Ignore not available columns when applying column types

The given `columnLists` may not contain all columns available in the
given table. This patch prevents the code to fail. Before this patch the
code was panicking whenever it was trying to set a value into a `nil`
object, e.g. `columnList.GetColumn('non-existant').Type = SomeType`.

For some reason the application was not completely failing but as a
side-effect any column after the non-existant column would never get its
Type properly set.

Author: esnunes

go/logic/inspect.go

@@ -552,44 +552,35 @@ func (this *Inspector) applyColumnTypes(databaseName, tableName string, columnsL
 	err := sqlutils.QueryRowsMap(this.db, query, func(m sqlutils.RowMap) error {
 		columnName := m.GetString("COLUMN_NAME")
 		columnType := m.GetString("COLUMN_TYPE")
-		if strings.Contains(columnType, "unsigned") {
-			for _, columnsList := range columnsLists {
-				columnsList.SetUnsigned(columnName)
+		for _, columnsList := range columnsLists {
+			column := columnsList.GetColumn(columnName)
+			if column == nil {
+				continue
 			}
-		}
-		if strings.Contains(columnType, "mediumint") {
-			for _, columnsList := range columnsLists {
-				columnsList.GetColumn(columnName).Type = sql.MediumIntColumnType
+
+			if strings.Contains(columnType, "unsigned") {
+				column.IsUnsigned = true
 			}
-		}
-		if strings.Contains(columnType, "timestamp") {
-			for _, columnsList := range columnsLists {
-				columnsList.GetColumn(columnName).Type = sql.TimestampColumnType
+			if strings.Contains(columnType, "mediumint") {
+				column.Type = sql.MediumIntColumnType
 			}
-		}
-		if strings.Contains(columnType, "datetime") {
-			for _, columnsList := range columnsLists {
-				columnsList.GetColumn(columnName).Type = sql.DateTimeColumnType
+			if strings.Contains(columnType, "timestamp") {
+				column.Type = sql.TimestampColumnType
 			}
-		}
-		if strings.Contains(columnType, "json") {
-			for _, columnsList := range columnsLists {
-				columnsList.GetColumn(columnName).Type = sql.JSONColumnType
+			if strings.Contains(columnType, "datetime") {
+				column.Type = sql.DateTimeColumnType
 			}
-		}
-		if strings.Contains(columnType, "float") {
-			for _, columnsList := range columnsLists {
-				columnsList.GetColumn(columnName).Type = sql.FloatColumnType
+			if strings.Contains(columnType, "json") {
+				column.Type = sql.JSONColumnType
 			}
-		}
-		if strings.HasPrefix(columnType, "enum") {
-			for _, columnsList := range columnsLists {
-				columnsList.GetColumn(columnName).Type = sql.EnumColumnType
+			if strings.Contains(columnType, "float") {
+				column.Type = sql.FloatColumnType
 			}
-		}
-		if charset := m.GetString("CHARACTER_SET_NAME"); charset != "" {
-			for _, columnsList := range columnsLists {
-				columnsList.SetCharset(columnName, charset)
+			if strings.HasPrefix(columnType, "enum") {
+				column.Type = sql.EnumColumnType
+			}
+			if charset := m.GetString("CHARACTER_SET_NAME"); charset != "" {
+				column.Charset = charset
 			}
 		}
 		return nil