Fri, 17 Apr 2009 23:46:12 +0000
Add 'columns' method to statement handles to retrieve column names from a result set
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1 | #include "dbd_oracle.h" |
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2 | |
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3 | /* |
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4 | * Converts SQLite types to Lua types |
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5 | */ |
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6 | static lua_push_type_t oracle_to_lua_push(unsigned int oracle_type, int null) { |
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7 | lua_push_type_t lua_type; |
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8 | |
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9 | if (null) |
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10 | return LUA_PUSH_NIL; |
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11 | |
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12 | switch(oracle_type) { |
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13 | case SQLT_NUM: |
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14 | case SQLT_FLT: |
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15 | lua_type = LUA_PUSH_NUMBER; |
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16 | break; |
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17 | case SQLT_INT: |
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18 | lua_type = LUA_PUSH_INTEGER; |
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19 | break; |
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20 | default: |
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21 | lua_type = LUA_PUSH_STRING; |
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22 | } |
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23 | |
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24 | return lua_type; |
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25 | } |
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26 | |
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27 | /* |
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28 | * num_affected_rows = statement:affected() |
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29 | */ |
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30 | static int statement_affected(lua_State *L) { |
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31 | statement_t *statement = (statement_t *)luaL_checkudata(L, 1, DBD_ORACLE_STATEMENT); |
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32 | int affected; |
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33 | int rc; |
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34 | |
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35 | if (!statement->stmt) { |
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36 | luaL_error(L, DBI_ERR_INVALID_STATEMENT); |
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37 | } |
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38 | |
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39 | /* |
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40 | * get number of affected rows |
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41 | */ |
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42 | rc = OCIAttrGet( |
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43 | (dvoid *)statement->stmt, |
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44 | (ub4)OCI_HTYPE_STMT, |
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45 | (dvoid *)&affected, |
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46 | (ub4 *)0, |
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47 | (ub4)OCI_ATTR_ROW_COUNT, |
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48 | statement->conn->err |
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49 | ); |
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50 | |
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51 | lua_pushinteger(L, affected); |
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52 | |
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53 | return 1; |
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54 | } |
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55 | |
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56 | /* |
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57 | * success = statement:close() |
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58 | */ |
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59 | int statement_close(lua_State *L) { |
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60 | statement_t *statement = (statement_t *)luaL_checkudata(L, 1, DBD_ORACLE_STATEMENT); |
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61 | int ok = 0; |
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62 | |
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63 | if (statement->stmt) { |
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64 | int rc; |
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65 | |
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66 | rc = OCIHandleFree((dvoid *)statement->stmt, OCI_HTYPE_STMT); /* Free handles */ |
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67 | |
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68 | statement->stmt = NULL; |
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69 | } |
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70 | |
27 | 71 | if (statement->bind) { |
72 | free(statement->bind); | |
73 | statement->bind = NULL; | |
74 | } | |
75 | ||
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76 | lua_pushboolean(L, ok); |
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77 | return 1; |
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78 | } |
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79 | |
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80 | /* |
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81 | * column_names = statement:columns() |
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82 | */ |
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83 | static int statement_rowcount(lua_State *L) { |
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84 | luaL_error(L, DBI_ERR_NOT_IMPLEMENTED, DBD_ORACLE_STATEMENT, "columns"); |
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85 | |
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86 | return 0; |
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87 | } |
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88 | |
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89 | |
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90 | /* |
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91 | * success,err = statement:execute(...) |
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92 | */ |
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93 | int statement_execute(lua_State *L) { |
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94 | int n = lua_gettop(L); |
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95 | statement_t *statement = (statement_t *)luaL_checkudata(L, 1, DBD_ORACLE_STATEMENT); |
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96 | int p; |
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97 | int errflag = 0; |
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98 | const char *errstr = NULL; |
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99 | int num_columns; |
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100 | int rc; |
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101 | |
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102 | char errbuf[100]; |
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103 | int errcode; |
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104 | |
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105 | ub2 type; |
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106 | |
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107 | if (!statement->stmt) { |
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108 | lua_pushboolean(L, 0); |
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109 | lua_pushstring(L, DBI_ERR_EXECUTE_INVALID); |
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110 | return 2; |
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111 | } |
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112 | |
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113 | for (p = 2; p <= n; p++) { |
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114 | int i = p - 1; |
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115 | int type = lua_type(L, p); |
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116 | char err[64]; |
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117 | const char *value; |
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118 | |
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119 | OCIBind *bnd = (OCIBind *)0; |
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120 | |
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121 | switch(type) { |
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122 | case LUA_TNIL: |
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123 | errflag = OCIBindByPos( |
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124 | statement->stmt, |
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125 | &bnd, |
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126 | statement->conn->err, |
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127 | i, |
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128 | NULL, |
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129 | 0, |
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130 | SQLT_CHR, |
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131 | (dvoid *)0, |
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132 | (ub2 *)0, |
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133 | (ub2 *)0, |
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134 | (ub4)0, |
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135 | (ub4 *)0, |
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136 | OCI_DEFAULT); |
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137 | break; |
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138 | case LUA_TNUMBER: |
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139 | case LUA_TSTRING: |
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140 | case LUA_TBOOLEAN: |
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141 | value = lua_tostring(L, p); |
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142 | |
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143 | errflag = OCIBindByPos( |
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144 | statement->stmt, |
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145 | &bnd, |
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146 | statement->conn->err, |
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147 | i, |
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148 | value, |
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149 | strlen(value), |
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150 | SQLT_CHR, |
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151 | (dvoid *)0, |
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152 | (ub2 *)0, |
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153 | (ub2 *)0, |
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154 | (ub4)0, |
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155 | (ub4 *)0, |
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156 | (ub4)OCI_DEFAULT); |
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157 | break; |
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158 | default: |
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159 | /* |
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160 | * Unknown/unsupported value type |
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161 | */ |
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162 | errflag = 1; |
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163 | snprintf(err, sizeof(err)-1, DBI_ERR_BINDING_TYPE_ERR, lua_typename(L, type)); |
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164 | errstr = err; |
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165 | } |
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166 | |
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167 | if (errflag) |
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168 | break; |
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169 | } |
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170 | |
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171 | if (errflag) { |
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172 | lua_pushboolean(L, 0); |
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173 | if (errstr) |
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174 | lua_pushfstring(L, DBI_ERR_BINDING_PARAMS, errstr); |
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175 | else { |
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176 | OCIErrorGet((dvoid *)statement->conn->err, (ub4) 1, (text *) NULL, &errcode, errbuf, (ub4) sizeof(errbuf), OCI_HTYPE_ERROR); |
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177 | |
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178 | lua_pushfstring(L, DBI_ERR_BINDING_PARAMS, errbuf); |
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179 | } |
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180 | |
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181 | return 2; |
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182 | } |
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183 | |
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184 | /* |
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185 | * statement type |
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186 | */ |
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187 | rc = OCIAttrGet( |
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188 | (dvoid *)statement->stmt, |
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189 | (ub4)OCI_HTYPE_STMT, |
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190 | (dvoid *)&type, |
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191 | (ub4 *)0, |
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192 | (ub4)OCI_ATTR_STMT_TYPE, |
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193 | statement->conn->err |
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194 | ); |
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195 | |
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196 | if (rc) { |
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197 | OCIErrorGet((dvoid *)statement->conn->err, (ub4) 1, (text *) NULL, &errcode, errbuf, (ub4) sizeof(errbuf), OCI_HTYPE_ERROR); |
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198 | |
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199 | lua_pushboolean(L, 0); |
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200 | lua_pushfstring(L, "Error getting type: %s", errbuf); |
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201 | |
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202 | return 2; |
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203 | } |
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204 | |
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205 | /* |
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206 | * execute statement |
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207 | */ |
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208 | rc = OCIStmtExecute( |
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209 | statement->conn->svc, |
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210 | statement->stmt, |
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211 | statement->conn->err, |
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212 | type == OCI_STMT_SELECT ? 0 : 1, |
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213 | (ub4)0, |
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214 | (CONST OCISnapshot *)NULL, |
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215 | (OCISnapshot *)NULL, |
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216 | statement->conn->autocommit ? OCI_COMMIT_ON_SUCCESS : OCI_DEFAULT |
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217 | ); |
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218 | |
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219 | if (rc) { |
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220 | OCIErrorGet((dvoid *)statement->conn->err, (ub4) 1, (text *) NULL, &errcode, errbuf, (ub4) sizeof(errbuf), OCI_HTYPE_ERROR); |
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221 | |
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222 | lua_pushboolean(L, 0); |
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223 | lua_pushfstring(L, DBI_ERR_BINDING_PARAMS, errbuf); |
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224 | |
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225 | return 2; |
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226 | } |
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227 | |
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228 | /* |
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229 | * get number of columns |
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230 | */ |
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231 | rc = OCIAttrGet( |
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232 | (dvoid *)statement->stmt, |
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233 | (ub4)OCI_HTYPE_STMT, |
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234 | (dvoid *)&num_columns, |
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235 | (ub4 *)0, |
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236 | (ub4)OCI_ATTR_PARAM_COUNT, |
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237 | statement->conn->err |
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238 | ); |
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239 | |
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240 | if (rc) { |
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241 | OCIErrorGet((dvoid *)statement->conn->err, (ub4) 1, (text *) NULL, &errcode, errbuf, (ub4) sizeof(errbuf), OCI_HTYPE_ERROR); |
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242 | |
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243 | lua_pushboolean(L, 0); |
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244 | lua_pushfstring(L, DBI_ERR_BINDING_PARAMS, errbuf); |
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245 | |
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246 | return 2; |
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247 | } |
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248 | |
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249 | statement->num_columns = num_columns; |
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250 | |
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251 | lua_pushboolean(L, 1); |
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252 | return 1; |
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253 | } |
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254 | |
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255 | /* |
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256 | * must be called after an execute |
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257 | */ |
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258 | static int statement_fetch_impl(lua_State *L, statement_t *statement, int named_columns) { |
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259 | int rc; |
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260 | sword status; |
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261 | int i; |
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262 | bindparams_t *bind; |
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263 | |
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264 | char errbuf[100]; |
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265 | int errcode; |
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266 | |
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267 | if (!statement->stmt) { |
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268 | luaL_error(L, DBI_ERR_FETCH_INVALID); |
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269 | return 0; |
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270 | } |
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271 | |
27 | 272 | statement->bind = (bindparams_t *)malloc(sizeof(bindparams_t) * statement->num_columns); |
273 | memset(statement->bind, 0, sizeof(bindparams_t) * statement->num_columns); | |
274 | bind = statement->bind; | |
17
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275 | |
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276 | for (i = 0; i < statement->num_columns; i++) { |
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277 | rc = OCIParamGet(statement->stmt, OCI_HTYPE_STMT, statement->conn->err, (dvoid **)&bind[i].param, i+1); |
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278 | if (rc) { |
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279 | OCIErrorGet((dvoid *)statement->conn->err, (ub4) 1, (text *) NULL, &errcode, errbuf, (ub4) sizeof(errbuf), OCI_HTYPE_ERROR); |
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280 | luaL_error(L, "param get %s", errbuf); |
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281 | } |
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282 | |
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283 | rc = OCIAttrGet(bind[i].param, OCI_DTYPE_PARAM, (dvoid *)&(bind[i].name), (ub4 *)&(bind[i].name_len), OCI_ATTR_NAME, statement->conn->err); |
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284 | if (rc) { |
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285 | OCIErrorGet((dvoid *)statement->conn->err, (ub4) 1, (text *) NULL, &errcode, errbuf, (ub4) sizeof(errbuf), OCI_HTYPE_ERROR); |
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286 | luaL_error(L, "name get %s", errbuf); |
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287 | } |
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288 | |
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289 | rc = OCIAttrGet(bind[i].param, OCI_DTYPE_PARAM, (dvoid *)&(bind[i].data_type), (ub4 *)0, OCI_ATTR_DATA_TYPE, statement->conn->err); |
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290 | if (rc) { |
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291 | OCIErrorGet((dvoid *)statement->conn->err, (ub4) 1, (text *) NULL, &errcode, errbuf, (ub4) sizeof(errbuf), OCI_HTYPE_ERROR); |
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292 | luaL_error(L, "datatype get %s", errbuf); |
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293 | } |
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294 | |
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295 | rc = OCIAttrGet(bind[i].param, OCI_DTYPE_PARAM, (dvoid *)&(bind[i].max_len), 0, OCI_ATTR_DATA_SIZE, statement->conn->err); |
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296 | if (rc) { |
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297 | OCIErrorGet((dvoid *)statement->conn->err, (ub4) 1, (text *) NULL, &errcode, errbuf, (ub4) sizeof(errbuf), OCI_HTYPE_ERROR); |
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298 | luaL_error(L, "datasize get %s", errbuf); |
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299 | } |
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300 | |
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301 | bind[i].data = calloc(bind[i].max_len+1, sizeof(char)); |
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302 | rc = OCIDefineByPos(statement->stmt, &bind[i].define, statement->conn->err, (ub4)i+1, bind[i].data, bind[i].max_len, SQLT_STR, (dvoid *)&(bind[i].null), (ub2 *)0, (ub2 *)0, (ub4)OCI_DEFAULT); |
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303 | if (rc) { |
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304 | OCIErrorGet((dvoid *)statement->conn->err, (ub4) 1, (text *) NULL, &errcode, errbuf, (ub4)sizeof(errbuf), OCI_HTYPE_ERROR); |
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305 | luaL_error(L, "define by pos %s", errbuf); |
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306 | } |
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307 | } |
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308 | |
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309 | status = OCIStmtFetch(statement->stmt, statement->conn->err, 1, OCI_FETCH_NEXT, OCI_DEFAULT); |
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310 | |
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311 | if (status == OCI_NO_DATA) { |
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312 | /* No more rows */ |
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313 | lua_pushnil(L); |
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314 | return 1; |
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315 | } else if (status != OCI_SUCCESS) { |
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316 | OCIErrorGet((dvoid *)statement->conn->err, (ub4)1, (text *)NULL, &errcode, errbuf, (ub4)sizeof(errbuf), OCI_HTYPE_ERROR); |
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317 | luaL_error(L, DBI_ERR_FETCH_FAILED, errbuf); |
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318 | } |
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319 | |
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320 | if (statement->num_columns) { |
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321 | int i; |
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322 | int d = 1; |
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323 | |
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324 | lua_newtable(L); |
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325 | |
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326 | for (i = 0; i < statement->num_columns; i++) { |
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327 | lua_push_type_t lua_push = oracle_to_lua_push(bind[i].data_type, bind[i].null); |
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328 | const char *name = strlower(bind[i].name); |
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329 | const char *data = bind[i].data; |
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330 | |
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331 | if (lua_push == LUA_PUSH_NIL) { |
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332 | if (named_columns) { |
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333 | LUA_PUSH_ATTRIB_NIL(name); |
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334 | } else { |
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335 | LUA_PUSH_ARRAY_NIL(d); |
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336 | } |
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337 | } else if (lua_push == LUA_PUSH_INTEGER) { |
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338 | int val = atoi(data); |
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339 | |
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340 | if (named_columns) { |
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341 | LUA_PUSH_ATTRIB_INT(name, val); |
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342 | } else { |
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343 | LUA_PUSH_ARRAY_INT(d, val); |
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344 | } |
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345 | } else if (lua_push == LUA_PUSH_NUMBER) { |
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346 | double val = strtod(data, NULL); |
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347 | |
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348 | if (named_columns) { |
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349 | LUA_PUSH_ATTRIB_FLOAT(name, val); |
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350 | } else { |
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351 | LUA_PUSH_ARRAY_FLOAT(d, val); |
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352 | } |
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353 | } else if (lua_push == LUA_PUSH_STRING) { |
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354 | if (named_columns) { |
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355 | LUA_PUSH_ATTRIB_STRING(name, data); |
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356 | } else { |
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357 | LUA_PUSH_ARRAY_STRING(d, data); |
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358 | } |
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359 | } else if (lua_push == LUA_PUSH_BOOLEAN) { |
18 | 360 | int val = atoi(data); |
17
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361 | |
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362 | if (named_columns) { |
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363 | LUA_PUSH_ATTRIB_BOOL(name, val); |
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364 | } else { |
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365 | LUA_PUSH_ARRAY_BOOL(d, val); |
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366 | } |
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367 | } else { |
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368 | luaL_error(L, DBI_ERR_UNKNOWN_PUSH); |
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369 | } |
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370 | } |
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371 | } else { |
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372 | /* |
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373 | * no columns returned by statement? |
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374 | */ |
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375 | lua_pushnil(L); |
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376 | } |
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377 | |
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378 | return 1; |
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379 | } |
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380 | |
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381 | static int next_iterator(lua_State *L) { |
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382 | statement_t *statement = (statement_t *)luaL_checkudata(L, lua_upvalueindex(1), DBD_ORACLE_STATEMENT); |
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383 | int named_columns = lua_toboolean(L, lua_upvalueindex(2)); |
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384 | |
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385 | return statement_fetch_impl(L, statement, named_columns); |
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386 | } |
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387 | |
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388 | /* |
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389 | * table = statement:fetch(named_indexes) |
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390 | */ |
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391 | static int statement_fetch(lua_State *L) { |
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392 | statement_t *statement = (statement_t *)luaL_checkudata(L, 1, DBD_ORACLE_STATEMENT); |
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393 | int named_columns = lua_toboolean(L, 2); |
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394 | |
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395 | return statement_fetch_impl(L, statement, named_columns); |
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396 | } |
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397 | |
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398 | /* |
21
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399 | * num_rows = statement:rowcount() |
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400 | */ |
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401 | static int statement_rowcount(lua_State *L) { |
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402 | luaL_error(L, DBI_ERR_NOT_IMPLEMENTED, DBD_ORACLE_STATEMENT, "rowcount"); |
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403 | |
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404 | return 0; |
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405 | } |
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406 | |
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407 | /* |
17
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408 | * iterfunc = statement:rows(named_indexes) |
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409 | */ |
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410 | static int statement_rows(lua_State *L) { |
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411 | if (lua_gettop(L) == 1) { |
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412 | lua_pushvalue(L, 1); |
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413 | lua_pushboolean(L, 0); |
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414 | } else { |
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415 | lua_pushvalue(L, 1); |
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416 | lua_pushboolean(L, lua_toboolean(L, 2)); |
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417 | } |
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418 | |
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419 | lua_pushcclosure(L, next_iterator, 2); |
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420 | return 1; |
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421 | } |
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422 | |
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423 | /* |
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424 | * __gc |
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425 | */ |
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426 | static int statement_gc(lua_State *L) { |
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427 | /* always free the handle */ |
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428 | statement_close(L); |
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429 | |
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|
430 | return 0; |
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431 | } |
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432 | |
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433 | int dbd_oracle_statement_create(lua_State *L, connection_t *conn, const char *sql_query) { |
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434 | int rc; |
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435 | statement_t *statement = NULL; |
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436 | OCIStmt *stmt; |
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437 | char *new_sql; |
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438 | |
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|
439 | /* |
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|
440 | * convert SQL string into a Oracle API compatible SQL statement |
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|
441 | */ |
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|
442 | new_sql = replace_placeholders(L, ':', sql_query); |
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443 | |
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|
444 | rc = OCIHandleAlloc((dvoid *)conn->oracle, (dvoid **)&stmt, OCI_HTYPE_STMT, 0, (dvoid **)0); |
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445 | rc = OCIStmtPrepare(stmt, conn->err, new_sql, strlen(new_sql), (ub4)OCI_NTV_SYNTAX, (ub4)OCI_DEFAULT); |
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446 | |
21c4feaeafe7
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|
447 | free(new_sql); |
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448 | |
21c4feaeafe7
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|
449 | statement = (statement_t *)lua_newuserdata(L, sizeof(statement_t)); |
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Added initial Oracle driver support - functionality is complete, but may be too buggy in its current state for any serious use.
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450 | statement->conn = conn; |
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451 | statement->stmt = stmt; |
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452 | statement->num_columns = 0; |
27 | 453 | statement->bind = NULL; |
17
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454 | |
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|
455 | luaL_getmetatable(L, DBD_ORACLE_STATEMENT); |
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Added initial Oracle driver support - functionality is complete, but may be too buggy in its current state for any serious use.
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|
456 | lua_setmetatable(L, -2); |
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457 | |
21c4feaeafe7
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|
458 | return 1; |
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|
459 | } |
21c4feaeafe7
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460 | |
21c4feaeafe7
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|
461 | int dbd_oracle_statement(lua_State *L) { |
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462 | static const luaL_Reg statement_methods[] = { |
21
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|
463 | {"affected", statement_affected}, |
17
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|
464 | {"close", statement_close}, |
30
8599f34c139b
Add 'columns' method to statement handles to retrieve column names from a result set
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465 | {"columns", statement_columns}, |
17
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466 | {"execute", statement_execute}, |
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467 | {"fetch", statement_fetch}, |
21
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468 | {"rowcount", statement_rowcount}, |
17
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469 | {"rows", statement_rows}, |
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470 | {NULL, NULL} |
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471 | }; |
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472 | |
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473 | static const luaL_Reg statement_class_methods[] = { |
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474 | {NULL, NULL} |
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475 | }; |
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Added initial Oracle driver support - functionality is complete, but may be too buggy in its current state for any serious use.
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476 | |
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Added initial Oracle driver support - functionality is complete, but may be too buggy in its current state for any serious use.
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477 | luaL_newmetatable(L, DBD_ORACLE_STATEMENT); |
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478 | luaL_register(L, 0, statement_methods); |
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479 | lua_pushvalue(L,-1); |
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480 | lua_setfield(L, -2, "__index"); |
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481 | |
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482 | lua_pushcfunction(L, statement_gc); |
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483 | lua_setfield(L, -2, "__gc"); |
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484 | |
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Added initial Oracle driver support - functionality is complete, but may be too buggy in its current state for any serious use.
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485 | luaL_register(L, DBD_ORACLE_STATEMENT, statement_class_methods); |
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Added initial Oracle driver support - functionality is complete, but may be too buggy in its current state for any serious use.
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486 | |
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Added initial Oracle driver support - functionality is complete, but may be too buggy in its current state for any serious use.
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487 | return 1; |
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488 | } |