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path: root/kopete/plugins/statistics/sqlite/insert.c
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-rw-r--r--kopete/plugins/statistics/sqlite/insert.c1018
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diff --git a/kopete/plugins/statistics/sqlite/insert.c b/kopete/plugins/statistics/sqlite/insert.c
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--- a/kopete/plugins/statistics/sqlite/insert.c
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@@ -1,1018 +0,0 @@
-/*
-** 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 C code routines that are called by the parser
-** to handle INSERT statements in SQLite.
-**
-** $Id$
-*/
-#include "sqliteInt.h"
-
-/*
-** Set P3 of the most recently inserted opcode to a column affinity
-** string for index pIdx. A column affinity string has one character
-** for each column in the table, according to the affinity of the column:
-**
-** Character Column affinity
-** ------------------------------
-** 'n' NUMERIC
-** 'i' INTEGER
-** 't' TEXT
-** 'o' NONE
-*/
-void sqlite3IndexAffinityStr(Vdbe *v, Index *pIdx){
- if( !pIdx->zColAff ){
- /* The first time a column affinity string for a particular index is
- ** required, it is allocated and populated here. It is then stored as
- ** a member of the Index structure for subsequent use.
- **
- ** The column affinity string will eventually be deleted by
- ** sqliteDeleteIndex() when the Index structure itself is cleaned
- ** up.
- */
- int n;
- Table *pTab = pIdx->pTable;
- pIdx->zColAff = (char *)sqliteMalloc(pIdx->nColumn+1);
- if( !pIdx->zColAff ){
- return;
- }
- for(n=0; n<pIdx->nColumn; n++){
- pIdx->zColAff[n] = pTab->aCol[pIdx->aiColumn[n]].affinity;
- }
- pIdx->zColAff[pIdx->nColumn] = '\0';
- }
-
- sqlite3VdbeChangeP3(v, -1, pIdx->zColAff, 0);
-}
-
-/*
-** Set P3 of the most recently inserted opcode to a column affinity
-** string for table pTab. A column affinity string has one character
-** for each column indexed by the index, according to the affinity of the
-** column:
-**
-** Character Column affinity
-** ------------------------------
-** 'n' NUMERIC
-** 'i' INTEGER
-** 't' TEXT
-** 'o' NONE
-*/
-void sqlite3TableAffinityStr(Vdbe *v, Table *pTab){
- /* The first time a column affinity string for a particular table
- ** is required, it is allocated and populated here. It is then
- ** stored as a member of the Table structure for subsequent use.
- **
- ** The column affinity string will eventually be deleted by
- ** sqlite3DeleteTable() when the Table structure itself is cleaned up.
- */
- if( !pTab->zColAff ){
- char *zColAff;
- int i;
-
- zColAff = (char *)sqliteMalloc(pTab->nCol+1);
- if( !zColAff ){
- return;
- }
-
- for(i=0; i<pTab->nCol; i++){
- zColAff[i] = pTab->aCol[i].affinity;
- }
- zColAff[pTab->nCol] = '\0';
-
- pTab->zColAff = zColAff;
- }
-
- sqlite3VdbeChangeP3(v, -1, pTab->zColAff, 0);
-}
-
-
-/*
-** This routine is call to handle SQL of the following forms:
-**
-** insert into TABLE (IDLIST) values(EXPRLIST)
-** insert into TABLE (IDLIST) select
-**
-** The IDLIST following the table name is always optional. If omitted,
-** then a list of all columns for the table is substituted. The IDLIST
-** appears in the pColumn parameter. pColumn is NULL if IDLIST is omitted.
-**
-** The pList parameter holds EXPRLIST in the first form of the INSERT
-** statement above, and pSelect is NULL. For the second form, pList is
-** NULL and pSelect is a pointer to the select statement used to generate
-** data for the insert.
-**
-** The code generated follows one of three templates. For a simple
-** select with data coming from a VALUES clause, the code executes
-** once straight down through. The template looks like this:
-**
-** open write cursor to <table> and its indices
-** puts VALUES clause expressions onto the stack
-** write the resulting record into <table>
-** cleanup
-**
-** If the statement is of the form
-**
-** INSERT INTO <table> SELECT ...
-**
-** And the SELECT clause does not read from <table> at any time, then
-** the generated code follows this template:
-**
-** goto B
-** A: setup for the SELECT
-** loop over the tables in the SELECT
-** gosub C
-** end loop
-** cleanup after the SELECT
-** goto D
-** B: open write cursor to <table> and its indices
-** goto A
-** C: insert the select result into <table>
-** return
-** D: cleanup
-**
-** The third template is used if the insert statement takes its
-** values from a SELECT but the data is being inserted into a table
-** that is also read as part of the SELECT. In the third form,
-** we have to use a intermediate table to store the results of
-** the select. The template is like this:
-**
-** goto B
-** A: setup for the SELECT
-** loop over the tables in the SELECT
-** gosub C
-** end loop
-** cleanup after the SELECT
-** goto D
-** C: insert the select result into the intermediate table
-** return
-** B: open a cursor to an intermediate table
-** goto A
-** D: open write cursor to <table> and its indices
-** loop over the intermediate table
-** transfer values form intermediate table into <table>
-** end the loop
-** cleanup
-*/
-void sqlite3Insert(
- Parse *pParse, /* Parser context */
- SrcList *pTabList, /* Name of table into which we are inserting */
- ExprList *pList, /* List of values to be inserted */
- Select *pSelect, /* A SELECT statement to use as the data source */
- IdList *pColumn, /* Column names corresponding to IDLIST. */
- int onError /* How to handle constraint errors */
-){
- Table *pTab; /* The table to insert into */
- char *zTab; /* Name of the table into which we are inserting */
- const char *zDb; /* Name of the database holding this table */
- int i, j, idx; /* Loop counters */
- Vdbe *v; /* Generate code into this virtual machine */
- Index *pIdx; /* For looping over indices of the table */
- int nColumn; /* Number of columns in the data */
- int base = 0; /* VDBE Cursor number for pTab */
- int iCont=0,iBreak=0; /* Beginning and end of the loop over srcTab */
- sqlite3 *db; /* The main database structure */
- int keyColumn = -1; /* Column that is the INTEGER PRIMARY KEY */
- int endOfLoop; /* Label for the end of the insertion loop */
- int useTempTable; /* Store SELECT results in intermediate table */
- int srcTab = 0; /* Data comes from this temporary cursor if >=0 */
- int iSelectLoop = 0; /* Address of code that implements the SELECT */
- int iCleanup = 0; /* Address of the cleanup code */
- int iInsertBlock = 0; /* Address of the subroutine used to insert data */
- int iCntMem = 0; /* Memory cell used for the row counter */
- int isView; /* True if attempting to insert into a view */
-
- int row_triggers_exist = 0; /* True if there are FOR EACH ROW triggers */
- int before_triggers; /* True if there are BEFORE triggers */
- int after_triggers; /* True if there are AFTER triggers */
- int newIdx = -1; /* Cursor for the NEW table */
-
- if( pParse->nErr || sqlite3_malloc_failed ) goto insert_cleanup;
- db = pParse->db;
-
- /* Locate the table into which we will be inserting new information.
- */
- assert( pTabList->nSrc==1 );
- zTab = pTabList->a[0].zName;
- if( zTab==0 ) goto insert_cleanup;
- pTab = sqlite3SrcListLookup(pParse, pTabList);
- if( pTab==0 ){
- goto insert_cleanup;
- }
- assert( pTab->iDb<db->nDb );
- zDb = db->aDb[pTab->iDb].zName;
- if( sqlite3AuthCheck(pParse, SQLITE_INSERT, pTab->zName, 0, zDb) ){
- goto insert_cleanup;
- }
-
- /* Ensure that:
- * (a) the table is not read-only,
- * (b) that if it is a view then ON INSERT triggers exist
- */
- before_triggers = sqlite3TriggersExist(pParse, pTab->pTrigger, TK_INSERT,
- TK_BEFORE, TK_ROW, 0);
- after_triggers = sqlite3TriggersExist(pParse, pTab->pTrigger, TK_INSERT,
- TK_AFTER, TK_ROW, 0);
- row_triggers_exist = before_triggers || after_triggers;
- isView = pTab->pSelect!=0;
- if( sqlite3IsReadOnly(pParse, pTab, before_triggers) ){
- goto insert_cleanup;
- }
- if( pTab==0 ) goto insert_cleanup;
-
- /* If pTab is really a view, make sure it has been initialized.
- */
- if( isView && sqlite3ViewGetColumnNames(pParse, pTab) ){
- goto insert_cleanup;
- }
-
- /* Ensure all required collation sequences are available. */
- for(pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext){
- if( sqlite3CheckIndexCollSeq(pParse, pIdx) ){
- goto insert_cleanup;
- }
- }
-
- /* Allocate a VDBE
- */
- v = sqlite3GetVdbe(pParse);
- if( v==0 ) goto insert_cleanup;
- sqlite3VdbeCountChanges(v);
- sqlite3BeginWriteOperation(pParse, pSelect || row_triggers_exist, pTab->iDb);
-
- /* if there are row triggers, allocate a temp table for new.* references. */
- if( row_triggers_exist ){
- newIdx = pParse->nTab++;
- }
-
- /* Figure out how many columns of data are supplied. If the data
- ** is coming from a SELECT statement, then this step also generates
- ** all the code to implement the SELECT statement and invoke a subroutine
- ** to process each row of the result. (Template 2.) If the SELECT
- ** statement uses the the table that is being inserted into, then the
- ** subroutine is also coded here. That subroutine stores the SELECT
- ** results in a temporary table. (Template 3.)
- */
- if( pSelect ){
- /* Data is coming from a SELECT. Generate code to implement that SELECT
- */
- int rc, iInitCode;
- iInitCode = sqlite3VdbeAddOp(v, OP_Goto, 0, 0);
- iSelectLoop = sqlite3VdbeCurrentAddr(v);
- iInsertBlock = sqlite3VdbeMakeLabel(v);
- rc = sqlite3Select(pParse, pSelect, SRT_Subroutine, iInsertBlock, 0,0,0,0);
- if( rc || pParse->nErr || sqlite3_malloc_failed ) goto insert_cleanup;
- iCleanup = sqlite3VdbeMakeLabel(v);
- sqlite3VdbeAddOp(v, OP_Goto, 0, iCleanup);
- assert( pSelect->pEList );
- nColumn = pSelect->pEList->nExpr;
-
- /* Set useTempTable to TRUE if the result of the SELECT statement
- ** should be written into a temporary table. Set to FALSE if each
- ** row of the SELECT can be written directly into the result table.
- **
- ** A temp table must be used if the table being updated is also one
- ** of the tables being read by the SELECT statement. Also use a
- ** temp table in the case of row triggers.
- */
- if( row_triggers_exist ){
- useTempTable = 1;
- }else{
- int addr = 0;
- useTempTable = 0;
- while( useTempTable==0 ){
- VdbeOp *pOp;
- addr = sqlite3VdbeFindOp(v, addr, OP_OpenRead, pTab->tnum);
- if( addr==0 ) break;
- pOp = sqlite3VdbeGetOp(v, addr-2);
- if( pOp->opcode==OP_Integer && pOp->p1==pTab->iDb ){
- useTempTable = 1;
- }
- }
- }
-
- if( useTempTable ){
- /* Generate the subroutine that SELECT calls to process each row of
- ** the result. Store the result in a temporary table
- */
- srcTab = pParse->nTab++;
- sqlite3VdbeResolveLabel(v, iInsertBlock);
- sqlite3VdbeAddOp(v, OP_MakeRecord, nColumn, 0);
- sqlite3TableAffinityStr(v, pTab);
- sqlite3VdbeAddOp(v, OP_NewRecno, srcTab, 0);
- sqlite3VdbeAddOp(v, OP_Pull, 1, 0);
- sqlite3VdbeAddOp(v, OP_PutIntKey, srcTab, 0);
- sqlite3VdbeAddOp(v, OP_Return, 0, 0);
-
- /* The following code runs first because the GOTO at the very top
- ** of the program jumps to it. Create the temporary table, then jump
- ** back up and execute the SELECT code above.
- */
- sqlite3VdbeChangeP2(v, iInitCode, sqlite3VdbeCurrentAddr(v));
- sqlite3VdbeAddOp(v, OP_OpenTemp, srcTab, 0);
- sqlite3VdbeAddOp(v, OP_SetNumColumns, srcTab, nColumn);
- sqlite3VdbeAddOp(v, OP_Goto, 0, iSelectLoop);
- sqlite3VdbeResolveLabel(v, iCleanup);
- }else{
- sqlite3VdbeChangeP2(v, iInitCode, sqlite3VdbeCurrentAddr(v));
- }
- }else{
- /* This is the case if the data for the INSERT is coming from a VALUES
- ** clause
- */
- SrcList dummy;
- assert( pList!=0 );
- srcTab = -1;
- useTempTable = 0;
- assert( pList );
- nColumn = pList->nExpr;
- dummy.nSrc = 0;
- for(i=0; i<nColumn; i++){
- if( sqlite3ExprResolveAndCheck(pParse,&dummy,0,pList->a[i].pExpr,0,0) ){
- goto insert_cleanup;
- }
- }
- }
-
- /* Make sure the number of columns in the source data matches the number
- ** of columns to be inserted into the table.
- */
- if( pColumn==0 && nColumn!=pTab->nCol ){
- sqlite3ErrorMsg(pParse,
- "table %S has %d columns but %d values were supplied",
- pTabList, 0, pTab->nCol, nColumn);
- goto insert_cleanup;
- }
- if( pColumn!=0 && nColumn!=pColumn->nId ){
- sqlite3ErrorMsg(pParse, "%d values for %d columns", nColumn, pColumn->nId);
- goto insert_cleanup;
- }
-
- /* If the INSERT statement included an IDLIST term, then make sure
- ** all elements of the IDLIST really are columns of the table and
- ** remember the column indices.
- **
- ** If the table has an INTEGER PRIMARY KEY column and that column
- ** is named in the IDLIST, then record in the keyColumn variable
- ** the index into IDLIST of the primary key column. keyColumn is
- ** the index of the primary key as it appears in IDLIST, not as
- ** is appears in the original table. (The index of the primary
- ** key in the original table is pTab->iPKey.)
- */
- if( pColumn ){
- for(i=0; i<pColumn->nId; i++){
- pColumn->a[i].idx = -1;
- }
- for(i=0; i<pColumn->nId; i++){
- for(j=0; j<pTab->nCol; j++){
- if( sqlite3StrICmp(pColumn->a[i].zName, pTab->aCol[j].zName)==0 ){
- pColumn->a[i].idx = j;
- if( j==pTab->iPKey ){
- keyColumn = i;
- }
- break;
- }
- }
- if( j>=pTab->nCol ){
- if( sqlite3IsRowid(pColumn->a[i].zName) ){
- keyColumn = i;
- }else{
- sqlite3ErrorMsg(pParse, "table %S has no column named %s",
- pTabList, 0, pColumn->a[i].zName);
- pParse->nErr++;
- goto insert_cleanup;
- }
- }
- }
- }
-
- /* If there is no IDLIST term but the table has an integer primary
- ** key, the set the keyColumn variable to the primary key column index
- ** in the original table definition.
- */
- if( pColumn==0 ){
- keyColumn = pTab->iPKey;
- }
-
- /* Open the temp table for FOR EACH ROW triggers
- */
- if( row_triggers_exist ){
- sqlite3VdbeAddOp(v, OP_OpenPseudo, newIdx, 0);
- sqlite3VdbeAddOp(v, OP_SetNumColumns, newIdx, pTab->nCol);
- }
-
- /* Initialize the count of rows to be inserted
- */
- if( db->flags & SQLITE_CountRows ){
- iCntMem = pParse->nMem++;
- sqlite3VdbeAddOp(v, OP_Integer, 0, 0);
- sqlite3VdbeAddOp(v, OP_MemStore, iCntMem, 1);
- }
-
- /* Open tables and indices if there are no row triggers */
- if( !row_triggers_exist ){
- base = pParse->nTab;
- sqlite3OpenTableAndIndices(pParse, pTab, base, OP_OpenWrite);
- }
-
- /* If the data source is a temporary table, then we have to create
- ** a loop because there might be multiple rows of data. If the data
- ** source is a subroutine call from the SELECT statement, then we need
- ** to launch the SELECT statement processing.
- */
- if( useTempTable ){
- iBreak = sqlite3VdbeMakeLabel(v);
- sqlite3VdbeAddOp(v, OP_Rewind, srcTab, iBreak);
- iCont = sqlite3VdbeCurrentAddr(v);
- }else if( pSelect ){
- sqlite3VdbeAddOp(v, OP_Goto, 0, iSelectLoop);
- sqlite3VdbeResolveLabel(v, iInsertBlock);
- }
-
- /* Run the BEFORE and INSTEAD OF triggers, if there are any
- */
- endOfLoop = sqlite3VdbeMakeLabel(v);
- if( before_triggers ){
-
- /* build the NEW.* reference row. Note that if there is an INTEGER
- ** PRIMARY KEY into which a NULL is being inserted, that NULL will be
- ** translated into a unique ID for the row. But on a BEFORE trigger,
- ** we do not know what the unique ID will be (because the insert has
- ** not happened yet) so we substitute a rowid of -1
- */
- if( keyColumn<0 ){
- sqlite3VdbeAddOp(v, OP_Integer, -1, 0);
- }else if( useTempTable ){
- sqlite3VdbeAddOp(v, OP_Column, srcTab, keyColumn);
- }else if( pSelect ){
- sqlite3VdbeAddOp(v, OP_Dup, nColumn - keyColumn - 1, 1);
- }else{
- sqlite3ExprCode(pParse, pList->a[keyColumn].pExpr);
- sqlite3VdbeAddOp(v, OP_NotNull, -1, sqlite3VdbeCurrentAddr(v)+3);
- sqlite3VdbeAddOp(v, OP_Pop, 1, 0);
- sqlite3VdbeAddOp(v, OP_Integer, -1, 0);
- sqlite3VdbeAddOp(v, OP_MustBeInt, 0, 0);
- }
-
- /* Create the new column data
- */
- for(i=0; i<pTab->nCol; i++){
- if( pColumn==0 ){
- j = i;
- }else{
- for(j=0; j<pColumn->nId; j++){
- if( pColumn->a[j].idx==i ) break;
- }
- }
- if( pColumn && j>=pColumn->nId ){
- sqlite3VdbeOp3(v, OP_String8, 0, 0, pTab->aCol[i].zDflt, P3_STATIC);
- }else if( useTempTable ){
- sqlite3VdbeAddOp(v, OP_Column, srcTab, j);
- }else if( pSelect ){
- sqlite3VdbeAddOp(v, OP_Dup, nColumn-j-1, 1);
- }else{
- sqlite3ExprCode(pParse, pList->a[j].pExpr);
- }
- }
- sqlite3VdbeAddOp(v, OP_MakeRecord, pTab->nCol, 0);
-
- /* If this is an INSERT on a view with an INSTEAD OF INSERT trigger,
- ** do not attempt any conversions before assembling the record.
- ** If this is a real table, attempt conversions as required by the
- ** table column affinities.
- */
- if( !isView ){
- sqlite3TableAffinityStr(v, pTab);
- }
- sqlite3VdbeAddOp(v, OP_PutIntKey, newIdx, 0);
-
- /* Fire BEFORE or INSTEAD OF triggers */
- if( sqlite3CodeRowTrigger(pParse, TK_INSERT, 0, TK_BEFORE, pTab,
- newIdx, -1, onError, endOfLoop) ){
- goto insert_cleanup;
- }
- }
-
- /* If any triggers exists, the opening of tables and indices is deferred
- ** until now.
- */
- if( row_triggers_exist && !isView ){
- base = pParse->nTab;
- sqlite3OpenTableAndIndices(pParse, pTab, base, OP_OpenWrite);
- }
-
- /* Push the record number for the new entry onto the stack. The
- ** record number is a randomly generate integer created by NewRecno
- ** except when the table has an INTEGER PRIMARY KEY column, in which
- ** case the record number is the same as that column.
- */
- if( !isView ){
- if( keyColumn>=0 ){
- if( useTempTable ){
- sqlite3VdbeAddOp(v, OP_Column, srcTab, keyColumn);
- }else if( pSelect ){
- sqlite3VdbeAddOp(v, OP_Dup, nColumn - keyColumn - 1, 1);
- }else{
- sqlite3ExprCode(pParse, pList->a[keyColumn].pExpr);
- }
- /* If the PRIMARY KEY expression is NULL, then use OP_NewRecno
- ** to generate a unique primary key value.
- */
- sqlite3VdbeAddOp(v, OP_NotNull, -1, sqlite3VdbeCurrentAddr(v)+3);
- sqlite3VdbeAddOp(v, OP_Pop, 1, 0);
- sqlite3VdbeAddOp(v, OP_NewRecno, base, 0);
- sqlite3VdbeAddOp(v, OP_MustBeInt, 0, 0);
- }else{
- sqlite3VdbeAddOp(v, OP_NewRecno, base, 0);
- }
-
- /* Push onto the stack, data for all columns of the new entry, beginning
- ** with the first column.
- */
- for(i=0; i<pTab->nCol; i++){
- if( i==pTab->iPKey ){
- /* The value of the INTEGER PRIMARY KEY column is always a NULL.
- ** Whenever this column is read, the record number will be substituted
- ** in its place. So will fill this column with a NULL to avoid
- ** taking up data space with information that will never be used. */
- sqlite3VdbeAddOp(v, OP_String8, 0, 0);
- continue;
- }
- if( pColumn==0 ){
- j = i;
- }else{
- for(j=0; j<pColumn->nId; j++){
- if( pColumn->a[j].idx==i ) break;
- }
- }
- if( pColumn && j>=pColumn->nId ){
- sqlite3VdbeOp3(v, OP_String8, 0, 0, pTab->aCol[i].zDflt, P3_STATIC);
- }else if( useTempTable ){
- sqlite3VdbeAddOp(v, OP_Column, srcTab, j);
- }else if( pSelect ){
- sqlite3VdbeAddOp(v, OP_Dup, i+nColumn-j, 1);
- }else{
- sqlite3ExprCode(pParse, pList->a[j].pExpr);
- }
- }
-
- /* Generate code to check constraints and generate index keys and
- ** do the insertion.
- */
- sqlite3GenerateConstraintChecks(pParse, pTab, base, 0, keyColumn>=0,
- 0, onError, endOfLoop);
- sqlite3CompleteInsertion(pParse, pTab, base, 0,0,0,
- after_triggers ? newIdx : -1);
- }
-
- /* Update the count of rows that are inserted
- */
- if( (db->flags & SQLITE_CountRows)!=0 ){
- sqlite3VdbeAddOp(v, OP_MemIncr, iCntMem, 0);
- }
-
- if( row_triggers_exist ){
- /* Close all tables opened */
- if( !isView ){
- sqlite3VdbeAddOp(v, OP_Close, base, 0);
- for(idx=1, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, idx++){
- sqlite3VdbeAddOp(v, OP_Close, idx+base, 0);
- }
- }
-
- /* Code AFTER triggers */
- if( sqlite3CodeRowTrigger(pParse, TK_INSERT, 0, TK_AFTER, pTab, newIdx, -1,
- onError, endOfLoop) ){
- goto insert_cleanup;
- }
- }
-
- /* The bottom of the loop, if the data source is a SELECT statement
- */
- sqlite3VdbeResolveLabel(v, endOfLoop);
- if( useTempTable ){
- sqlite3VdbeAddOp(v, OP_Next, srcTab, iCont);
- sqlite3VdbeResolveLabel(v, iBreak);
- sqlite3VdbeAddOp(v, OP_Close, srcTab, 0);
- }else if( pSelect ){
- sqlite3VdbeAddOp(v, OP_Pop, nColumn, 0);
- sqlite3VdbeAddOp(v, OP_Return, 0, 0);
- sqlite3VdbeResolveLabel(v, iCleanup);
- }
-
- if( !row_triggers_exist ){
- /* Close all tables opened */
- sqlite3VdbeAddOp(v, OP_Close, base, 0);
- for(idx=1, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, idx++){
- sqlite3VdbeAddOp(v, OP_Close, idx+base, 0);
- }
- }
-
- /*
- ** Return the number of rows inserted.
- */
- if( db->flags & SQLITE_CountRows ){
- sqlite3VdbeAddOp(v, OP_MemLoad, iCntMem, 0);
- sqlite3VdbeAddOp(v, OP_Callback, 1, 0);
- sqlite3VdbeSetNumCols(v, 1);
- sqlite3VdbeSetColName(v, 0, "rows inserted", P3_STATIC);
- }
-
-insert_cleanup:
- sqlite3SrcListDelete(pTabList);
- if( pList ) sqlite3ExprListDelete(pList);
- if( pSelect ) sqlite3SelectDelete(pSelect);
- sqlite3IdListDelete(pColumn);
-}
-
-/*
-** Generate code to do a constraint check prior to an INSERT or an UPDATE.
-**
-** When this routine is called, the stack contains (from bottom to top)
-** the following values:
-**
-** 1. The recno of the row to be updated before the update. This
-** value is omitted unless we are doing an UPDATE that involves a
-** change to the record number.
-**
-** 2. The recno of the row after the update.
-**
-** 3. The data in the first column of the entry after the update.
-**
-** i. Data from middle columns...
-**
-** N. The data in the last column of the entry after the update.
-**
-** The old recno shown as entry (1) above is omitted unless both isUpdate
-** and recnoChng are 1. isUpdate is true for UPDATEs and false for
-** INSERTs and recnoChng is true if the record number is being changed.
-**
-** The code generated by this routine pushes additional entries onto
-** the stack which are the keys for new index entries for the new record.
-** The order of index keys is the same as the order of the indices on
-** the pTable->pIndex list. A key is only created for index i if
-** aIdxUsed!=0 and aIdxUsed[i]!=0.
-**
-** This routine also generates code to check constraints. NOT NULL,
-** CHECK, and UNIQUE constraints are all checked. If a constraint fails,
-** then the appropriate action is performed. There are five possible
-** actions: ROLLBACK, ABORT, FAIL, REPLACE, and IGNORE.
-**
-** Constraint type Action What Happens
-** --------------- ---------- ----------------------------------------
-** any ROLLBACK The current transaction is rolled back and
-** sqlite3_exec() returns immediately with a
-** return code of SQLITE_CONSTRAINT.
-**
-** any ABORT Back out changes from the current command
-** only (do not do a complete rollback) then
-** cause sqlite3_exec() to return immediately
-** with SQLITE_CONSTRAINT.
-**
-** any FAIL Sqlite_exec() returns immediately with a
-** return code of SQLITE_CONSTRAINT. The
-** transaction is not rolled back and any
-** prior changes are retained.
-**
-** any IGNORE The record number and data is popped from
-** the stack and there is an immediate jump
-** to label ignoreDest.
-**
-** NOT NULL REPLACE The NULL value is replace by the default
-** value for that column. If the default value
-** is NULL, the action is the same as ABORT.
-**
-** UNIQUE REPLACE The other row that conflicts with the row
-** being inserted is removed.
-**
-** CHECK REPLACE Illegal. The results in an exception.
-**
-** Which action to take is determined by the overrideError parameter.
-** Or if overrideError==OE_Default, then the pParse->onError parameter
-** is used. Or if pParse->onError==OE_Default then the onError value
-** for the constraint is used.
-**
-** The calling routine must open a read/write cursor for pTab with
-** cursor number "base". All indices of pTab must also have open
-** read/write cursors with cursor number base+i for the i-th cursor.
-** Except, if there is no possibility of a REPLACE action then
-** cursors do not need to be open for indices where aIdxUsed[i]==0.
-**
-** If the isUpdate flag is true, it means that the "base" cursor is
-** initially pointing to an entry that is being updated. The isUpdate
-** flag causes extra code to be generated so that the "base" cursor
-** is still pointing at the same entry after the routine returns.
-** Without the isUpdate flag, the "base" cursor might be moved.
-*/
-void sqlite3GenerateConstraintChecks(
- Parse *pParse, /* The parser context */
- Table *pTab, /* the table into which we are inserting */
- int base, /* Index of a read/write cursor pointing at pTab */
- char *aIdxUsed, /* Which indices are used. NULL means all are used */
- int recnoChng, /* True if the record number will change */
- int isUpdate, /* True for UPDATE, False for INSERT */
- int overrideError, /* Override onError to this if not OE_Default */
- int ignoreDest /* Jump to this label on an OE_Ignore resolution */
-){
- int i;
- Vdbe *v;
- int nCol;
- int onError;
- int addr;
- int extra;
- int iCur;
- Index *pIdx;
- int seenReplace = 0;
- int jumpInst1=0, jumpInst2;
- int contAddr;
- int hasTwoRecnos = (isUpdate && recnoChng);
-
- v = sqlite3GetVdbe(pParse);
- assert( v!=0 );
- assert( pTab->pSelect==0 ); /* This table is not a VIEW */
- nCol = pTab->nCol;
-
- /* Test all NOT NULL constraints.
- */
- for(i=0; i<nCol; i++){
- if( i==pTab->iPKey ){
- continue;
- }
- onError = pTab->aCol[i].notNull;
- if( onError==OE_None ) continue;
- if( overrideError!=OE_Default ){
- onError = overrideError;
- }else if( onError==OE_Default ){
- onError = OE_Abort;
- }
- if( onError==OE_Replace && pTab->aCol[i].zDflt==0 ){
- onError = OE_Abort;
- }
- sqlite3VdbeAddOp(v, OP_Dup, nCol-1-i, 1);
- addr = sqlite3VdbeAddOp(v, OP_NotNull, 1, 0);
- switch( onError ){
- case OE_Rollback:
- case OE_Abort:
- case OE_Fail: {
- char *zMsg = 0;
- sqlite3VdbeAddOp(v, OP_Halt, SQLITE_CONSTRAINT, onError);
- sqlite3SetString(&zMsg, pTab->zName, ".", pTab->aCol[i].zName,
- " may not be NULL", (char*)0);
- sqlite3VdbeChangeP3(v, -1, zMsg, P3_DYNAMIC);
- break;
- }
- case OE_Ignore: {
- sqlite3VdbeAddOp(v, OP_Pop, nCol+1+hasTwoRecnos, 0);
- sqlite3VdbeAddOp(v, OP_Goto, 0, ignoreDest);
- break;
- }
- case OE_Replace: {
- sqlite3VdbeOp3(v, OP_String8, 0, 0, pTab->aCol[i].zDflt, P3_STATIC);
- sqlite3VdbeAddOp(v, OP_Push, nCol-i, 0);
- break;
- }
- default: assert(0);
- }
- sqlite3VdbeChangeP2(v, addr, sqlite3VdbeCurrentAddr(v));
- }
-
- /* Test all CHECK constraints
- */
- /**** TBD ****/
-
- /* If we have an INTEGER PRIMARY KEY, make sure the primary key
- ** of the new record does not previously exist. Except, if this
- ** is an UPDATE and the primary key is not changing, that is OK.
- */
- if( recnoChng ){
- onError = pTab->keyConf;
- if( overrideError!=OE_Default ){
- onError = overrideError;
- }else if( onError==OE_Default ){
- onError = OE_Abort;
- }
-
- if( isUpdate ){
- sqlite3VdbeAddOp(v, OP_Dup, nCol+1, 1);
- sqlite3VdbeAddOp(v, OP_Dup, nCol+1, 1);
- jumpInst1 = sqlite3VdbeAddOp(v, OP_Eq, 0, 0);
- }
- sqlite3VdbeAddOp(v, OP_Dup, nCol, 1);
- jumpInst2 = sqlite3VdbeAddOp(v, OP_NotExists, base, 0);
- switch( onError ){
- default: {
- onError = OE_Abort;
- /* Fall thru into the next case */
- }
- case OE_Rollback:
- case OE_Abort:
- case OE_Fail: {
- sqlite3VdbeOp3(v, OP_Halt, SQLITE_CONSTRAINT, onError,
- "PRIMARY KEY must be unique", P3_STATIC);
- break;
- }
- case OE_Replace: {
- sqlite3GenerateRowIndexDelete(pParse->db, v, pTab, base, 0);
- if( isUpdate ){
- sqlite3VdbeAddOp(v, OP_Dup, nCol+hasTwoRecnos, 1);
- sqlite3VdbeAddOp(v, OP_MoveGe, base, 0);
- }
- seenReplace = 1;
- break;
- }
- case OE_Ignore: {
- assert( seenReplace==0 );
- sqlite3VdbeAddOp(v, OP_Pop, nCol+1+hasTwoRecnos, 0);
- sqlite3VdbeAddOp(v, OP_Goto, 0, ignoreDest);
- break;
- }
- }
- contAddr = sqlite3VdbeCurrentAddr(v);
- sqlite3VdbeChangeP2(v, jumpInst2, contAddr);
- if( isUpdate ){
- sqlite3VdbeChangeP2(v, jumpInst1, contAddr);
- sqlite3VdbeAddOp(v, OP_Dup, nCol+1, 1);
- sqlite3VdbeAddOp(v, OP_MoveGe, base, 0);
- }
- }
-
- /* Test all UNIQUE constraints by creating entries for each UNIQUE
- ** index and making sure that duplicate entries do not already exist.
- ** Add the new records to the indices as we go.
- */
- extra = -1;
- for(iCur=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, iCur++){
- if( aIdxUsed && aIdxUsed[iCur]==0 ) continue; /* Skip unused indices */
- extra++;
-
- /* Create a key for accessing the index entry */
- sqlite3VdbeAddOp(v, OP_Dup, nCol+extra, 1);
- for(i=0; i<pIdx->nColumn; i++){
- int idx = pIdx->aiColumn[i];
- if( idx==pTab->iPKey ){
- sqlite3VdbeAddOp(v, OP_Dup, i+extra+nCol+1, 1);
- }else{
- sqlite3VdbeAddOp(v, OP_Dup, i+extra+nCol-idx, 1);
- }
- }
- jumpInst1 = sqlite3VdbeAddOp(v, OP_MakeRecord, pIdx->nColumn, (1<<24));
- sqlite3IndexAffinityStr(v, pIdx);
-
- /* Find out what action to take in case there is an indexing conflict */
- onError = pIdx->onError;
- if( onError==OE_None ) continue; /* pIdx is not a UNIQUE index */
- if( overrideError!=OE_Default ){
- onError = overrideError;
- }else if( onError==OE_Default ){
- onError = OE_Abort;
- }
- if( seenReplace ){
- if( onError==OE_Ignore ) onError = OE_Replace;
- else if( onError==OE_Fail ) onError = OE_Abort;
- }
-
-
- /* Check to see if the new index entry will be unique */
- sqlite3VdbeAddOp(v, OP_Dup, extra+nCol+1+hasTwoRecnos, 1);
- jumpInst2 = sqlite3VdbeAddOp(v, OP_IsUnique, base+iCur+1, 0);
-
- /* Generate code that executes if the new index entry is not unique */
- switch( onError ){
- case OE_Rollback:
- case OE_Abort:
- case OE_Fail: {
- int j, n1, n2;
- char zErrMsg[200];
- strcpy(zErrMsg, pIdx->nColumn>1 ? "columns " : "column ");
- n1 = strlen(zErrMsg);
- for(j=0; j<pIdx->nColumn && n1<sizeof(zErrMsg)-30; j++){
- char *zCol = pTab->aCol[pIdx->aiColumn[j]].zName;
- n2 = strlen(zCol);
- if( j>0 ){
- strcpy(&zErrMsg[n1], ", ");
- n1 += 2;
- }
- if( n1+n2>sizeof(zErrMsg)-30 ){
- strcpy(&zErrMsg[n1], "...");
- n1 += 3;
- break;
- }else{
- strcpy(&zErrMsg[n1], zCol);
- n1 += n2;
- }
- }
- strcpy(&zErrMsg[n1],
- pIdx->nColumn>1 ? " are not unique" : " is not unique");
- sqlite3VdbeOp3(v, OP_Halt, SQLITE_CONSTRAINT, onError, zErrMsg, 0);
- break;
- }
- case OE_Ignore: {
- assert( seenReplace==0 );
- sqlite3VdbeAddOp(v, OP_Pop, nCol+extra+3+hasTwoRecnos, 0);
- sqlite3VdbeAddOp(v, OP_Goto, 0, ignoreDest);
- break;
- }
- case OE_Replace: {
- sqlite3GenerateRowDelete(pParse->db, v, pTab, base, 0);
- if( isUpdate ){
- sqlite3VdbeAddOp(v, OP_Dup, nCol+extra+1+hasTwoRecnos, 1);
- sqlite3VdbeAddOp(v, OP_MoveGe, base, 0);
- }
- seenReplace = 1;
- break;
- }
- default: assert(0);
- }
- contAddr = sqlite3VdbeCurrentAddr(v);
- assert( contAddr<(1<<24) );
-#if NULL_DISTINCT_FOR_UNIQUE
- sqlite3VdbeChangeP2(v, jumpInst1, contAddr | (1<<24));
-#endif
- sqlite3VdbeChangeP2(v, jumpInst2, contAddr);
- }
-}
-
-/*
-** This routine generates code to finish the INSERT or UPDATE operation
-** that was started by a prior call to sqlite3GenerateConstraintChecks.
-** The stack must contain keys for all active indices followed by data
-** and the recno for the new entry. This routine creates the new
-** entries in all indices and in the main table.
-**
-** The arguments to this routine should be the same as the first six
-** arguments to sqlite3GenerateConstraintChecks.
-*/
-void sqlite3CompleteInsertion(
- Parse *pParse, /* The parser context */
- Table *pTab, /* the table into which we are inserting */
- int base, /* Index of a read/write cursor pointing at pTab */
- char *aIdxUsed, /* Which indices are used. NULL means all are used */
- int recnoChng, /* True if the record number will change */
- int isUpdate, /* True for UPDATE, False for INSERT */
- int newIdx /* Index of NEW table for triggers. -1 if none */
-){
- int i;
- Vdbe *v;
- int nIdx;
- Index *pIdx;
- int pik_flags;
-
- v = sqlite3GetVdbe(pParse);
- assert( v!=0 );
- assert( pTab->pSelect==0 ); /* This table is not a VIEW */
- for(nIdx=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, nIdx++){}
- for(i=nIdx-1; i>=0; i--){
- if( aIdxUsed && aIdxUsed[i]==0 ) continue;
- sqlite3VdbeAddOp(v, OP_IdxPut, base+i+1, 0);
- }
- sqlite3VdbeAddOp(v, OP_MakeRecord, pTab->nCol, 0);
- sqlite3TableAffinityStr(v, pTab);
- if( newIdx>=0 ){
- sqlite3VdbeAddOp(v, OP_Dup, 1, 0);
- sqlite3VdbeAddOp(v, OP_Dup, 1, 0);
- sqlite3VdbeAddOp(v, OP_PutIntKey, newIdx, 0);
- }
- pik_flags = (OPFLAG_NCHANGE|(isUpdate?0:OPFLAG_LASTROWID));
- sqlite3VdbeAddOp(v, OP_PutIntKey, base, pik_flags);
-
- if( isUpdate && recnoChng ){
- sqlite3VdbeAddOp(v, OP_Pop, 1, 0);
- }
-}
-
-/*
-** Generate code that will open cursors for a table and for all
-** indices of that table. The "base" parameter is the cursor number used
-** for the table. Indices are opened on subsequent cursors.
-*/
-void sqlite3OpenTableAndIndices(
- Parse *pParse, /* Parsing context */
- Table *pTab, /* Table to be opened */
- int base, /* Cursor number assigned to the table */
- int op /* OP_OpenRead or OP_OpenWrite */
-){
- int i;
- Index *pIdx;
- Vdbe *v = sqlite3GetVdbe(pParse);
- assert( v!=0 );
- sqlite3VdbeAddOp(v, OP_Integer, pTab->iDb, 0);
- sqlite3VdbeAddOp(v, op, base, pTab->tnum);
- VdbeComment((v, "# %s", pTab->zName));
- sqlite3VdbeAddOp(v, OP_SetNumColumns, base, pTab->nCol);
- for(i=1, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, i++){
- sqlite3VdbeAddOp(v, OP_Integer, pIdx->iDb, 0);
- sqlite3VdbeOp3(v, op, i+base, pIdx->tnum,
- (char*)&pIdx->keyInfo, P3_KEYINFO);
- }
- if( pParse->nTab<=base+i ){
- pParse->nTab = base+i;
- }
-}