Class: DuckDB::Appender

Inherits:
Object
  • Object
show all
Includes:
Converter
Defined in:
lib/duckdb/appender.rb,
ext/duckdb/appender.c

Overview

The DuckDB::Appender encapsulates DuckDB Appender.

require 'duckdb'
db = DuckDB::Database.open
con = db.connect
con.query('CREATE TABLE users (id INTEGER, name VARCHAR)')
appender = con.appender('users')
appender.append_row(1, 'Alice')

Constant Summary collapse

RANGE_INT16 = 
-32_768..32_767
RANGE_INT32 = 
-2_147_483_648..2_147_483_647
RANGE_INT64 = 
-9_223_372_036_854_775_808..9_223_372_036_854_775_807

Constants included from Converter

Converter::EPOCH, Converter::EPOCH_UTC, Converter::FLIP_HUGEINT, Converter::HALF_HUGEINT, Converter::HALF_HUGEINT_BIT

Instance Method Summary collapse

Methods included from Converter

_parse_date, _parse_time, _to_date, _to_decimal_from_hugeint, _to_decimal_from_value, _to_hugeint_from_vector, _to_infinity, _to_interval_from_vector, _to_query_progress, _to_time, _to_time_from_duckdb_time, _to_time_from_duckdb_time_tz, _to_time_from_duckdb_timestamp_ms, _to_time_from_duckdb_timestamp_ns, _to_time_from_duckdb_timestamp_s, _to_time_from_duckdb_timestamp_tz, _to_uuid_from_vector

Constructor Details

#initialize(con, schema, table) ⇒ Object 



57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
 
# File 'ext/duckdb/appender.c', line 57

static VALUE appender_initialize(VALUE self, VALUE con, VALUE schema, VALUE table) {

    rubyDuckDBConnection *ctxcon;
    rubyDuckDBAppender *ctx;
    char *pschema = 0;

    if (!rb_obj_is_kind_of(con, cDuckDBConnection)) {
        rb_raise(rb_eTypeError, "1st argument should be instance of DackDB::Connection");
    }

    TypedData_Get_Struct(self, rubyDuckDBAppender, &appender_data_type, ctx);
    ctxcon = get_struct_connection(con);

    if (schema != Qnil) {
        pschema = StringValuePtr(schema);
    }

    if (duckdb_appender_create(ctxcon->con, pschema, StringValuePtr(table), &(ctx->appender)) == DuckDBError) {
        rb_raise(eDuckDBError, "failed to create appender");
    }
    return self;
}

Instance Method Details

#append(value) ⇒ Object

appends value.

require 'duckdb'
db = DuckDB::Database.open
con = db.connect
con.query('CREATE TABLE users (id INTEGER, name VARCHAR)')
appender = con.appender('users')
appender.begin_row
appender.append(1)
appender.append('Alice')
appender.end_row



179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
 
# File 'lib/duckdb/appender.rb', line 179

def append(value)
  case value
  when NilClass
    append_null
  when Float
    append_double(value)
  when Integer
    case value
    when RANGE_INT16
      append_int16(value)
    when RANGE_INT32
      append_int32(value)
    when RANGE_INT64
      append_int64(value)
    else
      append_hugeint(value)
    end
  when String
    blob?(value) ? append_blob(value) : append_varchar(value)
  when TrueClass, FalseClass
    append_bool(value)
  when Time
    append_timestamp(value)
  when Date
    append_date(value)
  when DuckDB::Interval
    append_interval(value)
  else
    raise(DuckDB::Error, "not supported type #{value} (#{value.class})")
  end
end

#append_blob(val) ⇒ Object 



260
261
262
263
264
265
266
267
268
269
270
271
272
 
# File 'ext/duckdb/appender.c', line 260

static VALUE appender_append_blob(VALUE self, VALUE val) {
    rubyDuckDBAppender *ctx;

    char *pval = StringValuePtr(val);
    idx_t length = (idx_t)RSTRING_LEN(val);

    TypedData_Get_Struct(self, rubyDuckDBAppender, &appender_data_type, ctx);

    if (duckdb_append_blob(ctx->appender, (void *)pval, length) == DuckDBError) {
        rb_raise(eDuckDBError, "failed to append");
    }
    return self;
}

#append_bool(val) ⇒ Object 



100
101
102
103
104
105
106
107
108
109
110
111
112
 
# File 'ext/duckdb/appender.c', line 100

static VALUE appender_append_bool(VALUE self, VALUE val) {
    rubyDuckDBAppender *ctx;
    TypedData_Get_Struct(self, rubyDuckDBAppender, &appender_data_type, ctx);

    if (val != Qtrue && val != Qfalse) {
        rb_raise(rb_eArgError, "argument must be boolean");
    }

    if (duckdb_append_bool(ctx->appender, (val == Qtrue)) == DuckDBError) {
        rb_raise(eDuckDBError, "failed to append boolean");
    }
    return self;
}

#append_date(value) ⇒ Object

appends date value.

require 'duckdb'
db = DuckDB::Database.open
con = db.connect
con.query('CREATE TABLE dates (date_value DATE)')
appender = con.appender('dates')
appender.begin_row
appender.append_date(Date.today)
# or
# appender.append_date(Time.now)
# appender.append_date('2021-10-10')
appender.end_row
appender.flush



76
77
78
79
80
81
82
83
84
85
86
87
88
89
 
# File 'lib/duckdb/appender.rb', line 76

def append_date(value)
  date = case value
         when Date, Time
           value
         else
           begin
             Date.parse(value)
           rescue
             raise(ArgumentError, "Cannot parse argument `#{value}` to Date.")
           end
         end

  _append_date(date.year, date.month, date.day)
end

#append_double(val) ⇒ Object 



222
223
224
225
226
227
228
229
230
231
232
 
# File 'ext/duckdb/appender.c', line 222

static VALUE appender_append_double(VALUE self, VALUE val) {
    rubyDuckDBAppender *ctx;
    double dval = NUM2DBL(val);

    TypedData_Get_Struct(self, rubyDuckDBAppender, &appender_data_type, ctx);

    if (duckdb_append_double(ctx->appender, dval) == DuckDBError) {
        rb_raise(eDuckDBError, "failed to append");
    }
    return self;
}

#append_float(val) ⇒ Object 



210
211
212
213
214
215
216
217
218
219
220
 
# File 'ext/duckdb/appender.c', line 210

static VALUE appender_append_float(VALUE self, VALUE val) {
    rubyDuckDBAppender *ctx;
    float fval = (float)NUM2DBL(val);

    TypedData_Get_Struct(self, rubyDuckDBAppender, &appender_data_type, ctx);

    if (duckdb_append_float(ctx->appender, fval) == DuckDBError) {
        rb_raise(eDuckDBError, "failed to append");
    }
    return self;
}

#append_hugeint(value) ⇒ Object

appends huge int value.

require 'duckdb'
db = DuckDB::Database.open
con = db.connect
con.query('CREATE TABLE numbers (num HUGEINT)')
appender = con.appender('numbers')
appender
  .begin_row
  .append_hugeint(-170_141_183_460_469_231_731_687_303_715_884_105_727)
  .end_row



37
38
39
40
 
# File 'lib/duckdb/appender.rb', line 37

def append_hugeint(value)
  lower, upper = integer_to_hugeint(value)
  _append_hugeint(lower, upper)
end

#append_int16(val) ⇒ Object 



126
127
128
129
130
131
132
133
134
135
136
 
# File 'ext/duckdb/appender.c', line 126

static VALUE appender_append_int16(VALUE self, VALUE val) {
    rubyDuckDBAppender *ctx;
    int16_t i16val = (int16_t)NUM2INT(val);

    TypedData_Get_Struct(self, rubyDuckDBAppender, &appender_data_type, ctx);

    if (duckdb_append_int16(ctx->appender, i16val) == DuckDBError) {
        rb_raise(eDuckDBError, "failed to append");
    }
    return self;
}

#append_int32(val) ⇒ Object 



138
139
140
141
142
143
144
145
146
147
148
 
# File 'ext/duckdb/appender.c', line 138

static VALUE appender_append_int32(VALUE self, VALUE val) {
    rubyDuckDBAppender *ctx;
    int32_t i32val = (int32_t)NUM2INT(val);

    TypedData_Get_Struct(self, rubyDuckDBAppender, &appender_data_type, ctx);

    if (duckdb_append_int32(ctx->appender, i32val) == DuckDBError) {
        rb_raise(eDuckDBError, "failed to append");
    }
    return self;
}

#append_int64(val) ⇒ Object 



150
151
152
153
154
155
156
157
158
159
160
 
# File 'ext/duckdb/appender.c', line 150

static VALUE appender_append_int64(VALUE self, VALUE val) {
    rubyDuckDBAppender *ctx;
    int64_t i64val = (int64_t)NUM2LL(val);

    TypedData_Get_Struct(self, rubyDuckDBAppender, &appender_data_type, ctx);

    if (duckdb_append_int64(ctx->appender, i64val) == DuckDBError) {
        rb_raise(eDuckDBError, "failed to append");
    }
    return self;
}

#append_int8(val) ⇒ Object 



114
115
116
117
118
119
120
121
122
123
124
 
# File 'ext/duckdb/appender.c', line 114

static VALUE appender_append_int8(VALUE self, VALUE val) {
    rubyDuckDBAppender *ctx;
    int8_t i8val = (int8_t)NUM2INT(val);

    TypedData_Get_Struct(self, rubyDuckDBAppender, &appender_data_type, ctx);

    if (duckdb_append_int8(ctx->appender, i8val) == DuckDBError) {
        rb_raise(eDuckDBError, "failed to append");
    }
    return self;
}

#append_interval(value) ⇒ Object

appends interval. The argument must be ISO8601 duration format. WARNING: This method is expremental.

require 'duckdb'
db = DuckDB::Database.open
con = db.connect
con.query('CREATE TABLE intervals (interval_value INTERVAL)')
appender = con.appender('intervals')
appender
  .begin_row
  .append_interval('P1Y2D') # => append 1 year 2 days interval.
  .end_row
  .flush



161
162
163
164
 
# File 'lib/duckdb/appender.rb', line 161

def append_interval(value)
  value = Interval.to_interval(value)
  _append_interval(value.interval_months, value.interval_days, value.interval_micros)
end

#append_null ⇒ Object 



274
275
276
277
278
279
280
281
282
 
# File 'ext/duckdb/appender.c', line 274

static VALUE appender_append_null(VALUE self) {
    rubyDuckDBAppender *ctx;
    TypedData_Get_Struct(self, rubyDuckDBAppender, &appender_data_type, ctx);

    if (duckdb_append_null(ctx->appender) == DuckDBError) {
        rb_raise(eDuckDBError, "failed to append");
    }
    return self;
}

#append_row(*args) ⇒ Object

append a row.

appender.append_row(1, 'Alice')

is same as:

appender.begin_row
appender.append(1)
appender.append('Alice')
appender.end_row



223
224
225
226
227
228
229
 
# File 'lib/duckdb/appender.rb', line 223

def append_row(*args)
  begin_row
  args.each do |arg|
    append(arg)
  end
  end_row
end

#append_time(value) ⇒ Object

appends time value.

require 'duckdb'
db = DuckDB::Database.open
con = db.connect
con.query('CREATE TABLE times (time_value TIME)')
appender = con.appender('times')
appender.begin_row
appender.append_time(Time.now)
# or
# appender.append_time('01:01:01')
appender.end_row
appender.flush



106
107
108
109
110
 
# File 'lib/duckdb/appender.rb', line 106

def append_time(value)
  time = _parse_time(value)

  _append_time(time.hour, time.min, time.sec, time.usec)
end

#append_timestamp(value) ⇒ Object

appends timestamp value.

require 'duckdb'
db = DuckDB::Database.open
con = db.connect
con.query('CREATE TABLE timestamps (timestamp_value TIMESTAMP)')
appender = con.appender('timestamps')
appender.begin_row
appender.append_time(Time.now)
# or
# appender.append_time(Date.today)
# appender.append_time('2021-08-01 01:01:01')
appender.end_row
appender.flush



128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
 
# File 'lib/duckdb/appender.rb', line 128

def append_timestamp(value)
  time = case value
         when Time
           value
         when Date
           value.to_time
         else
           begin
             Time.parse(value)
           rescue
             raise(ArgumentError, "Cannot parse argument `#{value}` to Time or Date.")
           end
         end

  _append_timestamp(time.year, time.month, time.day, time.hour, time.min, time.sec, time.nsec / 1000)
end

#append_uhugeint(value) ⇒ Object

appends unsigned huge int value.

require 'duckdb'
db = DuckDB::Database.open
con = db.connect
con.query('CREATE TABLE numbers (num UHUGEINT)')
appender = con.appender('numbers')
appender
  .begin_row
  .append_hugeint(340_282_366_920_938_463_463_374_607_431_768_211_455)
  .end_row



55
56
57
58
 
# File 'lib/duckdb/appender.rb', line 55

def append_uhugeint(value)
  lower, upper = integer_to_hugeint(value)
  _append_uhugeint(lower, upper)
end

#append_uint16(val) ⇒ Object 



174
175
176
177
178
179
180
181
182
183
184
 
# File 'ext/duckdb/appender.c', line 174

static VALUE appender_append_uint16(VALUE self, VALUE val) {
    rubyDuckDBAppender *ctx;
    uint16_t ui16val = (uint16_t)NUM2UINT(val);

    TypedData_Get_Struct(self, rubyDuckDBAppender, &appender_data_type, ctx);

    if (duckdb_append_uint16(ctx->appender, ui16val) == DuckDBError) {
        rb_raise(eDuckDBError, "failed to append");
    }
    return self;
}

#append_uint32(val) ⇒ Object 



186
187
188
189
190
191
192
193
194
195
196
 
# File 'ext/duckdb/appender.c', line 186

static VALUE appender_append_uint32(VALUE self, VALUE val) {
    rubyDuckDBAppender *ctx;
    uint32_t ui32val = (uint32_t)NUM2UINT(val);

    TypedData_Get_Struct(self, rubyDuckDBAppender, &appender_data_type, ctx);

    if (duckdb_append_uint32(ctx->appender, ui32val) == DuckDBError) {
        rb_raise(eDuckDBError, "failed to append");
    }
    return self;
}

#append_uint64(val) ⇒ Object 



198
199
200
201
202
203
204
205
206
207
208
 
# File 'ext/duckdb/appender.c', line 198

static VALUE appender_append_uint64(VALUE self, VALUE val) {
    rubyDuckDBAppender *ctx;
    uint64_t ui64val = (uint64_t)NUM2ULL(val);

    TypedData_Get_Struct(self, rubyDuckDBAppender, &appender_data_type, ctx);

    if (duckdb_append_uint64(ctx->appender, ui64val) == DuckDBError) {
        rb_raise(eDuckDBError, "failed to append");
    }
    return self;
}

#append_uint8(val) ⇒ Object 



162
163
164
165
166
167
168
169
170
171
172
 
# File 'ext/duckdb/appender.c', line 162

static VALUE appender_append_uint8(VALUE self, VALUE val) {
    rubyDuckDBAppender *ctx;
    int8_t ui8val = (uint8_t)NUM2UINT(val);

    TypedData_Get_Struct(self, rubyDuckDBAppender, &appender_data_type, ctx);

    if (duckdb_append_uint8(ctx->appender, ui8val) == DuckDBError) {
        rb_raise(eDuckDBError, "failed to append");
    }
    return self;
}

#append_varchar(val) ⇒ Object 



234
235
236
237
238
239
240
241
242
243
244
 
# File 'ext/duckdb/appender.c', line 234

static VALUE appender_append_varchar(VALUE self, VALUE val) {
    rubyDuckDBAppender *ctx;
    char *pval = StringValuePtr(val);

    TypedData_Get_Struct(self, rubyDuckDBAppender, &appender_data_type, ctx);

    if (duckdb_append_varchar(ctx->appender, pval) == DuckDBError) {
        rb_raise(eDuckDBError, "failed to append");
    }
    return self;
}

#append_varchar_length(val, len) ⇒ Object 



246
247
248
249
250
251
252
253
254
255
256
257
258
 
# File 'ext/duckdb/appender.c', line 246

static VALUE appender_append_varchar_length(VALUE self, VALUE val, VALUE len) {
    rubyDuckDBAppender *ctx;

    char *pval = StringValuePtr(val);
    idx_t length = (idx_t)NUM2ULL(len);

    TypedData_Get_Struct(self, rubyDuckDBAppender, &appender_data_type, ctx);

    if (duckdb_append_varchar_length(ctx->appender, pval, length) == DuckDBError) {
        rb_raise(eDuckDBError, "failed to append");
    }
    return self;
}

#begin_row ⇒ Object 



80
81
82
83
84
85
86
87
88
 
# File 'ext/duckdb/appender.c', line 80

static VALUE appender_begin_row(VALUE self) {
    rubyDuckDBAppender *ctx;
    TypedData_Get_Struct(self, rubyDuckDBAppender, &appender_data_type, ctx);

    if (duckdb_appender_begin_row(ctx->appender) == DuckDBError) {
        rb_raise(eDuckDBError, "failed to flush");
    }
    return self;
}

#close ⇒ Object 



378
379
380
381
382
383
384
385
386
 
# File 'ext/duckdb/appender.c', line 378

static VALUE appender_close(VALUE self) {
    rubyDuckDBAppender *ctx;
    TypedData_Get_Struct(self, rubyDuckDBAppender, &appender_data_type, ctx);

    if (duckdb_appender_close(ctx->appender) == DuckDBError) {
        rb_raise(eDuckDBError, "failed to flush");
    }
    return self;
}

#end_row ⇒ Object 



90
91
92
93
94
95
96
97
98
 
# File 'ext/duckdb/appender.c', line 90

static VALUE appender_end_row(VALUE self) {
    rubyDuckDBAppender *ctx;
    TypedData_Get_Struct(self, rubyDuckDBAppender, &appender_data_type, ctx);

    if (duckdb_appender_end_row(ctx->appender) == DuckDBError) {
        rb_raise(eDuckDBError, "failed to flush");
    }
    return self;
}

#flush ⇒ Object 



368
369
370
371
372
373
374
375
376
 
# File 'ext/duckdb/appender.c', line 368

static VALUE appender_flush(VALUE self) {
    rubyDuckDBAppender *ctx;
    TypedData_Get_Struct(self, rubyDuckDBAppender, &appender_data_type, ctx);

    if (duckdb_appender_flush(ctx->appender) == DuckDBError) {
        rb_raise(eDuckDBError, "failed to flush");
    }
    return self;
}