleng+1);
	literallen += yleng;
}

#if !defined(FLEX_SCANNER)

/* get lex input from a string instead of from stdin */
int
input()
{
	if (parseCh == NULL)
		parseCh = parseString;
	if (*parseCh == '\0')
		return(0);
	else
		return(*parseCh++);
}

/* undo lex input from a string instead of from stdin */
void
unput(char c)
{
	if (parseCh == NULL)
		elog(FATAL, "Unput() failed.\n");
	else if (c != 0)
		*--parseCh = c;
}

#endif /* !defined(FLEX_SCANNER) */

#ifdef FLEX_SCANNER

/* input routine for flex to read input from a string instead of a file */
static int
myinput(char* buf, int max)
{
	int len;

	if (parseCh == NULL)
		parseCh = parseString;
	len = strlen(parseCh);		/* remaining data available */
	/* Note: this code used to think that flex wants a null-terminated
	 * string.  It does NOT, and returning 1 less character than it asks
	 * for will cause failure under the right boundary conditions.  So
	 * shut up and fill the buffer to the limit, you hear?
	 */
	if (len > max)
		len = max;
	if (len > 0)
		memcpy(buf, parseCh, len);
	parseCh += len;
	return len;
}

#endif /* FLEX_SCANNER */
