20260507213409

code/app/app-go/pkg/db/select.go

@@ -0,0 +1,122 @@
+package db
+
+import (
+	"allapp-go/pkg/logger"
+	"context"
+	"fmt"
+	"strconv"
+	"strings"
+
+	"go.uber.org/zap"
+)
+
+func (c *Client) LoadData(
+	ctx context.Context,
+	viewName string,
+	searchCondition string,
+	orderBy string,
+	searchColumns []string,
+	args []any,
+) ([]map[string]any, error) {
+
+	selectCols := "*"
+	if len(searchColumns) > 0 {
+		selectCols = strings.Join(searchColumns, ", ")
+	}
+
+	where := ""
+	if searchCondition != "" {
+		where = " WHERE " + searchCondition
+	}
+
+	order := ""
+	if orderBy != "" {
+		order = " ORDER BY " + orderBy
+	}
+
+	sql := fmt.Sprintf(
+		"SELECT %s FROM %s%s%s",
+		selectCols,
+		viewName,
+		where,
+		order,
+	)
+
+	logger.FromCtx(ctx).Info("LoadData",
+		zap.String("sql", sql),
+		zap.Any("args", args),
+	)
+
+	return c.query(ctx, sql, args...)
+}
+
+func (c *Client) LoadDataBySQL(
+	ctx context.Context,
+	sql string,
+	args []any,
+) ([]map[string]any, error) {
+
+	logger.FromCtx(ctx).Info("LoadDataBySQL",
+		zap.String("sql", sql),
+		zap.Any("args", args),
+	)
+
+	return c.query(ctx, sql, args...)
+}
+
+func (c *Client) query(ctx context.Context, sql string, args ...any) ([]map[string]any, error) {
+
+	sql = convertPlaceholder(sql)
+
+	rows, err := c.pool.Query(ctx, sql, args...)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	fields := rows.FieldDescriptions()
+
+	result := make([]map[string]any, 0, 16)
+
+	for rows.Next() {
+		values, err := rows.Values()
+		if err != nil {
+			return nil, err
+		}
+
+		row := make(map[string]any, len(values))
+
+		for i := range fields {
+			if i < len(values) {
+				row[string(fields[i].Name)] = values[i]
+			}
+		}
+
+		result = append(result, row)
+	}
+
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+
+	return result, nil
+}
+
+func convertPlaceholder(sql string) string {
+	var sb strings.Builder
+	sb.Grow(len(sql))
+
+	argIndex := 1
+
+	for i := 0; i < len(sql); i++ {
+		if sql[i] == '?' {
+			sb.WriteByte('$')
+			sb.WriteString(strconv.Itoa(argIndex))
+			argIndex++
+		} else {
+			sb.WriteByte(sql[i])
+		}
+	}
+
+	return sb.String()
+}