【发布时间】：2019-08-17 13:16:17
【问题描述】：
我正在尝试将 SQLite3 集成到我在 UE4 中的测试项目中，但我遇到了一些问题。
首先是一些家务。链接到 GitHub 上的 repo，Square 的插件是旧 CISQLite3 插件的分叉和更新版本：
https://github.com/Squareys/unreal-sqlite3
接下来，我使用的项目是一个蓝图项目，其中包含从编辑器中创建的自定义类。
安装步骤： 我遵循了 repo 的自述文件中的安装指南，其中说明了以下内容：
下载插件 zip 并将其解压缩到您的项目插件文件夹中。打开编辑器并转到插件管理器并启用插件。重启并允许编辑器编译插件。
在 4.20.x 中，这显然是所有需要的。无论出于何种原因，在 4.21.2 中这个过程都被破坏了。我遇到了与生成的文件有关的各种问题。
所以对于我所尝试的： 我已经尝试在插件中间文件夹中给出生成文件的绝对路径 - 这只是允许编译器像来自地狱的老忠实一样吐出错误。
我尝试过开始一个新项目；三次。由于稍后我将在帖子中提出的错误，我总是遇到无法继续前进的地步。
我尝试在删除 .vs、二进制文件、中间文件和已保存文件夹后重新生成项目文件。有时重建可以重新创建文件（不能解决问题），但在某些时候它开始失败，当我打开项目时，它将无法编译项目 dll/lib 并说要手动编译。
好的，继续讨论实际的错误。我将逐步引导您完成并在我执行的每个调试步骤中显示错误。
首先，即使在没有自定义代码的新项目中，我也会收到以下两个警告：
MiningTechDemo5\Plugins\CISQLite3\Source\CISQLite3\CISQLite3.Build.cs：警告：从 UE 4.21 开始，模块必须指定一个明确的预编译标头（例如 PrivatePCHHeaderFile = "Private/CISQLite3PrivatePCH.h"）。
MiningTechDemo5\Plugins\CISQLite3\Source\CISQLite3\CISQLite3.Build.cs：警告：引用目录 'F:\UE4\Epic Games\UE_4.21\Engine\Source\CISQLite3\Public' 不存在。
为了解决这个问题，我将插件构建文件更改为：
// Copyright (c) 2015 Jussi Saarivirta 2016 conflict.industries MIT License (MIT)
using UnrealBuildTool;
public class CISQLite3 : ModuleRules
{
public CISQLite3(ReadOnlyTargetRules Target) : base(Target)
{
PublicIncludePaths.AddRange(
new string[] {
"F:/UE4/Projects/MiningTechDemo5/Plugins/CISQLite3/Source/CISQLite3/Public"
}
);
PrivateIncludePaths.AddRange(
new string[] {
"F:/UE4/Projects/MiningTechDemo5/Plugins/CISQLite3/Source/CISQLite3/Private"
}
);
PublicDependencyModuleNames.AddRange(
new string[] {
"Engine",
"Core",
"CoreUObject"
}
);
PrivateDependencyModuleNames.AddRange(
new string[] {}
);
DynamicallyLoadedModuleNames.AddRange(
new string[] {}
);
}
}
我必须使用绝对路径，因为出于某种原因 ModuleDirectory 只指向我的 F:\ 驱动器而不是项目/插件文件夹。所以，这些错误现在已经消失了。一切似乎都很好，直到我将 SQLiteDatabase.h 包含到我的 DatabaseHandler 自定义类（在编辑器中创建）中。
我得到的第一个错误是找不到 DatabaseHandler.generated.h，但这是因为找不到 SQLiteDatabase.h 的第二个错误。所以我认为，这可能与 CISQLite3 构建文件的问题相同，我将我的项目构建文件从默认生成的代码更改为：
// Fill out your copyright notice in the Description page of Project Settings.
using UnrealBuildTool;
public class MiningTechDemo5 : ModuleRules
{
public MiningTechDemo5(ReadOnlyTargetRules Target) : base(Target)
{
PCHUsage = PCHUsageMode.UseExplicitOrSharedPCHs;
PublicDependencyModuleNames.AddRange(new string[] { "Core", "CoreUObject", "Engine", "InputCore" });
PrivateDependencyModuleNames.AddRange(new string[] { });
PrivateIncludePaths.Add("F:/UE4/Projects/MiningTechDemo5/Plugins/CISQLite3/Source/CISQLite3/Private");
PublicIncludePaths.Add("F:/UE4/Projects/MiningTechDemo5/Plugins/CISQLite3/Source/CISQLite3/Public");
PublicLibraryPaths.Add("F:/UE4/Projects/MiningTechDemo5/Binaries/Win64");
// Uncomment if you are using Slate UI
// PrivateDependencyModuleNames.AddRange(new string[] { "Slate", "SlateCore" });
// Uncomment if you are using online features
// PrivateDependencyModuleNames.Add("OnlineSubsystem");
// To include OnlineSubsystemSteam, add it to the plugins section in your uproject file with the Enabled attribute set to true
}
}
再一次，完整的路径，因为 ModuleDirectory 不起作用，Path.Combine 也不起作用；至少不会使用将路径的一部分作为帮助成员返回的字符串属性，因此输入的文本更少。
所以我重建，同样的错误。我继续将包含更改为绝对路径：
包括“SQLiteDatabase.h”
到这里：
包括“F:/UE4/Projects/MiningTechDemo5/Plugins/CISQLite3/Source/CISQLite3/Public/SQLiteDatabase.h”
重新编译。 Huzzah，没有错误。废话，因为现在有一个新的错误。这个是针对 SQLiteBlueprintNodes.h 文件的：
无法打开包含文件：'SQLiteBlueprintNodes.generated.h'：没有这样的文件或目录
好的，所以我绝对路径它：
包括“F:/UE4/Projects/MiningTechDemo5/Plugins/CISQLite3/Intermediate/Build/Win64/UE4Editor/Inc/CISQLite3/SQLiteBlueprintNodes.generated.h”
此时，编译器获取生成的文件并用一堆编译器 barf 和一个新生成的文件未找到 SQLiteDatabaseStructs.generated.h 的错误：
'FSQLiteQueryLogicExpectedNode' uses undefined struct 'CISQLITE3_API' 8
'friend': not allowed outside of a class definition 9
type 'Z_Construct_UScriptStruct_FSQLiteQueryLogicExpectedNode_Statics' unexpected 9
missing type specifier - int assumed. Note: C++ does not support default-int 14
'FSQLiteQueryLogicExpectedNode': redefinition; previous definition was 'data variable' 14
missing type specifier - int assumed. Note: C++ does not support default-int 15
'FSQLiteQueryLogicExpectedNode': redefinition; previous definition was 'data variable' 15
'FSQLiteQueryLogicExpectedNode': constructor initializer lists are only allowed on constructor definitions 16
syntax error: '}' 19
syntax error: missing ';' before '}' 19
'FSQLiteQueryTermExpectedNode' uses undefined struct 'CISQLITE3_API' 23
'friend': not allowed outside of a class definition 24
type 'Z_Construct_UScriptStruct_FSQLiteQueryTermExpectedNode_Statics' unexpected 24
'FString Query': redefinition 27
'void __cdecl `dynamic initializer for 'Query''(void)': constructor initializer lists are only allowed on constructor definitions 27
missing type specifier - int assumed. Note: C++ does not support default-int 29
'FSQLiteQueryTermExpectedNode': redefinition; previous definition was 'data variable' 29
missing type specifier - int assumed. Note: C++ does not support default-int 30
'FSQLiteQueryTermExpectedNode': redefinition; previous definition was 'data variable' 30
'FSQLiteQueryTermExpectedNode': constructor initializer lists are only allowed on constructor definitions 31
syntax error: '}' 34
syntax error: missing ';' before '}' 34
'FSQLiteQueryFinalizedQuery' uses undefined struct 'CISQLITE3_API' 38
'friend': not allowed outside of a class definition 39
type 'Z_Construct_UScriptStruct_FSQLiteQueryFinalizedQuery_Statics' unexpected 39
'FString Query': redefinition 42
'void __cdecl `dynamic initializer for 'Query''(void)': constructor initializer lists are only allowed on constructor definitions 42
missing type specifier - int assumed. Note: C++ does not support default-int 44
'FSQLiteQueryFinalizedQuery': redefinition; previous definition was 'data variable' 44
missing type specifier - int assumed. Note: C++ does not support default-int 45
'FSQLiteQueryFinalizedQuery': redefinition; previous definition was 'data variable' 45
'FSQLiteQueryFinalizedQuery': constructor initializer lists are only allowed on constructor definitions 45
syntax error: '}' 46
syntax error: missing ';' before '}' 46
Cannot open include file: 'SQLiteDatabaseStructs.generated.h': No such file or directory 2
对于我使用绝对路径生成的每个文件，我都会收到所有这些相同的错误，以及一个额外的生成文件错误，直到我返回 SQLiteDatabase.h。当我生成文件的绝对路径时，这是我得到的新错误：
标题顶部应包含一个包含：'#include "SQLiteDatabase.generated.h"'
为简洁起见，我将包括上面提到的所有文件及其生成的文件，如果它们抛出错误，如下所示：
SQLiteBlueprintNotes.h：
#pragma once
#include "F:/UE4/Projects/MiningTechDemo5/Plugins/CISQLite3/Intermediate/Build/Win64/UE4Editor/Inc/CISQLite3/SQLiteBlueprintNodes.generated.h"
USTRUCT(BlueprintType)
struct CISQLITE3_API FSQLiteQueryLogicExpectedNode
{
GENERATED_USTRUCT_BODY()
UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "SQLite Database Query")
FString Query;
FSQLiteQueryLogicExpectedNode(){}
FSQLiteQueryLogicExpectedNode(FString LHSQuery, FString Append) : Query(LHSQuery)
{
Query += Append;
}
};
USTRUCT(BlueprintType)
struct CISQLITE3_API FSQLiteQueryTermExpectedNode
{
GENERATED_USTRUCT_BODY()
UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "SQLite Database Query")
FString Query;
FSQLiteQueryTermExpectedNode(){}
FSQLiteQueryTermExpectedNode(FString LHSQuery, FString Append) : Query(LHSQuery)
{
Query += Append;
}
};
USTRUCT(BlueprintType)
struct CISQLITE3_API FSQLiteQueryFinalizedQuery
{
GENERATED_USTRUCT_BODY()
UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "SQLite Database Query")
FString Query;
FSQLiteQueryFinalizedQuery(){}
FSQLiteQueryFinalizedQuery(FString Query) : Query(Query){}
};
SQLiteBlueprintNodes.generated.h：
// Copyright 1998-2018 Epic Games, Inc. All Rights Reserved.
/*===========================================================================
Generated code exported from UnrealHeaderTool.
DO NOT modify this manually! Edit the corresponding .h files instead!
===========================================================================*/
#include "UObject/ObjectMacros.h"
#include "UObject/ScriptMacros.h"
PRAGMA_DISABLE_DEPRECATION_WARNINGS
#ifdef CISQLITE3_SQLiteBlueprintNodes_generated_h
#error "SQLiteBlueprintNodes.generated.h already included, missing '#pragma once' in SQLiteBlueprintNodes.h"
#endif
#define CISQLITE3_SQLiteBlueprintNodes_generated_h
#define MiningTechDemo5_Plugins_CISQLite3_Source_CISQLite3_Public_SQLiteBlueprintNodes_h_39_GENERATED_BODY \
friend struct Z_Construct_UScriptStruct_FSQLiteQueryFinalizedQuery_Statics; \
static class UScriptStruct* StaticStruct();
#define MiningTechDemo5_Plugins_CISQLite3_Source_CISQLite3_Public_SQLiteBlueprintNodes_h_24_GENERATED_BODY \
friend struct Z_Construct_UScriptStruct_FSQLiteQueryTermExpectedNode_Statics; \
static class UScriptStruct* StaticStruct();
#define MiningTechDemo5_Plugins_CISQLite3_Source_CISQLite3_Public_SQLiteBlueprintNodes_h_9_GENERATED_BODY \
friend struct Z_Construct_UScriptStruct_FSQLiteQueryLogicExpectedNode_Statics; \
static class UScriptStruct* StaticStruct();
#undef CURRENT_FILE_ID
#define CURRENT_FILE_ID MiningTechDemo5_Plugins_CISQLite3_Source_CISQLite3_Public_SQLiteBlueprintNodes_h
PRAGMA_ENABLE_DEPRECATION_WARNINGS
SQLiteDatabaseStructs.h：
#pragma once
#include "F:/UE4/Projects/MiningTechDemo5/Plugins/CISQLite3/Intermediate/Build/Win64/UE4Editor/Inc/CISQLite3/SQLiteDatabaseStructs.generated.h"
USTRUCT(BlueprintType)
struct CISQLITE3_API FSQLiteIndex
{
GENERATED_USTRUCT_BODY()
/** String with piece if SQL script*/
UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "SQLite Index")
FString ResultStr = "";
/** Index name*/
UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "SQLite Index")
FString IndexName = "";
};
USTRUCT(BlueprintType)
struct CISQLITE3_API FSQLitePrimaryKey
{
GENERATED_USTRUCT_BODY()
/** String with piece if SQL script*/
UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "SQLite Primary Key")
FString ResultStr = "";
};
USTRUCT(BlueprintType)
struct CISQLITE3_API FSQLiteTableField
{
GENERATED_USTRUCT_BODY()
/** String with piece if SQL script*/
UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "SQLite Table Field")
FString ResultStr = "";
/** Field name*/
UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "SQLite Table Field")
FString FieldName = "";
/** Field type*/
UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "SQLite Table Field")
FString FieldType = "";
/** Field value*/
UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "SQLite Table Field")
FString FieldValue = "";
};
USTRUCT(BlueprintType)
struct CISQLITE3_API FSQLiteTableRowSimulator
{
GENERATED_USTRUCT_BODY()
/** Index name*/
UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "SQLite Index")
TArray<FSQLiteTableField> rowsOfFields;
};
USTRUCT(BlueprintType)
struct CISQLITE3_API FSQLiteTable
{
GENERATED_USTRUCT_BODY()
/** Database name*/
UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "SQLite Table")
FString DatabaseName = "";
/** Table name*/
UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "SQLite Table")
FString TableName = "";
/** Array with Fields*/
UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "SQLite Table")
TArray<FSQLiteTableField> Fields;
/** Primary Key */
UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "SQLite Table")
FSQLitePrimaryKey PK;
/** Created Key */
UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "SQLite Table")
bool Created = false;
};
SQLiteDatabaseStructs.generated.h：
// Copyright 1998-2018 Epic Games, Inc. All Rights Reserved.
/*===========================================================================
Generated code exported from UnrealHeaderTool.
DO NOT modify this manually! Edit the corresponding .h files instead!
===========================================================================*/
#include "UObject/ObjectMacros.h"
#include "UObject/ScriptMacros.h"
PRAGMA_DISABLE_DEPRECATION_WARNINGS
#ifdef CISQLITE3_SQLiteDatabaseStructs_generated_h
#error "SQLiteDatabaseStructs.generated.h already included, missing '#pragma once' in SQLiteDatabaseStructs.h"
#endif
#define CISQLITE3_SQLiteDatabaseStructs_generated_h
#define MiningTechDemo5_Plugins_CISQLite3_Source_CISQLite3_Public_SQLiteDatabaseStructs_h_66_GENERATED_BODY \
friend struct Z_Construct_UScriptStruct_FSQLiteTable_Statics; \
static class UScriptStruct* StaticStruct();
#define MiningTechDemo5_Plugins_CISQLite3_Source_CISQLite3_Public_SQLiteDatabaseStructs_h_55_GENERATED_BODY \
friend struct Z_Construct_UScriptStruct_FSQLiteTableRowSimulator_Statics; \
static class UScriptStruct* StaticStruct();
#define MiningTechDemo5_Plugins_CISQLite3_Source_CISQLite3_Public_SQLiteDatabaseStructs_h_32_GENERATED_BODY \
friend struct Z_Construct_UScriptStruct_FSQLiteTableField_Statics; \
static class UScriptStruct* StaticStruct();
#define MiningTechDemo5_Plugins_CISQLite3_Source_CISQLite3_Public_SQLiteDatabaseStructs_h_22_GENERATED_BODY \
friend struct Z_Construct_UScriptStruct_FSQLitePrimaryKey_Statics; \
static class UScriptStruct* StaticStruct();
#define MiningTechDemo5_Plugins_CISQLite3_Source_CISQLite3_Public_SQLiteDatabaseStructs_h_7_GENERATED_BODY \
friend struct Z_Construct_UScriptStruct_FSQLiteIndex_Statics; \
static class UScriptStruct* StaticStruct();
#undef CURRENT_FILE_ID
#define CURRENT_FILE_ID MiningTechDemo5_Plugins_CISQLite3_Source_CISQLite3_Public_SQLiteDatabaseStructs_h
PRAGMA_ENABLE_DEPRECATION_WARNINGS
SQLiteDatabase.h：
#pragma once
#include "sqlite3.h"
#include "SQLiteBlueprintNodes.h"
#include "SQLiteDatabaseStructs.h"
#include "F:/UE4/Projects/MiningTechDemo5/Plugins/CISQLite3/Intermediate/Build/Win64/UE4Editor/Inc/CISQLite3/SQLiteDatabase.generated.h"
USTRUCT(BlueprintType)
struct CISQLITE3_API FSQLiteDatabaseReference
{
GENERATED_USTRUCT_BODY()
/** The database name (not the filename) */
UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "SQLite Database Reference")
FString DatabaseName;
/** The database tables we want to get data from */
UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "SQLite Database Reference")
TArray<FString> Tables;
};
USTRUCT(BlueprintType)
struct CISQLITE3_API FSQLiteKeyValuePair
{
GENERATED_USTRUCT_BODY()
/** The database table field name */
UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "SQLite Key Value Pair")
FString Key;
/** The value of the field */
UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "SQLite Key Value Pair")
FString Value;
};
USTRUCT(BlueprintType)
struct CISQLITE3_API FSQLiteQueryResultRow
{
GENERATED_USTRUCT_BODY()
/** A list of field name, field value pairs */
UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "SQLite Query Result")
TArray<FSQLiteKeyValuePair> Fields;
};
USTRUCT(BlueprintType)
struct CISQLITE3_API FSQLiteQueryResult
{
GENERATED_USTRUCT_BODY()
/** The resulting rows from the query */
UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "SQLite Query Result")
TArray<FSQLiteQueryResultRow> ResultRows;
/** Was the query successful or not */
UPROPERTY(BlueprintReadOnly, Category = "SQLite Query Result")
bool Success;
/** If the query was unsuccessful a human readable error message will be populated here */
UPROPERTY(BlueprintReadOnly, Category = "SQLite Query Result")
FString ErrorMessage;
};
// A few things for internal use here.
namespace SQLiteResultValueTypes
{
enum SQLiteResultValType
{
Integer,
Float,
Text,
UnsupportedValueType
};
}
// Result field, used as an intermediary when collecting results from
// an SQLITE3 query.
struct SQLiteResultField
{
FString StringValue;
double DoubleValue;
int64 IntValue;
FString Name;
SQLiteResultValueTypes::SQLiteResultValType Type;
FString ToString()
{
if (Type == SQLiteResultValueTypes::Text)
return StringValue;
else if (Type == SQLiteResultValueTypes::Integer)
return FString::Printf(TEXT("%i"), IntValue);
else if (Type == SQLiteResultValueTypes::Float)
return FString::Printf(TEXT("%f"), DoubleValue);
return StringValue;
}
};
// Represents a single row in the result.
struct SQLiteResultValue
{
TArray<SQLiteResultField> Fields;
};
// The internal result object.
struct SQLiteQueryResult
{
bool Success;
FString ErrorMessage;
TArray<SQLiteResultValue> Results;
};
/**
* SQLite main database class.
*/
UCLASS()
class CISQLITE3_API USQLiteDatabase : public UObject
{
GENERATED_UCLASS_BODY()
public:
/** Create a sqlite database file if it doesn't exist already. Does nothing if already exists.
* Returns false if the file couldn't be created */
UFUNCTION(BlueprintCallable, Category = "SQLite")
static bool CreateDatabase(const FString& Filename, bool RelativeToGameContentDirectory);
/** Checks if the database is registered, ie. that it can be found in Databases. */
/** Add a database to the list of databases. It will be checked that it's valid (will try to open it) */
UFUNCTION(BlueprintCallable, Category = "SQLite")
static bool RegisterDatabase(const FString& Name, const FString& Filename, bool RelativeToGameContentDirectory, bool KeepOpen=false);
/** Remove a database from the list of databases. Closes the database in case KeepOpen flag was set during @ref RegisterDatabase */
UFUNCTION(BlueprintCallable, Category = "SQLite")
static void UnregisterDatabase(const FString& Name);
/** Checks if the database is registered, ie. that it can be found in Databases. */
UFUNCTION(BlueprintCallable, Category = "SQLite")
static bool IsDatabaseRegistered(const FString& DatabaseName);
/** Get data from the database using a select statement straight into an UObject, ie. populates its properties. */
UFUNCTION(BlueprintCallable, Category = "SQLite", meta = (DisplayName = "Get Data Into Object (manual query)"))
static bool GetDataIntoObject(const FString& DatabaseName, const FString& Query, UObject* ObjectToPopulate);
/** Blueprint: Gets data from the database using a select statement straight into an UObject, ie. populates its properties.
* Note: Does not create a new object. ObjectToPopulate is the reference to the object you want to populate. */
UFUNCTION(BlueprintCallable, Category = "SQLite", meta = (DisplayName = "Get Data Into Object"))
static bool GetDataIntoObjectBP(const FSQLiteDatabaseReference& DataSource, TArray<FString> Fields, FSQLiteQueryFinalizedQuery Query, UObject* ObjectToPopulate);
/** Get data from the database using a select statement and return the rows. */
UFUNCTION(BlueprintCallable, Category = "SQLite", meta = (DisplayName = "Get Data From Table(s) (manual query)"))
static FSQLiteQueryResult GetData(const FString& DatabaseName, const FString& Query);
/** Blueprint: Get data from the database. Returns the resulting rows. */
UFUNCTION(BlueprintCallable, Category = "SQLite", meta = (DisplayName = "Get Data From Table(s)"))
static FSQLiteQueryResult GetDataBP(const FSQLiteDatabaseReference& DataSource, TArray<FString> Fields, FSQLiteQueryFinalizedQuery Query, int32 MaxResults = -1, int32 ResultOffset = 0);
/** Create table in the database. */
UFUNCTION(BlueprintCallable, Category = "SQLite|Query", meta = (DisplayName = "Create Table"))
static FSQLiteTable CreateTable(const FString& DatabaseName, const FString& TableName,
const TArray<FSQLiteTableField> Fields, const FSQLitePrimaryKey PK);
/** Create indexes for table */
UFUNCTION(BlueprintCallable, Category = "SQLite|Query", meta = (DisplayName = "Create Indexes"))
static bool CreateIndexes(const FString& DatabaseName, const FString& TableName, const TArray<FSQLiteIndex> Indexes);
/** Create index for table */
UFUNCTION(BlueprintCallable, Category = "SQLite|Query", meta = (DisplayName = "Create Index"))
static bool CreateIndex(const FString& DatabaseName, const FString& TableName, const FSQLiteIndex Index);
/** Drop index*/
UFUNCTION(BlueprintCallable, Category = "SQLite|Query", meta = (DisplayName = "Drop Index"))
static bool DropIndex(const FString& DatabaseName, const FString& IndexName);
/** Drop Table*/
UFUNCTION(BlueprintCallable, Category = "SQLite|Query", meta = (DisplayName = "Drop Table"))
static bool DropTable(const FString& DatabaseName, const FString& TableName);
/** Truncate Table*/
UFUNCTION(BlueprintCallable, Category = "SQLite|Query", meta = (DisplayName = "Truncate Table"))
static bool TruncateTable(const FString& DatabaseName, const FString& TableName);
/** Is table exists?*/
UFUNCTION(BlueprintCallable, Category = "SQLite|Query", meta = (DisplayName = "Is table exists?"))
static bool IsTableExists(const FString& DatabaseName, const FString& TableName);
/** Insert rows into table */
UFUNCTION(BlueprintCallable, Category = "SQLite|Query", meta = (DisplayName = "Insert Rows Into Table"))
static void InsertRowsIntoTable(const FString& DatabaseName, const FString& TableName, TArray<FSQLiteTableRowSimulator> rowsOfFields);
/** Compact database*/
UFUNCTION(BlueprintCallable, Category = "SQLite|Query", meta = (DisplayName = "Compact database"))
static bool Vacuum(const FString& DatabaseName);
/** Execute SQL (can be used for insert statement)*/
UFUNCTION(BlueprintCallable, Category = "SQLite|Query", meta = (DisplayName = "Execute SQL"))
static bool ExecSql(const FString& DatabaseName, const FString& Query);
/** Checks database validity (if the file exists and/or if it can be opened). */
UFUNCTION(BlueprintCallable, Category = "SQLite|Query", meta = (DisplayName = "Is Valid Database"))
static bool IsValidDatabase(const FString& DatabaseFilename, bool TestByOpening);
/** Runs a query and returns fetched rows. */
static TUniquePtr<SQLiteQueryResult> RunQueryAndGetResults(const FString& DatabaseName, const FString& Query);
private:
/** Tries to open a database. */
static bool CanOpenDatabase(const FString& DatabaseFilename);
/** Collects all properties from an UObject and maps them by the property name. */
static TMap<FString, UProperty*> CollectProperties(UObject* SourceObject);
/** Constructs an SQL query from the blueprint fed data. */
static FString ConstructQuery(TArray<FString> Tables, TArray<FString> Fields, FSQLiteQueryFinalizedQuery QueryObject, int32 MaxResults = -1, int32 ResultOffset = 0);
/** Assigns a result row's fields' values to an UObject, ie. assigns them to the properties that have the same name. */
static void AssignResultsToObjectProperties(const SQLiteResultValue& ResultValue, UObject* ObjectToPopulate);
/** @brief Prepare given statement, returns whether to keep the database open */
static bool PrepareStatement(const FString& DatabaseName, const FString& Query, sqlite3** Db, int32** SqlReturnCode,
sqlite3_stmt** PreparedStatement);
private:
/** A list of the databases for convenience, easier to refer to them by name rather than a long filename. */
static TMap<FString, FString> Databases;
static TMap<FString, sqlite3*> SQLite3Databases;
};
用于 SQLiteDatabase.generated.h 的 PasteBin 因为太长而无法包含在问题正文中：
此时我真的没有想法，我无法在网上找到任何与此插件类似的东西。不确定是否有人将它与更新版本的引擎一起使用。我本人和我电脑旁边的墙将非常感谢任何帮助。
【问题讨论】：
标签： c++ plugins sqlite compiler-errors unreal-engine4