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- 优化 ClickHouse like 为 positionCaseInsensitive #1386

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2881099 2022-12-29 16:17:10 +08:00
parent f415ca7765
commit 7a64f9d65f
1 changed files with 2 additions and 9 deletions
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11
Providers/FreeSql.Provider.ClickHouse/ClickHouseExpression.cs
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@ -317,16 +317,9 @@ namespace FreeSql.ClickHouse
case "Contains": case "Contains":
var args0Value = getExp(exp.Arguments[0]); var args0Value = getExp(exp.Arguments[0]);
if (args0Value == "NULL") return $"({left}) IS NULL"; if (args0Value == "NULL") return $"({left}) IS NULL";
if (args0Value.Contains("%")) if (exp.Method.Name == "StartsWith") return $"positionCaseInsensitive({left}, {args0Value}) = 1";
{
if (exp.Method.Name == "StartsWith") return $"locate({args0Value}, {left}) = 1";
if (exp.Method.Name == "EndsWith") return $"locate({args0Value}, {left}) = char_length({args0Value})";
return $"locate({args0Value}, {left}) > 0";
}
if (exp.Method.Name == "StartsWith") return $"({left}) LIKE {(args0Value.EndsWith("'") ? args0Value.Insert(args0Value.Length - 1, "%") : $"concat({args0Value}, '%')")}";
if (exp.Method.Name == "EndsWith") return $"({left}) LIKE {(args0Value.StartsWith("'") ? args0Value.Insert(1, "%") : $"concat('%', {args0Value})")}"; if (exp.Method.Name == "EndsWith") return $"({left}) LIKE {(args0Value.StartsWith("'") ? args0Value.Insert(1, "%") : $"concat('%', {args0Value})")}";
if (args0Value.StartsWith("'") && args0Value.EndsWith("'")) return $"({left}) LIKE {args0Value.Insert(1, "%").Insert(args0Value.Length, "%")}"; return $"positionCaseInsensitive({left}, {args0Value}) > 0";
return $"({left}) LIKE concat('%', {args0Value}, '%')";
case "ToLower": return $"lower({left})"; case "ToLower": return $"lower({left})";
case "ToUpper": return $"upper({left})"; case "ToUpper": return $"upper({left})";
case "Substring": case "Substring":