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koffice/kexi/kexidb/queryschema.cpp

1860 lines
57 KiB

/* This file is part of the KDE project
Copyright (C) 2003-2007 Jaroslaw Staniek <js@iidea.pl>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "kexidb/queryschema.h"
#include "kexidb/driver.h"
#include "kexidb/connection.h"
#include "kexidb/expression.h"
#include "kexidb/parser/sqlparser.h"
#include "utils.h"
#include "lookupfieldschema.h"
#include <assert.h>
#include <tqvaluelist.h>
#include <tqasciidict.h>
#include <tqptrdict.h>
#include <tqintdict.h>
#include <tqbitarray.h>
#include <kdebug.h>
#include <klocale.h>
using namespace KexiDB;
QueryColumnInfo::QueryColumnInfo(Field *f, const TQCString& _alias, bool _visible,
QueryColumnInfo *foreignColumn)
: field(f), alias(_alias), visible(_visible), m_indexForVisibleLookupValue(-1)
, m_foreignColumn(foreignColumn)
{
}
QueryColumnInfo::~QueryColumnInfo()
{
}
TQString QueryColumnInfo::debugString() const
{
return field->name() +
( alias.isEmpty() ? TQString()
: (TQString::tqfromLatin1(" AS ") + TQString(alias)) );
}
//=======================================
namespace KexiDB {
//! @internal
class QuerySchemaPrivate
{
public:
QuerySchemaPrivate(QuerySchema* q, QuerySchemaPrivate* copy = 0)
: query(q)
, masterTable(0)
, fakeRowIDField(0)
, fakeRowIDCol(0)
, maxIndexWithAlias(-1)
, visibility(64)
, fieldsExpanded(0)
, internalFields(0)
, fieldsExpandedWithInternalAndRowID(0)
, fieldsExpandedWithInternal(0)
, autoincFields(0)
, columnsOrder(0)
, columnsOrderWithoutAsterisks(0)
, columnsOrderExpanded(0)
, pkeyFieldsOrder(0)
, pkeyFieldsCount(0)
, tablesBoundToColumns(64, -1)
, tablePositionsForAliases(67, false)
, columnPositionsForAliases(67, false)
, whereExpr(0)
, ownedVisibleColumns(0)
, regenerateExprAliases(false)
{
columnAliases.setAutoDelete(true);
tableAliases.setAutoDelete(true);
asterisks.setAutoDelete(true);
relations.setAutoDelete(true);
tablePositionsForAliases.setAutoDelete(true);
columnPositionsForAliases.setAutoDelete(true);
visibility.fill(false);
if (copy) {
// deep copy
*this = *copy;
if (copy->fieldsExpanded)
fieldsExpanded = new QueryColumnInfo::Vector(*copy->fieldsExpanded);
if (copy->internalFields)
internalFields = new QueryColumnInfo::Vector(*copy->internalFields);
if (copy->fieldsExpandedWithInternalAndRowID)
fieldsExpandedWithInternalAndRowID = new QueryColumnInfo::Vector(
*copy->fieldsExpandedWithInternalAndRowID);
if (copy->fieldsExpandedWithInternal)
fieldsExpandedWithInternal = new QueryColumnInfo::Vector(
*copy->fieldsExpandedWithInternal);
if (copy->autoincFields)
autoincFields = new QueryColumnInfo::List(*copy->autoincFields);
if (copy->columnsOrder)
columnsOrder = new TQMap<QueryColumnInfo*,int>(*copy->columnsOrder);
if (copy->columnsOrderWithoutAsterisks)
columnsOrderWithoutAsterisks = new TQMap<QueryColumnInfo*,int>(
*copy->columnsOrderWithoutAsterisks);
if (copy->columnsOrderExpanded)
columnsOrderExpanded = new TQMap<QueryColumnInfo*,int>(*copy->columnsOrderExpanded);
if (copy->pkeyFieldsOrder)
pkeyFieldsOrder = new TQValueVector<int>(*copy->pkeyFieldsOrder);
if (copy->whereExpr)
whereExpr = copy->whereExpr->copy();
if (copy->fakeRowIDCol)
fakeRowIDCol = new QueryColumnInfo(*copy->fakeRowIDCol);
if (copy->fakeRowIDField)
fakeRowIDField = new Field(*copy->fakeRowIDField);
if (copy->ownedVisibleColumns)
ownedVisibleColumns = new Field::List(*copy->ownedVisibleColumns);
}
}
~QuerySchemaPrivate()
{
delete fieldsExpanded;
delete internalFields;
delete fieldsExpandedWithInternalAndRowID;
delete fieldsExpandedWithInternal;
delete autoincFields;
delete columnsOrder;
delete columnsOrderWithoutAsterisks;
delete columnsOrderExpanded;
delete pkeyFieldsOrder;
delete whereExpr;
delete fakeRowIDCol;
delete fakeRowIDField;
delete ownedVisibleColumns;
}
void clear()
{
columnAliases.clear();
tableAliases.clear();
asterisks.clear();
relations.clear();
masterTable = 0;
tables.clear();
clearCachedData();
delete pkeyFieldsOrder;
pkeyFieldsOrder=0;
visibility.fill(false);
tablesBoundToColumns = TQValueVector<int>(64,-1);
tablePositionsForAliases.clear();
columnPositionsForAliases.clear();
}
void clearCachedData()
{
orderByColumnList.clear();
if (fieldsExpanded) {
delete fieldsExpanded;
fieldsExpanded = 0;
delete internalFields;
internalFields = 0;
delete columnsOrder;
columnsOrder = 0;
delete columnsOrderWithoutAsterisks;
columnsOrderWithoutAsterisks = 0;
delete columnsOrderExpanded;
columnsOrderExpanded = 0;
delete autoincFields;
autoincFields = 0;
autoIncrementSQLFieldsList = TQString();
columnInfosByNameExpanded.clear();
columnInfosByName.clear();
delete ownedVisibleColumns;
ownedVisibleColumns = 0;
}
}
void setColumnAliasInternal(uint position, const TQCString& alias)
{
columnAliases.replace(position, new TQCString(alias));
columnPositionsForAliases.replace(alias, new int(position));
maxIndexWithAlias = TQMAX( maxIndexWithAlias, (int)position );
}
void setColumnAlias(uint position, const TQCString& alias)
{
TQCString *oldAlias = columnAliases.take(position);
if (oldAlias) {
tablePositionsForAliases.remove(*oldAlias);
delete oldAlias;
}
if (alias.isEmpty()) {
maxIndexWithAlias = -1;
}
else {
setColumnAliasInternal(position, alias);
}
}
bool hasColumnAliases()
{
tryRegenerateExprAliases();
return !columnAliases.isEmpty();
}
TQCString* columnAlias(uint position)
{
tryRegenerateExprAliases();
return columnAliases[position];
}
QuerySchema *query;
/*! Master table of the query. (may be NULL)
Any data modifications can be performed if we know master table.
If null, query's records cannot be modified. */
TableSchema *masterTable;
/*! List of tables used in this query */
TableSchema::List tables;
Field *fakeRowIDField; //! used to mark a place for ROWID
QueryColumnInfo *fakeRowIDCol; //! used to mark a place for ROWID
protected:
void tryRegenerateExprAliases()
{
if (!regenerateExprAliases)
return;
//regenerate missing aliases for experessions
Field *f;
uint p=0;
uint colNum=0; //used to generate a name
TQCString columnAlias;
for (Field::ListIterator it(query->fieldsIterator()); (f = it.current()); ++it, p++) {
if (f->isExpression() && !columnAliases[p]) {
//missing
for (;;) { //find 1st unused
colNum++;
columnAlias = (i18n("short for 'expression' word (only latin letters, please)", "expr")
+ TQString::number(colNum)).latin1();
if (!tablePositionsForAliases[columnAlias])
break;
}
setColumnAliasInternal(p, columnAlias);
}
}
regenerateExprAliases = false;
}
/*! Used to mapping columns to its aliases for this query */
TQIntDict<TQCString> columnAliases;
public:
/*! Used to mapping tables to its aliases for this query */
TQIntDict<TQCString> tableAliases;
/*! Helper used with aliases */
int maxIndexWithAlias;
/*! Helper used with tableAliases */
int maxIndexWithTableAlias;
/*! Used to store visibility flag for every field */
TQBitArray visibility;
/*! List of asterisks defined for this query */
Field::List asterisks;
/*! Temporary field vector for using in fieldsExpanded() */
// Field::Vector *fieldsExpanded;
QueryColumnInfo::Vector *fieldsExpanded;
/*! Temporary field vector containing internal fields used for lookup columns. */
QueryColumnInfo::Vector *internalFields;
/*! Temporary, used to cache sum of expanded fields and internal fields (+rowid) used for lookup columns.
Contains not auto-deleted items.*/
QueryColumnInfo::Vector *fieldsExpandedWithInternalAndRowID;
/*! Temporary, used to cache sum of expanded fields and internal fields used for lookup columns.
Contains not auto-deleted items.*/
QueryColumnInfo::Vector *fieldsExpandedWithInternal;
/*! A list of fields for ORDER BY section. @see QuerySchema::orderByColumnList(). */
OrderByColumnList orderByColumnList;
/*! A cache for autoIncrementFields(). */
QueryColumnInfo::List *autoincFields;
/*! A cache for autoIncrementSQLFieldsList(). */
TQString autoIncrementSQLFieldsList;
TQGuardedPtr<Driver> lastUsedDriverForAutoIncrementSQLFieldsList;
/*! A map for fast lookup of query columns' order (unexpanded version). */
TQMap<QueryColumnInfo*,int> *columnsOrder;
/*! A map for fast lookup of query columns' order (unexpanded version without asterisks). */
TQMap<QueryColumnInfo*,int> *columnsOrderWithoutAsterisks;
/*! A map for fast lookup of query columns' order.
This is exactly opposite information compared to vector returned
by fieldsExpanded() */
TQMap<QueryColumnInfo*,int> *columnsOrderExpanded;
// TQValueList<bool> detailedVisibility;
/*! order of PKEY fields (e.g. for updateRow() ) */
TQValueVector<int> *pkeyFieldsOrder;
/*! number of PKEY fields within the query */
uint pkeyFieldsCount;
/*! forced (predefined) statement */
TQString statement;
/*! Relationships defined for this query. */
Relationship::List relations;
/*! Information about columns bound to tables.
Used a table is used in FROM section more than once
(using table aliases).
This list is updated by insertField(uint position, Field *field,
int bindToTable, bool visible), using bindToTable parameter.
Example: for this statement:
SELECT t1.a, othertable.x, t2.b FROM table t1, table t2, othertable;
tablesBoundToColumns list looks like this:
[ 0, -1, 1 ]
- first column is bound to table 0 "t1"
- second coulmn is not specially bound (othertable.x isn't ambiguous)
- third column is bound to table 1 "t2"
*/
TQValueVector<int> tablesBoundToColumns;
/*! Collects table positions for aliases: used in tablePositionForAlias(). */
TQAsciiDict<int> tablePositionsForAliases;
/*! Collects column positions for aliases: used in columnPositionForAlias(). */
TQAsciiDict<int> columnPositionsForAliases;
/*! WHERE expression */
BaseExpr *whereExpr;
TQDict<QueryColumnInfo> columnInfosByNameExpanded;
TQDict<QueryColumnInfo> columnInfosByName; //!< Same as columnInfosByNameExpanded but asterisks are skipped
//! field schemas created for multiple joined columns like a||' '||b||' '||c
Field::List *ownedVisibleColumns;
/*! Set by insertField(): true, if aliases for expression columns should
be generated on next columnAlias() call. */
bool regenerateExprAliases : 1;
};
}
//=======================================
OrderByColumn::OrderByColumn()
: m_column(0)
, m_pos(-1)
, m_field(0)
, m_ascending(true)
{
}
OrderByColumn::OrderByColumn(QueryColumnInfo& column, bool ascending, int pos)
: m_column(&column)
, m_pos(pos)
, m_field(0)
, m_ascending(ascending)
{
}
OrderByColumn::OrderByColumn(Field& field, bool ascending)
: m_column(0)
, m_pos(-1)
, m_field(&field)
, m_ascending(ascending)
{
}
OrderByColumn::~OrderByColumn()
{
}
TQString OrderByColumn::debugString() const
{
TQString orderString( m_ascending ? "ascending" : "descending" );
if (m_column) {
if (m_pos>-1)
return TQString("COLUMN_AT_POSITION_%1(%2, %3)")
.tqarg(m_pos+1).tqarg(m_column->debugString()).tqarg(orderString);
else
return TQString("COLUMN(%1, %2)").tqarg(m_column->debugString()).tqarg(orderString);
}
return m_field ? TQString("FIELD(%1, %2)").tqarg(m_field->debugString()).tqarg(orderString)
: TQString("NONE");
}
TQString OrderByColumn::toSQLString(bool includeTableName, Driver *drv, int identifierEscaping) const
{
const TQString orderString( m_ascending ? "" : " DESC" );
TQString fieldName, tableName;
if (m_column) {
if (m_pos>-1)
return TQString::number(m_pos+1) + orderString;
else {
if (includeTableName && m_column->alias.isEmpty()) {
tableName = m_column->field->table()->name();
if (drv)
tableName = drv->escapeIdentifier(tableName, identifierEscaping);
tableName += ".";
}
fieldName = m_column->aliasOrName();
if (drv)
fieldName = drv->escapeIdentifier(fieldName, identifierEscaping);
}
}
else {
if (includeTableName) {
tableName = m_field->table()->name();
if (drv)
tableName = drv->escapeIdentifier(tableName, identifierEscaping);
tableName += ".";
}
fieldName = m_field ? m_field->name() : "??"/*error*/;
if (drv)
fieldName = drv->escapeIdentifier(fieldName, identifierEscaping);
}
return tableName + fieldName + orderString;
}
//=======================================
OrderByColumnList::OrderByColumnList()
: OrderByColumnListBase()
{
}
bool OrderByColumnList::appendFields(QuerySchema& querySchema,
const TQString& field1, bool ascending1,
const TQString& field2, bool ascending2,
const TQString& field3, bool ascending3,
const TQString& field4, bool ascending4,
const TQString& field5, bool ascending5)
{
uint numAdded = 0;
#define ADD_COL(fieldName, ascending) \
if (ok && !fieldName.isEmpty()) { \
if (!appendField( querySchema, fieldName, ascending )) \
ok = false; \
else \
numAdded++; \
}
bool ok = true;
ADD_COL(field1, ascending1);
ADD_COL(field2, ascending2);
ADD_COL(field3, ascending3);
ADD_COL(field4, ascending4);
ADD_COL(field5, ascending5);
#undef ADD_COL
if (ok)
return true;
for (uint i=0; i<numAdded; i++)
pop_back();
return false;
}
OrderByColumnList::~OrderByColumnList()
{
}
void OrderByColumnList::appendColumn(QueryColumnInfo& columnInfo, bool ascending)
{
appendColumn( OrderByColumn(columnInfo, ascending) );
}
bool OrderByColumnList::appendColumn(QuerySchema& querySchema, bool ascending, int pos)
{
QueryColumnInfo::Vector fieldsExpanded( querySchema.fieldsExpanded() );
QueryColumnInfo* ci = (pos >= (int)fieldsExpanded.size()) ? 0 : fieldsExpanded[pos];
if (!ci)
return false;
appendColumn( OrderByColumn(*ci, ascending, pos) );
return true;
}
void OrderByColumnList::appendField(Field& field, bool ascending)
{
appendColumn( OrderByColumn(field, ascending) );
}
bool OrderByColumnList::appendField(QuerySchema& querySchema,
const TQString& fieldName, bool ascending)
{
QueryColumnInfo *columnInfo = querySchema.columnInfo( fieldName );
if (columnInfo) {
appendColumn( OrderByColumn(*columnInfo, ascending) );
return true;
}
Field *field = querySchema.findTableField(fieldName);
if (field) {
appendColumn( OrderByColumn(*field, ascending) );
return true;
}
KexiDBWarn << "OrderByColumnList::addColumn(QuerySchema& querySchema, "
"const TQString& column, bool ascending): no such field \"" << fieldName << "\"" << endl;
return false;
}
void OrderByColumnList::appendColumn(const OrderByColumn& column)
{
append( column );
}
TQString OrderByColumnList::debugString() const
{
if (isEmpty())
return "NONE";
TQString dbg;
for (OrderByColumn::ListConstIterator it=constBegin(); it!=constEnd(); ++it) {
if (!dbg.isEmpty())
dbg += "\n";
dbg += (*it).debugString();
}
return dbg;
}
TQString OrderByColumnList::toSQLString(bool includeTableNames, Driver *drv, int identifierEscaping) const
{
TQString string;
for (OrderByColumn::ListConstIterator it=constBegin(); it!=constEnd(); ++it) {
if (!string.isEmpty())
string += ", ";
string += (*it).toSQLString(includeTableNames, drv, identifierEscaping);
}
return string;
}
//=======================================
QuerySchema::QuerySchema()
: FieldList(false)//fields are not owned by QuerySchema object
, SchemaData(KexiDB::QueryObjectType)
, d( new QuerySchemaPrivate(this) )
{
init();
}
QuerySchema::QuerySchema(TableSchema& tableSchema)
: FieldList(false)
, SchemaData(KexiDB::QueryObjectType)
, d( new QuerySchemaPrivate(this) )
{
d->masterTable = &tableSchema;
init();
/* if (!d->masterTable) {
KexiDBWarn << "QuerySchema(TableSchema*): !d->masterTable" << endl;
m_name = TQString();
return;
}*/
addTable(d->masterTable);
//defaults:
//inherit name from a table
m_name = d->masterTable->name();
//inherit caption from a table
m_caption = d->masterTable->caption();
//replaced by explicit field list: //add all fields of the table as asterisk:
//replaced by explicit field list: addField( new QueryAsterisk(this) );
// add explicit field list to avoid problems (e.g. with fields added outside of Kexi):
for (Field::ListIterator it( d->masterTable->fieldsIterator() ); it.current(); ++it) {
addField( it.current() );
}
}
QuerySchema::QuerySchema(const QuerySchema& querySchema)
: FieldList(querySchema, false /* !deepCopyFields */)
, SchemaData(querySchema)
, d( new QuerySchemaPrivate(this, querySchema.d) )
{
//only deep copy query asterisks
for (Field::ListIterator f_it(querySchema.m_fields); f_it.current(); ++f_it) {
Field *f;
if (dynamic_cast<QueryAsterisk*>( f_it.current() )) {
f = f_it.current()->copy();
if (static_cast<const KexiDB::FieldList *>(f_it.current()->m_parent) == &querySchema)
f->m_parent = this;
}
else
f = f_it.current();
addField( f );
}
}
QuerySchema::~QuerySchema()
{
delete d;
}
void QuerySchema::init()
{
m_type = KexiDB::QueryObjectType;
//m_fields_by_name.setAutoDelete( true ); //because we're using QueryColumnInfoEntry objects
}
void QuerySchema::clear()
{
FieldList::clear();
SchemaData::clear();
d->clear();
}
FieldList& QuerySchema::insertField(uint position, Field *field, bool visible)
{
return insertField(position, field, -1/*don't bind*/, visible);
}
/*virtual*/
FieldList& QuerySchema::insertField(uint position, Field *field)
{
return insertField( position, field, -1/*don't bind*/, true );
}
FieldList& QuerySchema::insertField(uint position, Field *field,
int bindToTable, bool visible)
{
if (!field) {
KexiDBWarn << "QuerySchema::insertField(): !field" << endl;
return *this;
}
if (position>m_fields.count()) {
KexiDBWarn << "QuerySchema::insertField(): position (" << position << ") out of range" << endl;
return *this;
}
if (!field->isQueryAsterisk() && !field->isExpression() && !field->table()) {
KexiDBWarn << "QuerySchema::insertField(): WARNING: field '"<<field->name()
<<"' must contain table information!" <<endl;
return *this;
}
if (fieldCount()>=d->visibility.size()) {
d->visibility.resize(d->visibility.size()*2);
d->tablesBoundToColumns.resize(d->tablesBoundToColumns.size()*2);
}
d->clearCachedData();
FieldList::insertField(position, field);
if (field->isQueryAsterisk()) {
d->asterisks.append(field);
//if this is single-table asterisk,
//add a table to list if doesn't exist there:
if (field->table() && (d->tables.findRef(field->table())==-1))
d->tables.append(field->table());
}
else if (field->table()) {
//add a table to list if doesn't exist there:
if (d->tables.findRef(field->table())==-1)
d->tables.append(field->table());
}
// //visible by default
// setFieldVisible(field, true);
// d->visibility.setBit(fieldCount()-1, visible);
//update visibility
//--move bits to make a place for a new one
for (uint i=fieldCount()-1; i>position; i--)
d->visibility.setBit(i, d->visibility.testBit(i-1));
d->visibility.setBit(position, visible);
//bind to table
if (bindToTable < -1 && bindToTable>(int)d->tables.count()) {
KexiDBWarn << "QuerySchema::insertField(): bindToTable (" << bindToTable
<< ") out of range" << endl;
bindToTable = -1;
}
//--move items to make a place for a new one
for (uint i=fieldCount()-1; i>position; i--)
d->tablesBoundToColumns[i] = d->tablesBoundToColumns[i-1];
d->tablesBoundToColumns[ position ] = bindToTable;
KexiDBDbg << "QuerySchema::insertField(): bound to table (" << bindToTable << "): " <<endl;
if (bindToTable==-1)
KexiDBDbg << " <NOT SPECIFIED>" << endl;
else
KexiDBDbg << " name=" << d->tables.at(bindToTable)->name()
<< " alias=" << tableAlias(bindToTable) << endl;
TQString s;
for (uint i=0; i<fieldCount();i++)
s+= (TQString::number(d->tablesBoundToColumns[i]) + " ");
KexiDBDbg << "tablesBoundToColumns == [" << s << "]" <<endl;
if (field->isExpression())
d->regenerateExprAliases = true;
return *this;
}
int QuerySchema::tableBoundToColumn(uint columnPosition) const
{
if (columnPosition > d->tablesBoundToColumns.count()) {
KexiDBWarn << "QuerySchema::tableBoundToColumn(): columnPosition (" << columnPosition
<< ") out of range" << endl;
return -1;
}
return d->tablesBoundToColumns[columnPosition];
}
KexiDB::FieldList& QuerySchema::addField(KexiDB::Field* field, bool visible)
{
return insertField(m_fields.count(), field, visible);
}
KexiDB::FieldList& QuerySchema::addField(KexiDB::Field* field, int bindToTable,
bool visible)
{
return insertField(m_fields.count(), field, bindToTable, visible);
}
void QuerySchema::removeField(KexiDB::Field *field)
{
if (!field)
return;
d->clearCachedData();
if (field->isQueryAsterisk()) {
d->asterisks.remove(field); //this will destroy this asterisk
}
//TODO: should we also remove table for this field or asterisk?
FieldList::removeField(field);
}
FieldList& QuerySchema::addExpression(BaseExpr* expr, bool visible)
{
return addField( new Field(this, expr), visible );
}
bool QuerySchema::isColumnVisible(uint position) const
{
return (position < fieldCount()) ? d->visibility.testBit(position) : false;
}
void QuerySchema::setColumnVisible(uint position, bool v)
{
if (position < fieldCount())
d->visibility.setBit(position, v);
}
FieldList& QuerySchema::addAsterisk(QueryAsterisk *asterisk, bool visible)
{
if (!asterisk)
return *this;
//make unique name
asterisk->m_name = (asterisk->table() ? asterisk->table()->name() + ".*" : "*")
+ TQString::number(asterisks()->count());
return addField(asterisk, visible);
}
Connection* QuerySchema::connection() const
{
TableSchema *mt = masterTable();
return mt ? mt->connection() : 0;
}
TQString QuerySchema::debugString()
{
TQString dbg;
dbg.reserve(1024);
//fields
TableSchema *mt = masterTable();
dbg = TQString("TQUERY ") + schemaDataDebugString() + "\n"
+ "-masterTable=" + (mt ? mt->name() :"<NULL>")
+ "\n-COLUMNS:\n"
+ ((fieldCount()>0) ? FieldList::debugString() : "<NONE>") + "\n"
+ "-FIELDS EXPANDED ";
TQString dbg1;
uint fieldsExpandedCount = 0;
if (fieldCount()>0) {
QueryColumnInfo::Vector fe( fieldsExpanded() );
fieldsExpandedCount = fe.size();
for ( uint i=0; i < fieldsExpandedCount; i++ ) {
QueryColumnInfo *ci = fe[i];
if (!dbg1.isEmpty())
dbg1 += ",\n";
dbg1 += ci->debugString();
}
dbg1 += "\n";
}
else {
dbg1 = "<NONE>\n";
}
dbg1.prepend( TQString("(%1):\n").tqarg(fieldsExpandedCount) );
dbg += dbg1;
//it's safer to delete fieldsExpanded for now
// (debugString() could be called before all fields are added)
//causes a crash d->clearCachedData();
//bindings
TQString dbg2;
dbg2.reserve(512);
for (uint i = 0; i<fieldCount(); i++) {
int tablePos = tableBoundToColumn(i);
if (tablePos>=0) {
TQCString tAlias = tableAlias(tablePos);
if (!tAlias.isEmpty()) {
dbg2 += (TQString::tqfromLatin1(" field \"") + FieldList::field(i)->name()
+ "\" uses alias \"" + TQString(tAlias) + "\" of table \""
+ d->tables.at(tablePos)->name() + "\"\n");
}
}
}
if (!dbg2.isEmpty()) {
dbg += "\n-BINDINGS:\n";
dbg += dbg2;
}
//tables
TableSchema *table;
TQString table_names;
table_names.reserve(512);
for ( table = d->tables.first(); table; table = d->tables.next() ) {
if (!table_names.isEmpty())
table_names += ", ";
table_names += (TQString("'") + table->name() + "'");
}
if (d->tables.isEmpty())
table_names = "<NONE>";
dbg += (TQString("-TABLES:\n") + table_names);
TQString aliases;
if (!d->hasColumnAliases())
aliases = "<NONE>\n";
else {
Field::ListIterator it( m_fields );
for (int i=0; it.current(); ++it, i++) {
TQCString *alias = d->columnAlias(i);
if (alias)
aliases += (TQString("field #%1: ").tqarg(i)
+ (it.current()->name().isEmpty() ? "<noname>" : it.current()->name())
+ " -> " + (const char*)*alias + "\n");
}
}
//aliases
dbg += TQString("\n-COLUMN ALIASES:\n" + aliases);
if (d->tableAliases.isEmpty())
aliases = "<NONE>";
else {
aliases = "";
TableSchema::ListIterator t_it(d->tables);
for (int i=0; t_it.current(); ++t_it, i++) {
TQCString *alias = d->tableAliases[i];
if (alias)
aliases += (TQString("table #%1: ").tqarg(i)
+ (t_it.current()->name().isEmpty() ? "<noname>" : t_it.current()->name())
+ " -> " + (const char*)*alias + "\n");
}
}
dbg += TQString("-TABLE ALIASES:\n" + aliases);
TQString where = d->whereExpr ? d->whereExpr->debugString() : TQString();
if (!where.isEmpty())
dbg += (TQString("\n-WHERE EXPRESSION:\n") + where);
if (!orderByColumnList().isEmpty())
dbg += (TQString("\n-ORDER BY (%1):\n").tqarg(orderByColumnList().count())
+ orderByColumnList().debugString());
return dbg;
}
TableSchema* QuerySchema::masterTable() const
{
if (d->masterTable)
return d->masterTable;
if (d->tables.isEmpty())
return 0;
//try to find master table if there's only one table (with possible aliasses)
int num = 0;
TQString tableNameLower;
for (TableSchema::ListIterator it(d->tables); it.current(); ++it, num++) {
if (!tableNameLower.isEmpty() && it.current()->name().lower()!=tableNameLower) {
//two or more different tables
return 0;
}
tableNameLower = tableAlias(num);
}
return d->tables.first();
}
void QuerySchema::setMasterTable(TableSchema *table)
{
if (table)
d->masterTable=table;
}
TableSchema::List* QuerySchema::tables() const
{
return &d->tables;
}
void QuerySchema::addTable(TableSchema *table, const TQCString& alias)
{
KexiDBDbg << "QuerySchema::addTable() " << (void *)table
<< " alias=" << alias << endl;
if (!table)
return;
//only append table if:
//-it has alias
//-it has no alias but there is no such table on the list
if (alias.isEmpty() && d->tables.findRef(table)!=-1) {
const TQString& tableNameLower = table->name().lower();
const TQString& aliasLower = TQString(alias.lower());
int num = 0;
for (TableSchema::ListIterator it(d->tables); it.current(); ++it, num++) {
if (it.current()->name().lower()==tableNameLower) {
const TQString& tAlias = tableAlias(num);
if (tAlias == aliasLower) {
KexiDBWarn << "QuerySchema::addTable(): table with \""
<< tAlias << "\" alias already added!" << endl;
return;
}
}
}
}
d->tables.append(table);
if (!alias.isEmpty())
setTableAlias(d->tables.count()-1, alias);
}
void QuerySchema::removeTable(TableSchema *table)
{
if (!table)
return;
if (d->masterTable == table)
d->masterTable = 0;
d->tables.remove(table);
//todo: remove fields!
}
TableSchema* QuerySchema::table(const TQString& tableName) const
{
//TODO: maybe use tables_byname?
for (TableSchema::ListIterator it(d->tables); it.current(); ++it) {
if (it.current()->name().lower()==tableName.lower())
return it.current();
}
return 0;
}
bool QuerySchema::contains(TableSchema *table) const
{
return d->tables.findRef(table)!=-1;
}
Field* QuerySchema::findTableField(const TQString &tableOrTableAndFieldName) const
{
TQString tableName, fieldName;
if (!KexiDB::splitToTableAndFieldParts(tableOrTableAndFieldName,
tableName, fieldName, KexiDB::SetFieldNameIfNoTableName)) {
return 0;
}
if (tableName.isEmpty()) {
for (TableSchema::ListIterator it(d->tables); it.current(); ++it) {
if (it.current()->field(fieldName))
return it.current()->field(fieldName);
}
return 0;
}
TableSchema *tableSchema = table(tableName);
if (!tableSchema)
return 0;
return tableSchema->field(fieldName);
}
TQCString QuerySchema::columnAlias(uint position) const
{
TQCString *a = d->columnAlias(position);
return a ? *a : TQCString();
}
bool QuerySchema::hasColumnAlias(uint position) const
{
return d->columnAlias(position)!=0;
}
void QuerySchema::setColumnAlias(uint position, const TQCString& alias)
{
if (position >= m_fields.count()) {
KexiDBWarn << "QuerySchema::setColumnAlias(): position (" << position
<< ") out of range!" << endl;
return;
}
TQCString fixedAlias = alias.stripWhiteSpace();
Field *f = FieldList::field(position);
if (f->captionOrName().isEmpty() && fixedAlias.isEmpty()) {
KexiDBWarn << "QuerySchema::setColumnAlias(): position (" << position
<< ") could not remove alias when no name is specified for expression column!" << endl;
return;
}
d->setColumnAlias(position, fixedAlias);
}
TQCString QuerySchema::tableAlias(uint position) const
{
TQCString *a = d->tableAliases[position];
return a ? *a : TQCString();
}
int QuerySchema::tablePositionForAlias(const TQCString& name) const
{
int *num = d->tablePositionsForAliases[name];
if (!num)
return -1;
return *num;
}
int QuerySchema::tablePosition(const TQString& tableName) const
{
int num = 0;
for (TableSchema::ListIterator it(d->tables); it.current(); ++it, num++) {
if (it.current()->name().lower()==tableName.lower())
return num;
}
return -1;
}
TQValueList<int> QuerySchema::tablePositions(const TQString& tableName) const
{
int num = 0;
TQValueList<int> result;
const TQString& tableNameLower = tableName.lower();
for (TableSchema::ListIterator it(d->tables); it.current(); ++it, num++) {
if (it.current()->name().lower()==tableNameLower) {
result += num;
}
}
return result;
}
bool QuerySchema::hasTableAlias(uint position) const
{
return d->tableAliases[position]!=0;
}
int QuerySchema::columnPositionForAlias(const TQCString& name) const
{
int *num = d->columnPositionsForAliases[name];
if (!num)
return -1;
return *num;
}
void QuerySchema::setTableAlias(uint position, const TQCString& alias)
{
if (position >= d->tables.count()) {
KexiDBWarn << "QuerySchema::setTableAlias(): position (" << position
<< ") out of range!" << endl;
return;
}
TQCString fixedAlias = alias.stripWhiteSpace();
if (fixedAlias.isEmpty()) {
TQCString *oldAlias = d->tableAliases.take(position);
if (oldAlias) {
d->tablePositionsForAliases.remove(*oldAlias);
delete oldAlias;
}
// d->maxIndexWithTableAlias = -1;
}
else {
d->tableAliases.replace(position, new TQCString(fixedAlias));
d->tablePositionsForAliases.replace(fixedAlias, new int(position));
// d->maxIndexWithTableAlias = TQMAX( d->maxIndexWithTableAlias, (int)index );
}
}
Relationship::List* QuerySchema::relationships() const
{
return &d->relations;
}
Field::List* QuerySchema::asterisks() const
{
return &d->asterisks;
}
TQString QuerySchema::statement() const
{
return d->statement;
}
void QuerySchema::setStatement(const TQString &s)
{
d->statement = s;
}
Field* QuerySchema::field(const TQString& identifier, bool expanded)
{
QueryColumnInfo *ci = columnInfo(identifier, expanded);
return ci ? ci->field : 0;
}
QueryColumnInfo* QuerySchema::columnInfo(const TQString& identifier, bool expanded)
{
computeFieldsExpanded();
return expanded ? d->columnInfosByNameExpanded[identifier] : d->columnInfosByName[identifier];
}
QueryColumnInfo::Vector QuerySchema::fieldsExpanded(FieldsExpandedOptions options)
{
computeFieldsExpanded();
if (options == WithInternalFields || options == WithInternalFieldsAndRowID) {
//a ref to a proper pointer (as we cache the vector for two cases)
QueryColumnInfo::Vector*& tmpFieldsExpandedWithInternal =
(options == WithInternalFields) ? d->fieldsExpandedWithInternal : d->fieldsExpandedWithInternalAndRowID;
//special case
if (!tmpFieldsExpandedWithInternal) {
//glue expanded and internal fields and cache it
const uint size = d->fieldsExpanded->count()
+ (d->internalFields ? d->internalFields->count() : 0)
+ ((options == WithInternalFieldsAndRowID) ? 1 : 0) /*ROWID*/;
tmpFieldsExpandedWithInternal = new QueryColumnInfo::Vector( size );
const uint fieldsExpandedVectorSize = d->fieldsExpanded->size();
for (uint i=0; i<fieldsExpandedVectorSize; i++)
tmpFieldsExpandedWithInternal->insert(i, d->fieldsExpanded->at(i));
const uint internalFieldsCount = d->internalFields ? d->internalFields->size() : 0;
if (internalFieldsCount > 0) {
for (uint i=0; i < internalFieldsCount; i++)
tmpFieldsExpandedWithInternal->insert(
fieldsExpandedVectorSize + i, d->internalFields->at(i));
}
if (options == WithInternalFieldsAndRowID) {
if (!d->fakeRowIDField) {
d->fakeRowIDField = new Field("rowID", Field::BigInteger);
d->fakeRowIDCol = new QueryColumnInfo(d->fakeRowIDField, TQCString(), true);
}
tmpFieldsExpandedWithInternal->insert(
fieldsExpandedVectorSize + internalFieldsCount, d->fakeRowIDCol );
}
}
return *tmpFieldsExpandedWithInternal;
}
if (options == Default)
return *d->fieldsExpanded;
//options == Unique:
TQDict<char> columnsAlreadyFound;
QueryColumnInfo::Vector result( d->fieldsExpanded->count() ); //initial size is set
// TQMapConstIterator<QueryColumnInfo*, bool> columnsAlreadyFoundIt;
//compute unique list
uint uniqueListCount = 0;
for (uint i=0; i<d->fieldsExpanded->count(); i++) {
QueryColumnInfo *ci = (*d->fieldsExpanded)[i];
// columnsAlreadyFoundIt = columnsAlreadyFound.find(ci);
// uint foundColumnIndex = -1;
if (!columnsAlreadyFound[ci->aliasOrName()]) {// columnsAlreadyFoundIt==columnsAlreadyFound.constEnd())
columnsAlreadyFound.insert(ci->aliasOrName(), (char*)1);
result.insert(uniqueListCount++, ci);
}
}
result.resize(uniqueListCount); //update result size
return result;
}
QueryColumnInfo::Vector QuerySchema::internalFields()
{
computeFieldsExpanded();
return d->internalFields ? *d->internalFields : QueryColumnInfo::Vector();
}
QueryColumnInfo* QuerySchema::expandedOrInternalField(uint index)
{
QueryColumnInfo::Vector vector = fieldsExpanded(WithInternalFields);
return (index < vector.size()) ? vector[index] : 0;
}
inline TQString lookupColumnKey(Field *foreignField, Field* field)
{
TQString res;
if (field->table()) // can be 0 for anonymous fields built as joined multiple visible columns
res = field->table()->name() + ".";
return res + field->name() + "_" + foreignField->table()->name() + "." + foreignField->name();
}
void QuerySchema::computeFieldsExpanded()
{
if (d->fieldsExpanded)
return;
if (!d->columnsOrder) {
d->columnsOrder = new TQMap<QueryColumnInfo*,int>();
d->columnsOrderWithoutAsterisks = new TQMap<QueryColumnInfo*,int>();
}
else {
d->columnsOrder->clear();
d->columnsOrderWithoutAsterisks->clear();
}
if (d->ownedVisibleColumns)
d->ownedVisibleColumns->clear();
//collect all fields in a list (not a vector yet, because we do not know its size)
QueryColumnInfo::List list; //temporary
QueryColumnInfo::List lookup_list; //temporary, for collecting additional fields related to lookup fields
TQMap<QueryColumnInfo*, bool> columnInfosOutsideAsterisks; //helper for filling d->columnInfosByName
uint i = 0;
uint fieldPosition = 0;
uint numberOfColumnsWithMultipleVisibleFields = 0; //used to find an unique name for anonymous field
Field *f;
for (Field::ListIterator it = fieldsIterator(); (f = it.current()); ++it, fieldPosition++) {
if (f->isQueryAsterisk()) {
if (static_cast<QueryAsterisk*>(f)->isSingleTableAsterisk()) {
Field::List *ast_fields = static_cast<QueryAsterisk*>(f)->table()->fields();
for (Field *ast_f = ast_fields->first(); ast_f; ast_f=ast_fields->next()) {
// d->detailedVisibility += isFieldVisible(fieldPosition);
QueryColumnInfo *ci = new QueryColumnInfo(ast_f, TQCString()/*no field for asterisk!*/,
isColumnVisible(fieldPosition));
list.append( ci );
KexiDBDbg << "QuerySchema::computeFieldsExpanded(): caching (unexpanded) columns order: "
<< ci->debugString() << " at position " << fieldPosition << endl;
d->columnsOrder->insert(ci, fieldPosition);
// list.append(ast_f);
}
}
else {//all-tables asterisk: iterate through table list
for (TableSchema *table = d->tables.first(); table; table = d->tables.next()) {
//add all fields from this table
Field::List *tab_fields = table->fields();
for (Field *tab_f = tab_fields->first(); tab_f; tab_f = tab_fields->next()) {
//! \todo (js): perhaps not all fields should be appended here
// d->detailedVisibility += isFieldVisible(fieldPosition);
// list.append(tab_f);
QueryColumnInfo *ci = new QueryColumnInfo(tab_f, TQCString()/*no field for asterisk!*/,
isColumnVisible(fieldPosition));
list.append( ci );
KexiDBDbg << "QuerySchema::computeFieldsExpanded(): caching (unexpanded) columns order: "
<< ci->debugString() << " at position " << fieldPosition << endl;
d->columnsOrder->insert(ci, fieldPosition);
}
}
}
}
else {
//a single field
// d->detailedVisibility += isFieldVisible(fieldPosition);
QueryColumnInfo *ci = new QueryColumnInfo(f, columnAlias(fieldPosition), isColumnVisible(fieldPosition));
list.append( ci );
columnInfosOutsideAsterisks.insert( ci, true );
KexiDBDbg << "QuerySchema::computeFieldsExpanded(): caching (unexpanded) column's order: "
<< ci->debugString() << " at position " << fieldPosition << endl;
d->columnsOrder->insert(ci, fieldPosition);
d->columnsOrderWithoutAsterisks->insert(ci, fieldPosition);
//handle lookup field schema
LookupFieldSchema *lookupFieldSchema = f->table() ? f->table()->lookupFieldSchema( *f ) : 0;
if (!lookupFieldSchema || lookupFieldSchema->boundColumn()<0)
continue;
// Lookup field schema found:
// Now we also need to fetch "visible" value from the lookup table, not only the value of binding.
// -> build LEFT OUTER JOIN clause for this purpose (LEFT, not INNER because the binding can be broken)
// "LEFT OUTER JOIN lookupTable ON thisTable.thisField=lookupTable.boundField"
LookupFieldSchema::RowSource& rowSource = lookupFieldSchema->rowSource();
if (rowSource.type() == LookupFieldSchema::RowSource::Table) {
TableSchema *lookupTable = connection()->tableSchema( rowSource.name() );
FieldList* visibleColumns = 0;
Field *boundField = 0;
if (lookupTable
&& (uint)lookupFieldSchema->boundColumn() < lookupTable->fieldCount()
&& (visibleColumns = lookupTable->subList( lookupFieldSchema->visibleColumns() ))
&& (boundField = lookupTable->field( lookupFieldSchema->boundColumn() )))
{
Field *visibleColumn = 0;
// for single visible column, just add it as-is
if (visibleColumns->fieldCount() == 1) {
visibleColumn = visibleColumns->fields()->first();
}
else {
// for multiple visible columns, build an expression column
// (the expression object will be owned by column info)
visibleColumn = new Field();
visibleColumn->setName(
TQString::tqfromLatin1("[multiple_visible_fields_%1]")
.tqarg( ++numberOfColumnsWithMultipleVisibleFields ));
visibleColumn->setExpression(
new ConstExpr(CHARACTER_STRING_LITERAL, TQVariant()/*not important*/));
if (!d->ownedVisibleColumns) {
d->ownedVisibleColumns = new Field::List();
d->ownedVisibleColumns->setAutoDelete(true);
}
d->ownedVisibleColumns->append( visibleColumn ); // remember to delete later
}
lookup_list.append(
new QueryColumnInfo(visibleColumn, TQCString(), true/*visible*/, ci/*foreign*/) );
/*
//add visibleField to the list of SELECTed fields if it is not yes present there
if (!findTableField( visibleField->table()->name()+"."+visibleField->name() )) {
if (!table( visibleField->table()->name() )) {
}
if (!sql.isEmpty())
sql += TQString::tqfromLatin1(", ");
sql += (escapeIdentifier(visibleField->table()->name(), drvEscaping) + "."
+ escapeIdentifier(visibleField->name(), drvEscaping));
}*/
}
delete visibleColumns;
}
else if (rowSource.type() == LookupFieldSchema::RowSource::Query) {
QuerySchema *lookupQuery = connection()->querySchema( rowSource.name() );
if (!lookupQuery)
continue;
const QueryColumnInfo::Vector lookupQueryFieldsExpanded( lookupQuery->fieldsExpanded() );
if ((uint)lookupFieldSchema->boundColumn() >= lookupQueryFieldsExpanded.count())
continue;
QueryColumnInfo *boundColumnInfo = 0;
if (!(boundColumnInfo = lookupQueryFieldsExpanded[ lookupFieldSchema->boundColumn() ]))
continue;
Field *boundField = boundColumnInfo->field;
if (!boundField)
continue;
const TQValueList<uint> visibleColumns( lookupFieldSchema->visibleColumns() );
bool ok = true;
// all indices in visibleColumns should be in [0..lookupQueryFieldsExpanded.size()-1]
foreach (TQValueList<uint>::ConstIterator, visibleColumnsIt, visibleColumns) {
if ((*visibleColumnsIt) >= lookupQueryFieldsExpanded.count()) {
ok = false;
break;
}
}
if (!ok)
continue;
Field *visibleColumn = 0;
// for single visible column, just add it as-is
if (visibleColumns.count() == 1) {
visibleColumn = lookupQueryFieldsExpanded[ visibleColumns.first() ]->field;
}
else {
// for multiple visible columns, build an expression column
// (the expression object will be owned by column info)
visibleColumn = new Field();
visibleColumn->setName(
TQString::tqfromLatin1("[multiple_visible_fields_%1]")
.tqarg( ++numberOfColumnsWithMultipleVisibleFields ));
visibleColumn->setExpression(
new ConstExpr(CHARACTER_STRING_LITERAL, TQVariant()/*not important*/));
if (!d->ownedVisibleColumns) {
d->ownedVisibleColumns = new Field::List();
d->ownedVisibleColumns->setAutoDelete(true);
}
d->ownedVisibleColumns->append( visibleColumn ); // remember to delete later
}
lookup_list.append(
new QueryColumnInfo(visibleColumn, TQCString(), true/*visible*/, ci/*foreign*/) );
/*
//add visibleField to the list of SELECTed fields if it is not yes present there
if (!findTableField( visibleField->table()->name()+"."+visibleField->name() )) {
if (!table( visibleField->table()->name() )) {
}
if (!sql.isEmpty())
sql += TQString::tqfromLatin1(", ");
sql += (escapeIdentifier(visibleField->table()->name(), drvEscaping) + "."
+ escapeIdentifier(visibleField->name(), drvEscaping));
}*/
}
}
}
//prepare clean vector for expanded list, and a map for order information
if (!d->fieldsExpanded) {
d->fieldsExpanded = new QueryColumnInfo::Vector( list.count() );// Field::Vector( list.count() );
d->fieldsExpanded->setAutoDelete(true);
d->columnsOrderExpanded = new TQMap<QueryColumnInfo*,int>();
}
else {//for future:
d->fieldsExpanded->clear();
d->fieldsExpanded->resize( list.count() );
d->columnsOrderExpanded->clear();
}
/*fill (based on prepared 'list' and 'lookup_list'):
-the vector
-the map
-"fields by name" dictionary
*/
d->columnInfosByName.clear();
d->columnInfosByNameExpanded.clear();
i=0;
QueryColumnInfo *ci;
for (QueryColumnInfo::ListIterator it(list); (ci = it.current()); ++it, i++) {
d->fieldsExpanded->insert(i, ci);
d->columnsOrderExpanded->insert(ci, i);
//remember field by name/alias/table.name if there's no such string yet in d->columnInfosByNameExpanded
if (!ci->alias.isEmpty()) {
//store alias and table.alias
if (!d->columnInfosByNameExpanded[ ci->alias ])
d->columnInfosByNameExpanded.insert( ci->alias, ci );
TQString tableAndAlias( ci->alias );
if (ci->field->table())
tableAndAlias.prepend(ci->field->table()->name() + ".");
if (!d->columnInfosByNameExpanded[ tableAndAlias ])
d->columnInfosByNameExpanded.insert( tableAndAlias, ci );
//the same for "unexpanded" list
if (columnInfosOutsideAsterisks.contains(ci)) {
if (!d->columnInfosByName[ ci->alias ])
d->columnInfosByName.insert( ci->alias, ci );
if (!d->columnInfosByName[ tableAndAlias ])
d->columnInfosByName.insert( tableAndAlias, ci );
}
}
else {
//no alias: store name and table.name
if (!d->columnInfosByNameExpanded[ ci->field->name() ])
d->columnInfosByNameExpanded.insert( ci->field->name(), ci );
TQString tableAndName( ci->field->name() );
if (ci->field->table())
tableAndName.prepend(ci->field->table()->name() + ".");
if (!d->columnInfosByNameExpanded[ tableAndName ])
d->columnInfosByNameExpanded.insert( tableAndName, ci );
//the same for "unexpanded" list
if (columnInfosOutsideAsterisks.contains(ci)) {
if (!d->columnInfosByName[ ci->field->name() ])
d->columnInfosByName.insert( ci->field->name(), ci );
if (!d->columnInfosByName[ tableAndName ])
d->columnInfosByName.insert( tableAndName, ci );
}
}
}
//remove duplicates for lookup fields
TQDict<uint> lookup_dict(101); //used to fight duplicates and to update QueryColumnInfo::indexForVisibleLookupValue()
// (a mapping from table.name string to uint* lookupFieldIndex
lookup_dict.setAutoDelete(true);
i=0;
for (QueryColumnInfo::ListIterator it(lookup_list); (ci = it.current());)
{
const TQString key( lookupColumnKey(ci->foreignColumn()->field, ci->field) );
if ( /* not needed columnInfo( tableAndFieldName ) || */
lookup_dict[ key ]) {
// this table.field is already fetched by this query
++it;
lookup_list.removeRef( ci );
}
else {
lookup_dict.replace( key, new uint( i ) );
++it;
i++;
}
}
//create internal expanded list with lookup fields
if (d->internalFields) {
d->internalFields->clear();
d->internalFields->resize( lookup_list.count() );
}
delete d->fieldsExpandedWithInternal; //clear cache
delete d->fieldsExpandedWithInternalAndRowID; //clear cache
d->fieldsExpandedWithInternal = 0;
d->fieldsExpandedWithInternalAndRowID = 0;
if (!lookup_list.isEmpty() && !d->internalFields) {//create on demand
d->internalFields = new QueryColumnInfo::Vector( lookup_list.count() );
d->internalFields->setAutoDelete(true);
}
i=0;
for (QueryColumnInfo::ListIterator it(lookup_list); it.current();i++, ++it)
{
//add it to the internal list
d->internalFields->insert(i, it.current());
d->columnsOrderExpanded->insert(it.current(), list.count()+i);
}
//update QueryColumnInfo::indexForVisibleLookupValue() cache for columns
numberOfColumnsWithMultipleVisibleFields = 0;
for (i=0; i < d->fieldsExpanded->size(); i++) {
QueryColumnInfo* ci = d->fieldsExpanded->at(i);
//! @todo QuerySchema itself will also support lookup fields...
LookupFieldSchema *lookupFieldSchema
= ci->field->table() ? ci->field->table()->lookupFieldSchema( *ci->field ) : 0;
if (!lookupFieldSchema || lookupFieldSchema->boundColumn()<0)
continue;
LookupFieldSchema::RowSource& rowSource = lookupFieldSchema->rowSource();
if (rowSource.type() == LookupFieldSchema::RowSource::Table) {
TableSchema *lookupTable = connection()->tableSchema( rowSource.name() );
FieldList* visibleColumns = 0;
if (lookupTable
&& (uint)lookupFieldSchema->boundColumn() < lookupTable->fieldCount()
&& (visibleColumns = lookupTable->subList( lookupFieldSchema->visibleColumns() )))
{
Field *visibleColumn = 0;
// for single visible column, just add it as-is
if (visibleColumns->fieldCount() == 1)
{
visibleColumn = visibleColumns->fields()->first();
const TQString key( lookupColumnKey(ci->field, visibleColumn) );
uint *index = lookup_dict[ key ];
if (index)
ci->setIndexForVisibleLookupValue( d->fieldsExpanded->size() + *index );
}
else {
const TQString key( TQString::tqfromLatin1("[multiple_visible_fields_%1]_%2.%3")
.tqarg( ++numberOfColumnsWithMultipleVisibleFields )
.tqarg(ci->field->table()->name()).tqarg(ci->field->name()) );
uint *index = lookup_dict[ key ];
if (index)
ci->setIndexForVisibleLookupValue( d->fieldsExpanded->size() + *index );
}
}
delete visibleColumns;
}
else if (rowSource.type() == LookupFieldSchema::RowSource::Query) {
QuerySchema *lookupQuery = connection()->querySchema( rowSource.name() );
if (!lookupQuery)
continue;
const QueryColumnInfo::Vector lookupQueryFieldsExpanded( lookupQuery->fieldsExpanded() );
if ((uint)lookupFieldSchema->boundColumn() >= lookupQueryFieldsExpanded.count())
continue;
QueryColumnInfo *boundColumnInfo = 0;
if (!(boundColumnInfo = lookupQueryFieldsExpanded[ lookupFieldSchema->boundColumn() ]))
continue;
Field *boundField = boundColumnInfo->field;
if (!boundField)
continue;
const TQValueList<uint> visibleColumns( lookupFieldSchema->visibleColumns() );
Field *visibleColumn = 0;
// for single visible column, just add it as-is
if (visibleColumns.count() == 1) {
visibleColumn = lookupQueryFieldsExpanded[ visibleColumns.first() ]->field;
const TQString key( lookupColumnKey(ci->field, visibleColumn) );
uint *index = lookup_dict[ key ];
if (index)
ci->setIndexForVisibleLookupValue( d->fieldsExpanded->size() + *index );
}
else {
const TQString key( TQString::tqfromLatin1("[multiple_visible_fields_%1]_%2.%3")
.tqarg( ++numberOfColumnsWithMultipleVisibleFields )
.tqarg(ci->field->table()->name()).tqarg(ci->field->name()) );
uint *index = lookup_dict[ key ];
if (index)
ci->setIndexForVisibleLookupValue( d->fieldsExpanded->size() + *index );
}
}
else {
KexiDBWarn << "QuerySchema::computeFieldsExpanded(): unsupported row source type "
<< rowSource.typeName() << endl;
}
}
}
TQMap<QueryColumnInfo*,int> QuerySchema::columnsOrder(ColumnsOrderOptions options)
{
if (!d->columnsOrder)
computeFieldsExpanded();
if (options == UnexpandedList)
return *d->columnsOrder;
else if (options == UnexpandedListWithoutAsterisks)
return *d->columnsOrderWithoutAsterisks;
return *d->columnsOrderExpanded;
}
TQValueVector<int> QuerySchema::pkeyFieldsOrder()
{
if (d->pkeyFieldsOrder)
return *d->pkeyFieldsOrder;
TableSchema *tbl = masterTable();
if (!tbl || !tbl->primaryKey())
return TQValueVector<int>();
//get order of PKEY fields (e.g. for rows updating or inserting )
IndexSchema *pkey = tbl->primaryKey();
pkey->debug();
debug();
d->pkeyFieldsOrder = new TQValueVector<int>( pkey->fieldCount(), -1 );
const uint fCount = fieldsExpanded().count();
d->pkeyFieldsCount = 0;
for (uint i = 0; i<fCount; i++) {
QueryColumnInfo *fi = d->fieldsExpanded->at(i);
const int fieldIndex = fi->field->table()==tbl ? pkey->indexOf(fi->field) : -1;
if (fieldIndex!=-1/* field found in PK */
&& d->pkeyFieldsOrder->at(fieldIndex)==-1 /* first time */)
{
KexiDBDbg << "QuerySchema::pkeyFieldsOrder(): FIELD " << fi->field->name()
<< " IS IN PKEY AT POSITION #" << fieldIndex << endl;
// (*d->pkeyFieldsOrder)[j]=i;
(*d->pkeyFieldsOrder)[fieldIndex]=i;
d->pkeyFieldsCount++;
// j++;
}
}
KexiDBDbg << "QuerySchema::pkeyFieldsOrder(): " << d->pkeyFieldsCount
<< " OUT OF " << pkey->fieldCount() << " PKEY'S FIELDS FOUND IN TQUERY " << name() << endl;
return *d->pkeyFieldsOrder;
}
uint QuerySchema::pkeyFieldsCount()
{
(void)pkeyFieldsOrder(); /* rebuild information */
return d->pkeyFieldsCount;
}
Relationship* QuerySchema::addRelationship( Field *field1, Field *field2 )
{
//@todo: find existing global db relationships
Relationship *r = new Relationship(this, field1, field2);
if (r->isEmpty()) {
delete r;
return 0;
}
d->relations.append( r );
return r;
}
QueryColumnInfo::List* QuerySchema::autoIncrementFields()
{
if (!d->autoincFields) {
d->autoincFields = new QueryColumnInfo::List();
}
TableSchema *mt = masterTable();
if (!mt) {
KexiDBWarn << "QuerySchema::autoIncrementFields(): no master table!" << endl;
return d->autoincFields;
}
if (d->autoincFields->isEmpty()) {//no cache
QueryColumnInfo::Vector fexp = fieldsExpanded();
for (int i=0; i<(int)fexp.count(); i++) {
QueryColumnInfo *fi = fexp[i];
if (fi->field->table() == mt && fi->field->isAutoIncrement()) {
d->autoincFields->append( fi );
}
}
}
return d->autoincFields;
}
TQString QuerySchema::sqlColumnsList(QueryColumnInfo::List* infolist, Driver *driver)
{
if (!infolist)
return TQString();
TQString result;
result.reserve(256);
QueryColumnInfo::ListIterator it( *infolist );
bool start = true;
for (; it.current(); ++it) {
if (!start)
result += ",";
else
start = false;
result += driver->escapeIdentifier( it.current()->field->name() );
}
return result;
}
TQString QuerySchema::autoIncrementSQLFieldsList(Driver *driver)
{
if ((Driver *)d->lastUsedDriverForAutoIncrementSQLFieldsList != driver
|| d->autoIncrementSQLFieldsList.isEmpty())
{
d->autoIncrementSQLFieldsList = QuerySchema::sqlColumnsList( autoIncrementFields(), driver );
d->lastUsedDriverForAutoIncrementSQLFieldsList = driver;
}
return d->autoIncrementSQLFieldsList;
}
void QuerySchema::setWhereExpression(BaseExpr *expr)
{
delete d->whereExpr;
d->whereExpr = expr;
}
void QuerySchema::addToWhereExpression(KexiDB::Field *field, const TQVariant& value, int relation)
{
int token;
if (value.isNull())
token = SQL_NULL;
else if (field->isIntegerType()) {
token = INTEGER_CONST;
}
else if (field->isFPNumericType()) {
token = REAL_CONST;
}
else {
token = CHARACTER_STRING_LITERAL;
//! @todo date, time
}
BinaryExpr * newExpr = new BinaryExpr(
KexiDBExpr_Relational,
new ConstExpr( token, value ),
relation,
new VariableExpr((field->table() ? (field->table()->name()+".") : TQString())+field->name())
);
if (d->whereExpr) {
d->whereExpr = new BinaryExpr(
KexiDBExpr_Logical,
d->whereExpr,
AND,
newExpr
);
}
else {
d->whereExpr = newExpr;
}
}
/*
void QuerySchema::addToWhereExpression(KexiDB::Field *field, const TQVariant& value)
switch (value.type()) {
case Int: case UInt: case Bool: case LongLong: case ULongLong:
token = INTEGER_CONST;
break;
case Double:
token = REAL_CONST;
break;
default:
token = CHARACTER_STRING_LITERAL;
}
//! @todo date, time
*/
BaseExpr *QuerySchema::whereExpression() const
{
return d->whereExpr;
}
void QuerySchema::setOrderByColumnList(const OrderByColumnList& list)
{
d->orderByColumnList = list;
// all field names should be found, exit otherwise ..........?
}
OrderByColumnList& QuerySchema::orderByColumnList() const
{
return d->orderByColumnList;
}
QuerySchemaParameterList QuerySchema::parameters()
{
if (!whereExpression())
return QuerySchemaParameterList();
QuerySchemaParameterList params;
whereExpression()->getQueryParameters(params);
return params;
}
/*
new field1, Field *field2
if (!field1 || !field2) {
KexiDBWarn << "QuerySchema::addRelationship(): !masterField || !detailsField" << endl;
return;
}
if (field1->isQueryAsterisk() || field2->isQueryAsterisk()) {
KexiDBWarn << "QuerySchema::addRelationship(): relationship's fields cannot be asterisks" << endl;
return;
}
if (!hasField(field1) && !hasField(field2)) {
KexiDBWarn << "QuerySchema::addRelationship(): fields do not belong to this query" << endl;
return;
}
if (field1->table() == field2->table()) {
KexiDBWarn << "QuerySchema::addRelationship(): fields cannot belong to the same table" << endl;
return;
}
//@todo: check more things: -types
//@todo: find existing global db relationships
Field *masterField = 0, *detailsField = 0;
IndexSchema *masterIndex = 0, *detailsIndex = 0;
if (field1->isPrimaryKey() && field2->isPrimaryKey()) {
//2 primary keys
masterField = field1;
masterIndex = masterField->table()->primaryKey();
detailsField = field2;
detailsIndex = masterField->table()->primaryKey();
}
else if (field1->isPrimaryKey()) {
masterField = field1;
masterIndex = masterField->table()->primaryKey();
detailsField = field2;
//@todo: check if it already exists
detailsIndex = new IndexSchema(detailsField->table());
detailsIndex->addField(detailsField);
detailsIndex->setForeigKey(true);
// detailsField->setForeignKey(true);
}
else if (field2->isPrimaryKey()) {
detailsField = field1;
masterField = field2;
masterIndex = masterField->table()->primaryKey();
//@todo
}
if (!masterIndex || !detailsIndex)
return; //failed
Relationship *rel = new Relationship(masterIndex, detailsIndex);
d->relations.append( rel );
}*/
//---------------------------------------------------
QueryAsterisk::QueryAsterisk( QuerySchema *query, TableSchema *table )
:Field()
,m_table(table)
{
assert(query);
m_parent = query;
setType(Field::Asterisk);
}
QueryAsterisk::~QueryAsterisk()
{
}
Field* QueryAsterisk::copy() const
{
return new QueryAsterisk(*this);
}
void QueryAsterisk::setTable(TableSchema *table)
{
KexiDBDbg << "QueryAsterisk::setTable()" << endl;
m_table=table;
}
TQString QueryAsterisk::debugString() const
{
TQString dbg;
if (isAllTableAsterisk()) {
dbg += "ALL-TABLES ASTERISK (*) ON TABLES(";
TableSchema *table;
TQString table_names;
for (TableSchema::ListIterator it( *query()->tables() ); (table = it.current()); ++it) {
if (!table_names.isEmpty())
table_names += ", ";
table_names += table->name();
}
dbg += (table_names + ")");
}
else {
dbg += ("SINGLE-TABLE ASTERISK (" + table()->name() + ".*)");
}
return dbg;
}