增加查询表格信息

chain.go

@@ -179,6 +179,70 @@ func (this *Query) Clean() *Query {
 	return this
 }
 
+//获取表格信息
+func (this *Query) GetTableInfo(table string) (map[string]interface{}, error) {
+	field := []string{
+		"COLUMN_NAME",    //字段名
+		"COLUMN_DEFAULT", //默认值
+		"DATA_TYPE",      //数据类型
+		"COLUMN_TYPE",    //数据类型+长度
+		"COLUMN_COMMENT", //备注
+		"IS_NULLABLE",    //是否为空
+	}
+	sql := "select `" + strings.Join(field, "`,`") + "` from information_schema.COLUMNS where table_name = ? and table_schema = ?"
+
+	stmtSql, err := this.conn.Prepare(sql)
+	if err != nil {
+		return nil, err
+	}
+	list, err := StmtForQueryList(stmtSql, []interface{}{table, this.dbname})
+	if err != nil {
+		return nil, err
+	}
+	rows := make([]interface{}, 0, len(list))
+	fieldName := make([]string, 0, len(list))
+	for _, item := range list {
+		info := map[string]interface{}{
+			"name":        "",
+			"column_type": "",
+			"is_null":     true,
+			"data_type":   "",
+			"comment":     "",
+			"default":     "",
+		}
+		for _, k := range field {
+			index := helper.StrFirstToUpper(k)
+			if v, ok := item[index]; ok {
+				switch k {
+				case "COLUMN_NAME":
+					info["name"] = v
+				case "COLUMN_DEFAULT":
+					info["default"] = v
+				case "DATA_TYPE":
+					info["data_type"] = v
+				case "COLUMN_TYPE":
+					info["column_type"] = helper.ToInt64(v)
+				case "COLUMN_COMMENT":
+					info["comment"] = helper.ToInt64(v)
+				case "IS_NULLABLE":
+					if v == "NO" {
+						info["is_null"] = false
+					}
+				}
+			}
+		}
+		name := helper.ToStr(info["name"])
+		if name != "" {
+			rows = append(rows, info)
+			fieldName = append(fieldName, name)
+		}
+	}
+	return map[string]interface{}{
+		"field": fieldName,
+		"list":  rows,
+	}, nil
+}
+
 //构造子查询
 func (this *Query) BuildSelectSql() (map[string]interface{}, error) {
 	if this.dbname == "" && this.table == "" {

transaction_chain.go

@@ -278,6 +278,70 @@ func (this *TxQuery) BuildSelectSql() (map[string]interface{}, error) {
 	}, nil
 }
 
+//获取表格信息
+func (this *TxQuery) GetTableInfo(table string) (map[string]interface{}, error) {
+	field := []string{
+		"COLUMN_NAME",    //字段名
+		"COLUMN_DEFAULT", //默认值
+		"DATA_TYPE",      //数据类型
+		"COLUMN_TYPE",    //数据类型+长度
+		"COLUMN_COMMENT", //备注
+		"IS_NULLABLE",    //是否为空
+	}
+	sql := "select `" + strings.Join(field, "`,`") + "` from information_schema.COLUMNS where table_name = ? and table_schema = ?"
+
+	stmtSql, err := this.tx.Prepare(sql)
+	if err != nil {
+		return nil, err
+	}
+	list, err := StmtForQueryList(stmtSql, []interface{}{table, this.dbname})
+	if err != nil {
+		return nil, err
+	}
+	rows := make([]interface{}, 0, len(list))
+	fieldName := make([]string, 0, len(list))
+	for _, item := range list {
+		info := map[string]interface{}{
+			"name":        "",
+			"column_type": "",
+			"is_null":     true,
+			"data_type":   "",
+			"comment":     "",
+			"default":     "",
+		}
+		for _, k := range field {
+			index := helper.StrFirstToUpper(k)
+			if v, ok := item[index]; ok {
+				switch k {
+				case "COLUMN_NAME":
+					info["name"] = v
+				case "COLUMN_DEFAULT":
+					info["default"] = v
+				case "DATA_TYPE":
+					info["data_type"] = v
+				case "COLUMN_TYPE":
+					info["column_type"] = helper.ToInt64(v)
+				case "COLUMN_COMMENT":
+					info["comment"] = helper.ToInt64(v)
+				case "IS_NULLABLE":
+					if v == "NO" {
+						info["is_null"] = false
+					}
+				}
+			}
+		}
+		name := helper.ToStr(info["name"])
+		if name != "" {
+			rows = append(rows, info)
+			fieldName = append(fieldName, name)
+		}
+	}
+	return map[string]interface{}{
+		"field": fieldName,
+		"list":  rows,
+	}, nil
+}
+
 // 拼查询sql
 func (this *TxQuery) QueryStmt() error {