Notes from a developer who writes ABAP on real SAP systems and hands that work to agents. Art, travel, the economy and books live next door.
MON 10.12
2026.10.12 Korea time
'26/10/11 UPDATE
Two sentiment indices released on the same day moved in opposite directions. The CBSI gathers this month’s results; the ESI gathers next month’s outlook and two consumer questions. The published contributions split September’s −0.5 and +0.5.
'26/10/11 UPDATE
Python's round() sends exact halfway values to the even side, so round(2.5) is 2. round(2.675, 2) giving 2.67 has a different cause: the binary float that is actually stored. Using Python 3.12.14 output, this note separates the two causes, shows how to round money with a Decimal built from a string and ROUND_HALF_UP, and compares JavaScript's Math.round().
'26/10/11 UPDATE
Two oil paintings and two watercolours by John Singer Sargent, enlarged at their brightest places, snow, a white skirt, marble, to tell where the white was laid on as paint and where it was left as paper.
'26/10/11 UPDATE
MOVE-CORRESPONDING between internal tables does not just fill same-name columns: it deletes the target table and rebuilds it with as many rows as the source. Using a fictional example, this note covers why KEEPING TARGET LINES only appends rows, how CORRESPONDING with a lookup table enriches existing rows by key, and the header line trap.
'26/10/10 UPDATE
A reading guide to volume 9 of Minumsa's World Literature series, Jean-Paul Sartre's What Is Literature?: why the champion of committed literature asks no commitment of poetry, painting or music, explained through one distinction in Chapter 1, followed by reading as a spinning top, the history of the reading public, the writer's situation in 1947, and what to mark as you read.
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MOVE-CORRESPONDING between internal tables does not just fill same-name columns: it deletes the target table and rebuilds it with as many rows as the source. Using a fictional example, this note covers why KEEPING TARGET LINES only appends rows, how CORRESPONDING with a lookup table enriches existing rows by key, and the header line trap.
Two sentiment indices released on the same day moved in opposite directions. The CBSI gathers this month’s results; the ESI gathers next month’s outlook and two consumer questions. The published contributions split September’s −0.5 and +0.5.
Python's round() sends exact halfway values to the even side, so round(2.5) is 2. round(2.675, 2) giving 2.67 has a different cause: the binary float that is actually stored. Using Python 3.12.14 output, this note separates the two causes, shows how to round money with a Decimal built from a string and ROUND_HALF_UP, and compares JavaScript's Math.round().
Two oil paintings and two watercolours by John Singer Sargent, enlarged at their brightest places, snow, a white skirt, marble, to tell where the white was laid on as paint and where it was left as paper.
In the same August, Korea’s customs trade surplus was $34.78 billion while the Bank of Korea’s balance of payments goods surplus was $46.81 billion. This note follows how change of ownership, merchanting and CIF versus FOB valuation open a $12.03 billion gap, with a small hypothetical calculation.
Four paintings by Jean-Siméon Chardin from about 1728 to 1735, each looked at once from a distance and once up close, to follow the distance at which an object breaks into brushstrokes and becomes an object again.
A reading guide to volume 9 of Minumsa's World Literature series, Jean-Paul Sartre's What Is Literature?: why the champion of committed literature asks no commitment of poetry, painting or music, explained through one distinction in Chapter 1, followed by reading as a spinning top, the history of the reading public, the writer's situation in 1947, and what to mark as you read.
A reading guide to volume 8 of Minumsa's World Literature series, Thomas Mann's Tonio Kröger, Tristan, Death in Venice: the eight stories and four translators, the nine chapters of “Tonio Kröger,” where Tonio at the glass door, Spinell on the gravel path and Aschenbach in his beach chair stand, the mirror scenes in “Death in Venice,” and what to mark as you read.
Three APIs were called with Promise.all; one returned a 500 and the code jumped to catch. Yet the server log shows the other two requests were handled to the end. Using a fake API on 127.0.0.1 and Node.js v24.21.0, this note runs Promise.all, Promise.allSettled and Promise.all with an AbortController to see what stops and what keeps going, and explains why abort() does not undo work the server has already done.
ABAP fixes the calculation type first, including the result field, and integer arithmetic rounds after every division instead of truncating. Using a fictional example, this note covers why 7 / 2 gives 4 and 7 / 2 * 2 gives 8, when an inline declaration drops decimal places, and how to use DIV and MOD when you need truncation.
Korea’s foreign exchange reserves fell $1.72 billion in September, but dollar sales are not among the reasons the Bank of Korea gave. This note separates deposits, currency conversion and rounding, and shows where actual net dollar sales are published three months later.
AT NEW kunnr treats kunnr and every column to its left as the group key, and when you read with INTO, the columns right of the key turn into asterisks and initial values inside the AT block. With four fictional sales rows, this note covers the causes, three fixes (column order, copying values, GROUP BY), WHERE conditions and how the documentation editions differ.