1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
|
#include "columngeneratedpanel.h"
#include "ui_columngeneratedpanel.h"
#include "parser/parser.h"
#include "parser/keywords.h"
#include "parser/lexer.h"
#include "uiutils.h"
#include "schemaresolver.h"
#include <QDebug>
ColumnGeneratedPanel::ColumnGeneratedPanel(QWidget *parent) :
ConstraintPanel(parent),
ui(new Ui::ColumnGeneratedPanel)
{
ui->setupUi(this);
init();
}
ColumnGeneratedPanel::~ColumnGeneratedPanel()
{
delete ui;
}
void ColumnGeneratedPanel::changeEvent(QEvent *e)
{
QWidget::changeEvent(e);
switch (e->type()) {
case QEvent::LanguageChange:
ui->retranslateUi(this);
break;
default:
break;
}
}
bool ColumnGeneratedPanel::validate()
{
if (!ui->exprEdit->isSyntaxChecked())
{
setValidState(ui->exprEdit, false, tr("Enter the column value generating expression."));
return false;
}
// First check if we already validated this text.
// This method is called twice, by both errors checking and syntax highlighting,
// because signal for textChange() is connected with call to updateValidation().
QString text = ui->exprEdit->toPlainText();
if (!lastValidatedText.isNull() && lastValidatedText == text)
return lastValidationResult;
lastValidatedText = text;
bool nameOk = true;
if (ui->namedCheck->isChecked() && ui->namedEdit->text().isEmpty())
nameOk = false;
bool exprOk = !ui->exprEdit->toPlainText().trimmed().isEmpty() &&
!ui->exprEdit->haveErrors();
QString exprError;
if (exprOk)
{
// Everything looks fine, so lets do the final check - if the value is correct for use as generated column expression in SQLite.
static QString tempDdlExprTpl = QStringLiteral("CREATE TEMP TABLE %1 (aaa, %2 GENERATED ALWAYS AS (%3));");
static QString dropTempDdl = QStringLiteral("DROP TABLE %1;");
SqliteCreateTable::Column* columnStmt = dynamic_cast<SqliteCreateTable::Column*>(constraint->parentStatement());
SqliteCreateTable* createTableStmt = dynamic_cast<SqliteCreateTable*>(columnStmt->parentStatement());
QStringList preparedColNames;
QString thisColumnName = columnStmt->name;
for (SqliteCreateTable::Column* column : createTableStmt->columns)
{
if (column->name == thisColumnName)
continue;
preparedColNames << wrapObjIfNeeded(column->name);
}
preparedColNames << wrapObjIfNeeded(thisColumnName);
QString tableName = getTempTable();
QString tempDdl = tempDdlExprTpl.arg(tableName, preparedColNames.join(", "), ui->exprEdit->toPlainText());
SqlQueryPtr res = db->exec(tempDdl);
if (res->isError())
{
exprOk = false;
exprError = tr("Invalid value generating expression: %1.")
.arg(res->getErrorText());
}
db->exec(dropTempDdl.arg(tableName));
} else
exprError = tr("Invalid value generating expression.");
setValidState(ui->exprEdit, exprOk, exprError);
setValidState(ui->namedEdit, nameOk, tr("Enter a name of the constraint."));
lastValidationResult = (exprOk && nameOk);
return lastValidationResult;
}
bool ColumnGeneratedPanel::validateOnly()
{
ui->exprEdit->checkSyntaxNow();
return validate();
}
void ColumnGeneratedPanel::constraintAvailable()
{
if (constraint.isNull())
return;
readConstraint();
updateVirtualSql();
validateOnly();
}
void ColumnGeneratedPanel::storeConfiguration()
{
if (constraint.isNull())
return;
SqliteCreateTable::Column::Constraint* constr = dynamic_cast<SqliteCreateTable::Column::Constraint*>(constraint.data());
constr->type = SqliteCreateTable::Column::Constraint::GENERATED;
storeExpr(constr);
if (ui->typeCheck->isChecked())
constr->generatedType = SqliteCreateTable::Column::Constraint::generatedTypeFrom(ui->typeCombo->currentText());
else
constr->generatedType = SqliteCreateTable::Column::Constraint::GeneratedType::null;
constr->generatedKw = ui->generatedKwCheck->isChecked();
if (ui->namedCheck->isChecked())
constr->name = ui->namedEdit->text();
}
void ColumnGeneratedPanel::storeExpr(SqliteCreateTable::Column::Constraint* constr)
{
QString text = ui->exprEdit->toPlainText();
clear(constr);
Parser parser;
SqliteExpr* newExpr = parser.parseExpr(text);
newExpr->setParent(constraint.data());
constr->expr = newExpr;
}
void ColumnGeneratedPanel::clear(SqliteCreateTable::Column::Constraint* constr)
{
if (constr->expr)
{
delete constr->expr;
constr->expr = nullptr;
}
constr->generatedKw = false;
constr->generatedType = SqliteCreateTable::Column::Constraint::GeneratedType::null;
}
void ColumnGeneratedPanel::init()
{
setFocusProxy(ui->exprEdit);
ui->exprEdit->setShowLineNumbers(false);
connect(ui->namedCheck, SIGNAL(toggled(bool)), this, SIGNAL(updateValidation()));
connect(ui->namedEdit, SIGNAL(textChanged(QString)), this, SIGNAL(updateValidation()));
connect(ui->exprEdit, SIGNAL(textChanged()), this, SIGNAL(updateValidation()));
connect(ui->exprEdit, SIGNAL(errorsChecked(bool)), this, SIGNAL(updateValidation()));
connect(ui->namedCheck, SIGNAL(toggled(bool)), this, SLOT(updateState()));
connect(ui->typeCheck, SIGNAL(toggled(bool)), this, SLOT(updateState()));
ui->typeCombo->addItems(getGeneratedColumnTypes());
updateState();
}
void ColumnGeneratedPanel::readConstraint()
{
SqliteCreateTable::Column::Constraint* constr = dynamic_cast<SqliteCreateTable::Column::Constraint*>(constraint.data());
constr->rebuildTokens();
if (constr->expr)
ui->exprEdit->setPlainText(constr->expr->detokenize());
QString typeValue = SqliteCreateTable::Column::Constraint::toString(constr->generatedType);
switch (constr->generatedType) {
case SqliteCreateTable::Column::Constraint::GeneratedType::STORED:
ui->typeCheck->setChecked(true);
break;
case SqliteCreateTable::Column::Constraint::GeneratedType::VIRTUAL:
ui->typeCheck->setChecked(true);
break;
case SqliteCreateTable::Column::Constraint::GeneratedType::null:
ui->typeCheck->setChecked(false);
typeValue = SqliteCreateTable::Column::Constraint::toString(SqliteCreateTable::Column::Constraint::GeneratedType::VIRTUAL);
break;
}
ui->typeCombo->setCurrentText(typeValue);
ui->generatedKwCheck->setChecked(constr->generatedKw);
if (!constr->name.isNull())
{
ui->namedCheck->setChecked(true);
ui->namedEdit->setText(constr->name);
}
}
void ColumnGeneratedPanel::updateVirtualSql()
{
static QString sql = QStringLiteral("CREATE TABLE tab (col GENERATED ALWAYS AS (%1))");
ui->exprEdit->setDb(db);
ui->exprEdit->setVirtualSqlExpression(sql);
}
QString ColumnGeneratedPanel::getTempTable()
{
SchemaResolver resolver(db);
return resolver.getUniqueName("sqlitestudio_temp_table");
}
void ColumnGeneratedPanel::updateState()
{
ui->namedEdit->setEnabled(ui->namedCheck->isChecked());
ui->typeCombo->setEnabled(ui->typeCheck->isChecked());
}
|
