diff options
Diffstat (limited to 'src/parse.y')
| -rw-r--r-- | src/parse.y | 1371 |
1 files changed, 1371 insertions, 0 deletions
diff --git a/src/parse.y b/src/parse.y new file mode 100644 index 0000000..92abd5c --- /dev/null +++ b/src/parse.y @@ -0,0 +1,1371 @@ +/* +** 2001 September 15 +** +** The author disclaims copyright to this source code. In place of +** a legal notice, here is a blessing: +** +** May you do good and not evil. +** May you find forgiveness for yourself and forgive others. +** May you share freely, never taking more than you give. +** +************************************************************************* +** This file contains SQLite's grammar for SQL. Process this file +** using the lemon parser generator to generate C code that runs +** the parser. Lemon will also generate a header file containing +** numeric codes for all of the tokens. +*/ + +// All token codes are small integers with #defines that begin with "TK_" +%token_prefix TK_ + +// The type of the data attached to each token is Token. This is also the +// default type for non-terminals. +// +%token_type {Token} +%default_type {Token} + +// The generated parser function takes a 4th argument as follows: +%extra_argument {Parse *pParse} + +// This code runs whenever there is a syntax error +// +%syntax_error { + UNUSED_PARAMETER(yymajor); /* Silence some compiler warnings */ + assert( TOKEN.z[0] ); /* The tokenizer always gives us a token */ + sqlite3ErrorMsg(pParse, "near \"%T\": syntax error", &TOKEN); + pParse->parseError = 1; +} +%stack_overflow { + UNUSED_PARAMETER(yypMinor); /* Silence some compiler warnings */ + sqlite3ErrorMsg(pParse, "parser stack overflow"); + pParse->parseError = 1; +} + +// The name of the generated procedure that implements the parser +// is as follows: +%name sqlite3Parser + +// The following text is included near the beginning of the C source +// code file that implements the parser. +// +%include { +#include "sqliteInt.h" + +/* +** Disable all error recovery processing in the parser push-down +** automaton. +*/ +#define YYNOERRORRECOVERY 1 + +/* +** Make yytestcase() the same as testcase() +*/ +#define yytestcase(X) testcase(X) + +/* +** An instance of this structure holds information about the +** LIMIT clause of a SELECT statement. +*/ +struct LimitVal { + Expr *pLimit; /* The LIMIT expression. NULL if there is no limit */ + Expr *pOffset; /* The OFFSET expression. NULL if there is none */ +}; + +/* +** An instance of this structure is used to store the LIKE, +** GLOB, NOT LIKE, and NOT GLOB operators. +*/ +struct LikeOp { + Token eOperator; /* "like" or "glob" or "regexp" */ + int not; /* True if the NOT keyword is present */ +}; + +/* +** An instance of the following structure describes the event of a +** TRIGGER. "a" is the event type, one of TK_UPDATE, TK_INSERT, +** TK_DELETE, or TK_INSTEAD. If the event is of the form +** +** UPDATE ON (a,b,c) +** +** Then the "b" IdList records the list "a,b,c". +*/ +struct TrigEvent { int a; IdList * b; }; + +/* +** An instance of this structure holds the ATTACH key and the key type. +*/ +struct AttachKey { int type; Token key; }; + +} // end %include + +// Input is a single SQL command +input ::= cmdlist. +cmdlist ::= cmdlist ecmd. +cmdlist ::= ecmd. +ecmd ::= SEMI. +ecmd ::= explain cmdx SEMI. +explain ::= . { sqlite3BeginParse(pParse, 0); } +%ifndef SQLITE_OMIT_EXPLAIN +explain ::= EXPLAIN. { sqlite3BeginParse(pParse, 1); } +explain ::= EXPLAIN QUERY PLAN. { sqlite3BeginParse(pParse, 2); } +%endif SQLITE_OMIT_EXPLAIN +cmdx ::= cmd. { sqlite3FinishCoding(pParse); } + +///////////////////// Begin and end transactions. //////////////////////////// +// + +cmd ::= BEGIN transtype(Y) trans_opt. {sqlite3BeginTransaction(pParse, Y);} +trans_opt ::= . +trans_opt ::= TRANSACTION. +trans_opt ::= TRANSACTION nm. +%type transtype {int} +transtype(A) ::= . {A = TK_DEFERRED;} +transtype(A) ::= DEFERRED(X). {A = @X;} +transtype(A) ::= IMMEDIATE(X). {A = @X;} +transtype(A) ::= EXCLUSIVE(X). {A = @X;} +cmd ::= COMMIT trans_opt. {sqlite3CommitTransaction(pParse);} +cmd ::= END trans_opt. {sqlite3CommitTransaction(pParse);} +cmd ::= ROLLBACK trans_opt. {sqlite3RollbackTransaction(pParse);} + +savepoint_opt ::= SAVEPOINT. +savepoint_opt ::= . +cmd ::= SAVEPOINT nm(X). { + sqlite3Savepoint(pParse, SAVEPOINT_BEGIN, &X); +} +cmd ::= RELEASE savepoint_opt nm(X). { + sqlite3Savepoint(pParse, SAVEPOINT_RELEASE, &X); +} +cmd ::= ROLLBACK trans_opt TO savepoint_opt nm(X). { + sqlite3Savepoint(pParse, SAVEPOINT_ROLLBACK, &X); +} + +///////////////////// The CREATE TABLE statement //////////////////////////// +// +cmd ::= create_table create_table_args. +create_table ::= createkw temp(T) TABLE ifnotexists(E) nm(Y) dbnm(Z). { + sqlite3StartTable(pParse,&Y,&Z,T,0,0,E); +} +createkw(A) ::= CREATE(X). { + pParse->db->lookaside.bEnabled = 0; + A = X; +} +%type ifnotexists {int} +ifnotexists(A) ::= . {A = 0;} +ifnotexists(A) ::= IF NOT EXISTS. {A = 1;} +%type temp {int} +%ifndef SQLITE_OMIT_TEMPDB +temp(A) ::= TEMP. {A = 1;} +%endif SQLITE_OMIT_TEMPDB +temp(A) ::= . {A = 0;} +create_table_args ::= LP columnlist conslist_opt(X) RP(Y). { + sqlite3EndTable(pParse,&X,&Y,0); +} +create_table_args ::= AS select(S). { + sqlite3EndTable(pParse,0,0,S); + sqlite3SelectDelete(pParse->db, S); +} +columnlist ::= columnlist COMMA column. +columnlist ::= column. + +// A "column" is a complete description of a single column in a +// CREATE TABLE statement. This includes the column name, its +// datatype, and other keywords such as PRIMARY KEY, UNIQUE, REFERENCES, +// NOT NULL and so forth. +// +column(A) ::= columnid(X) type carglist. { + A.z = X.z; + A.n = (int)(pParse->sLastToken.z-X.z) + pParse->sLastToken.n; +} +columnid(A) ::= nm(X). { + sqlite3AddColumn(pParse,&X); + A = X; +} + + +// An IDENTIFIER can be a generic identifier, or one of several +// keywords. Any non-standard keyword can also be an identifier. +// +%type id {Token} +id(A) ::= ID(X). {A = X;} +id(A) ::= INDEXED(X). {A = X;} + +// The following directive causes tokens ABORT, AFTER, ASC, etc. to +// fallback to ID if they will not parse as their original value. +// This obviates the need for the "id" nonterminal. +// +%fallback ID + ABORT ACTION AFTER ANALYZE ASC ATTACH BEFORE BEGIN BY CASCADE CAST COLUMNKW + CONFLICT DATABASE DEFERRED DESC DETACH EACH END EXCLUSIVE EXPLAIN FAIL FOR + IGNORE IMMEDIATE INITIALLY INSTEAD LIKE_KW MATCH NO PLAN + QUERY KEY OF OFFSET PRAGMA RAISE RELEASE REPLACE RESTRICT ROW ROLLBACK + SAVEPOINT TEMP TRIGGER VACUUM VIEW VIRTUAL +%ifdef SQLITE_OMIT_COMPOUND_SELECT + EXCEPT INTERSECT UNION +%endif SQLITE_OMIT_COMPOUND_SELECT + REINDEX RENAME CTIME_KW IF + . +%wildcard ANY. + +// Define operator precedence early so that this is the first occurance +// of the operator tokens in the grammer. Keeping the operators together +// causes them to be assigned integer values that are close together, +// which keeps parser tables smaller. +// +// The token values assigned to these symbols is determined by the order +// in which lemon first sees them. It must be the case that ISNULL/NOTNULL, +// NE/EQ, GT/LE, and GE/LT are separated by only a single value. See +// the sqlite3ExprIfFalse() routine for additional information on this +// constraint. +// +%left OR. +%left AND. +%right NOT. +%left IS MATCH LIKE_KW BETWEEN IN ISNULL NOTNULL NE EQ. +%left GT LE LT GE. +%right ESCAPE. +%left BITAND BITOR LSHIFT RSHIFT. +%left PLUS MINUS. +%left STAR SLASH REM. +%left CONCAT. +%left COLLATE. +%right BITNOT. + +// And "ids" is an identifer-or-string. +// +%type ids {Token} +ids(A) ::= ID|STRING(X). {A = X;} + +// The name of a column or table can be any of the following: +// +%type nm {Token} +nm(A) ::= id(X). {A = X;} +nm(A) ::= STRING(X). {A = X;} +nm(A) ::= JOIN_KW(X). {A = X;} + +// A typetoken is really one or more tokens that form a type name such +// as can be found after the column name in a CREATE TABLE statement. +// Multiple tokens are concatenated to form the value of the typetoken. +// +%type typetoken {Token} +type ::= . +type ::= typetoken(X). {sqlite3AddColumnType(pParse,&X);} +typetoken(A) ::= typename(X). {A = X;} +typetoken(A) ::= typename(X) LP signed RP(Y). { + A.z = X.z; + A.n = (int)(&Y.z[Y.n] - X.z); +} +typetoken(A) ::= typename(X) LP signed COMMA signed RP(Y). { + A.z = X.z; + A.n = (int)(&Y.z[Y.n] - X.z); +} +%type typename {Token} +typename(A) ::= ids(X). {A = X;} +typename(A) ::= typename(X) ids(Y). {A.z=X.z; A.n=Y.n+(int)(Y.z-X.z);} +signed ::= plus_num. +signed ::= minus_num. + +// "carglist" is a list of additional constraints that come after the +// column name and column type in a CREATE TABLE statement. +// +carglist ::= carglist carg. +carglist ::= . +carg ::= CONSTRAINT nm ccons. +carg ::= ccons. +ccons ::= DEFAULT term(X). {sqlite3AddDefaultValue(pParse,&X);} +ccons ::= DEFAULT LP expr(X) RP. {sqlite3AddDefaultValue(pParse,&X);} +ccons ::= DEFAULT PLUS term(X). {sqlite3AddDefaultValue(pParse,&X);} +ccons ::= DEFAULT MINUS(A) term(X). { + ExprSpan v; + v.pExpr = sqlite3PExpr(pParse, TK_UMINUS, X.pExpr, 0, 0); + v.zStart = A.z; + v.zEnd = X.zEnd; + sqlite3AddDefaultValue(pParse,&v); +} +ccons ::= DEFAULT id(X). { + ExprSpan v; + spanExpr(&v, pParse, TK_STRING, &X); + sqlite3AddDefaultValue(pParse,&v); +} + +// In addition to the type name, we also care about the primary key and +// UNIQUE constraints. +// +ccons ::= NULL onconf. +ccons ::= NOT NULL onconf(R). {sqlite3AddNotNull(pParse, R);} +ccons ::= PRIMARY KEY sortorder(Z) onconf(R) autoinc(I). + {sqlite3AddPrimaryKey(pParse,0,R,I,Z);} +ccons ::= UNIQUE onconf(R). {sqlite3CreateIndex(pParse,0,0,0,0,R,0,0,0,0);} +ccons ::= CHECK LP expr(X) RP. {sqlite3AddCheckConstraint(pParse,X.pExpr);} +ccons ::= REFERENCES nm(T) idxlist_opt(TA) refargs(R). + {sqlite3CreateForeignKey(pParse,0,&T,TA,R);} +ccons ::= defer_subclause(D). {sqlite3DeferForeignKey(pParse,D);} +ccons ::= COLLATE ids(C). {sqlite3AddCollateType(pParse, &C);} + +// The optional AUTOINCREMENT keyword +%type autoinc {int} +autoinc(X) ::= . {X = 0;} +autoinc(X) ::= AUTOINCR. {X = 1;} + +// The next group of rules parses the arguments to a REFERENCES clause +// that determine if the referential integrity checking is deferred or +// or immediate and which determine what action to take if a ref-integ +// check fails. +// +%type refargs {int} +refargs(A) ::= . { A = OE_None*0x0101; /* EV: R-19803-45884 */} +refargs(A) ::= refargs(X) refarg(Y). { A = (X & ~Y.mask) | Y.value; } +%type refarg {struct {int value; int mask;}} +refarg(A) ::= MATCH nm. { A.value = 0; A.mask = 0x000000; } +refarg(A) ::= ON INSERT refact. { A.value = 0; A.mask = 0x000000; } +refarg(A) ::= ON DELETE refact(X). { A.value = X; A.mask = 0x0000ff; } +refarg(A) ::= ON UPDATE refact(X). { A.value = X<<8; A.mask = 0x00ff00; } +%type refact {int} +refact(A) ::= SET NULL. { A = OE_SetNull; /* EV: R-33326-45252 */} +refact(A) ::= SET DEFAULT. { A = OE_SetDflt; /* EV: R-33326-45252 */} +refact(A) ::= CASCADE. { A = OE_Cascade; /* EV: R-33326-45252 */} +refact(A) ::= RESTRICT. { A = OE_Restrict; /* EV: R-33326-45252 */} +refact(A) ::= NO ACTION. { A = OE_None; /* EV: R-33326-45252 */} +%type defer_subclause {int} +defer_subclause(A) ::= NOT DEFERRABLE init_deferred_pred_opt. {A = 0;} +defer_subclause(A) ::= DEFERRABLE init_deferred_pred_opt(X). {A = X;} +%type init_deferred_pred_opt {int} +init_deferred_pred_opt(A) ::= . {A = 0;} +init_deferred_pred_opt(A) ::= INITIALLY DEFERRED. {A = 1;} +init_deferred_pred_opt(A) ::= INITIALLY IMMEDIATE. {A = 0;} + +// For the time being, the only constraint we care about is the primary +// key and UNIQUE. Both create indices. +// +conslist_opt(A) ::= . {A.n = 0; A.z = 0;} +conslist_opt(A) ::= COMMA(X) conslist. {A = X;} +conslist ::= conslist COMMA tcons. +conslist ::= conslist tcons. +conslist ::= tcons. +tcons ::= CONSTRAINT nm. +tcons ::= PRIMARY KEY LP idxlist(X) autoinc(I) RP onconf(R). + {sqlite3AddPrimaryKey(pParse,X,R,I,0);} +tcons ::= UNIQUE LP idxlist(X) RP onconf(R). + {sqlite3CreateIndex(pParse,0,0,0,X,R,0,0,0,0);} +tcons ::= CHECK LP expr(E) RP onconf. + {sqlite3AddCheckConstraint(pParse,E.pExpr);} +tcons ::= FOREIGN KEY LP idxlist(FA) RP + REFERENCES nm(T) idxlist_opt(TA) refargs(R) defer_subclause_opt(D). { + sqlite3CreateForeignKey(pParse, FA, &T, TA, R); + sqlite3DeferForeignKey(pParse, D); +} +%type defer_subclause_opt {int} +defer_subclause_opt(A) ::= . {A = 0;} +defer_subclause_opt(A) ::= defer_subclause(X). {A = X;} + +// The following is a non-standard extension that allows us to declare the +// default behavior when there is a constraint conflict. +// +%type onconf {int} +%type orconf {u8} +%type resolvetype {int} +onconf(A) ::= . {A = OE_Default;} +onconf(A) ::= ON CONFLICT resolvetype(X). {A = X;} +orconf(A) ::= . {A = OE_Default;} +orconf(A) ::= OR resolvetype(X). {A = (u8)X;} +resolvetype(A) ::= raisetype(X). {A = X;} +resolvetype(A) ::= IGNORE. {A = OE_Ignore;} +resolvetype(A) ::= REPLACE. {A = OE_Replace;} + +////////////////////////// The DROP TABLE ///////////////////////////////////// +// +cmd ::= DROP TABLE ifexists(E) fullname(X). { + sqlite3DropTable(pParse, X, 0, E); +} +%type ifexists {int} +ifexists(A) ::= IF EXISTS. {A = 1;} +ifexists(A) ::= . {A = 0;} + +///////////////////// The CREATE VIEW statement ///////////////////////////// +// +%ifndef SQLITE_OMIT_VIEW +cmd ::= createkw(X) temp(T) VIEW ifnotexists(E) nm(Y) dbnm(Z) AS select(S). { + sqlite3CreateView(pParse, &X, &Y, &Z, S, T, E); +} +cmd ::= DROP VIEW ifexists(E) fullname(X). { + sqlite3DropTable(pParse, X, 1, E); +} +%endif SQLITE_OMIT_VIEW + +//////////////////////// The SELECT statement ///////////////////////////////// +// +cmd ::= select(X). { + SelectDest dest = {SRT_Output, 0, 0, 0, 0}; + sqlite3Select(pParse, X, &dest); + sqlite3SelectDelete(pParse->db, X); +} + +%type select {Select*} +%destructor select {sqlite3SelectDelete(pParse->db, $$);} +%type oneselect {Select*} +%destructor oneselect {sqlite3SelectDelete(pParse->db, $$);} + +select(A) ::= oneselect(X). {A = X;} +%ifndef SQLITE_OMIT_COMPOUND_SELECT +select(A) ::= select(X) multiselect_op(Y) oneselect(Z). { + if( Z ){ + Z->op = (u8)Y; + Z->pPrior = X; + }else{ + sqlite3SelectDelete(pParse->db, X); + } + A = Z; +} +%type multiselect_op {int} +multiselect_op(A) ::= UNION(OP). {A = @OP;} +multiselect_op(A) ::= UNION ALL. {A = TK_ALL;} +multiselect_op(A) ::= EXCEPT|INTERSECT(OP). {A = @OP;} +%endif SQLITE_OMIT_COMPOUND_SELECT +oneselect(A) ::= SELECT distinct(D) selcollist(W) from(X) where_opt(Y) + groupby_opt(P) having_opt(Q) orderby_opt(Z) limit_opt(L). { + A = sqlite3SelectNew(pParse,W,X,Y,P,Q,Z,D,L.pLimit,L.pOffset); +} + +// The "distinct" nonterminal is true (1) if the DISTINCT keyword is +// present and false (0) if it is not. +// +%type distinct {int} +distinct(A) ::= DISTINCT. {A = 1;} +distinct(A) ::= ALL. {A = 0;} +distinct(A) ::= . {A = 0;} + +// selcollist is a list of expressions that are to become the return +// values of the SELECT statement. The "*" in statements like +// "SELECT * FROM ..." is encoded as a special expression with an +// opcode of TK_ALL. +// +%type selcollist {ExprList*} +%destructor selcollist {sqlite3ExprListDelete(pParse->db, $$);} +%type sclp {ExprList*} +%destructor sclp {sqlite3ExprListDelete(pParse->db, $$);} +sclp(A) ::= selcollist(X) COMMA. {A = X;} +sclp(A) ::= . {A = 0;} +selcollist(A) ::= sclp(P) expr(X) as(Y). { + A = sqlite3ExprListAppend(pParse, P, X.pExpr); + if( Y.n>0 ) sqlite3ExprListSetName(pParse, A, &Y, 1); + sqlite3ExprListSetSpan(pParse,A,&X); +} +selcollist(A) ::= sclp(P) STAR. { + Expr *p = sqlite3Expr(pParse->db, TK_ALL, 0); + A = sqlite3ExprListAppend(pParse, P, p); +} +selcollist(A) ::= sclp(P) nm(X) DOT STAR(Y). { + Expr *pRight = sqlite3PExpr(pParse, TK_ALL, 0, 0, &Y); + Expr *pLeft = sqlite3PExpr(pParse, TK_ID, 0, 0, &X); + Expr *pDot = sqlite3PExpr(pParse, TK_DOT, pLeft, pRight, 0); + A = sqlite3ExprListAppend(pParse,P, pDot); +} + +// An option "AS <id>" phrase that can follow one of the expressions that +// define the result set, or one of the tables in the FROM clause. +// +%type as {Token} +as(X) ::= AS nm(Y). {X = Y;} +as(X) ::= ids(Y). {X = Y;} +as(X) ::= . {X.n = 0;} + + +%type seltablist {SrcList*} +%destructor seltablist {sqlite3SrcListDelete(pParse->db, $$);} +%type stl_prefix {SrcList*} +%destructor stl_prefix {sqlite3SrcListDelete(pParse->db, $$);} +%type from {SrcList*} +%destructor from {sqlite3SrcListDelete(pParse->db, $$);} + +// A complete FROM clause. +// +from(A) ::= . {A = sqlite3DbMallocZero(pParse->db, sizeof(*A));} +from(A) ::= FROM seltablist(X). { + A = X; + sqlite3SrcListShiftJoinType(A); +} + +// "seltablist" is a "Select Table List" - the content of the FROM clause +// in a SELECT statement. "stl_prefix" is a prefix of this list. +// +stl_prefix(A) ::= seltablist(X) joinop(Y). { + A = X; + if( ALWAYS(A && A->nSrc>0) ) A->a[A->nSrc-1].jointype = (u8)Y; +} +stl_prefix(A) ::= . {A = 0;} +seltablist(A) ::= stl_prefix(X) nm(Y) dbnm(D) as(Z) indexed_opt(I) on_opt(N) using_opt(U). { + A = sqlite3SrcListAppendFromTerm(pParse,X,&Y,&D,&Z,0,N,U); + sqlite3SrcListIndexedBy(pParse, A, &I); +} +%ifndef SQLITE_OMIT_SUBQUERY + seltablist(A) ::= stl_prefix(X) LP select(S) RP + as(Z) on_opt(N) using_opt(U). { + A = sqlite3SrcListAppendFromTerm(pParse,X,0,0,&Z,S,N,U); + } + seltablist(A) ::= stl_prefix(X) LP seltablist(F) RP + as(Z) on_opt(N) using_opt(U). { + if( X==0 && Z.n==0 && N==0 && U==0 ){ + A = F; + }else{ + Select *pSubquery; + sqlite3SrcListShiftJoinType(F); + pSubquery = sqlite3SelectNew(pParse,0,F,0,0,0,0,0,0,0); + A = sqlite3SrcListAppendFromTerm(pParse,X,0,0,&Z,pSubquery,N,U); + } + } + + // A seltablist_paren nonterminal represents anything in a FROM that + // is contained inside parentheses. This can be either a subquery or + // a grouping of table and subqueries. + // +// %type seltablist_paren {Select*} +// %destructor seltablist_paren {sqlite3SelectDelete(pParse->db, $$);} +// seltablist_paren(A) ::= select(S). {A = S;} +// seltablist_paren(A) ::= seltablist(F). { +// sqlite3SrcListShiftJoinType(F); +// A = sqlite3SelectNew(pParse,0,F,0,0,0,0,0,0,0); +// } +%endif SQLITE_OMIT_SUBQUERY + +%type dbnm {Token} +dbnm(A) ::= . {A.z=0; A.n=0;} +dbnm(A) ::= DOT nm(X). {A = X;} + +%type fullname {SrcList*} +%destructor fullname {sqlite3SrcListDelete(pParse->db, $$);} +fullname(A) ::= nm(X) dbnm(Y). {A = sqlite3SrcListAppend(pParse->db,0,&X,&Y);} + +%type joinop {int} +%type joinop2 {int} +joinop(X) ::= COMMA|JOIN. { X = JT_INNER; } +joinop(X) ::= JOIN_KW(A) JOIN. { X = sqlite3JoinType(pParse,&A,0,0); } +joinop(X) ::= JOIN_KW(A) nm(B) JOIN. { X = sqlite3JoinType(pParse,&A,&B,0); } +joinop(X) ::= JOIN_KW(A) nm(B) nm(C) JOIN. + { X = sqlite3JoinType(pParse,&A,&B,&C); } + +%type on_opt {Expr*} +%destructor on_opt {sqlite3ExprDelete(pParse->db, $$);} +on_opt(N) ::= ON expr(E). {N = E.pExpr;} +on_opt(N) ::= . {N = 0;} + +// Note that this block abuses the Token type just a little. If there is +// no "INDEXED BY" clause, the returned token is empty (z==0 && n==0). If +// there is an INDEXED BY clause, then the token is populated as per normal, +// with z pointing to the token data and n containing the number of bytes +// in the token. +// +// If there is a "NOT INDEXED" clause, then (z==0 && n==1), which is +// normally illegal. The sqlite3SrcListIndexedBy() function +// recognizes and interprets this as a special case. +// +%type indexed_opt {Token} +indexed_opt(A) ::= . {A.z=0; A.n=0;} +indexed_opt(A) ::= INDEXED BY nm(X). {A = X;} +indexed_opt(A) ::= NOT INDEXED. {A.z=0; A.n=1;} + +%type using_opt {IdList*} +%destructor using_opt {sqlite3IdListDelete(pParse->db, $$);} +using_opt(U) ::= USING LP inscollist(L) RP. {U = L;} +using_opt(U) ::= . {U = 0;} + + +%type orderby_opt {ExprList*} +%destructor orderby_opt {sqlite3ExprListDelete(pParse->db, $$);} +%type sortlist {ExprList*} +%destructor sortlist {sqlite3ExprListDelete(pParse->db, $$);} +%type sortitem {Expr*} +%destructor sortitem {sqlite3ExprDelete(pParse->db, $$);} + +orderby_opt(A) ::= . {A = 0;} +orderby_opt(A) ::= ORDER BY sortlist(X). {A = X;} +sortlist(A) ::= sortlist(X) COMMA sortitem(Y) sortorder(Z). { + A = sqlite3ExprListAppend(pParse,X,Y); + if( A ) A->a[A->nExpr-1].sortOrder = (u8)Z; +} +sortlist(A) ::= sortitem(Y) sortorder(Z). { + A = sqlite3ExprListAppend(pParse,0,Y); + if( A && ALWAYS(A->a) ) A->a[0].sortOrder = (u8)Z; +} +sortitem(A) ::= expr(X). {A = X.pExpr;} + +%type sortorder {int} + +sortorder(A) ::= ASC. {A = SQLITE_SO_ASC;} +sortorder(A) ::= DESC. {A = SQLITE_SO_DESC;} +sortorder(A) ::= . {A = SQLITE_SO_ASC;} + +%type groupby_opt {ExprList*} +%destructor groupby_opt {sqlite3ExprListDelete(pParse->db, $$);} +groupby_opt(A) ::= . {A = 0;} +groupby_opt(A) ::= GROUP BY nexprlist(X). {A = X;} + +%type having_opt {Expr*} +%destructor having_opt {sqlite3ExprDelete(pParse->db, $$);} +having_opt(A) ::= . {A = 0;} +having_opt(A) ::= HAVING expr(X). {A = X.pExpr;} + +%type limit_opt {struct LimitVal} + +// The destructor for limit_opt will never fire in the current grammar. +// The limit_opt non-terminal only occurs at the end of a single production +// rule for SELECT statements. As soon as the rule that create the +// limit_opt non-terminal reduces, the SELECT statement rule will also +// reduce. So there is never a limit_opt non-terminal on the stack +// except as a transient. So there is never anything to destroy. +// +//%destructor limit_opt { +// sqlite3ExprDelete(pParse->db, $$.pLimit); +// sqlite3ExprDelete(pParse->db, $$.pOffset); +//} +limit_opt(A) ::= . {A.pLimit = 0; A.pOffset = 0;} +limit_opt(A) ::= LIMIT expr(X). {A.pLimit = X.pExpr; A.pOffset = 0;} +limit_opt(A) ::= LIMIT expr(X) OFFSET expr(Y). + {A.pLimit = X.pExpr; A.pOffset = Y.pExpr;} +limit_opt(A) ::= LIMIT expr(X) COMMA expr(Y). + {A.pOffset = X.pExpr; A.pLimit = Y.pExpr;} + +/////////////////////////// The DELETE statement ///////////////////////////// +// +%ifdef SQLITE_ENABLE_UPDATE_DELETE_LIMIT +cmd ::= DELETE FROM fullname(X) indexed_opt(I) where_opt(W) + orderby_opt(O) limit_opt(L). { + sqlite3SrcListIndexedBy(pParse, X, &I); + W = sqlite3LimitWhere(pParse, X, W, O, L.pLimit, L.pOffset, "DELETE"); + sqlite3DeleteFrom(pParse,X,W); +} +%endif +%ifndef SQLITE_ENABLE_UPDATE_DELETE_LIMIT +cmd ::= DELETE FROM fullname(X) indexed_opt(I) where_opt(W). { + sqlite3SrcListIndexedBy(pParse, X, &I); + sqlite3DeleteFrom(pParse,X,W); +} +%endif + +%type where_opt {Expr*} +%destructor where_opt {sqlite3ExprDelete(pParse->db, $$);} + +where_opt(A) ::= . {A = 0;} +where_opt(A) ::= WHERE expr(X). {A = X.pExpr;} + +////////////////////////// The UPDATE command //////////////////////////////// +// +%ifdef SQLITE_ENABLE_UPDATE_DELETE_LIMIT +cmd ::= UPDATE orconf(R) fullname(X) indexed_opt(I) SET setlist(Y) where_opt(W) orderby_opt(O) limit_opt(L). { + sqlite3SrcListIndexedBy(pParse, X, &I); + sqlite3ExprListCheckLength(pParse,Y,"set list"); + W = sqlite3LimitWhere(pParse, X, W, O, L.pLimit, L.pOffset, "UPDATE"); + sqlite3Update(pParse,X,Y,W,R); +} +%endif +%ifndef SQLITE_ENABLE_UPDATE_DELETE_LIMIT +cmd ::= UPDATE orconf(R) fullname(X) indexed_opt(I) SET setlist(Y) where_opt(W). { + sqlite3SrcListIndexedBy(pParse, X, &I); + sqlite3ExprListCheckLength(pParse,Y,"set list"); + sqlite3Update(pParse,X,Y,W,R); +} +%endif + +%type setlist {ExprList*} +%destructor setlist {sqlite3ExprListDelete(pParse->db, $$);} + +setlist(A) ::= setlist(Z) COMMA nm(X) EQ expr(Y). { + A = sqlite3ExprListAppend(pParse, Z, Y.pExpr); + sqlite3ExprListSetName(pParse, A, &X, 1); +} +setlist(A) ::= nm(X) EQ expr(Y). { + A = sqlite3ExprListAppend(pParse, 0, Y.pExpr); + sqlite3ExprListSetName(pParse, A, &X, 1); +} + +////////////////////////// The INSERT command ///////////////////////////////// +// +cmd ::= insert_cmd(R) INTO fullname(X) inscollist_opt(F) + VALUES LP itemlist(Y) RP. + {sqlite3Insert(pParse, X, Y, 0, F, R);} +cmd ::= insert_cmd(R) INTO fullname(X) inscollist_opt(F) select(S). + {sqlite3Insert(pParse, X, 0, S, F, R);} +cmd ::= insert_cmd(R) INTO fullname(X) inscollist_opt(F) DEFAULT VALUES. + {sqlite3Insert(pParse, X, 0, 0, F, R);} + +%type insert_cmd {u8} +insert_cmd(A) ::= INSERT orconf(R). {A = R;} +insert_cmd(A) ::= REPLACE. {A = OE_Replace;} + + +%type itemlist {ExprList*} +%destructor itemlist {sqlite3ExprListDelete(pParse->db, $$);} + +itemlist(A) ::= itemlist(X) COMMA expr(Y). + {A = sqlite3ExprListAppend(pParse,X,Y.pExpr);} +itemlist(A) ::= expr(X). + {A = sqlite3ExprListAppend(pParse,0,X.pExpr);} + +%type inscollist_opt {IdList*} +%destructor inscollist_opt {sqlite3IdListDelete(pParse->db, $$);} +%type inscollist {IdList*} +%destructor inscollist {sqlite3IdListDelete(pParse->db, $$);} + +inscollist_opt(A) ::= . {A = 0;} +inscollist_opt(A) ::= LP inscollist(X) RP. {A = X;} +inscollist(A) ::= inscollist(X) COMMA nm(Y). + {A = sqlite3IdListAppend(pParse->db,X,&Y);} +inscollist(A) ::= nm(Y). + {A = sqlite3IdListAppend(pParse->db,0,&Y);} + +/////////////////////////// Expression Processing ///////////////////////////// +// + +%type expr {ExprSpan} +%destructor expr {sqlite3ExprDelete(pParse->db, $$.pExpr);} +%type term {ExprSpan} +%destructor term {sqlite3ExprDelete(pParse->db, $$.pExpr);} + +%include { + /* This is a utility routine used to set the ExprSpan.zStart and + ** ExprSpan.zEnd values of pOut so that the span covers the complete + ** range of text beginning with pStart and going to the end of pEnd. + */ + static void spanSet(ExprSpan *pOut, Token *pStart, Token *pEnd){ + pOut->zStart = pStart->z; + pOut->zEnd = &pEnd->z[pEnd->n]; + } + + /* Construct a new Expr object from a single identifier. Use the + ** new Expr to populate pOut. Set the span of pOut to be the identifier + ** that created the expression. + */ + static void spanExpr(ExprSpan *pOut, Parse *pParse, int op, Token *pValue){ + pOut->pExpr = sqlite3PExpr(pParse, op, 0, 0, pValue); + pOut->zStart = pValue->z; + pOut->zEnd = &pValue->z[pValue->n]; + } +} + +expr(A) ::= term(X). {A = X;} +expr(A) ::= LP(B) expr(X) RP(E). {A.pExpr = X.pExpr; spanSet(&A,&B,&E);} +term(A) ::= NULL(X). {spanExpr(&A, pParse, @X, &X);} +expr(A) ::= id(X). {spanExpr(&A, pParse, TK_ID, &X);} +expr(A) ::= JOIN_KW(X). {spanExpr(&A, pParse, TK_ID, &X);} +expr(A) ::= nm(X) DOT nm(Y). { + Expr *temp1 = sqlite3PExpr(pParse, TK_ID, 0, 0, &X); + Expr *temp2 = sqlite3PExpr(pParse, TK_ID, 0, 0, &Y); + A.pExpr = sqlite3PExpr(pParse, TK_DOT, temp1, temp2, 0); + spanSet(&A,&X,&Y); +} +expr(A) ::= nm(X) DOT nm(Y) DOT nm(Z). { + Expr *temp1 = sqlite3PExpr(pParse, TK_ID, 0, 0, &X); + Expr *temp2 = sqlite3PExpr(pParse, TK_ID, 0, 0, &Y); + Expr *temp3 = sqlite3PExpr(pParse, TK_ID, 0, 0, &Z); + Expr *temp4 = sqlite3PExpr(pParse, TK_DOT, temp2, temp3, 0); + A.pExpr = sqlite3PExpr(pParse, TK_DOT, temp1, temp4, 0); + spanSet(&A,&X,&Z); +} +term(A) ::= INTEGER|FLOAT|BLOB(X). {spanExpr(&A, pParse, @X, &X);} +term(A) ::= STRING(X). {spanExpr(&A, pParse, @X, &X);} +expr(A) ::= REGISTER(X). { + /* When doing a nested parse, one can include terms in an expression + ** that look like this: #1 #2 ... These terms refer to registers + ** in the virtual machine. #N is the N-th register. */ + if( pParse->nested==0 ){ + sqlite3ErrorMsg(pParse, "near \"%T\": syntax error", &X); + A.pExpr = 0; + }else{ + A.pExpr = sqlite3PExpr(pParse, TK_REGISTER, 0, 0, &X); + if( A.pExpr ) sqlite3GetInt32(&X.z[1], &A.pExpr->iTable); + } + spanSet(&A, &X, &X); +} +expr(A) ::= VARIABLE(X). { + spanExpr(&A, pParse, TK_VARIABLE, &X); + sqlite3ExprAssignVarNumber(pParse, A.pExpr); + spanSet(&A, &X, &X); +} +expr(A) ::= expr(E) COLLATE ids(C). { + A.pExpr = sqlite3ExprSetCollByToken(pParse, E.pExpr, &C); + A.zStart = E.zStart; + A.zEnd = &C.z[C.n]; +} +%ifndef SQLITE_OMIT_CAST +expr(A) ::= CAST(X) LP expr(E) AS typetoken(T) RP(Y). { + A.pExpr = sqlite3PExpr(pParse, TK_CAST, E.pExpr, 0, &T); + spanSet(&A,&X,&Y); +} +%endif SQLITE_OMIT_CAST +expr(A) ::= ID(X) LP distinct(D) exprlist(Y) RP(E). { + if( Y && Y->nExpr>pParse->db->aLimit[SQLITE_LIMIT_FUNCTION_ARG] ){ + sqlite3ErrorMsg(pParse, "too many arguments on function %T", &X); + } + A.pExpr = sqlite3ExprFunction(pParse, Y, &X); + spanSet(&A,&X,&E); + if( D && A.pExpr ){ + A.pExpr->flags |= EP_Distinct; + } +} +expr(A) ::= ID(X) LP STAR RP(E). { + A.pExpr = sqlite3ExprFunction(pParse, 0, &X); + spanSet(&A,&X,&E); +} +term(A) ::= CTIME_KW(OP). { + /* The CURRENT_TIME, CURRENT_DATE, and CURRENT_TIMESTAMP values are + ** treated as functions that return constants */ + A.pExpr = sqlite3ExprFunction(pParse, 0,&OP); + if( A.pExpr ){ + A.pExpr->op = TK_CONST_FUNC; + } + spanSet(&A, &OP, &OP); +} + +%include { + /* This routine constructs a binary expression node out of two ExprSpan + ** objects and uses the result to populate a new ExprSpan object. + */ + static void spanBinaryExpr( + ExprSpan *pOut, /* Write the result here */ + Parse *pParse, /* The parsing context. Errors accumulate here */ + int op, /* The binary operation */ + ExprSpan *pLeft, /* The left operand */ + ExprSpan *pRight /* The right operand */ + ){ + pOut->pExpr = sqlite3PExpr(pParse, op, pLeft->pExpr, pRight->pExpr, 0); + pOut->zStart = pLeft->zStart; + pOut->zEnd = pRight->zEnd; + } +} + +expr(A) ::= expr(X) AND(OP) expr(Y). {spanBinaryExpr(&A,pParse,@OP,&X,&Y);} +expr(A) ::= expr(X) OR(OP) expr(Y). {spanBinaryExpr(&A,pParse,@OP,&X,&Y);} +expr(A) ::= expr(X) LT|GT|GE|LE(OP) expr(Y). + {spanBinaryExpr(&A,pParse,@OP,&X,&Y);} +expr(A) ::= expr(X) EQ|NE(OP) expr(Y). {spanBinaryExpr(&A,pParse,@OP,&X,&Y);} +expr(A) ::= expr(X) BITAND|BITOR|LSHIFT|RSHIFT(OP) expr(Y). + {spanBinaryExpr(&A,pParse,@OP,&X,&Y);} +expr(A) ::= expr(X) PLUS|MINUS(OP) expr(Y). + {spanBinaryExpr(&A,pParse,@OP,&X,&Y);} +expr(A) ::= expr(X) STAR|SLASH|REM(OP) expr(Y). + {spanBinaryExpr(&A,pParse,@OP,&X,&Y);} +expr(A) ::= expr(X) CONCAT(OP) expr(Y). {spanBinaryExpr(&A,pParse,@OP,&X,&Y);} +%type likeop {struct LikeOp} +likeop(A) ::= LIKE_KW(X). {A.eOperator = X; A.not = 0;} +likeop(A) ::= NOT LIKE_KW(X). {A.eOperator = X; A.not = 1;} +likeop(A) ::= MATCH(X). {A.eOperator = X; A.not = 0;} +likeop(A) ::= NOT MATCH(X). {A.eOperator = X; A.not = 1;} +expr(A) ::= expr(X) likeop(OP) expr(Y). [LIKE_KW] { + ExprList *pList; + pList = sqlite3ExprListAppend(pParse,0, Y.pExpr); + pList = sqlite3ExprListAppend(pParse,pList, X.pExpr); + A.pExpr = sqlite3ExprFunction(pParse, pList, &OP.eOperator); + if( OP.not ) A.pExpr = sqlite3PExpr(pParse, TK_NOT, A.pExpr, 0, 0); + A.zStart = X.zStart; + A.zEnd = Y.zEnd; + if( A.pExpr ) A.pExpr->flags |= EP_InfixFunc; +} +expr(A) ::= expr(X) likeop(OP) expr(Y) ESCAPE expr(E). [LIKE_KW] { + ExprList *pList; + pList = sqlite3ExprListAppend(pParse,0, Y.pExpr); + pList = sqlite3ExprListAppend(pParse,pList, X.pExpr); + pList = sqlite3ExprListAppend(pParse,pList, E.pExpr); + A.pExpr = sqlite3ExprFunction(pParse, pList, &OP.eOperator); + if( OP.not ) A.pExpr = sqlite3PExpr(pParse, TK_NOT, A.pExpr, 0, 0); + A.zStart = X.zStart; + A.zEnd = E.zEnd; + if( A.pExpr ) A.pExpr->flags |= EP_InfixFunc; +} + +%include { + /* Construct an expression node for a unary postfix operator + */ + static void spanUnaryPostfix( + ExprSpan *pOut, /* Write the new expression node here */ + Parse *pParse, /* Parsing context to record errors */ + int op, /* The operator */ + ExprSpan *pOperand, /* The operand */ + Token *pPostOp /* The operand token for setting the span */ + ){ + pOut->pExpr = sqlite3PExpr(pParse, op, pOperand->pExpr, 0, 0); + pOut->zStart = pOperand->zStart; + pOut->zEnd = &pPostOp->z[pPostOp->n]; + } +} + +expr(A) ::= expr(X) ISNULL|NOTNULL(E). {spanUnaryPostfix(&A,pParse,@E,&X,&E);} +expr(A) ::= expr(X) NOT NULL(E). {spanUnaryPostfix(&A,pParse,TK_NOTNULL,&X,&E);} + +%include { + /* A routine to convert a binary TK_IS or TK_ISNOT expression into a + ** unary TK_ISNULL or TK_NOTNULL expression. */ + static void binaryToUnaryIfNull(Parse *pParse, Expr *pY, Expr *pA, int op){ + sqlite3 *db = pParse->db; + if( db->mallocFailed==0 && pY->op==TK_NULL ){ + pA->op = (u8)op; + sqlite3ExprDelete(db, pA->pRight); + pA->pRight = 0; + } + } +} + +// expr1 IS expr2 +// expr1 IS NOT expr2 +// +// If expr2 is NULL then code as TK_ISNULL or TK_NOTNULL. If expr2 +// is any other expression, code as TK_IS or TK_ISNOT. +// +expr(A) ::= expr(X) IS expr(Y). { + spanBinaryExpr(&A,pParse,TK_IS,&X,&Y); + binaryToUnaryIfNull(pParse, Y.pExpr, A.pExpr, TK_ISNULL); +} +expr(A) ::= expr(X) IS NOT expr(Y). { + spanBinaryExpr(&A,pParse,TK_ISNOT,&X,&Y); + binaryToUnaryIfNull(pParse, Y.pExpr, A.pExpr, TK_NOTNULL); +} + +%include { + /* Construct an expression node for a unary prefix operator + */ + static void spanUnaryPrefix( + ExprSpan *pOut, /* Write the new expression node here */ + Parse *pParse, /* Parsing context to record errors */ + int op, /* The operator */ + ExprSpan *pOperand, /* The operand */ + Token *pPreOp /* The operand token for setting the span */ + ){ + pOut->pExpr = sqlite3PExpr(pParse, op, pOperand->pExpr, 0, 0); + pOut->zStart = pPreOp->z; + pOut->zEnd = pOperand->zEnd; + } +} + + + +expr(A) ::= NOT(B) expr(X). {spanUnaryPrefix(&A,pParse,@B,&X,&B);} +expr(A) ::= BITNOT(B) expr(X). {spanUnaryPrefix(&A,pParse,@B,&X,&B);} +expr(A) ::= MINUS(B) expr(X). [BITNOT] + {spanUnaryPrefix(&A,pParse,TK_UMINUS,&X,&B);} +expr(A) ::= PLUS(B) expr(X). [BITNOT] + {spanUnaryPrefix(&A,pParse,TK_UPLUS,&X,&B);} + +%type between_op {int} +between_op(A) ::= BETWEEN. {A = 0;} +between_op(A) ::= NOT BETWEEN. {A = 1;} +expr(A) ::= expr(W) between_op(N) expr(X) AND expr(Y). [BETWEEN] { + ExprList *pList = sqlite3ExprListAppend(pParse,0, X.pExpr); + pList = sqlite3ExprListAppend(pParse,pList, Y.pExpr); + A.pExpr = sqlite3PExpr(pParse, TK_BETWEEN, W.pExpr, 0, 0); + if( A.pExpr ){ + A.pExpr->x.pList = pList; + }else{ + sqlite3ExprListDelete(pParse->db, pList); + } + if( N ) A.pExpr = sqlite3PExpr(pParse, TK_NOT, A.pExpr, 0, 0); + A.zStart = W.zStart; + A.zEnd = Y.zEnd; +} +%ifndef SQLITE_OMIT_SUBQUERY + %type in_op {int} + in_op(A) ::= IN. {A = 0;} + in_op(A) ::= NOT IN. {A = 1;} + expr(A) ::= expr(X) in_op(N) LP exprlist(Y) RP(E). [IN] { + if( Y==0 ){ + /* Expressions of the form + ** + ** expr1 IN () + ** expr1 NOT IN () + ** + ** simplify to constants 0 (false) and 1 (true), respectively, + ** regardless of the value of expr1. + */ + A.pExpr = sqlite3PExpr(pParse, TK_INTEGER, 0, 0, &sqlite3IntTokens[N]); + sqlite3ExprDelete(pParse->db, X.pExpr); + }else{ + A.pExpr = sqlite3PExpr(pParse, TK_IN, X.pExpr, 0, 0); + if( A.pExpr ){ + A.pExpr->x.pList = Y; + sqlite3ExprSetHeight(pParse, A.pExpr); + }else{ + sqlite3ExprListDelete(pParse->db, Y); + } + if( N ) A.pExpr = sqlite3PExpr(pParse, TK_NOT, A.pExpr, 0, 0); + } + A.zStart = X.zStart; + A.zEnd = &E.z[E.n]; + } + expr(A) ::= LP(B) select(X) RP(E). { + A.pExpr = sqlite3PExpr(pParse, TK_SELECT, 0, 0, 0); + if( A.pExpr ){ + A.pExpr->x.pSelect = X; + ExprSetProperty(A.pExpr, EP_xIsSelect); + sqlite3ExprSetHeight(pParse, A.pExpr); + }else{ + sqlite3SelectDelete(pParse->db, X); + } + A.zStart = B.z; + A.zEnd = &E.z[E.n]; + } + expr(A) ::= expr(X) in_op(N) LP select(Y) RP(E). [IN] { + A.pExpr = sqlite3PExpr(pParse, TK_IN, X.pExpr, 0, 0); + if( A.pExpr ){ + A.pExpr->x.pSelect = Y; + ExprSetProperty(A.pExpr, EP_xIsSelect); + sqlite3ExprSetHeight(pParse, A.pExpr); + }else{ + sqlite3SelectDelete(pParse->db, Y); + } + if( N ) A.pExpr = sqlite3PExpr(pParse, TK_NOT, A.pExpr, 0, 0); + A.zStart = X.zStart; + A.zEnd = &E.z[E.n]; + } + expr(A) ::= expr(X) in_op(N) nm(Y) dbnm(Z). [IN] { + SrcList *pSrc = sqlite3SrcListAppend(pParse->db, 0,&Y,&Z); + A.pExpr = sqlite3PExpr(pParse, TK_IN, X.pExpr, 0, 0); + if( A.pExpr ){ + A.pExpr->x.pSelect = sqlite3SelectNew(pParse, 0,pSrc,0,0,0,0,0,0,0); + ExprSetProperty(A.pExpr, EP_xIsSelect); + sqlite3ExprSetHeight(pParse, A.pExpr); + }else{ + sqlite3SrcListDelete(pParse->db, pSrc); + } + if( N ) A.pExpr = sqlite3PExpr(pParse, TK_NOT, A.pExpr, 0, 0); + A.zStart = X.zStart; + A.zEnd = Z.z ? &Z.z[Z.n] : &Y.z[Y.n]; + } + expr(A) ::= EXISTS(B) LP select(Y) RP(E). { + Expr *p = A.pExpr = sqlite3PExpr(pParse, TK_EXISTS, 0, 0, 0); + if( p ){ + p->x.pSelect = Y; + ExprSetProperty(p, EP_xIsSelect); + sqlite3ExprSetHeight(pParse, p); + }else{ + sqlite3SelectDelete(pParse->db, Y); + } + A.zStart = B.z; + A.zEnd = &E.z[E.n]; + } +%endif SQLITE_OMIT_SUBQUERY + +/* CASE expressions */ +expr(A) ::= CASE(C) case_operand(X) case_exprlist(Y) case_else(Z) END(E). { + A.pExpr = sqlite3PExpr(pParse, TK_CASE, X, Z, 0); + if( A.pExpr ){ + A.pExpr->x.pList = Y; + sqlite3ExprSetHeight(pParse, A.pExpr); + }else{ + sqlite3ExprListDelete(pParse->db, Y); + } + A.zStart = C.z; + A.zEnd = &E.z[E.n]; +} +%type case_exprlist {ExprList*} +%destructor case_exprlist {sqlite3ExprListDelete(pParse->db, $$);} +case_exprlist(A) ::= case_exprlist(X) WHEN expr(Y) THEN expr(Z). { + A = sqlite3ExprListAppend(pParse,X, Y.pExpr); + A = sqlite3ExprListAppend(pParse,A, Z.pExpr); +} +case_exprlist(A) ::= WHEN expr(Y) THEN expr(Z). { + A = sqlite3ExprListAppend(pParse,0, Y.pExpr); + A = sqlite3ExprListAppend(pParse,A, Z.pExpr); +} +%type case_else {Expr*} +%destructor case_else {sqlite3ExprDelete(pParse->db, $$);} +case_else(A) ::= ELSE expr(X). {A = X.pExpr;} +case_else(A) ::= . {A = 0;} +%type case_operand {Expr*} +%destructor case_operand {sqlite3ExprDelete(pParse->db, $$);} +case_operand(A) ::= expr(X). {A = X.pExpr;} +case_operand(A) ::= . {A = 0;} + +%type exprlist {ExprList*} +%destructor exprlist {sqlite3ExprListDelete(pParse->db, $$);} +%type nexprlist {ExprList*} +%destructor nexprlist {sqlite3ExprListDelete(pParse->db, $$);} + +exprlist(A) ::= nexprlist(X). {A = X;} +exprlist(A) ::= . {A = 0;} +nexprlist(A) ::= nexprlist(X) COMMA expr(Y). + {A = sqlite3ExprListAppend(pParse,X,Y.pExpr);} +nexprlist(A) ::= expr(Y). + {A = sqlite3ExprListAppend(pParse,0,Y.pExpr);} + + +///////////////////////////// The CREATE INDEX command /////////////////////// +// +cmd ::= createkw(S) uniqueflag(U) INDEX ifnotexists(NE) nm(X) dbnm(D) + ON nm(Y) LP idxlist(Z) RP(E). { + sqlite3CreateIndex(pParse, &X, &D, + sqlite3SrcListAppend(pParse->db,0,&Y,0), Z, U, + &S, &E, SQLITE_SO_ASC, NE); +} + +%type uniqueflag {int} +uniqueflag(A) ::= UNIQUE. {A = OE_Abort;} +uniqueflag(A) ::= . {A = OE_None;} + +%type idxlist {ExprList*} +%destructor idxlist {sqlite3ExprListDelete(pParse->db, $$);} +%type idxlist_opt {ExprList*} +%destructor idxlist_opt {sqlite3ExprListDelete(pParse->db, $$);} + +idxlist_opt(A) ::= . {A = 0;} +idxlist_opt(A) ::= LP idxlist(X) RP. {A = X;} +idxlist(A) ::= idxlist(X) COMMA nm(Y) collate(C) sortorder(Z). { + Expr *p = 0; + if( C.n>0 ){ + p = sqlite3Expr(pParse->db, TK_COLUMN, 0); + sqlite3ExprSetCollByToken(pParse, p, &C); + } + A = sqlite3ExprListAppend(pParse,X, p); + sqlite3ExprListSetName(pParse,A,&Y,1); + sqlite3ExprListCheckLength(pParse, A, "index"); + if( A ) A->a[A->nExpr-1].sortOrder = (u8)Z; +} +idxlist(A) ::= nm(Y) collate(C) sortorder(Z). { + Expr *p = 0; + if( C.n>0 ){ + p = sqlite3PExpr(pParse, TK_COLUMN, 0, 0, 0); + sqlite3ExprSetCollByToken(pParse, p, &C); + } + A = sqlite3ExprListAppend(pParse,0, p); + sqlite3ExprListSetName(pParse, A, &Y, 1); + sqlite3ExprListCheckLength(pParse, A, "index"); + if( A ) A->a[A->nExpr-1].sortOrder = (u8)Z; +} + +%type collate {Token} +collate(C) ::= . {C.z = 0; C.n = 0;} +collate(C) ::= COLLATE ids(X). {C = X;} + + +///////////////////////////// The DROP INDEX command ///////////////////////// +// +cmd ::= DROP INDEX ifexists(E) fullname(X). {sqlite3DropIndex(pParse, X, E);} + +///////////////////////////// The VACUUM command ///////////////////////////// +// +%ifndef SQLITE_OMIT_VACUUM +%ifndef SQLITE_OMIT_ATTACH +cmd ::= VACUUM. {sqlite3Vacuum(pParse);} +cmd ::= VACUUM nm. {sqlite3Vacuum(pParse);} +%endif SQLITE_OMIT_ATTACH +%endif SQLITE_OMIT_VACUUM + +///////////////////////////// The PRAGMA command ///////////////////////////// +// +%ifndef SQLITE_OMIT_PRAGMA +cmd ::= PRAGMA nm(X) dbnm(Z). {sqlite3Pragma(pParse,&X,&Z,0,0);} +cmd ::= PRAGMA nm(X) dbnm(Z) EQ nmnum(Y). {sqlite3Pragma(pParse,&X,&Z,&Y,0);} +cmd ::= PRAGMA nm(X) dbnm(Z) LP nmnum(Y) RP. {sqlite3Pragma(pParse,&X,&Z,&Y,0);} +cmd ::= PRAGMA nm(X) dbnm(Z) EQ minus_num(Y). + {sqlite3Pragma(pParse,&X,&Z,&Y,1);} +cmd ::= PRAGMA nm(X) dbnm(Z) LP minus_num(Y) RP. + {sqlite3Pragma(pParse,&X,&Z,&Y,1);} + +nmnum(A) ::= plus_num(X). {A = X;} +nmnum(A) ::= nm(X). {A = X;} +nmnum(A) ::= ON(X). {A = X;} +nmnum(A) ::= DELETE(X). {A = X;} +nmnum(A) ::= DEFAULT(X). {A = X;} +%endif SQLITE_OMIT_PRAGMA +plus_num(A) ::= plus_opt number(X). {A = X;} +minus_num(A) ::= MINUS number(X). {A = X;} +number(A) ::= INTEGER|FLOAT(X). {A = X;} +plus_opt ::= PLUS. +plus_opt ::= . + +//////////////////////////// The CREATE TRIGGER command ///////////////////// + +%ifndef SQLITE_OMIT_TRIGGER + +cmd ::= createkw trigger_decl(A) BEGIN trigger_cmd_list(S) END(Z). { + Token all; + all.z = A.z; + all.n = (int)(Z.z - A.z) + Z.n; + sqlite3FinishTrigger(pParse, S, &all); +} + +trigger_decl(A) ::= temp(T) TRIGGER ifnotexists(NOERR) nm(B) dbnm(Z) + trigger_time(C) trigger_event(D) + ON fullname(E) foreach_clause when_clause(G). { + sqlite3BeginTrigger(pParse, &B, &Z, C, D.a, D.b, E, G, T, NOERR); + A = (Z.n==0?B:Z); +} + +%type trigger_time {int} +trigger_time(A) ::= BEFORE. { A = TK_BEFORE; } +trigger_time(A) ::= AFTER. { A = TK_AFTER; } +trigger_time(A) ::= INSTEAD OF. { A = TK_INSTEAD;} +trigger_time(A) ::= . { A = TK_BEFORE; } + +%type trigger_event {struct TrigEvent} +%destructor trigger_event {sqlite3IdListDelete(pParse->db, $$.b);} +trigger_event(A) ::= DELETE|INSERT(OP). {A.a = @OP; A.b = 0;} +trigger_event(A) ::= UPDATE(OP). {A.a = @OP; A.b = 0;} +trigger_event(A) ::= UPDATE OF inscollist(X). {A.a = TK_UPDATE; A.b = X;} + +foreach_clause ::= . +foreach_clause ::= FOR EACH ROW. + +%type when_clause {Expr*} +%destructor when_clause {sqlite3ExprDelete(pParse->db, $$);} +when_clause(A) ::= . { A = 0; } +when_clause(A) ::= WHEN expr(X). { A = X.pExpr; } + +%type trigger_cmd_list {TriggerStep*} +%destructor trigger_cmd_list {sqlite3DeleteTriggerStep(pParse->db, $$);} +trigger_cmd_list(A) ::= trigger_cmd_list(Y) trigger_cmd(X) SEMI. { + assert( Y!=0 ); + Y->pLast->pNext = X; + Y->pLast = X; + A = Y; +} +trigger_cmd_list(A) ::= trigger_cmd(X) SEMI. { + assert( X!=0 ); + X->pLast = X; + A = X; +} + +// Disallow qualified table names on INSERT, UPDATE, and DELETE statements +// within a trigger. The table to INSERT, UPDATE, or DELETE is always in +// the same database as the table that the trigger fires on. +// +%type trnm {Token} +trnm(A) ::= nm(X). {A = X;} +trnm(A) ::= nm DOT nm(X). { + A = X; + sqlite3ErrorMsg(pParse, + "qualified table names are not allowed on INSERT, UPDATE, and DELETE " + "statements within triggers"); +} + +// Disallow the INDEX BY and NOT INDEXED clauses on UPDATE and DELETE +// statements within triggers. We make a specific error message for this +// since it is an exception to the default grammar rules. +// +tridxby ::= . +tridxby ::= INDEXED BY nm. { + sqlite3ErrorMsg(pParse, + "the INDEXED BY clause is not allowed on UPDATE or DELETE statements " + "within triggers"); +} +tridxby ::= NOT INDEXED. { + sqlite3ErrorMsg(pParse, + "the NOT INDEXED clause is not allowed on UPDATE or DELETE statements " + "within triggers"); +} + + + +%type trigger_cmd {TriggerStep*} +%destructor trigger_cmd {sqlite3DeleteTriggerStep(pParse->db, $$);} +// UPDATE +trigger_cmd(A) ::= + UPDATE orconf(R) trnm(X) tridxby SET setlist(Y) where_opt(Z). + { A = sqlite3TriggerUpdateStep(pParse->db, &X, Y, Z, R); } + +// INSERT +trigger_cmd(A) ::= + insert_cmd(R) INTO trnm(X) inscollist_opt(F) VALUES LP itemlist(Y) RP. + {A = sqlite3TriggerInsertStep(pParse->db, &X, F, Y, 0, R);} + +trigger_cmd(A) ::= insert_cmd(R) INTO trnm(X) inscollist_opt(F) select(S). + {A = sqlite3TriggerInsertStep(pParse->db, &X, F, 0, S, R);} + +// DELETE +trigger_cmd(A) ::= DELETE FROM trnm(X) tridxby where_opt(Y). + {A = sqlite3TriggerDeleteStep(pParse->db, &X, Y);} + +// SELECT +trigger_cmd(A) ::= select(X). {A = sqlite3TriggerSelectStep(pParse->db, X); } + +// The special RAISE expression that may occur in trigger programs +expr(A) ::= RAISE(X) LP IGNORE RP(Y). { + A.pExpr = sqlite3PExpr(pParse, TK_RAISE, 0, 0, 0); + if( A.pExpr ){ + A.pExpr->affinity = OE_Ignore; + } + A.zStart = X.z; + A.zEnd = &Y.z[Y.n]; +} +expr(A) ::= RAISE(X) LP raisetype(T) COMMA nm(Z) RP(Y). { + A.pExpr = sqlite3PExpr(pParse, TK_RAISE, 0, 0, &Z); + if( A.pExpr ) { + A.pExpr->affinity = (char)T; + } + A.zStart = X.z; + A.zEnd = &Y.z[Y.n]; +} +%endif !SQLITE_OMIT_TRIGGER + +%type raisetype {int} +raisetype(A) ::= ROLLBACK. {A = OE_Rollback;} +raisetype(A) ::= ABORT. {A = OE_Abort;} +raisetype(A) ::= FAIL. {A = OE_Fail;} + + +//////////////////////// DROP TRIGGER statement ////////////////////////////// +%ifndef SQLITE_OMIT_TRIGGER +cmd ::= DROP TRIGGER ifexists(NOERR) fullname(X). { + sqlite3DropTrigger(pParse,X,NOERR); +} +%endif !SQLITE_OMIT_TRIGGER + +//////////////////////// ATTACH DATABASE file AS name ///////////////////////// +%ifndef SQLITE_OMIT_ATTACH +cmd ::= ATTACH database_kw_opt expr(F) AS expr(D) key_opt(K). { + sqlite3Attach(pParse, F.pExpr, D.pExpr, K); +} +cmd ::= DETACH database_kw_opt expr(D). { + sqlite3Detach(pParse, D.pExpr); +} + +%type key_opt {Expr*} +%destructor key_opt {sqlite3ExprDelete(pParse->db, $$);} +key_opt(A) ::= . { A = 0; } +key_opt(A) ::= KEY expr(X). { A = X.pExpr; } + +database_kw_opt ::= DATABASE. +database_kw_opt ::= . +%endif SQLITE_OMIT_ATTACH + +////////////////////////// REINDEX collation ////////////////////////////////// +%ifndef SQLITE_OMIT_REINDEX +cmd ::= REINDEX. {sqlite3Reindex(pParse, 0, 0);} +cmd ::= REINDEX nm(X) dbnm(Y). {sqlite3Reindex(pParse, &X, &Y);} +%endif SQLITE_OMIT_REINDEX + +/////////////////////////////////// ANALYZE /////////////////////////////////// +%ifndef SQLITE_OMIT_ANALYZE +cmd ::= ANALYZE. {sqlite3Analyze(pParse, 0, 0);} +cmd ::= ANALYZE nm(X) dbnm(Y). {sqlite3Analyze(pParse, &X, &Y);} +%endif + +//////////////////////// ALTER TABLE table ... //////////////////////////////// +%ifndef SQLITE_OMIT_ALTERTABLE +cmd ::= ALTER TABLE fullname(X) RENAME TO nm(Z). { + sqlite3AlterRenameTable(pParse,X,&Z); +} +cmd ::= ALTER TABLE add_column_fullname ADD kwcolumn_opt column(Y). { + sqlite3AlterFinishAddColumn(pParse, &Y); +} +add_column_fullname ::= fullname(X). { + pParse->db->lookaside.bEnabled = 0; + sqlite3AlterBeginAddColumn(pParse, X); +} +kwcolumn_opt ::= . +kwcolumn_opt ::= COLUMNKW. +%endif SQLITE_OMIT_ALTERTABLE + +//////////////////////// CREATE VIRTUAL TABLE ... ///////////////////////////// +%ifndef SQLITE_OMIT_VIRTUALTABLE +cmd ::= create_vtab. {sqlite3VtabFinishParse(pParse,0);} +cmd ::= create_vtab LP vtabarglist RP(X). {sqlite3VtabFinishParse(pParse,&X);} +create_vtab ::= createkw VIRTUAL TABLE nm(X) dbnm(Y) USING nm(Z). { + sqlite3VtabBeginParse(pParse, &X, &Y, &Z); +} +vtabarglist ::= vtabarg. +vtabarglist ::= vtabarglist COMMA vtabarg. +vtabarg ::= . {sqlite3VtabArgInit(pParse);} +vtabarg ::= vtabarg vtabargtoken. +vtabargtoken ::= ANY(X). {sqlite3VtabArgExtend(pParse,&X);} +vtabargtoken ::= lp anylist RP(X). {sqlite3VtabArgExtend(pParse,&X);} +lp ::= LP(X). {sqlite3VtabArgExtend(pParse,&X);} +anylist ::= . +anylist ::= anylist LP anylist RP. +anylist ::= anylist ANY. +%endif SQLITE_OMIT_VIRTUALTABLE |