1 /* 2 ** 2001 September 15 3 ** 4 ** The author disclaims copyright to this source code. In place of 5 ** a legal notice, here is a blessing: 6 ** 7 ** May you do good and not evil. 8 ** May you find forgiveness for yourself and forgive others. 9 ** May you share freely, never taking more than you give. 10 ** 11 ************************************************************************* 12 ** An tokenizer for SQL 13 ** 14 ** This file contains C code that splits an SQL input string up into 15 ** individual tokens and sends those tokens one-by-one over to the 16 ** parser for analysis. 17 */ 18 #include "sqliteInt.h" 19 #include <stdlib.h> 20 21 /* Character classes for tokenizing 22 ** 23 ** In the sqlite3GetToken() function, a switch() on aiClass[c] is implemented 24 ** using a lookup table, whereas a switch() directly on c uses a binary search. 25 ** The lookup table is much faster. To maximize speed, and to ensure that 26 ** a lookup table is used, all of the classes need to be small integers and 27 ** all of them need to be used within the switch. 28 */ 29 #define CC_X 0 /* The letter 'x', or start of BLOB literal */ 30 #define CC_KYWD 1 /* Alphabetics or '_'. Usable in a keyword */ 31 #define CC_ID 2 /* unicode characters usable in IDs */ 32 #define CC_DIGIT 3 /* Digits */ 33 #define CC_DOLLAR 4 /* '$' */ 34 #define CC_VARALPHA 5 /* '@', '#', ':'. Alphabetic SQL variables */ 35 #define CC_VARNUM 6 /* '?'. Numeric SQL variables */ 36 #define CC_SPACE 7 /* Space characters */ 37 #define CC_QUOTE 8 /* '"', '\'', or '`'. String literals, quoted ids */ 38 #define CC_QUOTE2 9 /* '['. [...] style quoted ids */ 39 #define CC_PIPE 10 /* '|'. Bitwise OR or concatenate */ 40 #define CC_MINUS 11 /* '-'. Minus or SQL-style comment */ 41 #define CC_LT 12 /* '<'. Part of < or <= or <> */ 42 #define CC_GT 13 /* '>'. Part of > or >= */ 43 #define CC_EQ 14 /* '='. Part of = or == */ 44 #define CC_BANG 15 /* '!'. Part of != */ 45 #define CC_SLASH 16 /* '/'. / or c-style comment */ 46 #define CC_LP 17 /* '(' */ 47 #define CC_RP 18 /* ')' */ 48 #define CC_SEMI 19 /* ';' */ 49 #define CC_PLUS 20 /* '+' */ 50 #define CC_STAR 21 /* '*' */ 51 #define CC_PERCENT 22 /* '%' */ 52 #define CC_COMMA 23 /* ',' */ 53 #define CC_AND 24 /* '&' */ 54 #define CC_TILDA 25 /* '~' */ 55 #define CC_DOT 26 /* '.' */ 56 #define CC_ILLEGAL 27 /* Illegal character */ 57 58 static const unsigned char aiClass[] = { 59 #ifdef SQLITE_ASCII 60 /* x0 x1 x2 x3 x4 x5 x6 x7 x8 x9 xa xb xc xd xe xf */ 61 /* 0x */ 27, 27, 27, 27, 27, 27, 27, 27, 27, 7, 7, 27, 7, 7, 27, 27, 62 /* 1x */ 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 63 /* 2x */ 7, 15, 8, 5, 4, 22, 24, 8, 17, 18, 21, 20, 23, 11, 26, 16, 64 /* 3x */ 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 5, 19, 12, 14, 13, 6, 65 /* 4x */ 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 66 /* 5x */ 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 9, 27, 27, 27, 1, 67 /* 6x */ 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 68 /* 7x */ 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 27, 10, 27, 25, 27, 69 /* 8x */ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 70 /* 9x */ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 71 /* Ax */ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 72 /* Bx */ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 73 /* Cx */ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 74 /* Dx */ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 75 /* Ex */ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 76 /* Fx */ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2 77 #endif 78 #ifdef SQLITE_EBCDIC 79 /* x0 x1 x2 x3 x4 x5 x6 x7 x8 x9 xa xb xc xd xe xf */ 80 /* 0x */ 27, 27, 27, 27, 27, 7, 27, 27, 27, 27, 27, 27, 7, 7, 27, 27, 81 /* 1x */ 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 82 /* 2x */ 27, 27, 27, 27, 27, 7, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 83 /* 3x */ 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 84 /* 4x */ 7, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 12, 17, 20, 10, 85 /* 5x */ 24, 27, 27, 27, 27, 27, 27, 27, 27, 27, 15, 4, 21, 18, 19, 27, 86 /* 6x */ 11, 16, 27, 27, 27, 27, 27, 27, 27, 27, 27, 23, 22, 1, 13, 7, 87 /* 7x */ 27, 27, 27, 27, 27, 27, 27, 27, 27, 8, 5, 5, 5, 8, 14, 8, 88 /* 8x */ 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 27, 27, 27, 27, 27, 27, 89 /* 9x */ 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 27, 27, 27, 27, 27, 27, 90 /* 9x */ 25, 1, 1, 1, 1, 1, 1, 0, 1, 1, 27, 27, 27, 27, 27, 27, 91 /* Bx */ 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 9, 27, 27, 27, 27, 27, 92 /* Cx */ 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 27, 27, 27, 27, 27, 27, 93 /* Dx */ 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 27, 27, 27, 27, 27, 27, 94 /* Ex */ 27, 27, 1, 1, 1, 1, 1, 0, 1, 1, 27, 27, 27, 27, 27, 27, 95 /* Fx */ 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 27, 27, 27, 27, 27, 27, 96 #endif 97 }; 98 99 /* 100 ** The charMap() macro maps alphabetic characters (only) into their 101 ** lower-case ASCII equivalent. On ASCII machines, this is just 102 ** an upper-to-lower case map. On EBCDIC machines we also need 103 ** to adjust the encoding. The mapping is only valid for alphabetics 104 ** which are the only characters for which this feature is used. 105 ** 106 ** Used by keywordhash.h 107 */ 108 #ifdef SQLITE_ASCII 109 # define charMap(X) sqlite3UpperToLower[(unsigned char)X] 110 #endif 111 #ifdef SQLITE_EBCDIC 112 # define charMap(X) ebcdicToAscii[(unsigned char)X] 113 const unsigned char ebcdicToAscii[] = { 114 /* 0 1 2 3 4 5 6 7 8 9 A B C D E F */ 115 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x */ 116 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 1x */ 117 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 2x */ 118 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 3x */ 119 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 4x */ 120 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 5x */ 121 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 95, 0, 0, /* 6x */ 122 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 7x */ 123 0, 97, 98, 99,100,101,102,103,104,105, 0, 0, 0, 0, 0, 0, /* 8x */ 124 0,106,107,108,109,110,111,112,113,114, 0, 0, 0, 0, 0, 0, /* 9x */ 125 0, 0,115,116,117,118,119,120,121,122, 0, 0, 0, 0, 0, 0, /* Ax */ 126 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* Bx */ 127 0, 97, 98, 99,100,101,102,103,104,105, 0, 0, 0, 0, 0, 0, /* Cx */ 128 0,106,107,108,109,110,111,112,113,114, 0, 0, 0, 0, 0, 0, /* Dx */ 129 0, 0,115,116,117,118,119,120,121,122, 0, 0, 0, 0, 0, 0, /* Ex */ 130 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* Fx */ 131 }; 132 #endif 133 134 /* 135 ** The sqlite3KeywordCode function looks up an identifier to determine if 136 ** it is a keyword. If it is a keyword, the token code of that keyword is 137 ** returned. If the input is not a keyword, TK_ID is returned. 138 ** 139 ** The implementation of this routine was generated by a program, 140 ** mkkeywordhash.c, located in the tool subdirectory of the distribution. 141 ** The output of the mkkeywordhash.c program is written into a file 142 ** named keywordhash.h and then included into this source file by 143 ** the #include below. 144 */ 145 #include "keywordhash.h" 146 147 148 /* 149 ** If X is a character that can be used in an identifier then 150 ** IdChar(X) will be true. Otherwise it is false. 151 ** 152 ** For ASCII, any character with the high-order bit set is 153 ** allowed in an identifier. For 7-bit characters, 154 ** sqlite3IsIdChar[X] must be 1. 155 ** 156 ** For EBCDIC, the rules are more complex but have the same 157 ** end result. 158 ** 159 ** Ticket #1066. the SQL standard does not allow '$' in the 160 ** middle of identifiers. But many SQL implementations do. 161 ** SQLite will allow '$' in identifiers for compatibility. 162 ** But the feature is undocumented. 163 */ 164 #ifdef SQLITE_ASCII 165 #define IdChar(C) ((sqlite3CtypeMap[(unsigned char)C]&0x46)!=0) 166 #endif 167 #ifdef SQLITE_EBCDIC 168 const char sqlite3IsEbcdicIdChar[] = { 169 /* x0 x1 x2 x3 x4 x5 x6 x7 x8 x9 xA xB xC xD xE xF */ 170 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, /* 4x */ 171 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 0, 0, 0, /* 5x */ 172 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 0, /* 6x */ 173 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, /* 7x */ 174 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 0, /* 8x */ 175 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 0, 1, 0, /* 9x */ 176 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, /* Ax */ 177 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* Bx */ 178 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, /* Cx */ 179 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, /* Dx */ 180 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, /* Ex */ 181 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 0, /* Fx */ 182 }; 183 #define IdChar(C) (((c=C)>=0x42 && sqlite3IsEbcdicIdChar[c-0x40])) 184 #endif 185 186 /* Make the IdChar function accessible from ctime.c */ 187 #ifndef SQLITE_OMIT_COMPILEOPTION_DIAGS 188 int sqlite3IsIdChar(u8 c){ return IdChar(c); } 189 #endif 190 191 192 /* 193 ** Return the length (in bytes) of the token that begins at z[0]. 194 ** Store the token type in *tokenType before returning. 195 */ 196 int sqlite3GetToken(const unsigned char *z, int *tokenType){ 197 int i, c; 198 switch( aiClass[*z] ){ /* Switch on the character-class of the first byte 199 ** of the token. See the comment on the CC_ defines 200 ** above. */ 201 case CC_SPACE: { 202 testcase( z[0]==' ' ); 203 testcase( z[0]=='\t' ); 204 testcase( z[0]=='\n' ); 205 testcase( z[0]=='\f' ); 206 testcase( z[0]=='\r' ); 207 for(i=1; sqlite3Isspace(z[i]); i++){} 208 *tokenType = TK_SPACE; 209 return i; 210 } 211 case CC_MINUS: { 212 if( z[1]=='-' ){ 213 for(i=2; (c=z[i])!=0 && c!='\n'; i++){} 214 *tokenType = TK_SPACE; /* IMP: R-22934-25134 */ 215 return i; 216 } 217 *tokenType = TK_MINUS; 218 return 1; 219 } 220 case CC_LP: { 221 *tokenType = TK_LP; 222 return 1; 223 } 224 case CC_RP: { 225 *tokenType = TK_RP; 226 return 1; 227 } 228 case CC_SEMI: { 229 *tokenType = TK_SEMI; 230 return 1; 231 } 232 case CC_PLUS: { 233 *tokenType = TK_PLUS; 234 return 1; 235 } 236 case CC_STAR: { 237 *tokenType = TK_STAR; 238 return 1; 239 } 240 case CC_SLASH: { 241 if( z[1]!='*' || z[2]==0 ){ 242 *tokenType = TK_SLASH; 243 return 1; 244 } 245 for(i=3, c=z[2]; (c!='*' || z[i]!='/') && (c=z[i])!=0; i++){} 246 if( c ) i++; 247 *tokenType = TK_SPACE; /* IMP: R-22934-25134 */ 248 return i; 249 } 250 case CC_PERCENT: { 251 *tokenType = TK_REM; 252 return 1; 253 } 254 case CC_EQ: { 255 *tokenType = TK_EQ; 256 return 1 + (z[1]=='='); 257 } 258 case CC_LT: { 259 if( (c=z[1])=='=' ){ 260 *tokenType = TK_LE; 261 return 2; 262 }else if( c=='>' ){ 263 *tokenType = TK_NE; 264 return 2; 265 }else if( c=='<' ){ 266 *tokenType = TK_LSHIFT; 267 return 2; 268 }else{ 269 *tokenType = TK_LT; 270 return 1; 271 } 272 } 273 case CC_GT: { 274 if( (c=z[1])=='=' ){ 275 *tokenType = TK_GE; 276 return 2; 277 }else if( c=='>' ){ 278 *tokenType = TK_RSHIFT; 279 return 2; 280 }else{ 281 *tokenType = TK_GT; 282 return 1; 283 } 284 } 285 case CC_BANG: { 286 if( z[1]!='=' ){ 287 *tokenType = TK_ILLEGAL; 288 return 1; 289 }else{ 290 *tokenType = TK_NE; 291 return 2; 292 } 293 } 294 case CC_PIPE: { 295 if( z[1]!='|' ){ 296 *tokenType = TK_BITOR; 297 return 1; 298 }else{ 299 *tokenType = TK_CONCAT; 300 return 2; 301 } 302 } 303 case CC_COMMA: { 304 *tokenType = TK_COMMA; 305 return 1; 306 } 307 case CC_AND: { 308 *tokenType = TK_BITAND; 309 return 1; 310 } 311 case CC_TILDA: { 312 *tokenType = TK_BITNOT; 313 return 1; 314 } 315 case CC_QUOTE: { 316 int delim = z[0]; 317 testcase( delim=='`' ); 318 testcase( delim=='\'' ); 319 testcase( delim=='"' ); 320 for(i=1; (c=z[i])!=0; i++){ 321 if( c==delim ){ 322 if( z[i+1]==delim ){ 323 i++; 324 }else{ 325 break; 326 } 327 } 328 } 329 if( c=='\'' ){ 330 *tokenType = TK_STRING; 331 return i+1; 332 }else if( c!=0 ){ 333 *tokenType = TK_ID; 334 return i+1; 335 }else{ 336 *tokenType = TK_ILLEGAL; 337 return i; 338 } 339 } 340 case CC_DOT: { 341 #ifndef SQLITE_OMIT_FLOATING_POINT 342 if( !sqlite3Isdigit(z[1]) ) 343 #endif 344 { 345 *tokenType = TK_DOT; 346 return 1; 347 } 348 /* If the next character is a digit, this is a floating point 349 ** number that begins with ".". Fall thru into the next case */ 350 } 351 case CC_DIGIT: { 352 testcase( z[0]=='0' ); testcase( z[0]=='1' ); testcase( z[0]=='2' ); 353 testcase( z[0]=='3' ); testcase( z[0]=='4' ); testcase( z[0]=='5' ); 354 testcase( z[0]=='6' ); testcase( z[0]=='7' ); testcase( z[0]=='8' ); 355 testcase( z[0]=='9' ); 356 *tokenType = TK_INTEGER; 357 #ifndef SQLITE_OMIT_HEX_INTEGER 358 if( z[0]=='0' && (z[1]=='x' || z[1]=='X') && sqlite3Isxdigit(z[2]) ){ 359 for(i=3; sqlite3Isxdigit(z[i]); i++){} 360 return i; 361 } 362 #endif 363 for(i=0; sqlite3Isdigit(z[i]); i++){} 364 #ifndef SQLITE_OMIT_FLOATING_POINT 365 if( z[i]=='.' ){ 366 i++; 367 while( sqlite3Isdigit(z[i]) ){ i++; } 368 *tokenType = TK_FLOAT; 369 } 370 if( (z[i]=='e' || z[i]=='E') && 371 ( sqlite3Isdigit(z[i+1]) 372 || ((z[i+1]=='+' || z[i+1]=='-') && sqlite3Isdigit(z[i+2])) 373 ) 374 ){ 375 i += 2; 376 while( sqlite3Isdigit(z[i]) ){ i++; } 377 *tokenType = TK_FLOAT; 378 } 379 #endif 380 while( IdChar(z[i]) ){ 381 *tokenType = TK_ILLEGAL; 382 i++; 383 } 384 return i; 385 } 386 case CC_QUOTE2: { 387 for(i=1, c=z[0]; c!=']' && (c=z[i])!=0; i++){} 388 *tokenType = c==']' ? TK_ID : TK_ILLEGAL; 389 return i; 390 } 391 case CC_VARNUM: { 392 *tokenType = TK_VARIABLE; 393 for(i=1; sqlite3Isdigit(z[i]); i++){} 394 return i; 395 } 396 case CC_DOLLAR: 397 case CC_VARALPHA: { 398 int n = 0; 399 testcase( z[0]=='$' ); testcase( z[0]=='@' ); 400 testcase( z[0]==':' ); testcase( z[0]=='#' ); 401 *tokenType = TK_VARIABLE; 402 for(i=1; (c=z[i])!=0; i++){ 403 if( IdChar(c) ){ 404 n++; 405 #ifndef SQLITE_OMIT_TCL_VARIABLE 406 }else if( c=='(' && n>0 ){ 407 do{ 408 i++; 409 }while( (c=z[i])!=0 && !sqlite3Isspace(c) && c!=')' ); 410 if( c==')' ){ 411 i++; 412 }else{ 413 *tokenType = TK_ILLEGAL; 414 } 415 break; 416 }else if( c==':' && z[i+1]==':' ){ 417 i++; 418 #endif 419 }else{ 420 break; 421 } 422 } 423 if( n==0 ) *tokenType = TK_ILLEGAL; 424 return i; 425 } 426 case CC_KYWD: { 427 for(i=1; aiClass[z[i]]<=CC_KYWD; i++){} 428 if( IdChar(z[i]) ){ 429 /* This token started out using characters that can appear in keywords, 430 ** but z[i] is a character not allowed within keywords, so this must 431 ** be an identifier instead */ 432 i++; 433 break; 434 } 435 *tokenType = TK_ID; 436 return keywordCode((char*)z, i, tokenType); 437 } 438 case CC_X: { 439 #ifndef SQLITE_OMIT_BLOB_LITERAL 440 testcase( z[0]=='x' ); testcase( z[0]=='X' ); 441 if( z[1]=='\'' ){ 442 *tokenType = TK_BLOB; 443 for(i=2; sqlite3Isxdigit(z[i]); i++){} 444 if( z[i]!='\'' || i%2 ){ 445 *tokenType = TK_ILLEGAL; 446 while( z[i] && z[i]!='\'' ){ i++; } 447 } 448 if( z[i] ) i++; 449 return i; 450 } 451 #endif 452 /* If it is not a BLOB literal, then it must be an ID, since no 453 ** SQL keywords start with the letter 'x'. Fall through */ 454 } 455 case CC_ID: { 456 i = 1; 457 break; 458 } 459 default: { 460 *tokenType = TK_ILLEGAL; 461 return 1; 462 } 463 } 464 while( IdChar(z[i]) ){ i++; } 465 *tokenType = TK_ID; 466 return i; 467 } 468 469 /* 470 ** Run the parser on the given SQL string. The parser structure is 471 ** passed in. An SQLITE_ status code is returned. If an error occurs 472 ** then an and attempt is made to write an error message into 473 ** memory obtained from sqlite3_malloc() and to make *pzErrMsg point to that 474 ** error message. 475 */ 476 int sqlite3RunParser(Parse *pParse, const char *zSql, char **pzErrMsg){ 477 int nErr = 0; /* Number of errors encountered */ 478 int i; /* Loop counter */ 479 void *pEngine; /* The LEMON-generated LALR(1) parser */ 480 int tokenType; /* type of the next token */ 481 int lastTokenParsed = -1; /* type of the previous token */ 482 sqlite3 *db = pParse->db; /* The database connection */ 483 int mxSqlLen; /* Max length of an SQL string */ 484 485 assert( zSql!=0 ); 486 mxSqlLen = db->aLimit[SQLITE_LIMIT_SQL_LENGTH]; 487 if( db->nVdbeActive==0 ){ 488 db->u1.isInterrupted = 0; 489 } 490 pParse->rc = SQLITE_OK; 491 pParse->zTail = zSql; 492 i = 0; 493 assert( pzErrMsg!=0 ); 494 /* sqlite3ParserTrace(stdout, "parser: "); */ 495 pEngine = sqlite3ParserAlloc(sqlite3Malloc); 496 if( pEngine==0 ){ 497 sqlite3OomFault(db); 498 return SQLITE_NOMEM_BKPT; 499 } 500 assert( pParse->pNewTable==0 ); 501 assert( pParse->pNewTrigger==0 ); 502 assert( pParse->nVar==0 ); 503 assert( pParse->nzVar==0 ); 504 assert( pParse->azVar==0 ); 505 while( zSql[i]!=0 ){ 506 assert( i>=0 ); 507 pParse->sLastToken.z = &zSql[i]; 508 pParse->sLastToken.n = sqlite3GetToken((unsigned char*)&zSql[i],&tokenType); 509 i += pParse->sLastToken.n; 510 if( i>mxSqlLen ){ 511 pParse->rc = SQLITE_TOOBIG; 512 break; 513 } 514 if( tokenType>=TK_SPACE ){ 515 assert( tokenType==TK_SPACE || tokenType==TK_ILLEGAL ); 516 if( db->u1.isInterrupted ){ 517 pParse->rc = SQLITE_INTERRUPT; 518 break; 519 } 520 if( tokenType==TK_ILLEGAL ){ 521 sqlite3ErrorMsg(pParse, "unrecognized token: \"%T\"", 522 &pParse->sLastToken); 523 break; 524 } 525 }else{ 526 sqlite3Parser(pEngine, tokenType, pParse->sLastToken, pParse); 527 lastTokenParsed = tokenType; 528 if( pParse->rc!=SQLITE_OK || db->mallocFailed ) break; 529 } 530 } 531 assert( nErr==0 ); 532 pParse->zTail = &zSql[i]; 533 if( pParse->rc==SQLITE_OK && db->mallocFailed==0 ){ 534 assert( zSql[i]==0 ); 535 if( lastTokenParsed!=TK_SEMI ){ 536 sqlite3Parser(pEngine, TK_SEMI, pParse->sLastToken, pParse); 537 } 538 if( pParse->rc==SQLITE_OK && db->mallocFailed==0 ){ 539 sqlite3Parser(pEngine, 0, pParse->sLastToken, pParse); 540 } 541 } 542 #ifdef YYTRACKMAXSTACKDEPTH 543 sqlite3_mutex_enter(sqlite3MallocMutex()); 544 sqlite3StatusHighwater(SQLITE_STATUS_PARSER_STACK, 545 sqlite3ParserStackPeak(pEngine) 546 ); 547 sqlite3_mutex_leave(sqlite3MallocMutex()); 548 #endif /* YYDEBUG */ 549 sqlite3ParserFree(pEngine, sqlite3_free); 550 if( db->mallocFailed ){ 551 pParse->rc = SQLITE_NOMEM_BKPT; 552 } 553 if( pParse->rc!=SQLITE_OK && pParse->rc!=SQLITE_DONE && pParse->zErrMsg==0 ){ 554 pParse->zErrMsg = sqlite3MPrintf(db, "%s", sqlite3ErrStr(pParse->rc)); 555 } 556 assert( pzErrMsg!=0 ); 557 if( pParse->zErrMsg ){ 558 *pzErrMsg = pParse->zErrMsg; 559 sqlite3_log(pParse->rc, "%s", *pzErrMsg); 560 pParse->zErrMsg = 0; 561 nErr++; 562 } 563 if( pParse->pVdbe && pParse->nErr>0 && pParse->nested==0 ){ 564 sqlite3VdbeDelete(pParse->pVdbe); 565 pParse->pVdbe = 0; 566 } 567 #ifndef SQLITE_OMIT_SHARED_CACHE 568 if( pParse->nested==0 ){ 569 sqlite3DbFree(db, pParse->aTableLock); 570 pParse->aTableLock = 0; 571 pParse->nTableLock = 0; 572 } 573 #endif 574 #ifndef SQLITE_OMIT_VIRTUALTABLE 575 sqlite3_free(pParse->apVtabLock); 576 #endif 577 578 if( !IN_DECLARE_VTAB ){ 579 /* If the pParse->declareVtab flag is set, do not delete any table 580 ** structure built up in pParse->pNewTable. The calling code (see vtab.c) 581 ** will take responsibility for freeing the Table structure. 582 */ 583 sqlite3DeleteTable(db, pParse->pNewTable); 584 } 585 586 sqlite3WithDelete(db, pParse->pWithToFree); 587 sqlite3DeleteTrigger(db, pParse->pNewTrigger); 588 for(i=pParse->nzVar-1; i>=0; i--) sqlite3DbFree(db, pParse->azVar[i]); 589 sqlite3DbFree(db, pParse->azVar); 590 while( pParse->pAinc ){ 591 AutoincInfo *p = pParse->pAinc; 592 pParse->pAinc = p->pNext; 593 sqlite3DbFree(db, p); 594 } 595 while( pParse->pZombieTab ){ 596 Table *p = pParse->pZombieTab; 597 pParse->pZombieTab = p->pNextZombie; 598 sqlite3DeleteTable(db, p); 599 } 600 assert( nErr==0 || pParse->rc!=SQLITE_OK ); 601 return nErr; 602 } 603