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Parse and save foreign key constraints

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When parsing a CREATE TABLE statement read and try to parse any foreign
key constraints and save that information.
This commit is contained in:
Martin Kleusberg
2014-11-06 18:28:28 +01:00
parent fca39e9e1c
commit f2c3c2b1a4
2 changed files with 30 additions and 0 deletions
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27
src/sqlitetypes.cpp
View File

@@ -190,6 +190,14 @@ QString Table::sql() const
if(pks_found)
sql += pk + ")";
}
// foreign keys
foreach(FieldPtr f, m_fields)
{
if(!f->foreignKey().isEmpty())
sql += QString(",\n\tFOREIGN KEY(`%1`) REFERENCES %2").arg(f->name()).arg(f->foreignKey());
}
sql += "\n)";
// without rowid
@@ -345,6 +353,25 @@ Table CreateTableWalker::table()
}
}
break;
case sqlite3TokenTypes::FOREIGN:
{
tc = tc->getNextSibling(); // FOREIGN
tc = tc->getNextSibling(); // KEY
tc = tc->getNextSibling(); // LPAREN
QString column_name = identifier(tc);
tc = tc->getNextSibling(); // identifier
if(tc->getType() == sqlite3TokenTypes::COMMA)
{
// No support for composite foreign keys
m_bModifySupported = false;
break;
}
tc = tc->getNextSibling(); // RPAREN
tc = tc->getNextSibling(); // REFERENCES
tab.fields().at(tab.findField(column_name))->setForeignKey(concatTextAST(tc, true));
}
break;
default:
{
m_bModifySupported = false;

3
src/sqlitetypes.h
View File

@@ -42,6 +42,7 @@ public:
void setAutoIncrement(bool autoinc) { m_autoincrement = autoinc; }
void setPrimaryKey(bool pk) { m_primaryKey = pk; }
void setUnique(bool u) { m_unique = u; }
void setForeignKey(const QString& key) { m_foreignKey = key; }
bool isText() const;
bool isInteger() const;
@@ -54,6 +55,7 @@ public:
bool autoIncrement() const { return m_autoincrement; }
bool primaryKey() const { return m_primaryKey; }
bool unique() const { return m_unique; }
const QString& foreignKey() const { return m_foreignKey; }
static QStringList Datatypes;
private:
@@ -62,6 +64,7 @@ private:
bool m_notnull;
QString m_check;
QString m_defaultvalue;
QString m_foreignKey; // Even though this information is a table constraint easier for accessing and processing to store it here
bool m_autoincrement; //! this is stored here for simplification
bool m_primaryKey;
bool m_unique;