Ensures the column index is valid.

csv.go

@@ -331,8 +331,9 @@ func (s *Stmt) ExportToCSV(nullvalue string, headers bool, w *yacr.Writer) error
 	}
 	s.Select(func(s *Stmt) error {
 		for i := 0; i < s.ColumnCount(); i++ {
-			rb, null := s.ScanRawBytes(i)
-			if null {
+			if rb, null, err := s.ScanRawBytes(i); err != nil {
+				return err
+			} else if null {
 				w.Write([]byte(nullvalue))
 			} else {
 				w.Write(rb)

csv_test.go

@@ -206,17 +206,22 @@ func TestImportAffinity(t *testing.T) {
 	err := db.ImportCSV(r, ic, "", "test")
 	checkNoError(t, err, "error while importing CSV file: %s")
 	err = db.Select("SELECT typeof(t), typeof(i), typeof(r), typeof(b), typeof(n) from test", func(s *Stmt) error {
-		tot, _ := s.ScanText(0)
+		tot, _, err := s.ScanText(0)
+		checkNoError(t, err, "error while scanning: %s")
 		assert.Equal(t, "text", tot)
-		toi, _ := s.ScanText(1)
+		toi, _, err := s.ScanText(1)
+		checkNoError(t, err, "error while scanning: %s")
 		assert.Equal(t, "integer", toi)
-		tor, _ := s.ScanText(2)
+		tor, _, err := s.ScanText(2)
+		checkNoError(t, err, "error while scanning: %s")
 		assert.Equal(t, "real", tor)
-		tob, _ := s.ScanText(3)
+		tob, _, err := s.ScanText(3)
+		checkNoError(t, err, "error while scanning: %s")
 		assert.Equal(t, "text", tob)
-		ton, _ := s.ScanText(4)
+		ton, _, err := s.ScanText(4)
+		checkNoError(t, err, "error while scanning: %s")
 		assert.Equal(t, "integer", ton)
-		return nil
+		return err
 	})
 	checkNoError(t, err, "error while selecting: %s")
 }

driver.go

@@ -229,7 +229,9 @@ func (r *rowsImpl) Next(dest []driver.Value) error {
 		return io.EOF
 	}
 	for i := range dest {
-		dest[i], _ = r.s.s.ScanValue(i, true)
+		if dest[i], _, err = r.s.s.ScanValue(i, true); err != nil {
+			return err
+		}
 		/*if !driver.IsScanValue(dest[i]) {
 			panic("Invalid type returned by ScanValue")
 		}*/

meta.go

@@ -56,8 +56,11 @@ func (c *Conn) Tables(dbName string) ([]string, error) {
 	defer s.finalize()
 	var tables = make([]string, 0, 20)
 	err = s.Select(func(s *Stmt) (err error) {
-		name, _ := s.ScanText(0)
-		tables = append(tables, name)
+		if name, _, err := s.ScanText(0); err != nil {
+			return err
+		} else {
+			tables = append(tables, name)
+		}
 		return
 	})
 	if err != nil {
@@ -84,8 +87,11 @@ func (c *Conn) Views(dbName string) ([]string, error) {
 	defer s.finalize()
 	var views = make([]string, 0, 20)
 	err = s.Select(func(s *Stmt) (err error) {
-		name, _ := s.ScanText(0)
-		views = append(views, name)
+		if name, _, err := s.ScanText(0); err != nil {
+			return err
+		} else {
+			views = append(views, name)
+		}
 		return
 	})
 	if err != nil {
@@ -172,8 +178,11 @@ func (c *Conn) Columns(dbName, table string) ([]Column, error) {
 // If the result column is an expression or subquery, then an empty string is returned.
 // The left-most column is column 0.
 // (See http://www.sqlite.org/c3ref/column_decltype.html)
-func (s *Stmt) ColumnDeclaredType(index int) string {
-	return C.GoString(C.sqlite3_column_decltype(s.stmt, C.int(index)))
+func (s *Stmt) ColumnDeclaredType(index int) (string, error) {
+	if index < 0 || index >= s.ColumnCount() {
+		return "", s.specificError("column index %d out of range [0,%d[.", index, s.ColumnCount())
+	}
+	return C.GoString(C.sqlite3_column_decltype(s.stmt, C.int(index))), nil
 }
 
 // Affinity enumerates SQLite column type affinity
@@ -192,7 +201,13 @@ const (
 // If the result column is an expression or subquery, then None is returned.
 // The left-most column is column 0.
 // (See http://sqlite.org/datatype3.html)
-func (s *Stmt) ColumnTypeAffinity(index int) Affinity {
+func (s *Stmt) ColumnTypeAffinity(index int) (Affinity, error) {
+	if index < 0 || index >= s.ColumnCount() {
+		return None, s.specificError("column index %d out of range [0,%d[.", index, s.ColumnCount())
+	}
+	return s.columnTypeAffinity(index), nil
+}
+func (s *Stmt) columnTypeAffinity(index int) Affinity {
 	if s.affinities == nil {
 		count := s.ColumnCount()
 		s.affinities = make([]Affinity, count)
@@ -201,7 +216,7 @@ func (s *Stmt) ColumnTypeAffinity(index int) Affinity {
 			return affinity
 		}
 	}
-	declType := s.ColumnDeclaredType(index)
+	declType, _ := s.ColumnDeclaredType(index)
 	affinity := typeAffinity(declType)
 	s.affinities[index] = affinity
 	return affinity

meta_extra.go

@@ -46,22 +46,31 @@ func (c *Conn) Column(dbName, tableName, columnName string) (*Column, error) {
 // that is the origin of a particular result column in SELECT statement.
 // The left-most column is column 0.
 // (See http://www.sqlite.org/c3ref/column_database_name.html)
-func (s *Stmt) ColumnDatabaseName(index int) string {
-	return C.GoString(C.sqlite3_column_database_name(s.stmt, C.int(index)))
+func (s *Stmt) ColumnDatabaseName(index int) (string, error) {
+	if index < 0 || index >= s.ColumnCount() {
+		return "", s.specificError("column index %d out of range [0,%d[.", index, s.ColumnCount())
+	}
+	return C.GoString(C.sqlite3_column_database_name(s.stmt, C.int(index))), nil
 }
 
 // ColumnTableName returns the original un-aliased table name
 // that is the origin of a particular result column in SELECT statement.
 // The left-most column is column 0.
 // (See http://www.sqlite.org/c3ref/column_database_name.html)
-func (s *Stmt) ColumnTableName(index int) string {
-	return C.GoString(C.sqlite3_column_table_name(s.stmt, C.int(index)))
+func (s *Stmt) ColumnTableName(index int) (string, error) {
+	if index < 0 || index >= s.ColumnCount() {
+		return "", s.specificError("column index %d out of range [0,%d[.", index, s.ColumnCount())
+	}
+	return C.GoString(C.sqlite3_column_table_name(s.stmt, C.int(index))), nil
 }
 
 // ColumnOriginName returns the original un-aliased table column name
 // that is the origin of a particular result column in SELECT statement.
 // The left-most column is column 0.
 // (See http://www.sqlite.org/c3ref/column_database_name.html)
-func (s *Stmt) ColumnOriginName(index int) string {
-	return C.GoString(C.sqlite3_column_origin_name(s.stmt, C.int(index)))
+func (s *Stmt) ColumnOriginName(index int) (string, error) {
+	if index < 0 || index >= s.ColumnCount() {
+		return "", s.specificError("column index %d out of range [0,%d[.", index, s.ColumnCount())
+	}
+	return C.GoString(C.sqlite3_column_origin_name(s.stmt, C.int(index))), nil
 }

meta_extra_test.go

@@ -40,15 +40,20 @@ func TestColumnMetadata(t *testing.T) {
 	check(err)
 	defer checkFinalize(s, t)
 
-	databaseName := s.ColumnDatabaseName(0)
+	databaseName, err := s.ColumnDatabaseName(0)
+	check(err)
 	assert.Equal(t, "main", databaseName, "database name")
-	tableName := s.ColumnTableName(0)
+	tableName, err := s.ColumnTableName(0)
+	check(err)
 	assert.Equal(t, "sqlite_master", tableName, "table name")
-	originName := s.ColumnOriginName(0)
+	originName, err := s.ColumnOriginName(0)
+	check(err)
 	assert.Equal(t, "name", originName, "origin name")
-	declType := s.ColumnDeclaredType(0)
+	declType, err := s.ColumnDeclaredType(0)
+	check(err)
 	assert.Equal(t, "text", declType, "declared type")
-	affinity := s.ColumnTypeAffinity(0)
+	affinity, err := s.ColumnTypeAffinity(0)
+	check(err)
 	assert.Equal(t, Textual, affinity, "affinity")
 }
 
@@ -63,15 +68,20 @@ func TestColumnMetadataOnView(t *testing.T) {
 	check(err)
 	defer checkFinalize(s, t)
 
-	databaseName := s.ColumnDatabaseName(0)
+	databaseName, err := s.ColumnDatabaseName(0)
+	check(err)
 	assert.Equal(t, "main", databaseName, "database name")
-	tableName := s.ColumnTableName(0)
+	tableName, err := s.ColumnTableName(0)
+	check(err)
 	assert.Equal(t, "test", tableName, "table name")
-	originName := s.ColumnOriginName(0)
+	originName, err := s.ColumnOriginName(0)
+	check(err)
 	assert.Equal(t, "a_string", originName, "origin name")
-	declType := s.ColumnDeclaredType(0)
+	declType, err := s.ColumnDeclaredType(0)
+	check(err)
 	assert.Equal(t, "TEXT", declType, "declared type")
-	affinity := s.ColumnTypeAffinity(0)
+	affinity, err := s.ColumnTypeAffinity(0)
+	check(err)
 	assert.Equal(t, Textual, affinity, "affinity")
 }
 
@@ -85,14 +95,19 @@ func TestColumnMetadataOnExpr(t *testing.T) {
 	check(err)
 	defer checkFinalize(s, t)
 
-	databaseName := s.ColumnDatabaseName(0)
+	databaseName, err := s.ColumnDatabaseName(0)
+	check(err)
 	assert.Equal(t, "", databaseName, "database name")
-	tableName := s.ColumnTableName(0)
+	tableName, err := s.ColumnTableName(0)
+	check(err)
 	assert.Equal(t, "", tableName, "table name")
-	originName := s.ColumnOriginName(0)
+	originName, err := s.ColumnOriginName(0)
+	check(err)
 	assert.Equal(t, "", originName, "origin name")
-	declType := s.ColumnDeclaredType(0)
+	declType, err := s.ColumnDeclaredType(0)
+	check(err)
 	assert.Equal(t, "", declType, "declared type")
-	affinity := s.ColumnTypeAffinity(0)
+	affinity, err := s.ColumnTypeAffinity(0)
+	check(err)
 	assert.Equal(t, None, affinity, "affinity")
 }

meta_test.go

@@ -198,12 +198,24 @@ func TestColumnTypeAffinity(t *testing.T) {
 	checkNoError(t, err, "%s")
 	defer checkFinalize(s, t)
 
-	assert.Equal(t, Integral, s.ColumnTypeAffinity(0), "affinity")
-	assert.Equal(t, Real, s.ColumnTypeAffinity(1), "affinity")
-	assert.Equal(t, Numerical, s.ColumnTypeAffinity(2), "affinity")
-	assert.Equal(t, None, s.ColumnTypeAffinity(3), "affinity")
-	assert.Equal(t, Textual, s.ColumnTypeAffinity(4), "affinity")
-	assert.Equal(t, None, s.ColumnTypeAffinity(5), "affinity")
+	aff, err := s.ColumnTypeAffinity(0)
+	checkNoError(t, err, "%s")
+	assert.Equal(t, Integral, aff, "affinity")
+	aff, err = s.ColumnTypeAffinity(1)
+	checkNoError(t, err, "%s")
+	assert.Equal(t, Real, aff, "affinity")
+	aff, err = s.ColumnTypeAffinity(2)
+	checkNoError(t, err, "%s")
+	assert.Equal(t, Numerical, aff, "affinity")
+	aff, err = s.ColumnTypeAffinity(3)
+	checkNoError(t, err, "%s")
+	assert.Equal(t, None, aff, "affinity")
+	aff, err = s.ColumnTypeAffinity(4)
+	checkNoError(t, err, "%s")
+	assert.Equal(t, Textual, aff, "affinity")
+	aff, err = s.ColumnTypeAffinity(5)
+	checkNoError(t, err, "%s")
+	assert.Equal(t, None, aff, "affinity")
 }
 
 func TestExpressionTypeAffinity(t *testing.T) {
@@ -214,8 +226,16 @@ func TestExpressionTypeAffinity(t *testing.T) {
 	checkNoError(t, err, "%s")
 	defer checkFinalize(s, t)
 
-	assert.Equal(t, None, s.ColumnTypeAffinity(0), "affinity")
-	assert.Equal(t, None, s.ColumnTypeAffinity(1), "affinity")
-	assert.Equal(t, None, s.ColumnTypeAffinity(2), "affinity")
-	assert.Equal(t, None, s.ColumnTypeAffinity(3), "affinity")
+	aff, err := s.ColumnTypeAffinity(0)
+	checkNoError(t, err, "%s")
+	assert.Equal(t, None, aff, "affinity")
+	aff, err = s.ColumnTypeAffinity(1)
+	checkNoError(t, err, "%s")
+	assert.Equal(t, None, aff, "affinity")
+	aff, err = s.ColumnTypeAffinity(2)
+	checkNoError(t, err, "%s")
+	assert.Equal(t, None, aff, "affinity")
+	aff, err = s.ColumnTypeAffinity(3)
+	checkNoError(t, err, "%s")
+	assert.Equal(t, None, aff, "affinity")
 }

stmt_test.go

@@ -78,7 +78,8 @@ func TestInsertWithStatement(t *testing.T) {
 	defer checkFinalize(rs, t)
 	columnCount = rs.ColumnCount()
 	assert.Equal(t, 3, columnCount, "column count")
-	secondColumnName := rs.ColumnName(1)
+	secondColumnName, err := rs.ColumnName(1)
+	checkNoError(t, err, "error accessing column name: %s")
 	assert.Equal(t, "int_num", secondColumnName, "column name")
 
 	if checkStep(t, rs) {
@@ -230,7 +231,8 @@ func TestScanNull(t *testing.T) {
 	assert.T(t, null, "expected null value")
 	assert.Equal(t, false, bo, "expected false")
 
-	rb, null := s.ScanRawBytes(0)
+	rb, null, err := s.ScanRawBytes(0)
+	checkNoError(t, err, "scan error: %s")
 	assert.T(t, null, "expected null value")
 	assert.Equal(t, 0, len(rb), "expected empty")
 }
@@ -254,7 +256,8 @@ func TestScanNotNull(t *testing.T) {
 	assert.T(t, !null, "expected not null value")
 	assert.Equal(t, "1", *ps)
 
-	rb, null := s.ScanRawBytes(0)
+	rb, null, err := s.ScanRawBytes(0)
+	checkNoError(t, err, "scan error: %s")
 	assert.T(t, !null, "expected not null value")
 	assert.Equal(t, 1, len(rb), "expected not empty")
 
@@ -509,7 +512,8 @@ func TestScanBytes(t *testing.T) {
 	checkNoError(t, err, "prepare error: %s")
 	defer checkFinalize(s, t)
 	assert.T(t, checkStep(t, s))
-	blob, _ := s.ScanBlob(0)
+	blob, _, err := s.ScanBlob(0)
+	checkNoError(t, err, "scan error: %s")
 	assert.Equal(t, "test", string(blob))
 }
 
@@ -528,9 +532,11 @@ func TestBindEmptyZero(t *testing.T) {
 	err = s.Scan(&ps, &zt)
 	checkNoError(t, err, "scan error: %s")
 	assert.T(t, ps == nil && zt.IsZero(), "null pointers expected")
-	_, null := s.ScanValue(0, false)
+	_, null, err := s.ScanValue(0, false)
+	checkNoError(t, err, "scan error: %s")
 	assert.T(t, null, "null string expected")
-	_, null = s.ScanValue(1, false)
+	_, null, err = s.ScanValue(1, false)
+	checkNoError(t, err, "scan error: %s")
 	assert.T(t, null, "null time expected")
 }
 
@@ -556,9 +562,11 @@ func TestBindEmptyZeroNotTransformedToNull(t *testing.T) {
 	err = s.Scan(&st, &zt)
 	checkNoError(t, err, "scan error: %s")
 	assert.T(t, len(st) == 0 && zt.IsZero(), "null pointers expected")
-	_, null := s.ScanValue(0, false)
+	_, null, err := s.ScanValue(0, false)
+	checkNoError(t, err, "scan error: %s")
 	assert.T(t, !null, "empty string expected")
-	_, null = s.ScanValue(1, false)
+	_, null, err = s.ScanValue(1, false)
+	checkNoError(t, err, "scan error: %s")
 	assert.T(t, !null, "zero time expected")
 }
 
@@ -574,8 +582,12 @@ func TestColumnType(t *testing.T) {
 	expectedAffinities := []Affinity{Integral, Real, Integral, Textual}
 	for col := 0; col < s.ColumnCount(); col++ {
 		//println(col, s.ColumnName(col), s.ColumnOriginName(col), s.ColumnType(col), s.ColumnDeclaredType(col))
-		assert.Equal(t, Null, s.ColumnType(col), "column type")
-		assert.Equal(t, expectedAffinities[col], s.ColumnTypeAffinity(col), "column type affinity")
+		ct, err := s.ColumnType(col)
+		checkNoError(t, err, "column type error: %s")
+		assert.Equal(t, Null, ct, "column type")
+		cta, err := s.ColumnTypeAffinity(col)
+		checkNoError(t, err, "column type affinity error: %s")
+		assert.Equal(t, expectedAffinities[col], cta, "column type affinity")
 	}
 }