776f199d01
sqlite does not treat # as the start of a to-end-of-line comment. It cannot trivially be treated as such because at startup sqlite parses statements containing the #-character. Thus, only after sqlite has been initialized can it be treated the same way as --.
769 lines
24 KiB
C
769 lines
24 KiB
C
/*
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** 2001 September 15
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**
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** The author disclaims copyright to this source code. In place of
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** a legal notice, here is a blessing:
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**
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** May you do good and not evil.
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** May you find forgiveness for yourself and forgive others.
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** May you share freely, never taking more than you give.
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**
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*************************************************************************
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** An tokenizer for SQL
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**
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** This file contains C code that splits an SQL input string up into
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** individual tokens and sends those tokens one-by-one over to the
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** parser for analysis.
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*/
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#include "sqliteInt.h"
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#include <stdlib.h>
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/* Character classes for tokenizing
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**
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** In the sqlite3GetToken() function, a switch() on aiClass[c] is implemented
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** using a lookup table, whereas a switch() directly on c uses a binary search.
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** The lookup table is much faster. To maximize speed, and to ensure that
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** a lookup table is used, all of the classes need to be small integers and
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** all of them need to be used within the switch.
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*/
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#define CC_X 0 /* The letter 'x', or start of BLOB literal */
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#define CC_KYWD 1 /* Alphabetics or '_'. Usable in a keyword */
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#define CC_ID 2 /* unicode characters usable in IDs */
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#define CC_DIGIT 3 /* Digits */
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#define CC_DOLLAR 4 /* '$' */
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#define CC_VARALPHA 5 /* '@', '#', ':'. Alphabetic SQL variables */
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#define CC_VARNUM 6 /* '?'. Numeric SQL variables */
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#define CC_SPACE 7 /* Space characters */
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#define CC_QUOTE 8 /* '"', '\'', or '`'. String literals, quoted ids */
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#define CC_QUOTE2 9 /* '['. [...] style quoted ids */
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#define CC_PIPE 10 /* '|'. Bitwise OR or concatenate */
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#define CC_MINUS 11 /* '-'. Minus or SQL-style comment */
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#define CC_LT 12 /* '<'. Part of < or <= or <> */
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#define CC_GT 13 /* '>'. Part of > or >= */
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#define CC_EQ 14 /* '='. Part of = or == */
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#define CC_BANG 15 /* '!'. Part of != */
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#define CC_SLASH 16 /* '/'. / or c-style comment */
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#define CC_LP 17 /* '(' */
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#define CC_RP 18 /* ')' */
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#define CC_SEMI 19 /* ';' */
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#define CC_PLUS 20 /* '+' */
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#define CC_STAR 21 /* '*' */
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#define CC_PERCENT 22 /* '%' */
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#define CC_COMMA 23 /* ',' */
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#define CC_AND 24 /* '&' */
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#define CC_TILDA 25 /* '~' */
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#define CC_DOT 26 /* '.' */
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#define CC_ILLEGAL 27 /* Illegal character */
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static const unsigned char aiClass[] = {
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#ifdef SQLITE_ASCII
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/* x0 x1 x2 x3 x4 x5 x6 x7 x8 x9 xa xb xc xd xe xf */
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/* 0x */ 27, 27, 27, 27, 27, 27, 27, 27, 27, 7, 7, 27, 7, 7, 27, 27,
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/* 1x */ 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27,
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#ifdef MAXSCALE
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/* 2x */ 7, 15, 8, 5, 2, 22, 24, 8, 17, 18, 21, 20, 23, 11, 26, 16,
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#else
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/* 2x */ 7, 15, 8, 5, 4, 22, 24, 8, 17, 18, 21, 20, 23, 11, 26, 16,
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#endif
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/* 3x */ 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 5, 19, 12, 14, 13, 6,
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/* 4x */ 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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/* 5x */ 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 9, 27, 27, 27, 1,
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/* 6x */ 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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/* 7x */ 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 27, 10, 27, 25, 27,
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/* 8x */ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
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/* 9x */ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
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/* Ax */ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
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/* Bx */ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
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/* Cx */ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
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/* Dx */ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
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/* Ex */ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
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/* Fx */ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2
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#endif
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#ifdef SQLITE_EBCDIC
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/* x0 x1 x2 x3 x4 x5 x6 x7 x8 x9 xa xb xc xd xe xf */
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/* 0x */ 27, 27, 27, 27, 27, 7, 27, 27, 27, 27, 27, 27, 7, 7, 27, 27,
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/* 1x */ 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27,
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/* 2x */ 27, 27, 27, 27, 27, 7, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27,
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/* 3x */ 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27,
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/* 4x */ 7, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 12, 17, 20, 10,
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/* 5x */ 24, 27, 27, 27, 27, 27, 27, 27, 27, 27, 15, 4, 21, 18, 19, 27,
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/* 6x */ 11, 16, 27, 27, 27, 27, 27, 27, 27, 27, 27, 23, 22, 1, 13, 7,
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/* 7x */ 27, 27, 27, 27, 27, 27, 27, 27, 27, 8, 5, 5, 5, 8, 14, 8,
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/* 8x */ 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 27, 27, 27, 27, 27, 27,
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/* 9x */ 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 27, 27, 27, 27, 27, 27,
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/* 9x */ 25, 1, 1, 1, 1, 1, 1, 0, 1, 1, 27, 27, 27, 27, 27, 27,
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/* Bx */ 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 9, 27, 27, 27, 27, 27,
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/* Cx */ 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 27, 27, 27, 27, 27, 27,
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/* Dx */ 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 27, 27, 27, 27, 27, 27,
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/* Ex */ 27, 27, 1, 1, 1, 1, 1, 0, 1, 1, 27, 27, 27, 27, 27, 27,
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/* Fx */ 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 27, 27, 27, 27, 27, 27,
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#endif
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};
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/*
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** The charMap() macro maps alphabetic characters (only) into their
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** lower-case ASCII equivalent. On ASCII machines, this is just
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** an upper-to-lower case map. On EBCDIC machines we also need
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** to adjust the encoding. The mapping is only valid for alphabetics
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** which are the only characters for which this feature is used.
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**
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** Used by keywordhash.h
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*/
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#ifdef SQLITE_ASCII
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# define charMap(X) sqlite3UpperToLower[(unsigned char)X]
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#endif
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#ifdef SQLITE_EBCDIC
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# define charMap(X) ebcdicToAscii[(unsigned char)X]
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const unsigned char ebcdicToAscii[] = {
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/* 0 1 2 3 4 5 6 7 8 9 A B C D E F */
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x */
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 1x */
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 2x */
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 3x */
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 4x */
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 5x */
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 95, 0, 0, /* 6x */
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 7x */
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0, 97, 98, 99,100,101,102,103,104,105, 0, 0, 0, 0, 0, 0, /* 8x */
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0,106,107,108,109,110,111,112,113,114, 0, 0, 0, 0, 0, 0, /* 9x */
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0, 0,115,116,117,118,119,120,121,122, 0, 0, 0, 0, 0, 0, /* Ax */
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* Bx */
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0, 97, 98, 99,100,101,102,103,104,105, 0, 0, 0, 0, 0, 0, /* Cx */
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0,106,107,108,109,110,111,112,113,114, 0, 0, 0, 0, 0, 0, /* Dx */
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0, 0,115,116,117,118,119,120,121,122, 0, 0, 0, 0, 0, 0, /* Ex */
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* Fx */
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};
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#endif
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/*
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** The sqlite3KeywordCode function looks up an identifier to determine if
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** it is a keyword. If it is a keyword, the token code of that keyword is
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** returned. If the input is not a keyword, TK_ID is returned.
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**
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** The implementation of this routine was generated by a program,
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** mkkeywordhash.c, located in the tool subdirectory of the distribution.
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** The output of the mkkeywordhash.c program is written into a file
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** named keywordhash.h and then included into this source file by
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** the #include below.
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*/
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#include "keywordhash.h"
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/*
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** If X is a character that can be used in an identifier then
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** IdChar(X) will be true. Otherwise it is false.
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**
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** For ASCII, any character with the high-order bit set is
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** allowed in an identifier. For 7-bit characters,
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** sqlite3IsIdChar[X] must be 1.
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**
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** For EBCDIC, the rules are more complex but have the same
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** end result.
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**
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** Ticket #1066. the SQL standard does not allow '$' in the
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** middle of identifiers. But many SQL implementations do.
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** SQLite will allow '$' in identifiers for compatibility.
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** But the feature is undocumented.
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*/
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#ifdef SQLITE_ASCII
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#define IdChar(C) ((sqlite3CtypeMap[(unsigned char)C]&0x46)!=0)
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#endif
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#ifdef SQLITE_EBCDIC
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const char sqlite3IsEbcdicIdChar[] = {
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/* x0 x1 x2 x3 x4 x5 x6 x7 x8 x9 xA xB xC xD xE xF */
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0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, /* 4x */
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0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 0, 0, 0, /* 5x */
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0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 0, /* 6x */
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0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, /* 7x */
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0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 0, /* 8x */
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0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 0, 1, 0, /* 9x */
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1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, /* Ax */
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* Bx */
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0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, /* Cx */
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0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, /* Dx */
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0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, /* Ex */
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 0, /* Fx */
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};
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#define IdChar(C) (((c=C)>=0x42 && sqlite3IsEbcdicIdChar[c-0x40]))
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#endif
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/* Make the IdChar function accessible from ctime.c */
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#ifndef SQLITE_OMIT_COMPILEOPTION_DIAGS
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int sqlite3IsIdChar(u8 c){ return IdChar(c); }
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#endif
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/*
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** Return the length (in bytes) of the token that begins at z[0].
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** Store the token type in *tokenType before returning.
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*/
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#ifdef MAXSCALE
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extern int maxscaleComment();
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int sqlite3GetToken(Parse* pParse, const unsigned char *z, int *tokenType){
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#else
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int sqlite3GetToken(const unsigned char *z, int *tokenType){
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#endif
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int i, c;
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switch( aiClass[*z] ){ /* Switch on the character-class of the first byte
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** of the token. See the comment on the CC_ defines
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** above. */
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case CC_SPACE: {
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testcase( z[0]==' ' );
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testcase( z[0]=='\t' );
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testcase( z[0]=='\n' );
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testcase( z[0]=='\f' );
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testcase( z[0]=='\r' );
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for(i=1; sqlite3Isspace(z[i]); i++){}
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*tokenType = TK_SPACE;
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return i;
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}
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case CC_MINUS: {
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if( z[1]=='-' ){
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#ifdef MAXSCALE
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maxscaleComment();
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#endif
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for(i=2; (c=z[i])!=0 && c!='\n'; i++){}
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*tokenType = TK_SPACE; /* IMP: R-22934-25134 */
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return i;
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}
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*tokenType = TK_MINUS;
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return 1;
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}
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case CC_LP: {
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*tokenType = TK_LP;
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return 1;
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}
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case CC_RP: {
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*tokenType = TK_RP;
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return 1;
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}
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case CC_SEMI: {
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*tokenType = TK_SEMI;
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return 1;
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}
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case CC_PLUS: {
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*tokenType = TK_PLUS;
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return 1;
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}
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case CC_STAR: {
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*tokenType = TK_STAR;
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return 1;
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}
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case CC_SLASH: {
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if( z[1]!='*' || z[2]==0 ){
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*tokenType = TK_SLASH;
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return 1;
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}
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#ifdef MAXSCALE
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if ( z[2] == '!' ){
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// MySQL-specific code
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for (i=3, c=z[2]; (c!='*' || z[i]!='/') && (c=z[i])!=0; i++){}
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if (c=='*' && z[i]=='/'){
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char* znc = (char*) z;
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znc[0]=znc[1]=znc[2]=znc[i-1]=znc[i]=' '; // Remove comment chars, i.e. "/*!" and "*/".
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for (i=3; sqlite3Isdigit(z[i]); ++i){} // Jump over the MySQL version number.
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for (; sqlite3Isspace(z[i]); ++i){} // Jump over any space.
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}
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} else {
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for(i=3, c=z[2]; (c!='*' || z[i]!='/') && (c=z[i])!=0; i++){}
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if( c ) i++;
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}
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#else
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for(i=3, c=z[2]; (c!='*' || z[i]!='/') && (c=z[i])!=0; i++){}
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if( c ) i++;
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#endif
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*tokenType = TK_SPACE; /* IMP: R-22934-25134 */
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return i;
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}
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case CC_PERCENT: {
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*tokenType = TK_REM;
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return 1;
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}
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case CC_EQ: {
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*tokenType = TK_EQ;
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return 1 + (z[1]=='=');
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}
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case CC_LT: {
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if( (c=z[1])=='=' ){
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#ifdef MAXSCALE
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if ( z[2]=='>' ){
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// "<=>"
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*tokenType = TK_EQ;
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return 3;
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}
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#endif
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*tokenType = TK_LE;
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return 2;
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}else if( c=='>' ){
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*tokenType = TK_NE;
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return 2;
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}else if( c=='<' ){
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*tokenType = TK_LSHIFT;
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return 2;
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}else{
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*tokenType = TK_LT;
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return 1;
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}
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}
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case CC_GT: {
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if( (c=z[1])=='=' ){
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*tokenType = TK_GE;
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return 2;
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}else if( c=='>' ){
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*tokenType = TK_RSHIFT;
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return 2;
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}else{
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*tokenType = TK_GT;
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return 1;
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}
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}
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case CC_BANG: {
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if( z[1]!='=' ){
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*tokenType = TK_ILLEGAL;
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return 2;
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}else{
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*tokenType = TK_NE;
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return 2;
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}
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}
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case CC_PIPE: {
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if( z[1]!='|' ){
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*tokenType = TK_BITOR;
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return 1;
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}else{
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*tokenType = TK_CONCAT;
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return 2;
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}
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}
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case CC_COMMA: {
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*tokenType = TK_COMMA;
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return 1;
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}
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case CC_AND: {
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*tokenType = TK_BITAND;
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return 1;
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}
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case CC_TILDA: {
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*tokenType = TK_BITNOT;
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return 1;
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}
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case CC_QUOTE: {
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int delim = z[0];
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testcase( delim=='`' );
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testcase( delim=='\'' );
|
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testcase( delim=='"' );
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for(i=1; (c=z[i])!=0; i++){
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if( c==delim ){
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if( z[i+1]==delim ){
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i++;
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}else{
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break;
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}
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#ifdef MAXSCALE
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}else if (c == '\\' ){
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if ( z[i+1] ){
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i++;
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}
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#endif
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}
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}
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#ifdef MAXSCALE
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if( c=='\'' || c=='"' ){
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#else
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if( c=='\'' ){
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#endif
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*tokenType = TK_STRING;
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return i+1;
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}else if( c!=0 ){
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*tokenType = TK_ID;
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return i+1;
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}else{
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*tokenType = TK_ILLEGAL;
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return i;
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}
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}
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case CC_DOT: {
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#ifndef SQLITE_OMIT_FLOATING_POINT
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if( !sqlite3Isdigit(z[1]) )
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#endif
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{
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*tokenType = TK_DOT;
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return 1;
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}
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#ifdef MAXSCALE
|
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/* Next char is a digit, we need to sniff further to find out whether it
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** is an identifer that starts with a digit.
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*/
|
|
int j=1;
|
|
int nondigitChars=0;
|
|
while ( IdChar(z[j]) ){
|
|
if ( !sqlite3Isdigit(z[j++]) ){
|
|
++nondigitChars;
|
|
}
|
|
}
|
|
if ( nondigitChars ){
|
|
// At least one char that is not a digit => an id (and not a float) coming.
|
|
*tokenType = TK_DOT;
|
|
return 1;
|
|
}
|
|
#endif
|
|
/* If the next character is a digit, this is a floating point
|
|
** number that begins with ".". Fall thru into the next case */
|
|
}
|
|
case CC_DIGIT: {
|
|
testcase( z[0]=='0' ); testcase( z[0]=='1' ); testcase( z[0]=='2' );
|
|
testcase( z[0]=='3' ); testcase( z[0]=='4' ); testcase( z[0]=='5' );
|
|
testcase( z[0]=='6' ); testcase( z[0]=='7' ); testcase( z[0]=='8' );
|
|
testcase( z[0]=='9' );
|
|
*tokenType = TK_INTEGER;
|
|
#ifndef SQLITE_OMIT_HEX_INTEGER
|
|
if( z[0]=='0' && (z[1]=='x' || z[1]=='X') && sqlite3Isxdigit(z[2]) ){
|
|
for(i=3; sqlite3Isxdigit(z[i]); i++){}
|
|
return i;
|
|
}
|
|
#endif
|
|
for(i=0; sqlite3Isdigit(z[i]); i++){}
|
|
#ifndef SQLITE_OMIT_FLOATING_POINT
|
|
if( z[i]=='.' ){
|
|
i++;
|
|
while( sqlite3Isdigit(z[i]) ){ i++; }
|
|
*tokenType = TK_FLOAT;
|
|
}
|
|
if( (z[i]=='e' || z[i]=='E') &&
|
|
( sqlite3Isdigit(z[i+1])
|
|
|| ((z[i+1]=='+' || z[i+1]=='-') && sqlite3Isdigit(z[i+2]))
|
|
)
|
|
){
|
|
i += 2;
|
|
while( sqlite3Isdigit(z[i]) ){ i++; }
|
|
*tokenType = TK_FLOAT;
|
|
}
|
|
#endif
|
|
while( IdChar(z[i]) ){
|
|
#ifdef MAXSCALE
|
|
*tokenType = TK_ID;
|
|
#else
|
|
*tokenType = TK_ILLEGAL;
|
|
#endif
|
|
i++;
|
|
}
|
|
return i;
|
|
}
|
|
case CC_QUOTE2: {
|
|
for(i=1, c=z[0]; c!=']' && (c=z[i])!=0; i++){}
|
|
*tokenType = c==']' ? TK_ID : TK_ILLEGAL;
|
|
return i;
|
|
}
|
|
case CC_VARNUM: {
|
|
*tokenType = TK_VARIABLE;
|
|
for(i=1; sqlite3Isdigit(z[i]); i++){}
|
|
return i;
|
|
}
|
|
case CC_DOLLAR:
|
|
case CC_VARALPHA: {
|
|
int n = 0;
|
|
testcase( z[0]=='$' ); testcase( z[0]=='@' );
|
|
testcase( z[0]==':' ); testcase( z[0]=='#' );
|
|
#ifdef MAXSCALE
|
|
if (z[0]=='#') {
|
|
if (maxscaleComment()) {
|
|
for(i=1; (c=z[i])!=0 && c!='\n'; i++){}
|
|
*tokenType = TK_SPACE;
|
|
return i;
|
|
}
|
|
}
|
|
if (z[0]==':' && z[1]=='=') {
|
|
*tokenType = TK_EQ;
|
|
return 2;
|
|
}
|
|
#endif
|
|
*tokenType = TK_VARIABLE;
|
|
for(i=1; (c=z[i])!=0; i++){
|
|
#ifdef MAXSCALE
|
|
if ( (i == 1) && (z[0] == '@') && (c == '@') ) {
|
|
// If the first char is '@' then if the second char is a '@'
|
|
// it is a system variable (@@xyz).
|
|
continue;
|
|
}else if( IdChar(c) ){
|
|
#else
|
|
if( IdChar(c) ){
|
|
#endif
|
|
n++;
|
|
#ifndef SQLITE_OMIT_TCL_VARIABLE
|
|
}else if( c=='(' && n>0 ){
|
|
do{
|
|
i++;
|
|
}while( (c=z[i])!=0 && !sqlite3Isspace(c) && c!=')' );
|
|
if( c==')' ){
|
|
i++;
|
|
}else{
|
|
*tokenType = TK_ILLEGAL;
|
|
}
|
|
break;
|
|
}else if( c==':' && z[i+1]==':' ){
|
|
i++;
|
|
#endif
|
|
#ifdef MAXSCALE
|
|
}else if ( c=='\'' || c=='"' || c=='`' ){
|
|
int q=c;
|
|
++i;
|
|
while ( IdChar(z[i]) ) {
|
|
++i;
|
|
++n;
|
|
}
|
|
if ( z[i]==q )
|
|
{
|
|
++i;
|
|
break;
|
|
}
|
|
#endif
|
|
}else{
|
|
break;
|
|
}
|
|
}
|
|
if( n==0 ) *tokenType = TK_ILLEGAL;
|
|
return i;
|
|
}
|
|
case CC_KYWD: {
|
|
#ifdef MAXSCALE
|
|
// This is for bit fields, e.g. b'10110111'.
|
|
if ( z[0]=='b' || z[0]=='B' ) {
|
|
if ( z[1]=='\'' ){
|
|
// We return it as an integer. We are not interested in the value
|
|
*tokenType = TK_INTEGER;
|
|
for(i=2; (z[i]=='0'||z[i]=='1'); i++){}
|
|
if ( z[i]!='\'' ){
|
|
*tokenType = TK_ILLEGAL;
|
|
while ( z[i] && z[i]!='\'' ){ i++; }
|
|
}
|
|
if ( z[i] ) i++;
|
|
return i;
|
|
}
|
|
}
|
|
/* Not a bit field. It may be a keyword so we flow through */
|
|
#endif
|
|
for(i=1; aiClass[z[i]]<=CC_KYWD; i++){}
|
|
if( IdChar(z[i]) ){
|
|
/* This token started out using characters that can appear in keywords,
|
|
** but z[i] is a character not allowed within keywords, so this must
|
|
** be an identifier instead */
|
|
i++;
|
|
break;
|
|
}
|
|
*tokenType = TK_ID;
|
|
#ifdef MAXSCALE
|
|
i = keywordCode((char*)z, i, tokenType);
|
|
if (*tokenType != TK_ID)
|
|
{
|
|
if (pParse) {
|
|
if (z != (const unsigned char *)pParse->zTail) {
|
|
const char *p = (const char*)z - 1;
|
|
while ((p != pParse->zTail) && sqlite3Isspace(*p)) {
|
|
--p;
|
|
}
|
|
|
|
if (*p == '.') {
|
|
/* If the last character before the keyword is '.' then
|
|
** we assume this token is the second part of a qualified
|
|
** name, e.g. "tbl1.index" in which case we return the
|
|
** keyword as an id.
|
|
*/
|
|
*tokenType = TK_ID;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (*tokenType != TK_ID) {
|
|
extern int maxscaleKeyword(int);
|
|
extern int maxscaleTranslateKeyword(int);
|
|
|
|
*tokenType = maxscaleTranslateKeyword(*tokenType);
|
|
|
|
if (*tokenType != TK_ID) {
|
|
if (maxscaleKeyword(*tokenType) != 0)
|
|
{
|
|
/* Consume the entire string. */
|
|
while ( z[i] ) {
|
|
++i;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return i;
|
|
#else
|
|
return keywordCode((char*)z, i, tokenType);
|
|
#endif
|
|
}
|
|
#ifndef SQLITE_OMIT_BLOB_LITERAL
|
|
case CC_X: {
|
|
testcase( z[0]=='x' ); testcase( z[0]=='X' );
|
|
if( z[1]=='\'' ){
|
|
*tokenType = TK_BLOB;
|
|
for(i=2; sqlite3Isxdigit(z[i]); i++){}
|
|
if( z[i]!='\'' || i%2 ){
|
|
*tokenType = TK_ILLEGAL;
|
|
while( z[i] && z[i]!='\'' ){ i++; }
|
|
}
|
|
if( z[i] ) i++;
|
|
return i;
|
|
}
|
|
/* If it is not a BLOB literal, then it must be an ID, since no
|
|
** SQL keywords start with the letter 'x'. Fall through */
|
|
}
|
|
#endif
|
|
case CC_ID: {
|
|
i = 1;
|
|
break;
|
|
}
|
|
default: {
|
|
*tokenType = TK_ILLEGAL;
|
|
return 1;
|
|
}
|
|
}
|
|
while( IdChar(z[i]) ){ i++; }
|
|
*tokenType = TK_ID;
|
|
return i;
|
|
}
|
|
|
|
/*
|
|
** Run the parser on the given SQL string. The parser structure is
|
|
** passed in. An SQLITE_ status code is returned. If an error occurs
|
|
** then an and attempt is made to write an error message into
|
|
** memory obtained from sqlite3_malloc() and to make *pzErrMsg point to that
|
|
** error message.
|
|
*/
|
|
int sqlite3RunParser(Parse *pParse, const char *zSql, char **pzErrMsg){
|
|
int nErr = 0; /* Number of errors encountered */
|
|
int i; /* Loop counter */
|
|
void *pEngine; /* The LEMON-generated LALR(1) parser */
|
|
int tokenType; /* type of the next token */
|
|
int lastTokenParsed = -1; /* type of the previous token */
|
|
sqlite3 *db = pParse->db; /* The database connection */
|
|
int mxSqlLen; /* Max length of an SQL string */
|
|
|
|
assert( zSql!=0 );
|
|
mxSqlLen = db->aLimit[SQLITE_LIMIT_SQL_LENGTH];
|
|
if( db->nVdbeActive==0 ){
|
|
db->u1.isInterrupted = 0;
|
|
}
|
|
pParse->rc = SQLITE_OK;
|
|
pParse->zTail = zSql;
|
|
i = 0;
|
|
assert( pzErrMsg!=0 );
|
|
/* sqlite3ParserTrace(stdout, "parser: "); */
|
|
pEngine = sqlite3ParserAlloc(sqlite3Malloc);
|
|
if( pEngine==0 ){
|
|
sqlite3OomFault(db);
|
|
return SQLITE_NOMEM;
|
|
}
|
|
assert( pParse->pNewTable==0 );
|
|
assert( pParse->pNewTrigger==0 );
|
|
assert( pParse->nVar==0 );
|
|
assert( pParse->nzVar==0 );
|
|
assert( pParse->azVar==0 );
|
|
while( zSql[i]!=0 ){
|
|
assert( i>=0 );
|
|
pParse->sLastToken.z = &zSql[i];
|
|
#ifdef MAXSCALE
|
|
pParse->sLastToken.n = sqlite3GetToken(pParse,(unsigned char*)&zSql[i],&tokenType);
|
|
#else
|
|
pParse->sLastToken.n = sqlite3GetToken((unsigned char*)&zSql[i],&tokenType);
|
|
#endif
|
|
i += pParse->sLastToken.n;
|
|
if( i>mxSqlLen ){
|
|
pParse->rc = SQLITE_TOOBIG;
|
|
break;
|
|
}
|
|
if( tokenType>=TK_SPACE ){
|
|
assert( tokenType==TK_SPACE || tokenType==TK_ILLEGAL );
|
|
if( db->u1.isInterrupted ){
|
|
pParse->rc = SQLITE_INTERRUPT;
|
|
break;
|
|
}
|
|
if( tokenType==TK_ILLEGAL ){
|
|
sqlite3ErrorMsg(pParse, "unrecognized token: \"%T\"",
|
|
&pParse->sLastToken);
|
|
break;
|
|
}
|
|
}else{
|
|
if( tokenType==TK_SEMI ) pParse->zTail = &zSql[i];
|
|
sqlite3Parser(pEngine, tokenType, pParse->sLastToken, pParse);
|
|
lastTokenParsed = tokenType;
|
|
if( pParse->rc!=SQLITE_OK || db->mallocFailed ) break;
|
|
}
|
|
}
|
|
assert( nErr==0 );
|
|
if( pParse->rc==SQLITE_OK && db->mallocFailed==0 ){
|
|
assert( zSql[i]==0 );
|
|
if( lastTokenParsed!=TK_SEMI ){
|
|
sqlite3Parser(pEngine, TK_SEMI, pParse->sLastToken, pParse);
|
|
pParse->zTail = &zSql[i];
|
|
}
|
|
if( pParse->rc==SQLITE_OK && db->mallocFailed==0 ){
|
|
sqlite3Parser(pEngine, 0, pParse->sLastToken, pParse);
|
|
}
|
|
}
|
|
#ifdef YYTRACKMAXSTACKDEPTH
|
|
sqlite3_mutex_enter(sqlite3MallocMutex());
|
|
sqlite3StatusHighwater(SQLITE_STATUS_PARSER_STACK,
|
|
sqlite3ParserStackPeak(pEngine)
|
|
);
|
|
sqlite3_mutex_leave(sqlite3MallocMutex());
|
|
#endif /* YYDEBUG */
|
|
sqlite3ParserFree(pEngine, sqlite3_free);
|
|
if( db->mallocFailed ){
|
|
pParse->rc = SQLITE_NOMEM;
|
|
}
|
|
if( pParse->rc!=SQLITE_OK && pParse->rc!=SQLITE_DONE && pParse->zErrMsg==0 ){
|
|
pParse->zErrMsg = sqlite3MPrintf(db, "%s", sqlite3ErrStr(pParse->rc));
|
|
}
|
|
assert( pzErrMsg!=0 );
|
|
if( pParse->zErrMsg ){
|
|
*pzErrMsg = pParse->zErrMsg;
|
|
sqlite3_log(pParse->rc, "%s", *pzErrMsg);
|
|
pParse->zErrMsg = 0;
|
|
nErr++;
|
|
}
|
|
if( pParse->pVdbe && pParse->nErr>0 && pParse->nested==0 ){
|
|
sqlite3VdbeDelete(pParse->pVdbe);
|
|
pParse->pVdbe = 0;
|
|
}
|
|
#ifndef SQLITE_OMIT_SHARED_CACHE
|
|
if( pParse->nested==0 ){
|
|
sqlite3DbFree(db, pParse->aTableLock);
|
|
pParse->aTableLock = 0;
|
|
pParse->nTableLock = 0;
|
|
}
|
|
#endif
|
|
#ifndef SQLITE_OMIT_VIRTUALTABLE
|
|
sqlite3_free(pParse->apVtabLock);
|
|
#endif
|
|
|
|
if( !IN_DECLARE_VTAB ){
|
|
/* If the pParse->declareVtab flag is set, do not delete any table
|
|
** structure built up in pParse->pNewTable. The calling code (see vtab.c)
|
|
** will take responsibility for freeing the Table structure.
|
|
*/
|
|
sqlite3DeleteTable(db, pParse->pNewTable);
|
|
}
|
|
|
|
sqlite3WithDelete(db, pParse->pWithToFree);
|
|
sqlite3DeleteTrigger(db, pParse->pNewTrigger);
|
|
for(i=pParse->nzVar-1; i>=0; i--) sqlite3DbFree(db, pParse->azVar[i]);
|
|
sqlite3DbFree(db, pParse->azVar);
|
|
while( pParse->pAinc ){
|
|
AutoincInfo *p = pParse->pAinc;
|
|
pParse->pAinc = p->pNext;
|
|
sqlite3DbFree(db, p);
|
|
}
|
|
while( pParse->pZombieTab ){
|
|
Table *p = pParse->pZombieTab;
|
|
pParse->pZombieTab = p->pNextZombie;
|
|
sqlite3DeleteTable(db, p);
|
|
}
|
|
assert( nErr==0 || pParse->rc!=SQLITE_OK );
|
|
return nErr;
|
|
}
|